When a user tries to connect to a database, the combination of user name, @, and password are hashed using SHA-256, and this hash value is transmitted to the database. This step does not protect against an attacker that re-uses the value if he is able to listen to the (unencrypted) transmission between the client and the server. But, the passwords are never transmitted as plain text, even when using an unencrypted connection between client and server. That means if a user reuses the same password for different things, this password is still protected up to some point. See also 'RFC 2617 - HTTP Authentication: Basic and Digest Access Authentication' for more information.
When a user tries to connect to a database, the combination of user name, @, and password are hashed using SHA-256, and this hash value is transmitted to the database. This step does not protect against an attacker that re-uses the value if he is able to listen to the (unencrypted) transmission between the client and the server. But, the passwords are never transmitted as plain text, even when using an unencrypted connection between client and server. That means if a user reuses the same password for different things, this password is still protected up to some point. See also 'RFC 2617 - HTTP Authentication: Basic and Digest Access Authentication' for more information.
@advanced_1276_p
@advanced_1276_p
When a new database or user is created, a new cryptographically secure random salt value is generated. The size of the salt is 64 bits. Using the random salt reduces the risk of an attacker pre-calculating hash values for many different (commonly used) passwords.
When a new database or user is created, a new random salt value is generated. The size of the salt is 64 bits. Using the random salt reduces the risk of an attacker pre-calculating hash values for many different (commonly used) passwords.
@advanced_1277_p
@advanced_1277_p
The combination of user-password hash value (see above) and salt is hashed using SHA-256. The resulting value is stored in the database. When a user tries to connect to the database, the database combines user-password hash value with the stored salt value and calculates the hash value. Other products use multiple iterations (hash the hash value again and again), but this is not done in this product to reduce the risk of denial of service attacks (where the attacker tries to connect with bogus passwords, and the server spends a lot of time calculating the hash value for each password). The reasoning is: if the attacker has access to the hashed passwords, he also has access to the data in plain text, and therefore does not need the password any more. If the data is protected by storing it on another computer and only accessible remotely, then the iteration count is not required at all.
The combination of user-password hash value (see above) and salt is hashed using SHA-256. The resulting value is stored in the database. When a user tries to connect to the database, the database combines user-password hash value with the stored salt value and calculates the hash value. Other products use multiple iterations (hash the hash value again and again), but this is not done in this product to reduce the risk of denial of service attacks (where the attacker tries to connect with bogus passwords, and the server spends a lot of time calculating the hash value for each password). The reasoning is: if the attacker has access to the hashed passwords, he also has access to the data in plain text, and therefore does not need the password any more. If the data is protected by storing it on another computer and only accessible remotely, then the iteration count is not required at all.
...
@@ -1349,45 +1349,48 @@ For large attachments, use a public temporary storage such as <a href="http://ra
...
@@ -1349,45 +1349,48 @@ For large attachments, use a public temporary storage such as <a href="http://ra
Google Group versus issue tracking: Use the <a href="http://groups.google.com/group/h2-database">Google Group</a> for questions or if you are not sure it's a bug. If you are sure it's a bug, you can create an <a href="http://code.google.com/p/h2database/issues/list">issue</a>, but you don't need to (sending an email to the group is enough). Please note that only few people monitor the issue tracking system.
Google Group versus issue tracking: Use the <a href="http://groups.google.com/group/h2-database">Google Group</a> for questions or if you are not sure it's a bug. If you are sure it's a bug, you can create an <a href="http://code.google.com/p/h2database/issues/list">issue</a>, but you don't need to (sending an email to the group is enough). Please note that only few people monitor the issue tracking system.
@build_1082_li
@build_1082_li
For out-of-memory problems, please analyze the problem yourself first, for example using the command line option <code>-XX:+HeapDumpOnOutOfMemoryError</code> and a memory analysis tool such as the <a href="http://www.eclipse.org/mat">Eclipse Memory Analyzer (MAT)</a>.
@build_1083_li
It may take a few days to get an answers. Please do not double post.
It may take a few days to get an answers. Please do not double post.
@build_1083_h2
@build_1084_h2
Automated Build
Automated Build
@build_1084_p
@build_1085_p
This build process is automated and runs regularly. The build process includes running the tests and code coverage, using the command line <code>./build.sh clean jar coverage -Dh2.ftpPassword=... uploadBuild</code>. The last results are available here:
This build process is automated and runs regularly. The build process includes running the tests and code coverage, using the command line <code>./build.sh clean jar coverage -Dh2.ftpPassword=... uploadBuild</code>. The last results are available here:
@build_1085_a
@build_1086_a
Test Output
Test Output
@build_1086_a
@build_1087_a
Code Coverage Summary
Code Coverage Summary
@build_1087_a
@build_1088_a
Code Coverage Details (download, 1.3 MB)
Code Coverage Details (download, 1.3 MB)
@build_1088_a
@build_1089_a
Build Newsfeed
Build Newsfeed
@build_1089_a
@build_1090_a
Latest Jar File (download, 1 MB)
Latest Jar File (download, 1 MB)
@build_1090_h2
@build_1091_h2
Generating Railroad Diagrams
Generating Railroad Diagrams
@build_1091_p
@build_1092_p
The railroad diagrams are HTML, formatted as nested tables. The diagrams are generated as follows:
The railroad diagrams are HTML, formatted as nested tables. The diagrams are generated as follows:
@build_1092_li
@build_1093_li
The BNF parser (<code>org.h2.bnf.Bnf</code>) reads and parses the BNF from the file <code>help.csv</code>.
The BNF parser (<code>org.h2.bnf.Bnf</code>) reads and parses the BNF from the file <code>help.csv</code>.
@build_1093_li
@build_1094_li
The page parser (<code>org.h2.server.web.PageParser</code>) reads the template HTML file and fills in the diagrams.
The page parser (<code>org.h2.server.web.PageParser</code>) reads the template HTML file and fills in the diagrams.
@build_1094_li
@build_1095_li
The rail images (one straight, four junctions, two turns) are generated using a simple Java application.
The rail images (one straight, four junctions, two turns) are generated using a simple Java application.
@build_1095_p
@build_1096_p
To generate railroad diagrams for other grammars, see the package <code>org.h2.jcr</code>. This package is used to generate the SQL-2 railroad diagrams for the JCR 2.0 specification.
To generate railroad diagrams for other grammars, see the package <code>org.h2.jcr</code>. This package is used to generate the SQL-2 railroad diagrams for the JCR 2.0 specification.
@changelog_1000_h1
@changelog_1000_h1
...
@@ -1397,1044 +1400,1050 @@ Change Log
...
@@ -1397,1044 +1400,1050 @@ Change Log
Next Version (unreleased)
Next Version (unreleased)
@changelog_1002_li
@changelog_1002_li
Nested UNION/INTERSECT queries with brackets could produce the wrong result if used within a subquery. Example: select count(*) from (select 1 union (select 2 intersect select 2)) x;
If the database was already closed using SHUTDOWN IMMEDIATELY, closing a second connection could throw a NullPointerException if there was a local temporary table.
@changelog_1003_li
@changelog_1003_li
Comparing an column against a constant expression with a higher precision or length than the column could give wrong results (the expression was truncated before comparing).
Less classes are loaded when using the database in embedded mode.
@changelog_1004_li
@changelog_1004_li
Improved PostgreSQL compatibility (support SHOW DEFAULT_TRANSACTION_ISOLATION).
Nested UNION/INTERSECT queries with brackets could produce the wrong result if used within a subquery. Example: select count(*) from (select 1 union (select 2 intersect select 2)) x;
@changelog_1005_li
@changelog_1005_li
Documentation: the javadocs for Csv.write and read used the wrong default charset.
Comparing an column against a constant expression with a higher precision or length than the column could give wrong results (the expression was truncated before comparing).
@changelog_1006_li
@changelog_1006_li
MVCC: if the table was locked in exclusive mode (such as SELECT ... FOR UPDATE), another session could query the table. This is now longer possible.
Improved PostgreSQL compatibility (support SHOW DEFAULT_TRANSACTION_ISOLATION).
@changelog_1007_li
@changelog_1007_li
If a FOR UPDATE query was executed twice (using a PreparedStatement), the table was not locked.
Documentation: the javadocs for Csv.write and read used the wrong default charset.
@changelog_1008_li
@changelog_1008_li
Triggers: INSTEAD OF triggers are now supported. Such triggers can be defined on views.
MVCC: if the table was locked in exclusive mode (such as SELECT ... FOR UPDATE), another session could query the table. This is now longer possible.
@changelog_1009_li
@changelog_1009_li
MVCC: if the page store is disabled, rollback of multiple rows with the same index key did not work correctly.
If a FOR UPDATE query was executed twice (using a PreparedStatement), the table was not locked.
@changelog_1010_li
@changelog_1010_li
New system property h2.identifiersToUpper. If set to false, identifiers in SQL statements are case sensitive even if they are not quoted.
Triggers: INSTEAD OF triggers are now supported. Such triggers can be defined on views.
@changelog_1011_li
@changelog_1011_li
Slightly improved performance if the table is already locked.
MVCC: if the page store is disabled, rollback of multiple rows with the same index key did not work correctly.
@changelog_1012_li
@changelog_1012_li
CompressLZF: faster decompression.
New system property h2.identifiersToUpper. If set to false, identifiers in SQL statements are case sensitive even if they are not quoted.
@changelog_1013_li
@changelog_1013_li
PgServer: the wrong size was sent for VARCHAR data. Thanks again to Sergi Vladykin for the patch.
Slightly improved performance if the table is already locked.
@changelog_1014_li
@changelog_1014_li
CompressLZF: faster decompression.
@changelog_1015_li
PgServer: the wrong size was sent for VARCHAR data. Thanks again to Sergi Vladykin for the patch.
@changelog_1016_li
Serialized access mode (server-less multi-connection mode): fixed getGeneratedKeys() for sequences.
Serialized access mode (server-less multi-connection mode): fixed getGeneratedKeys() for sequences.
@changelog_1015_h2
@changelog_1017_h2
Version 1.2.127 (2010-01-15)
Version 1.2.127 (2010-01-15)
@changelog_1016_li
@changelog_1018_li
Serialized access mode (server-less multi-connection mode): sequences did not work as expected (there were gaps in generated values when using multiple connections).
Serialized access mode (server-less multi-connection mode): sequences did not work as expected (there were gaps in generated values when using multiple connections).
@changelog_1017_li
@changelog_1019_li
Page store: new databases can not be opened with older versions.
Page store: new databases can not be opened with older versions.
@changelog_1018_li
@changelog_1020_li
Page store: adding data to new database is now faster.
Page store: adding data to new database is now faster.
@changelog_1019_li
@changelog_1021_li
File system: getting the file name from a path is now faster. This should speed up BLOB and CLOB access.
File system: getting the file name from a path is now faster. This should speed up BLOB and CLOB access.
@changelog_1020_li
@changelog_1022_li
PgServer: incorrect SQL types were returned in result set meta data. Concurrently opening a database could fail (PG catalog initialization was not synchronized). Thanks a lot to Sergi Vladykin for providing the patches!
PgServer: incorrect SQL types were returned in result set meta data. Concurrently opening a database could fail (PG catalog initialization was not synchronized). Thanks a lot to Sergi Vladykin for providing the patches!
@changelog_1021_li
@changelog_1023_li
SHOW COLUMNS did not work correctly if there where multiple indexes on the same columns.
SHOW COLUMNS did not work correctly if there where multiple indexes on the same columns.
@changelog_1022_li
@changelog_1024_li
Page store: the wrong write count was written to the database header. This could cause the server-less multi-connection mode to fail.
Page store: the wrong write count was written to the database header. This could cause the server-less multi-connection mode to fail.
@changelog_1023_li
@changelog_1025_li
Result sets larger than 2 GB threw an exception "Negative seek offset". Fixed.
Result sets larger than 2 GB threw an exception "Negative seek offset". Fixed.
@changelog_1024_li
@changelog_1026_li
If the system property h2.check was set to false, an ArrayIndexOutOfBoundsException could occur.
If the system property h2.check was set to false, an ArrayIndexOutOfBoundsException could occur.
@changelog_1025_li
@changelog_1027_li
Alter table is now supported even if a table has views defined.
Alter table is now supported even if a table has views defined.
@changelog_1026_li
@changelog_1028_li
Fulltext search: exceptions within the fulltext search package had the wrong SQL state.
Fulltext search: exceptions within the fulltext search package had the wrong SQL state.
@changelog_1027_li
@changelog_1029_li
The Lucene fulltext search ignored transaction rollback. Fixed using a trigger on rollback.
The Lucene fulltext search ignored transaction rollback. Fixed using a trigger on rollback.
@changelog_1028_li
@changelog_1030_li
Trigger can now be called on rollback.
Trigger can now be called on rollback.
@changelog_1029_li
@changelog_1031_li
The shell script h2.sh ignored command line line arguments.
The shell script h2.sh ignored command line line arguments.
@changelog_1030_li
@changelog_1032_li
When running H2 in the Google AppEngine for Java, a AccessControlException could be thrown when trying to open a read-only database. Fixed.
When running H2 in the Google AppEngine for Java, a AccessControlException could be thrown when trying to open a read-only database. Fixed.
@changelog_1031_li
@changelog_1033_li
The user home directory prefix (~) is now only expanded when followed by a slash or backslash, or standing alone.
The user home directory prefix (~) is now only expanded when followed by a slash or backslash, or standing alone.
@changelog_1032_li
@changelog_1034_li
Native fulltext search: before inserting or deleting data, FT_INIT() had to be called. This is no longer required.
Native fulltext search: before inserting or deleting data, FT_INIT() had to be called. This is no longer required.
@changelog_1033_li
@changelog_1035_li
The .trace.db file is now only created if required.
The .trace.db file is now only created if required.
@changelog_1034_li
@changelog_1036_li
Shell tool: improved PostgreSQL compatibility.
Shell tool: improved PostgreSQL compatibility.
@changelog_1035_li
@changelog_1037_li
Trying to open a database in read-only mode when a .lock.db file exists will now fail with a nice error message.
Trying to open a database in read-only mode when a .lock.db file exists will now fail with a nice error message.
@changelog_1036_li
@changelog_1038_li
H2 Console: data that is too long is now abbreviated as follows: text... (100000 characters). A large binary is abbreviated as follows: abcdef... (100000 bytes).
H2 Console: data that is too long is now abbreviated as follows: text... (100000 characters). A large binary is abbreviated as follows: abcdef... (100000 bytes).
@changelog_1037_li
@changelog_1039_li
Faster data conversion from BIGINT or INT to DECIMAL.
Faster data conversion from BIGINT or INT to DECIMAL.
@changelog_1038_li
@changelog_1040_li
Server-less multi-connection mode: try to delete log files if switching between read/write operations.
Server-less multi-connection mode: try to delete log files if switching between read/write operations.
@changelog_1039_li
@changelog_1041_li
CompressLZF: Faster decompress and improved javadocs
CompressLZF: Faster decompress and improved javadocs
@changelog_1040_h2
@changelog_1042_h2
Version 1.2.126 (2009-12-18)
Version 1.2.126 (2009-12-18)
@changelog_1041_li
@changelog_1043_li
The ChangeFileEncryption tool will now fail with an exception if the database is still in use. The Backup tool will also fail except when running in quiet mode.
The ChangeFileEncryption tool will now fail with an exception if the database is still in use. The Backup tool will also fail except when running in quiet mode.
@changelog_1042_li
@changelog_1044_li
CSVREAD: when reading the column names from the CSV file, column names that contain no special characters are considered case insensitive now.
CSVREAD: when reading the column names from the CSV file, column names that contain no special characters are considered case insensitive now.
@changelog_1043_li
@changelog_1045_li
Optimization index conditions of the form 'column=NULL' (which is always false; unlike 'column IS NULL').
Optimization index conditions of the form 'column=NULL' (which is always false; unlike 'column IS NULL').
@changelog_1044_li
@changelog_1046_li
Script command and tool: the primary key constraint is now listed before inserting the data. This will result in a smaller database when using the page store.
Script command and tool: the primary key constraint is now listed before inserting the data. This will result in a smaller database when using the page store.
@changelog_1045_li
@changelog_1047_li
Statements with IN(SELECT..) conditions could produce the wrong result. Example: index on id, name; query: select * from test where id between 1 and 3 and name in (select 'World').
Statements with IN(SELECT..) conditions could produce the wrong result. Example: index on id, name; query: select * from test where id between 1 and 3 and name in (select 'World').
@changelog_1046_li
@changelog_1048_li
Statements with IN(..) conditions could produce the wrong result when using views or nested select statements. Example: index on id; index on name; query: select * from (select * from test) where id=1 and name in('a', 'b'). select * from (select * from test) where id=1 and name in('Hello', 'World').
Statements with IN(..) conditions could produce the wrong result when using views or nested select statements. Example: index on id; index on name; query: select * from (select * from test) where id=1 and name in('a', 'b'). select * from (select * from test) where id=1 and name in('Hello', 'World').
@changelog_1047_li
@changelog_1049_li
Page store: a rollback of a relatively large transaction could fail with an ArrayIndexOutOfBoundsException or a 'row not found' exception in the PageBtreeIndex in some cases.
Page store: a rollback of a relatively large transaction could fail with an ArrayIndexOutOfBoundsException or a 'row not found' exception in the PageBtreeIndex in some cases.
@changelog_1048_li
@changelog_1050_li
JaQu: the decompiler has been improved, and a few test cases already work. It is still incomplete however.
JaQu: the decompiler has been improved, and a few test cases already work. It is still incomplete however.
@changelog_1049_li
@changelog_1051_li
LIKE: any letter is now allowed after the escape character (which is still '\' by default). Previously, an exception was thrown (unlike other databases) if it was not the escape character, '_' or '%'. If the escape character appears at the end of the pattern, the result is it is ignored (like PostgreSQL and MS SQL Server).
LIKE: any letter is now allowed after the escape character (which is still '\' by default). Previously, an exception was thrown (unlike other databases) if it was not the escape character, '_' or '%'. If the escape character appears at the end of the pattern, the result is it is ignored (like PostgreSQL and MS SQL Server).
@changelog_1050_li
@changelog_1052_li
The reserve heap memory is no longer used.
The reserve heap memory is no longer used.
@changelog_1051_li
@changelog_1053_li
Database.checkpoint() could throw a NullPointerException.
Database.checkpoint() could throw a NullPointerException.
@changelog_1052_h2
@changelog_1054_h2
Version 1.2.125 (2009-12-06)
Version 1.2.125 (2009-12-06)
@changelog_1053_li
@changelog_1055_li
Lucene fulltext search: the Lucene field names now match the table column names, except if the column names start with _ (in which case another _ is prepended). Unfortunately this change means existing fulltext indexes need to be re-built.
Lucene fulltext search: the Lucene field names now match the table column names, except if the column names start with _ (in which case another _ is prepended). Unfortunately this change means existing fulltext indexes need to be re-built.
@changelog_1054_li
@changelog_1056_li
The shell tool now has a very simple statement history.
The shell tool now has a very simple statement history.
@changelog_1055_li
@changelog_1057_li
The zip file system implementation now supports the '~' home directory prefix. Example database URL: jdbc:h2:zip:~/test.zip!/test
The zip file system implementation now supports the '~' home directory prefix. Example database URL: jdbc:h2:zip:~/test.zip!/test
@changelog_1056_li
@changelog_1058_li
Right outer joins on tables that were already 'inner joined' was processed incorrectly.
Right outer joins on tables that were already 'inner joined' was processed incorrectly.
@changelog_1057_li
@changelog_1059_li
Temporary files from LOB objects were not deleted early enough when using the server mode.
Temporary files from LOB objects were not deleted early enough when using the server mode.
@changelog_1058_li
@changelog_1060_li
Trying to alter a temporary table threw a strange exception. It is still not possible to do that, but the exception message is better now.
Trying to alter a temporary table threw a strange exception. It is still not possible to do that, but the exception message is better now.
@changelog_1059_li
@changelog_1061_li
When the system property h2.maxMemoryRowsDistinct was set, and using SELECT DISTINCT, the temporary table was not correctly dropped. This could cause problems in recovery when the process was killed.
When the system property h2.maxMemoryRowsDistinct was set, and using SELECT DISTINCT, the temporary table was not correctly dropped. This could cause problems in recovery when the process was killed.
@changelog_1060_li
@changelog_1062_li
Trigger that are called before a select statement are now supported. This allows to create tables that work like materialized views.
Trigger that are called before a select statement are now supported. This allows to create tables that work like materialized views.
@changelog_1061_li
@changelog_1063_li
Non-row based triggers were called even if the action didn't match the declared action (INSERT triggers were also called when deleting rows). This has been changed. The MERGE statement calls both INSERT and DELETE triggers.
Non-row based triggers were called even if the action didn't match the declared action (INSERT triggers were also called when deleting rows). This has been changed. The MERGE statement calls both INSERT and DELETE triggers.
@changelog_1062_li
@changelog_1064_li
Statements with IN(..) conditions could produce the wrong result or a data conversion error (since version 1.2.120). Examples: index on id, name, condition: id=1 and name in('Hello', 'x'); index on id, query: select * from (select * from test) where id=1 and name in('Hello', 'World').
Statements with IN(..) conditions could produce the wrong result or a data conversion error (since version 1.2.120). Examples: index on id, name, condition: id=1 and name in('Hello', 'x'); index on id, query: select * from (select * from test) where id=1 and name in('Hello', 'World').
@changelog_1063_li
@changelog_1065_li
The CompressTool was not multithreading safe. Because of this, the following database operations where also not multithreading safe (even when using different databases): the SCRIPT command (only when using compression), the COMPRESS function, and storing CLOB or BLOB data (only when compression is enabled).
The CompressTool was not multithreading safe. Because of this, the following database operations where also not multithreading safe (even when using different databases): the SCRIPT command (only when using compression), the COMPRESS function, and storing CLOB or BLOB data (only when compression is enabled).
@changelog_1064_li
@changelog_1066_li
The compression algorithm "LZF" is now about 33% faster than before when compressing small block (around 2 KB). It is much faster than Deflate, but the compression ratio is lower. Some of the optimizations are from Sam Van Oort, thanks a lot!
The compression algorithm "LZF" is now about 33% faster than before when compressing small block (around 2 KB). It is much faster than Deflate, but the compression ratio is lower. Some of the optimizations are from Sam Van Oort, thanks a lot!
@changelog_1065_li
@changelog_1067_li
Compressing large blocks of data didn't work when using the "Deflate" compression algorithm. Compressing a lot of data could run out of heap memory.
Compressing large blocks of data didn't work when using the "Deflate" compression algorithm. Compressing a lot of data could run out of heap memory.
@changelog_1066_li
@changelog_1068_li
The test cases don't access the file system directly, this simplifies GAE for Java testing. Thanks to Vince Bonfanti.
The test cases don't access the file system directly, this simplifies GAE for Java testing. Thanks to Vince Bonfanti.
@changelog_1067_li
@changelog_1069_li
More bugs in the server-less multi-connection mode have been fixed.
More bugs in the server-less multi-connection mode have been fixed.
@changelog_1068_li
@changelog_1070_li
When running against an old database, the SCRIPT statement could generate a SQL script that contained duplicate indexes (PRIMARY_KEY_E).
When running against an old database, the SCRIPT statement could generate a SQL script that contained duplicate indexes (PRIMARY_KEY_E).
@changelog_1069_li
@changelog_1071_li
JdbcConnectionPool.getConnection() could throw a NullPointerException.
JdbcConnectionPool.getConnection() could throw a NullPointerException.
@changelog_1070_li
@changelog_1072_li
User defined functions: the source code is now available using SELECT SOURCE FROM INFORMATION_SCHEMA.FUNCTION_ALIASES.
User defined functions: the source code is now available using SELECT SOURCE FROM INFORMATION_SCHEMA.FUNCTION_ALIASES.
@changelog_1071_li
@changelog_1073_li
User defined functions with source code didn't work after re-opening the database.
User defined functions with source code didn't work after re-opening the database.
@changelog_1072_li
@changelog_1074_li
The newsfeeds are now Atom 1.0 standard compliant.
The newsfeeds are now Atom 1.0 standard compliant.
@changelog_1073_li
@changelog_1075_li
The database is now closed after an out of memory exception, because the database could get corrupt otherwise.
The database is now closed after an out of memory exception, because the database could get corrupt otherwise.
@changelog_1074_li
@changelog_1076_li
Better error message if both AUTO_SERVER and SERIALIZED parameters are set to TRUE.
Better error message if both AUTO_SERVER and SERIALIZED parameters are set to TRUE.
@changelog_1075_li
@changelog_1077_li
Drop table did not delete lob files in old file store (not PAGE_STORE).
Drop table did not delete lob files in old file store (not PAGE_STORE).
@changelog_1076_h2
@changelog_1078_h2
Version 1.2.124 (2009-11-20)
Version 1.2.124 (2009-11-20)
@changelog_1077_li
@changelog_1079_li
Clustering: there is now a way to detect which cluster instances are running.
Clustering: there is now a way to detect which cluster instances are running.
@changelog_1078_li
@changelog_1080_li
ConvertTraceFile: the SQL statement statistics are better formatted (newline are removed).
ConvertTraceFile: the SQL statement statistics are better formatted (newline are removed).
@changelog_1079_li
@changelog_1081_li
The file lock thread is now stopped when the database is closed.
The file lock thread is now stopped when the database is closed.
@changelog_1080_li
@changelog_1082_li
Issue 140: the Script tool now supports writing to a stream.
Issue 140: the Script tool now supports writing to a stream.
@changelog_1081_li
@changelog_1083_li
Issue 138: the trace output of Statement.execute(String, int) and executeUpdate was incorrect.
Issue 138: the trace output of Statement.execute(String, int) and executeUpdate was incorrect.
@changelog_1082_li
@changelog_1084_li
Page store: new databases can not be opened with older versions.
Page store: new databases can not be opened with older versions.
@changelog_1083_li
@changelog_1085_li
Page store: multi-column indexes didn't work if the cache was very small.
Page store: multi-column indexes didn't work if the cache was very small.
@changelog_1084_li
@changelog_1086_li
Page store: opening a database could theoretically result in an endless loop.
Page store: opening a database could theoretically result in an endless loop.
@changelog_1085_li
@changelog_1087_li
Page store: adding large indexed columns could get very slow.
Page store: adding large indexed columns could get very slow.
@changelog_1086_li
@changelog_1088_li
Page store: after a duplicate key exception, an ArrayIndexOutOfBoundsException could be thrown (only for very large rows).
Page store: after a duplicate key exception, an ArrayIndexOutOfBoundsException could be thrown (only for very large rows).
@changelog_1087_li
@changelog_1089_li
Page store: the recover tool sometimes generated a script file that contained duplicate data.
Page store: the recover tool sometimes generated a script file that contained duplicate data.
@changelog_1088_li
@changelog_1090_li
Page store: sometimes opening a read-only database failed.
Page store: sometimes opening a read-only database failed.
@changelog_1089_li
@changelog_1091_li
Page store: opening a database sometimes failed if large rows where updated, or if a table was truncated before.
Page store: opening a database sometimes failed if large rows where updated, or if a table was truncated before.
@changelog_1090_li
@changelog_1092_li
Page store: when using a very small page size (128 bytes or smaller), writing a large row could result in an endless recursion. This is only a theoretical problem, as the page size is 2 KB.
Page store: when using a very small page size (128 bytes or smaller), writing a large row could result in an endless recursion. This is only a theoretical problem, as the page size is 2 KB.
@changelog_1091_li
@changelog_1093_li
Page store: getting the min value from a descending index with NULL entries could return the wrong result.
Page store: getting the min value from a descending index with NULL entries could return the wrong result.
@changelog_1092_li
@changelog_1094_li
Page store: improved auto-recovery after power failure.
Page store: improved auto-recovery after power failure.
@changelog_1093_li
@changelog_1095_li
The JDBC client did not detect that it was not talking to an H2 server. This could result in strange exceptions when trying to connect to another kind of server.
The JDBC client did not detect that it was not talking to an H2 server. This could result in strange exceptions when trying to connect to another kind of server.
@changelog_1094_li
@changelog_1096_li
User defined functions can be created with source code. Example: CREATE ALIAS HI AS 'String hi() { return "Hello"; }'
User defined functions can be created with source code. Example: CREATE ALIAS HI AS 'String hi() { return "Hello"; }'
@changelog_1095_li
@changelog_1097_li
Database file lock: the exception "lock file modified in the future" is no longer thrown; instead, opening the file will be delayed by 2 seconds.
Database file lock: the exception "lock file modified in the future" is no longer thrown; instead, opening the file will be delayed by 2 seconds.
@changelog_1096_li
@changelog_1098_li
Inserting LOBs got slower each time the process was restarted. It could loop endlessly after about 1000 process restarts.
Inserting LOBs got slower each time the process was restarted. It could loop endlessly after about 1000 process restarts.
@changelog_1097_li
@changelog_1099_li
Issue 117: Multi-version concurrency: concurrent MERGE statements now work.
Issue 117: Multi-version concurrency: concurrent MERGE statements now work.
@changelog_1098_li
@changelog_1100_li
Improved read-only database detection.
Improved read-only database detection.
@changelog_1099_h2
@changelog_1101_h2
Version 1.2.123 (2009-11-08)
Version 1.2.123 (2009-11-08)
@changelog_1100_li
@changelog_1102_li
Page store: new databases can not be opened with older versions.
Page store: new databases can not be opened with older versions.
@changelog_1101_li
@changelog_1103_li
Page store: updating large rows (rows with more than 2000 bytes of data) could corrupt the database.
Page store: updating large rows (rows with more than 2000 bytes of data) could corrupt the database.
@changelog_1102_li
@changelog_1104_li
Page store: inserting very large rows failed with ArrayIndexOutOfBoundsException.
Page store: inserting very large rows failed with ArrayIndexOutOfBoundsException.
@changelog_1103_li
@changelog_1105_li
When using multi-threaded kernel mode, setting disabling locking (LOCK_MODE=0) will now throw an exception. At this time this combination will result in corruption when multiple threads try to update the same table.
When using multi-threaded kernel mode, setting disabling locking (LOCK_MODE=0) will now throw an exception. At this time this combination will result in corruption when multiple threads try to update the same table.
@changelog_1104_li
@changelog_1106_li
The fulltext search methods and fields are now protected instead of private, to make the classes more easily extensible.
The fulltext search methods and fields are now protected instead of private, to make the classes more easily extensible.
@changelog_1105_li
@changelog_1107_li
The Lucene fulltext search now also returns the score.
The Lucene fulltext search now also returns the score.
@changelog_1106_li
@changelog_1108_li
New function SCOPE_IDENTITY() to avoid problems when inserting rows in a trigger.
New function SCOPE_IDENTITY() to avoid problems when inserting rows in a trigger.
@changelog_1107_li
@changelog_1109_li
Statement.getGeneratedKeys() returned the wrong value if a trigger changed the identity value after inserting the row.
Statement.getGeneratedKeys() returned the wrong value if a trigger changed the identity value after inserting the row.
@changelog_1108_li
@changelog_1110_li
Improved error messages: identifiers and values are now quoted.
Improved error messages: identifiers and values are now quoted.
@changelog_1109_li
@changelog_1111_li
Improved error message when casting a value failed: the column name and type is included in the message.
Improved error message when casting a value failed: the column name and type is included in the message.
@changelog_1110_li
@changelog_1112_li
Improved support for GAE for Java thanks to Vince Bonfanti.
Improved support for GAE for Java thanks to Vince Bonfanti.
@changelog_1111_h2
@changelog_1113_h2
Version 1.2.122 (2009-10-28)
Version 1.2.122 (2009-10-28)
@changelog_1112_li
@changelog_1114_li
The native fulltext search now supports streaming CLOB data.
The native fulltext search now supports streaming CLOB data.
@changelog_1113_li
@changelog_1115_li
If the database URL ends with ;PAGE_STORE=TRUE and a database in the old format exists, it is automatically converted to the new page store format if possible. A backup of the database is created first. Automatic conversion is not supported if the database was not closed normally (if it contains uncommitted transactions).
If the database URL ends with ;PAGE_STORE=TRUE and a database in the old format exists, it is automatically converted to the new page store format if possible. A backup of the database is created first. Automatic conversion is not supported if the database was not closed normally (if it contains uncommitted transactions).
@changelog_1114_li
@changelog_1116_li
Dropping the current user is now allowed if another admin user exists.
Dropping the current user is now allowed if another admin user exists.
@changelog_1115_li
@changelog_1117_li
Values of type BINARY or BLOB could not be converted to the data type OTHER.
Values of type BINARY or BLOB could not be converted to the data type OTHER.
@changelog_1116_li
@changelog_1118_li
SHUTDOWN COMPACT now fully compacts the database.
SHUTDOWN COMPACT now fully compacts the database.
@changelog_1117_li
@changelog_1119_li
New system properties h2.maxCompactCount and h2.maxCompactTime to allow changing the default behavior (at most 2 seconds compacting when closing the database).
New system properties h2.maxCompactCount and h2.maxCompactTime to allow changing the default behavior (at most 2 seconds compacting when closing the database).
@changelog_1118_li
@changelog_1120_li
New sorted insert optimization (see Performance / Database Performance Tuning).
New sorted insert optimization (see Performance / Database Performance Tuning).
@changelog_1119_li
@changelog_1121_li
Issue 116: The files h2*-sources.jar and h2*-javadoc.jar are now in the Maven repository.
Issue 116: The files h2*-sources.jar and h2*-javadoc.jar are now in the Maven repository.
@changelog_1120_li
@changelog_1122_li
Page store: opening a large database was slow if it was not closed before.
Page store: opening a large database was slow if it was not closed before.
@changelog_1121_li
@changelog_1123_li
Page store: new write and read counters in the meta data table. Use SELECT * FROM INFORMATION_SCHEMA.SETTINGS WHERE NAME IN( 'info.FILE_WRITE_TOTAL', 'info.FILE_WRITE', 'info.FILE_READ', 'info.CACHE_MAX_SIZE', 'info.CACHE_SIZE')
Page store: new write and read counters in the meta data table. Use SELECT * FROM INFORMATION_SCHEMA.SETTINGS WHERE NAME IN( 'info.FILE_WRITE_TOTAL', 'info.FILE_WRITE', 'info.FILE_READ', 'info.CACHE_MAX_SIZE', 'info.CACHE_SIZE')
@changelog_1122_li
@changelog_1124_li
The SQL syntax is documented using (railroad) diagrams. The diagrams are HTML.
The SQL syntax is documented using (railroad) diagrams. The diagrams are HTML.
@changelog_1123_li
@changelog_1125_li
The documentation is no longer available in Japanese because the translation was too much out of sync. Please use the Google translation instead.
The documentation is no longer available in Japanese because the translation was too much out of sync. Please use the Google translation instead.
@changelog_1124_li
@changelog_1126_li
Certain queries were not sorted if subselect queries were involved
Certain queries were not sorted if subselect queries were involved
@changelog_1125_li
@changelog_1127_li
More bugs in the server-less multi-connection mode have been fixed: 90097 The database is read only, caches must be cleared on reconnect, etc.
More bugs in the server-less multi-connection mode have been fixed: 90097 The database is read only, caches must be cleared on reconnect, etc.
@changelog_1126_h2
@changelog_1128_h2
Version 1.2.121 (2009-10-11)
Version 1.2.121 (2009-10-11)
@changelog_1127_li
@changelog_1129_li
Better support GaeVFS (Google App Engine Virtual File System) thanks to Thanks to Vince Bonfanti.
Better support GaeVFS (Google App Engine Virtual File System) thanks to Thanks to Vince Bonfanti.
@changelog_1128_li
@changelog_1130_li
CSVREAD didn't close the file. Thanks to Vince Bonfanti for the patch!
CSVREAD didn't close the file. Thanks to Vince Bonfanti for the patch!
@changelog_1129_li
@changelog_1131_li
If a database in the old format exists, it is now used. The system property is used for new databases, or if databases exist in both formats. In any case, the flag in the URL overrides this logic.
If a database in the old format exists, it is now used. The system property is used for new databases, or if databases exist in both formats. In any case, the flag in the URL overrides this logic.
@changelog_1130_li
@changelog_1132_li
Page store bugs were fixed. Large values in indexed columns could corrupt the index.
Page store bugs were fixed. Large values in indexed columns could corrupt the index.
@changelog_1131_li
@changelog_1133_li
The page store did not work when using Retrotranslator (because the Retrotranslator doesn't support Integer.reverse and Long.reverse).
The page store did not work when using Retrotranslator (because the Retrotranslator doesn't support Integer.reverse and Long.reverse).
@changelog_1132_li
@changelog_1134_li
New system property h2.pageStoreTrim to disable shrinking the database when closing (disabled by default, meaning by default the database is trimmed).
New system property h2.pageStoreTrim to disable shrinking the database when closing (disabled by default, meaning by default the database is trimmed).
@changelog_1133_h2
@changelog_1135_h2
Version 1.2.120 (2009-10-04)
Version 1.2.120 (2009-10-04)
@changelog_1134_li
@changelog_1136_li
This is a beta version.
This is a beta version.
@changelog_1135_li
@changelog_1137_li
Large updates could throw an ArrayIndexOutOfBoundsException in RowList.writeRow.
Large updates could throw an ArrayIndexOutOfBoundsException in RowList.writeRow.
@changelog_1136_li
@changelog_1138_li
In version 1.2, the following system properties are now enabled by default: h2.pageStore, h2.nullConcatIsNull, h2.optimizeInList. The default value for h2.defaultMaxLengthInplaceLob is now 4096 (it was 1024 with version 1.1).
In version 1.2, the following system properties are now enabled by default: h2.pageStore, h2.nullConcatIsNull, h2.optimizeInList. The default value for h2.defaultMaxLengthInplaceLob is now 4096 (it was 1024 with version 1.1).
@changelog_1137_li
@changelog_1139_li
New databases are now stored in the new 'page store' file format. Existing databases are kept in the old file format. To use the old file format, append ;PAGE_STORE=FALSE to the database URL or set the system property h2.pageStore to false.
New databases are now stored in the new 'page store' file format. Existing databases are kept in the old file format. To use the old file format, append ;PAGE_STORE=FALSE to the database URL or set the system property h2.pageStore to false.
@changelog_1138_li
@changelog_1140_li
Issue 125: Renaming primary keys was not persistent. Fixed. Unfortunately, databases created by this version can not be opened with older versions because of this change.
Issue 125: Renaming primary keys was not persistent. Fixed. Unfortunately, databases created by this version can not be opened with older versions because of this change.
@changelog_1139_li
@changelog_1141_li
Issue 124: Hibernate schema validation failed for decimal/numeric columns. This problem is fixed in the Hibernate dialect that is included with H2 (src/tools/org/hibernate/dialect/H2Dialect.java.txt), but not in Hibernate yet.
Issue 124: Hibernate schema validation failed for decimal/numeric columns. This problem is fixed in the Hibernate dialect that is included with H2 (src/tools/org/hibernate/dialect/H2Dialect.java.txt), but not in Hibernate yet.
@changelog_1140_li
@changelog_1142_li
PostgreSQL compatibility: function LASTVAL() as an alias for IDENTITY().
PostgreSQL compatibility: function LASTVAL() as an alias for IDENTITY().
@changelog_1141_li
@changelog_1143_li
Linked tables now support default values when inserting, updating or merging.
Linked tables now support default values when inserting, updating or merging.
@changelog_1142_li
@changelog_1144_li
Bugfixes in the page store.
Bugfixes in the page store.
@changelog_1143_li
@changelog_1145_li
Possibility to set a vendor id in Constants.java, so that unofficial builds are distinguishable from official releases.
Possibility to set a vendor id in Constants.java, so that unofficial builds are distinguishable from official releases.
@changelog_1144_li
@changelog_1146_li
Allow writing to linked tables in readonly databases.
Allow writing to linked tables in readonly databases.
@changelog_1145_h2
@changelog_1147_h2
Version 1.1.119 (2009-09-26)
Version 1.1.119 (2009-09-26)
@changelog_1146_li
@changelog_1148_li
SQL statements in the exception message are no longer included if they contain '--hide--'.
SQL statements in the exception message are no longer included if they contain '--hide--'.
@changelog_1147_li
@changelog_1149_li
Temporary local tables did not always work after reconnect if AUTO_SERVER=TRUE
Temporary local tables did not always work after reconnect if AUTO_SERVER=TRUE
@changelog_1148_li
@changelog_1150_li
New system property h2.defaultMaxLengthInplaceLob to change the default maximum size of an in-place LOB object.
New system property h2.defaultMaxLengthInplaceLob to change the default maximum size of an in-place LOB object.
@changelog_1149_li
@changelog_1151_li
New system property h2.nullConcatIsNull to change the default null concatenation behavior. The default will be enabled in version 1.2.
New system property h2.nullConcatIsNull to change the default null concatenation behavior. The default will be enabled in version 1.2.
@changelog_1150_li
@changelog_1152_li
The cache algorithm TQ is disabled in this version, because it is unstable, and because the current implementation does not have any measurable advantages over the default.
The cache algorithm TQ is disabled in this version, because it is unstable, and because the current implementation does not have any measurable advantages over the default.
@changelog_1151_li
@changelog_1153_li
New committer: Christian Peter. He works for <a href="http://www.docware.com">Docware</a> and helped a lot finding and fixing bugs, and generally improving the database. He is now a committer.
New committer: Christian Peter. He works for <a href="http://www.docware.com">Docware</a> and helped a lot finding and fixing bugs, and generally improving the database. He is now a committer.
@changelog_1152_li
@changelog_1154_li
ChangeFileEncryption did not work with Lob subdirectories. Fixed.
ChangeFileEncryption did not work with Lob subdirectories. Fixed.
@changelog_1153_li
@changelog_1155_li
Issue 121: JaQu: new simple update and merge methods.
Issue 121: JaQu: new simple update and merge methods.
@changelog_1154_li
@changelog_1156_li
Issue 120: JaQu didn't close result sets.
Issue 120: JaQu didn't close result sets.
@changelog_1155_li
@changelog_1157_li
Issue 119: JaQu creates wrong WHERE conditions on some inputs.
Issue 119: JaQu creates wrong WHERE conditions on some inputs.
@changelog_1156_li
@changelog_1158_li
The new page store mechanism is now alpha-level quality. The next release will most likely be "1.2.120 beta" where this mode is enabled by default. To use it right now, append ;PAGE_STORE=TRUE to the database URL. The file format of this mode will probably not change any more.
The new page store mechanism is now alpha-level quality. The next release will most likely be "1.2.120 beta" where this mode is enabled by default. To use it right now, append ;PAGE_STORE=TRUE to the database URL. The file format of this mode will probably not change any more.
@changelog_1157_li
@changelog_1159_li
SELECT COUNT(*) FROM SYSTEM_RANGE(...) returned the wrong result. Fixed.
SELECT COUNT(*) FROM SYSTEM_RANGE(...) returned the wrong result. Fixed.
@changelog_1158_li
@changelog_1160_li
The Recover tool now also processes the log files, however applying those changes is still a manual process.
The Recover tool now also processes the log files, however applying those changes is still a manual process.
@changelog_1159_li
@changelog_1161_li
New sample application that shows how to pass data to a trigger.
New sample application that shows how to pass data to a trigger.
@changelog_1160_li
@changelog_1162_li
More bugs in the server-less multi-connection mode have been fixed: On Windows, two processes could write to the same database at the same time.
More bugs in the server-less multi-connection mode have been fixed: On Windows, two processes could write to the same database at the same time.
@changelog_1161_li
@changelog_1163_li
When loading triggers or other client classes (static functions, database event listener, user aggregate functions, other JDBC drivers), the database now uses the context class loader if the class could not be found using Class.forName().
When loading triggers or other client classes (static functions, database event listener, user aggregate functions, other JDBC drivers), the database now uses the context class loader if the class could not be found using Class.forName().
@changelog_1162_li
@changelog_1164_li
Updating many rows with the same CLOB or BLOB values could result in FileNotFoundException.
Updating many rows with the same CLOB or BLOB values could result in FileNotFoundException.
@changelog_1163_li
@changelog_1165_li
Statement.getConnection() threw an exception if the connection was already closed.
Statement.getConnection() threw an exception if the connection was already closed.
@changelog_1164_li
@changelog_1166_li
The native fulltext index kept a reference to a database after the database was closed.
The native fulltext index kept a reference to a database after the database was closed.
@changelog_1165_li
@changelog_1167_li
Non-unique in-memory hash indexes are now supported. Thanks a lot to Sergi Vladykin for the patch!
Non-unique in-memory hash indexes are now supported. Thanks a lot to Sergi Vladykin for the patch!
@changelog_1166_li
@changelog_1168_li
The optimizer does a better job for joins if indexes are missing.
The optimizer does a better job for joins if indexes are missing.
@changelog_1167_h2
@changelog_1169_h2
Version 1.1.118 (2009-09-04)
Version 1.1.118 (2009-09-04)
@changelog_1168_li
@changelog_1170_li
SHOW COLUMNS only listed indexed columns.
SHOW COLUMNS only listed indexed columns.
@changelog_1169_li
@changelog_1171_li
When calling SHUTDOWN IMMEDIATELY in the server mode, the .trace.db file was not closed.
When calling SHUTDOWN IMMEDIATELY in the server mode, the .trace.db file was not closed.
@changelog_1170_li
@changelog_1172_li
DatabaseMetaData.getPrimaryKeys: the wrong constraint name was reported if there was another constraint on the same table and columns.
DatabaseMetaData.getPrimaryKeys: the wrong constraint name was reported if there was another constraint on the same table and columns.
@changelog_1171_li
@changelog_1173_li
AUTO_INCREMENT now works in the same way in ALTER TABLE ALTER COLUMN as in CREATE TABLE (it does not create a primary key).
AUTO_INCREMENT now works in the same way in ALTER TABLE ALTER COLUMN as in CREATE TABLE (it does not create a primary key).
@changelog_1172_li
@changelog_1174_li
Native fulltext search: before searching, FT_INIT() had to be called. This is no longer required.
Native fulltext search: before searching, FT_INIT() had to be called. This is no longer required.
@changelog_1173_li
@changelog_1175_li
Better support GaeVFS (Google App Engine Virtual File System).
Better support GaeVFS (Google App Engine Virtual File System).
@changelog_1174_li
@changelog_1176_li
JaQu: the plan is to support natural (pure Java / Scala) conditions such as (id == 1 && name.equals("Test")). A proof of concept decompiler is now included (it doesn't work yet).
JaQu: the plan is to support natural (pure Java / Scala) conditions such as (id == 1 && name.equals("Test")). A proof of concept decompiler is now included (it doesn't work yet).
@changelog_1175_li
@changelog_1177_li
Various bugfixes and improvements in the page store mechanism (still experimental).
Various bugfixes and improvements in the page store mechanism (still experimental).
@changelog_1176_li
@changelog_1178_li
PreparedStatement.setObject now converts a java.lang.Character to a string.
PreparedStatement.setObject now converts a java.lang.Character to a string.
@changelog_1177_li
@changelog_1179_li
H2 Console: PierPaolo Ucchino has completed the Italian translation. Thanks a lot!
H2 Console: PierPaolo Ucchino has completed the Italian translation. Thanks a lot!
@changelog_1178_li
@changelog_1180_li
Various tools now use Java 5 var-args, such as main the methods and SimpleResultSet.addRow.
Various tools now use Java 5 var-args, such as main the methods and SimpleResultSet.addRow.
@changelog_1179_li
@changelog_1181_li
H2 Console: indexes of tables of non-default schemas are now also listed.
H2 Console: indexes of tables of non-default schemas are now also listed.
@changelog_1180_li
@changelog_1182_li
Issue 111: Multi-version concurrency / duplicate primary key after rollback.
Issue 111: Multi-version concurrency / duplicate primary key after rollback.
@changelog_1181_li
@changelog_1183_li
Issue 110: Multi-version concurrency / wrong exception is thrown.
Issue 110: Multi-version concurrency / wrong exception is thrown.
@changelog_1182_li
@changelog_1184_li
Parser: sequenceName.NEXTVAL and CURRVAL did not respect the schema search path.
Parser: sequenceName.NEXTVAL and CURRVAL did not respect the schema search path.
@changelog_1183_li
@changelog_1185_li
Issue 101: The following sequence could throw the exception "Row not found when trying to delete": start a transaction, insert many rows, delete many rows, rollback. The number of rows depends on the cache size.
Issue 101: The following sequence could throw the exception "Row not found when trying to delete": start a transaction, insert many rows, delete many rows, rollback. The number of rows depends on the cache size.
@changelog_1184_li
@changelog_1186_li
The stack trace of very common exceptions is no longer written to the .trace.db file by default.
The stack trace of very common exceptions is no longer written to the .trace.db file by default.
@changelog_1185_li
@changelog_1187_li
An optimization for OR is implemented, but disabled by default. Expressions of the type X=1 OR X=2 are converted to X IN(1, 2). To enable, set the system property h2.optimizeInList to true before loading the H2 JDBC driver.
An optimization for OR is implemented, but disabled by default. Expressions of the type X=1 OR X=2 are converted to X IN(1, 2). To enable, set the system property h2.optimizeInList to true before loading the H2 JDBC driver.
@changelog_1186_li
@changelog_1188_li
An optimization for IN(..) and IN(SELECT...) is implemented, but disabled by default. To enable, set the system property h2.optimizeInList to true before loading the H2 JDBC driver. If enabled, this overrides h2.optimizeIn and h2.optimizeInJoin. Unlike now, this optimization will also speed up updates and deletes.
An optimization for IN(..) and IN(SELECT...) is implemented, but disabled by default. To enable, set the system property h2.optimizeInList to true before loading the H2 JDBC driver. If enabled, this overrides h2.optimizeIn and h2.optimizeInJoin. Unlike now, this optimization will also speed up updates and deletes.
@changelog_1187_h2
@changelog_1189_h2
Version 1.1.117 (2009-08-09)
Version 1.1.117 (2009-08-09)
@changelog_1188_li
@changelog_1190_li
New committer: Sam Van Oort has been contributing to H2 since quite some time in many ways (on the mailing list, documentation, and in the form of patches). He is now a committer.
New committer: Sam Van Oort has been contributing to H2 since quite some time in many ways (on the mailing list, documentation, and in the form of patches). He is now a committer.
@changelog_1189_li
@changelog_1191_li
JaQu: the order of the fields in the database no longer needs to match the order in the database.
JaQu: the order of the fields in the database no longer needs to match the order in the database.
@changelog_1190_li
@changelog_1192_li
Issue 103: MVCC: the setting MAX_MEMORY_UNDO can currently not be supported when using multi-version concurrency, that means the complete undo log must fit in memory.
Issue 103: MVCC: the setting MAX_MEMORY_UNDO can currently not be supported when using multi-version concurrency, that means the complete undo log must fit in memory.
@changelog_1191_li
@changelog_1193_li
LIKE: the escape mechanism can now be disable using ESCAPE ''. The default escape character can be changed using the system property h2.defaultEscape. The default is still '\' (as in MySQL and PostgreSQL).
LIKE: the escape mechanism can now be disable using ESCAPE ''. The default escape character can be changed using the system property h2.defaultEscape. The default is still '\' (as in MySQL and PostgreSQL).
@changelog_1192_li
@changelog_1194_li
Views using functions were not re-evaluated when necessary.
Views using functions were not re-evaluated when necessary.
@changelog_1193_li
@changelog_1195_li
Improved MySQL compatibility for SHOW COLUMNS.
Improved MySQL compatibility for SHOW COLUMNS.
@changelog_1194_li
@changelog_1196_li
Improved PostgreSQL compatibility for timestamp literals with timezone.
Improved PostgreSQL compatibility for timestamp literals with timezone.
@changelog_1195_li
@changelog_1197_li
Sergi Vladykin translated the error messages to Russian. Thanks a lot!
Sergi Vladykin translated the error messages to Russian. Thanks a lot!
@changelog_1196_li
@changelog_1198_li
Support for Java 6 DatabaseMetaData.getTables, getColumns, getProcedures, and getProcedureColumns.
Support for Java 6 DatabaseMetaData.getTables, getColumns, getProcedures, and getProcedureColumns.
@changelog_1197_li
@changelog_1199_li
Issue 101: Rollback of a large transaction (more than 100000 rows) could fail.
Issue 101: Rollback of a large transaction (more than 100000 rows) could fail.
@changelog_1198_li
@changelog_1200_li
Various bugfixes and improvements in the page store mechanism (still experimental).
Various bugfixes and improvements in the page store mechanism (still experimental).
@changelog_1199_li
@changelog_1201_li
The functions LENGTH, OCTET_LENGTH, and BIT_LENGTH now return BIGINT.
The functions LENGTH, OCTET_LENGTH, and BIT_LENGTH now return BIGINT.
@changelog_1200_li
@changelog_1202_li
Data types CLOB and BLOB: the maximum precision was Integer.MAX_VALUE, it is now Long.MAX_VALUE.
Data types CLOB and BLOB: the maximum precision was Integer.MAX_VALUE, it is now Long.MAX_VALUE.
@changelog_1201_li
@changelog_1203_li
Multi-threaded kernel: creating and dropping temporary database objects and the potentially free pages list was not correctly synchronized. Thanks a lot to Eric Faulhaber for the test case and patch!
Multi-threaded kernel: creating and dropping temporary database objects and the potentially free pages list was not correctly synchronized. Thanks a lot to Eric Faulhaber for the test case and patch!
@changelog_1202_li
@changelog_1204_li
Parsing SQL script files is now faster.
Parsing SQL script files is now faster.
@changelog_1203_li
@changelog_1205_li
CSV reading is now faster.
CSV reading is now faster.
@changelog_1204_li
@changelog_1206_li
SimpleResultSet.newInstance(SimpleRowSource rs) did not work.
SimpleResultSet.newInstance(SimpleRowSource rs) did not work.
@changelog_1205_h2
@changelog_1207_h2
Version 1.1.116 (2009-07-18)
Version 1.1.116 (2009-07-18)
@changelog_1206_li
@changelog_1208_li
Server-less multi-connection mode: more bugs are fixed.
Server-less multi-connection mode: more bugs are fixed.
@changelog_1207_li
@changelog_1209_li
The built-in help (INFORMATION_SCHEMA.HELP) is smaller, shrinking the jar file size a bit.
The built-in help (INFORMATION_SCHEMA.HELP) is smaller, shrinking the jar file size a bit.
@changelog_1208_li
@changelog_1210_li
H2 Console: column of tables of non-default schemas are now also listed, except for schemas starting with 'INFO'.
H2 Console: column of tables of non-default schemas are now also listed, except for schemas starting with 'INFO'.
@changelog_1209_li
@changelog_1211_li
ALTER TABLE: removing an auto-increment or identity column didn't remove the sequence.
ALTER TABLE: removing an auto-increment or identity column didn't remove the sequence.
@changelog_1210_li
@changelog_1212_li
Creating indexes is now a bit faster.
Creating indexes is now a bit faster.
@changelog_1211_li
@changelog_1213_li
PG Server: new system property h2.pgClientEncoding to explicitly set the encoding for clients that don't send the encoding (the default encoding is UTF-8). Thanks a lot to Sergi Vladykin for the patch!
PG Server: new system property h2.pgClientEncoding to explicitly set the encoding for clients that don't send the encoding (the default encoding is UTF-8). Thanks a lot to Sergi Vladykin for the patch!
@changelog_1212_li
@changelog_1214_li
PG Server: improved compatibility by using the type ids of the PostgreSQL driver. Thanks a lot to Sergi Vladykin for the patch!
PG Server: improved compatibility by using the type ids of the PostgreSQL driver. Thanks a lot to Sergi Vladykin for the patch!
@changelog_1213_li
@changelog_1215_li
H2 Console: Oracle system tables are no longer listed, improving performance.
H2 Console: Oracle system tables are no longer listed, improving performance.
@changelog_1214_li
@changelog_1216_li
Result sets are now read-only except if the statement or prepared statement was created with the concurrency ResultSet.CONCUR_UPDATABLE. This change is required because the old behavior (all result set are updatable) violated the JDBC spec. For backward compatibility, use the system property h2.defaultResultSetConcurrency.
Result sets are now read-only except if the statement or prepared statement was created with the concurrency ResultSet.CONCUR_UPDATABLE. This change is required because the old behavior (all result set are updatable) violated the JDBC spec. For backward compatibility, use the system property h2.defaultResultSetConcurrency.
@changelog_1215_li
@changelog_1217_li
New system property h2.defaultResultSetConcurrency to change the default result set concurrency.
New system property h2.defaultResultSetConcurrency to change the default result set concurrency.
@changelog_1216_li
@changelog_1218_li
JDBC: using an invalid result set type or concurrency now throws an exception.
JDBC: using an invalid result set type or concurrency now throws an exception.
@changelog_1217_li
@changelog_1219_li
If a pooled connection was not closed but garbage collected, a NullPointerException could occur.
If a pooled connection was not closed but garbage collected, a NullPointerException could occur.
@changelog_1218_li
@changelog_1220_li
Fulltext search: a NullPointerException was thrown when updating a value that was NULL previously.
Fulltext search: a NullPointerException was thrown when updating a value that was NULL previously.
@changelog_1219_li
@changelog_1221_li
The Recover tool did not work with .data.db files of the wrong size.
The Recover tool did not work with .data.db files of the wrong size.
@changelog_1220_li
@changelog_1222_li
Triggers: if there was an exception when initializing a trigger, this exception could be hidden, and in some cases (specially when using the Lucene fulltext index mechanism) a NullPointerException was thrown later on. Now the exception that occurred on init is thrown when changing data.
Triggers: if there was an exception when initializing a trigger, this exception could be hidden, and in some cases (specially when using the Lucene fulltext index mechanism) a NullPointerException was thrown later on. Now the exception that occurred on init is thrown when changing data.
@changelog_1221_li
@changelog_1223_li
The soft-references cache (CACHE_TYPE=SOFT_LRU) could throw a NullPointerException.
The soft-references cache (CACHE_TYPE=SOFT_LRU) could throw a NullPointerException.
@changelog_1222_li
@changelog_1224_li
To enable the new page store mechanism, append ;PAGE_STORE=TRUE to the database URL. or set the system property h2.pageStore to true. This mechanism is still experimental, and the file format will change, but it is quite stable now.
To enable the new page store mechanism, append ;PAGE_STORE=TRUE to the database URL. or set the system property h2.pageStore to true. This mechanism is still experimental, and the file format will change, but it is quite stable now.
@changelog_1223_h2
@changelog_1225_h2
Version 1.1.115 (2009-06-21)
Version 1.1.115 (2009-06-21)
@changelog_1224_li
@changelog_1226_li
The new storage mechanism is now alpha quality. To try it out, set the system property "h2.pageStore" to "true" (java -Dh2.pageStore=true). There are still bugs to be found and fixed, for example inserting many rows references a lot of main memory. Performance is currently about the same as with the regular storage mechanism, but the database file size is smaller. The file format is not stable yet.
The new storage mechanism is now alpha quality. To try it out, set the system property "h2.pageStore" to "true" (java -Dh2.pageStore=true). There are still bugs to be found and fixed, for example inserting many rows references a lot of main memory. Performance is currently about the same as with the regular storage mechanism, but the database file size is smaller. The file format is not stable yet.
@changelog_1225_li
@changelog_1227_li
ALTER TABLE could throw an exception "object already exists" in some cases.
ALTER TABLE could throw an exception "object already exists" in some cases.
@changelog_1226_li
@changelog_1228_li
Views: in some situations, an ArrayIndexOutOfBoundsException was thrown when using the same view concurrently.
Views: in some situations, an ArrayIndexOutOfBoundsException was thrown when using the same view concurrently.
@changelog_1227_li
@changelog_1229_li
java.util.UUID is now supported in PreparedStatement.setObject and user defined Java functions. ResultSet.getObject() returns a java.util.UUID when using the UUID data type.
java.util.UUID is now supported in PreparedStatement.setObject and user defined Java functions. ResultSet.getObject() returns a java.util.UUID when using the UUID data type.
@changelog_1228_li
@changelog_1230_li
H2 Console: the language was reset to the browser language when disconnecting.
H2 Console: the language was reset to the browser language when disconnecting.
@changelog_1229_li
@changelog_1231_li
H2 Console: improved Polish translation.
H2 Console: improved Polish translation.
@changelog_1230_li
@changelog_1232_li
Server-less multi-connection mode: more bugs are fixed.
Server-less multi-connection mode: more bugs are fixed.
@changelog_1231_li
@changelog_1233_li
The download page now included the SHA1 checksums.
The download page now included the SHA1 checksums.
@changelog_1232_li
@changelog_1234_li
Shell tool: the file encoding workaround is now documented if you run java org.h2.tools.Shell -?.
Shell tool: the file encoding workaround is now documented if you run java org.h2.tools.Shell -?.
@changelog_1233_li
@changelog_1235_li
The RunScript tool and SQL statement did not work with the compression method LZF.
The RunScript tool and SQL statement did not work with the compression method LZF.
@changelog_1234_li
@changelog_1236_li
Fulltext search: searching for NULL or an empty string threw an exception.
Fulltext search: searching for NULL or an empty string threw an exception.
@changelog_1235_li
@changelog_1237_li
Lucene fulltext search: FTL_DROP_ALL did not drop the triggers.
Lucene fulltext search: FTL_DROP_ALL did not drop the triggers.
@changelog_1236_li
@changelog_1238_li
Backup: if the database contained CLOB or BLOB data, the backup included a file entry for the LOB directory. This caused the restore to fail.
Backup: if the database contained CLOB or BLOB data, the backup included a file entry for the LOB directory. This caused the restore to fail.
@changelog_1237_li
@changelog_1239_li
Data types: LONG is now an alias for BIGINT.
Data types: LONG is now an alias for BIGINT.
@changelog_1238_h2
@changelog_1240_h2
Version 1.1.114 (2009-06-01)
Version 1.1.114 (2009-06-01)
@changelog_1239_li
@changelog_1241_li
ResultSetMetaData.getColumnClassName returned the wrong class for CLOB and BLOB columns.
ResultSetMetaData.getColumnClassName returned the wrong class for CLOB and BLOB columns.
@changelog_1240_li
@changelog_1242_li
Fulltext search: data is no longer deleted and re-inserted if the indexed columns didn't change.
Fulltext search: data is no longer deleted and re-inserted if the indexed columns didn't change.
@changelog_1241_li
@changelog_1243_li
In some situations, an ArrayIndexOutOfBoundsException was thrown when adding rows. This was caused by a bug in the b-tree code.
In some situations, an ArrayIndexOutOfBoundsException was thrown when adding rows. This was caused by a bug in the b-tree code.
@changelog_1242_li
@changelog_1244_li
Microsoft Windows Vista: when using the the installer, Vista wrote "This program may not have installed correctly." This message should no longer appear (in the h2.nsi file, the line 'RequestExecutionLevel highest' was added).
Microsoft Windows Vista: when using the the installer, Vista wrote "This program may not have installed correctly." This message should no longer appear (in the h2.nsi file, the line 'RequestExecutionLevel highest' was added).
@changelog_1243_li
@changelog_1245_li
The Recover tool did not always work when the database contains referential integrity constraints.
The Recover tool did not always work when the database contains referential integrity constraints.
@changelog_1244_li
@changelog_1246_li
Java 1.5 is now required to run H2. If required, Retrotranslator can be used to create a Java 1.4 version (http://retrotranslator.sourceforge.net/).
Java 1.5 is now required to run H2. If required, Retrotranslator can be used to create a Java 1.4 version (http://retrotranslator.sourceforge.net/).
@changelog_1245_h2
@changelog_1247_h2
Version 1.1.113 (2009-05-21)
Version 1.1.113 (2009-05-21)
@changelog_1246_li
@changelog_1248_li
Shell tool: the built-in commands EXIT, HELP, ?, LIST, and so on didn't work with a semicolon at the end.
Shell tool: the built-in commands EXIT, HELP, ?, LIST, and so on didn't work with a semicolon at the end.
@changelog_1247_li
@changelog_1249_li
JDK 1.5 is now required to build the jar file. However it is still possible to create a jar file for Java 1.4. For details, see buildRelease.sh and buildRelease.bat. As an alternative, compile using JDK 1.5 or 1.6 and use Retrotranslator to create a Java 1.4 version (http://retrotranslator.sourceforge.net/).
JDK 1.5 is now required to build the jar file. However it is still possible to create a jar file for Java 1.4. For details, see buildRelease.sh and buildRelease.bat. As an alternative, compile using JDK 1.5 or 1.6 and use Retrotranslator to create a Java 1.4 version (http://retrotranslator.sourceforge.net/).
@changelog_1248_li
@changelog_1250_li
When deleting or updating many rows in a table, the space in the index file was not re-used in the default mode (persistent database, b-tree index, LOG=1). This caused the index file to grow over time. Workarounds were to delete and re-created the index file, alter the table (add a remove a column), or append ;LOG=2 to the database URL. To disable the change, set the system property h2.reuseSpaceBtreeIndex to false.
When deleting or updating many rows in a table, the space in the index file was not re-used in the default mode (persistent database, b-tree index, LOG=1). This caused the index file to grow over time. Workarounds were to delete and re-created the index file, alter the table (add a remove a column), or append ;LOG=2 to the database URL. To disable the change, set the system property h2.reuseSpaceBtreeIndex to false.
@changelog_1249_li
@changelog_1251_li
Identifiers with a digit and then a dollar sign didn't work. Example: A1$B.
Identifiers with a digit and then a dollar sign didn't work. Example: A1$B.
@changelog_1250_li
@changelog_1252_li
MS SQL Server compatibility: support for linked tables with NVARCHAR, NCHAR, NCLOB, and LONGNVARCHAR.
MS SQL Server compatibility: support for linked tables with NVARCHAR, NCHAR, NCLOB, and LONGNVARCHAR.
@changelog_1251_li
@changelog_1253_li
Android: workaround for a problem when using read-only databases in zip files (skip seems to be implemented incorrectly on the Android system).
Android: workaround for a problem when using read-only databases in zip files (skip seems to be implemented incorrectly on the Android system).
@changelog_1252_li
@changelog_1254_li
Calling execute() or prepareStatement() with null as the SQL statement now throws an exception.
Calling execute() or prepareStatement() with null as the SQL statement now throws an exception.
@changelog_1253_li
@changelog_1255_li
Benchmark: the number of executed statements was incorrect. The H2 database was loaded at the beginning of the test to collect results, now it is loaded at the very end. Thanks to Fred Toussi from HSQLDB for reporting those problems. However the changed do not affect the relative performance.
Benchmark: the number of executed statements was incorrect. The H2 database was loaded at the beginning of the test to collect results, now it is loaded at the very end. Thanks to Fred Toussi from HSQLDB for reporting those problems. However the changed do not affect the relative performance.
@changelog_1254_li
@changelog_1256_li
H2 Console: command line settings are no longer stored in the properties file. They are now only used for the current process, except if they are explicitly saved.
H2 Console: command line settings are no longer stored in the properties file. They are now only used for the current process, except if they are explicitly saved.
@changelog_1255_li
@changelog_1257_li
Cache: support for a second level soft-references cache. To enable it, append ;CACHE_TYPE=SOFT_LRU (or SOFT_TQ) to the database URL, or set the system property h2.cacheTypeDefault to "SOFT_LRU" / "SOFT_TQ". Enabling the second level cache reduces performance for small databases, but speeds up large databases. It makes sense to use it if the available memory size is unknown. Thanks a lot to Jan Kotek!
Cache: support for a second level soft-references cache. To enable it, append ;CACHE_TYPE=SOFT_LRU (or SOFT_TQ) to the database URL, or set the system property h2.cacheTypeDefault to "SOFT_LRU" / "SOFT_TQ". Enabling the second level cache reduces performance for small databases, but speeds up large databases. It makes sense to use it if the available memory size is unknown. Thanks a lot to Jan Kotek!
@changelog_1256_h2
@changelog_1258_h2
Version 1.1.112 (2009-05-01)
Version 1.1.112 (2009-05-01)
@changelog_1257_li
@changelog_1259_li
JdbcPreparedStatement.toString() could throw a NullPointerException.
JdbcPreparedStatement.toString() could throw a NullPointerException.
@changelog_1258_li
@changelog_1260_li
EclipseLink: added H2Platform.supportsIdentity().
EclipseLink: added H2Platform.supportsIdentity().
@changelog_1259_li
@changelog_1261_li
Connection pool: the default login timeout is now 5 minutes.
Connection pool: the default login timeout is now 5 minutes.
@changelog_1260_li
@changelog_1262_li
After truncating tables, opening large databases could become slow because indexes were always re-built unnecessarily when opening.
After truncating tables, opening large databases could become slow because indexes were always re-built unnecessarily when opening.
@changelog_1261_li
@changelog_1263_li
More bugs in the server-less multi-connection mode have been fixed: Sometimes parameters of prepared statements were lost when a reconnecting. Concurrent read operations were slow. To improve performance, executeQuery(..) must be used for queries (execute(..) switches to the write mode, which is slow).
More bugs in the server-less multi-connection mode have been fixed: Sometimes parameters of prepared statements were lost when a reconnecting. Concurrent read operations were slow. To improve performance, executeQuery(..) must be used for queries (execute(..) switches to the write mode, which is slow).
@changelog_1262_li
@changelog_1264_li
GROUP BY queries with a self-join (join to the same table) that were grouped by columns with indexes returned the wrong result in some cases.
GROUP BY queries with a self-join (join to the same table) that were grouped by columns with indexes returned the wrong result in some cases.
@changelog_1263_li
@changelog_1265_li
Improved error message when the .lock.db file modification time is in the future.
Improved error message when the .lock.db file modification time is in the future.
@changelog_1264_li
@changelog_1266_li
The MERGE statement now returns 0 as the generated key if the row was updated.
The MERGE statement now returns 0 as the generated key if the row was updated.
@changelog_1265_li
@changelog_1267_li
Running code coverage is now automated.
Running code coverage is now automated.
@changelog_1266_li
@changelog_1268_li
A file system implementation can now be registered using FileSystem.register.
A file system implementation can now be registered using FileSystem.register.
@changelog_1267_li
@changelog_1269_li
The database file system is no longer included in the jar file, it moved to the test section.
The database file system is no longer included in the jar file, it moved to the test section.
@changelog_1268_h2
@changelog_1270_h2
Version 1.1.111 (2009-04-10)
Version 1.1.111 (2009-04-10)
@changelog_1269_li
@changelog_1271_li
In-memory databases can now run inside the Google App Engine.
In-memory databases can now run inside the Google App Engine.
@changelog_1270_li
@changelog_1272_li
Queries that are ordered by an indexed column returned no rows in certain cases (if all rows were deleted from the table previously, and there is a low number of rows in the table, and when not using other conditions, and when using the default b tree index).
Queries that are ordered by an indexed column returned no rows in certain cases (if all rows were deleted from the table previously, and there is a low number of rows in the table, and when not using other conditions, and when using the default b tree index).
@changelog_1271_li
@changelog_1273_li
The wrong exception was thrown when using unquoted text for the SQL statements COMMENT, ALTER USER, and SET PASSWORD.
The wrong exception was thrown when using unquoted text for the SQL statements COMMENT, ALTER USER, and SET PASSWORD.
@changelog_1272_li
@changelog_1274_li
The built-in connection pool did not roll back transactions and enable autocommit enabled after closing a connection.
The built-in connection pool did not roll back transactions and enable autocommit enabled after closing a connection.
@changelog_1273_li
@changelog_1275_li
Sometimes a StackOverflow occurred when checking for deadlock. See also http://code.google.com/p/h2database/issues/detail?id=61
Sometimes a StackOverflow occurred when checking for deadlock. See also http://code.google.com/p/h2database/issues/detail?id=61
@changelog_1274_li
@changelog_1276_li
The Shell tool no longer truncates results with only one column, and displays a message if data was truncated.
The Shell tool no longer truncates results with only one column, and displays a message if data was truncated.
@changelog_1275_h2
@changelog_1277_h2
Version 1.1.110 (2009-04-03)
Version 1.1.110 (2009-04-03)
@changelog_1276_li
@changelog_1278_li
Support for not persistent in-memory tables in regular (persistent) databases using CREATE MEMORY TABLE(..) NOT PERSISTENT. Thanks a lot to Sergi Vladykin for the patch!
Support for not persistent in-memory tables in regular (persistent) databases using CREATE MEMORY TABLE(..) NOT PERSISTENT. Thanks a lot to Sergi Vladykin for the patch!
@changelog_1277_li
@changelog_1279_li
The H2 Console trimmed the password (removed leading and trailing spaces). This is no longer the case, to support encrypted H2 database with an empty user password.
The H2 Console trimmed the password (removed leading and trailing spaces). This is no longer the case, to support encrypted H2 database with an empty user password.
@changelog_1278_li
@changelog_1280_li
The data type of a SUBSTRING method was wrong.
The data type of a SUBSTRING method was wrong.
@changelog_1279_li
@changelog_1281_li
ResultSet.findColumn and get methods with column label parameters now also check for matching column names (like most databases except MySQL).
ResultSet.findColumn and get methods with column label parameters now also check for matching column names (like most databases except MySQL).
@changelog_1280_li
@changelog_1282_li
H2 Console: the browser system property now supports a list of arguments. Example: java -Dh2.browser="open,-a,Safari,%url" ...
H2 Console: the browser system property now supports a list of arguments. Example: java -Dh2.browser="open,-a,Safari,%url" ...
@changelog_1281_li
@changelog_1283_li
Improved Javadoc navigation (similar to Scaladoc).
Improved Javadoc navigation (similar to Scaladoc).
@changelog_1282_li
@changelog_1284_li
H2 Console: auto-complete of identifiers did not work correctly for H2 databases in MySQL mode.
H2 Console: auto-complete of identifiers did not work correctly for H2 databases in MySQL mode.
@changelog_1283_li
@changelog_1285_li
DISTINCT and GROUP BY on a CLOB column was broken.
DISTINCT and GROUP BY on a CLOB column was broken.
@changelog_1284_li
@changelog_1286_li
The FTP server moved to the tools section and is no longer included in the h2*.jar file.
The FTP server moved to the tools section and is no longer included in the h2*.jar file.
@changelog_1285_li
@changelog_1287_li
Improved error message for unsupported features: now the message says what exactly is not supported.
Improved error message for unsupported features: now the message says what exactly is not supported.
@changelog_1286_li
@changelog_1288_li
Improved OSGi support.
Improved OSGi support.
@changelog_1287_li
@changelog_1289_li
Some internal caches did not use the LRU mechanism. Fixed (LOB file list, optimizer cost cache, trace system, view indexes, collection keys, compressed in-memory file system).
Some internal caches did not use the LRU mechanism. Fixed (LOB file list, optimizer cost cache, trace system, view indexes, collection keys, compressed in-memory file system).
@changelog_1288_li
@changelog_1290_li
The API of the tools changed a bit (each tool now returns an exit code).
The API of the tools changed a bit (each tool now returns an exit code).
@changelog_1289_li
@changelog_1291_li
Command line help of the tools now match the javadocs. The build converts the javadocs to a resource that is read by the tool at runtime. This should not have an effect on using the database, but it reduces duplicate and out-of-sync documentation.
Command line help of the tools now match the javadocs. The build converts the javadocs to a resource that is read by the tool at runtime. This should not have an effect on using the database, but it reduces duplicate and out-of-sync documentation.
@changelog_1290_li
@changelog_1292_li
CREATE TABLE: improved compatibility (support for UNIQUE NOT NULL).
CREATE TABLE: improved compatibility (support for UNIQUE NOT NULL).
@changelog_1291_li
@changelog_1293_li
DatabaseMetaData.getSQLKeywords now returns the correct list.
DatabaseMetaData.getSQLKeywords now returns the correct list.
@changelog_1292_li
@changelog_1294_li
Deterministic user defined functions did not work when the parameter was a column. Fixed.
Deterministic user defined functions did not work when the parameter was a column. Fixed.
@changelog_1293_li
@changelog_1295_li
JdbcConnectionPool.setLoginTimeout with 0 now uses the default timeout.
JdbcConnectionPool.setLoginTimeout with 0 now uses the default timeout.
@changelog_1294_li
@changelog_1296_li
Creating a JdbcConnectionPool has been simplified a bit.
Creating a JdbcConnectionPool has been simplified a bit.
@changelog_1295_li
@changelog_1297_li
The built-in connection pool did not re-use connections. Getting a connection using the built-in JdbcConnectionPool is now about 70 times faster than opening connections using DriverManager.getConnection.
The built-in connection pool did not re-use connections. Getting a connection using the built-in JdbcConnectionPool is now about 70 times faster than opening connections using DriverManager.getConnection.
@changelog_1296_li
@changelog_1298_li
More bugs in the server-less multi-connection mode have been fixed: If a process terminated while writing, other open connections were blocked. If two processes were writing to the database, sometimes the database was corrupt after closing.
More bugs in the server-less multi-connection mode have been fixed: If a process terminated while writing, other open connections were blocked. If two processes were writing to the database, sometimes the database was corrupt after closing.
@changelog_1297_li
@changelog_1299_li
Linked tables to SQLite database can now be created.
Linked tables to SQLite database can now be created.
@changelog_1298_li
@changelog_1300_li
Nested IN(IN(...)) didn't work.
Nested IN(IN(...)) didn't work.
@changelog_1299_li
@changelog_1301_li
NIO storage: the nio: prefix was using memory mapped files instead of FileChannel.
NIO storage: the nio: prefix was using memory mapped files instead of FileChannel.
@changelog_1300_h2
@changelog_1302_h2
Version 1.1.109 (2009-03-14)
Version 1.1.109 (2009-03-14)
@changelog_1301_li
@changelog_1303_li
The optimization for IN(...) is now only used if comparing a column with an index.
The optimization for IN(...) is now only used if comparing a column with an index.
@changelog_1302_li
@changelog_1304_li
User defined functions can now be deterministic (see CREATE ALIAS documentation).
User defined functions can now be deterministic (see CREATE ALIAS documentation).
@changelog_1303_li
@changelog_1305_li
Multiple nested queries in the FROM clause with parameters did not always work.
Multiple nested queries in the FROM clause with parameters did not always work.
@changelog_1304_li
@changelog_1306_li
When converting CLOB to BINARY, each character resulted in one byte. Now, the text is parsed as a hex as when converting VARCHAR.
When converting CLOB to BINARY, each character resulted in one byte. Now, the text is parsed as a hex as when converting VARCHAR.
@changelog_1305_li
@changelog_1307_li
New experimental NIO storage mechanism with both FileChannel and memory mapped files. To use it, use the file name prefix nio: or nioMapped: as in jdbc:h2:nio:~/test. So far it looks like NIO storage is faster on Mac OS but slower on some Windows systems. Thanks a lot to Jan Kotek for the patch!
New experimental NIO storage mechanism with both FileChannel and memory mapped files. To use it, use the file name prefix nio: or nioMapped: as in jdbc:h2:nio:~/test. So far it looks like NIO storage is faster on Mac OS but slower on some Windows systems. Thanks a lot to Jan Kotek for the patch!
@changelog_1306_li
@changelog_1308_li
The functions BITOR, BITAND, BITXOR, and MOD now accept and return BIGINT instead of INT.
The functions BITOR, BITAND, BITXOR, and MOD now accept and return BIGINT instead of INT.
@changelog_1307_li
@changelog_1309_li
Could not use the same linked table multiple times in the same query.
Could not use the same linked table multiple times in the same query.
@changelog_1308_li
@changelog_1310_li
Bugs in the server-less multi-connection mode have been fixed.
Bugs in the server-less multi-connection mode have been fixed.
@changelog_1309_li
@changelog_1311_li
Column names could not be named "UNIQUE" (with the quotes).
Column names could not be named "UNIQUE" (with the quotes).
@changelog_1310_li
@changelog_1312_li
New system function TRANSACTION_ID() to get the current transaction identifier for a session.
New system function TRANSACTION_ID() to get the current transaction identifier for a session.
@changelog_1311_h2
@changelog_1313_h2
Version 1.1.108 (2009-02-28)
Version 1.1.108 (2009-02-28)
@changelog_1312_li
@changelog_1314_li
When the shutdown hook closed the database, the last log file was deleted too early. This could cause uncommitted changes to be persisted. In some cases, this could cause data corruption.
When the shutdown hook closed the database, the last log file was deleted too early. This could cause uncommitted changes to be persisted. In some cases, this could cause data corruption.
@changelog_1313_li
@changelog_1315_li
JdbcConnectionPool: it was possible to set a negative connection pool size.
JdbcConnectionPool: it was possible to set a negative connection pool size.
@changelog_1314_li
@changelog_1316_li
Fulltext search did not support table names with a backslash.
Fulltext search did not support table names with a backslash.
@changelog_1315_li
@changelog_1317_li
The internal IntArray class did not work correctly when initialized with a zero length array.
The internal IntArray class did not work correctly when initialized with a zero length array.
@changelog_1316_li
@changelog_1318_li
The H2 Console web application (war file) did only support ASCII characters. Now UTF-8 is supported.
The H2 Console web application (war file) did only support ASCII characters. Now UTF-8 is supported.
@changelog_1317_li
@changelog_1319_li
DATEADD does no longer require that the argument is a timestamp.
DATEADD does no longer require that the argument is a timestamp.
@changelog_1318_li
@changelog_1320_li
The database file locking mechanism didn't work correctly on Mac OS.
The database file locking mechanism didn't work correctly on Mac OS.
@changelog_1319_li
@changelog_1321_li
Some built-in functions reported the wrong precision, scale, and display size.
Some built-in functions reported the wrong precision, scale, and display size.
@changelog_1320_li
@changelog_1322_li
MySQL compatibility for CREATE TABLE is improved (UNSIGNED, KEY).
MySQL compatibility for CREATE TABLE is improved (UNSIGNED, KEY).
@changelog_1321_li
@changelog_1323_li
Recovery did not work if there were more than 255 lobs stored as files.
Recovery did not work if there were more than 255 lobs stored as files.
@changelog_1322_li
@changelog_1324_li
New experimental mode to support multiple read-write connections without starting a server. To enable this mode, append ;FILE_LOCK=SERIALIZED;OPEN_NEW=TRUE to the database URL. Don't expect high performance when multiple concurrent writers.
New experimental mode to support multiple read-write connections without starting a server. To enable this mode, append ;FILE_LOCK=SERIALIZED;OPEN_NEW=TRUE to the database URL. Don't expect high performance when multiple concurrent writers.
@changelog_1323_li
@changelog_1325_li
In a web application, the database classes are not unloaded if a connection is open. This may cause out of memory when re-deploying a web application. The DbStarter is changed to close all connections to the configured database (by executing SHUTDOWN).
In a web application, the database classes are not unloaded if a connection is open. This may cause out of memory when re-deploying a web application. The DbStarter is changed to close all connections to the configured database (by executing SHUTDOWN).
@changelog_1324_li
@changelog_1326_li
The WebServlet did not close the database when un-deploying the web application.
The WebServlet did not close the database when un-deploying the web application.
@changelog_1325_li
@changelog_1327_li
The exception message of failed INSERT or MERGE statements now includes all values and the row number.
The exception message of failed INSERT or MERGE statements now includes all values and the row number.
@changelog_1326_li
@changelog_1328_li
If opening a database failed with an out of memory exception, some files were not closed.
If opening a database failed with an out of memory exception, some files were not closed.
@changelog_1327_li
@changelog_1329_li
Optimizer: the expected runtime calculation was incorrect. The fixed calculation should give slightly better query plans when using many joins.
Optimizer: the expected runtime calculation was incorrect. The fixed calculation should give slightly better query plans when using many joins.
@changelog_1328_li
@changelog_1330_li
Improved exception message when connecting to a just started server fails.
Improved exception message when connecting to a just started server fails.
@changelog_1329_li
@changelog_1331_li
Connection.isValid is a bit faster.
Connection.isValid is a bit faster.
@changelog_1330_li
@changelog_1332_li
H2 Console: the autocomplete feature has been improved a bit. It can now better parse conditions.
H2 Console: the autocomplete feature has been improved a bit. It can now better parse conditions.
@changelog_1331_li
@changelog_1333_li
When restarting a web application in Tomcat, an exception was thrown sometimes. In most cases this was a NullPointerException. A workaround in H2 has been implemented. The root cause of the problem is now documented in the FAQ: Tomcat sets all static fields (final or non-final) to null when unloading a web application. A workaround is to put the h2.jar in the lib directory, or set the system property org.apache.catalina.loader.WebappClassLoader.ENABLE_CLEAR_REFERENCES to false.
When restarting a web application in Tomcat, an exception was thrown sometimes. In most cases this was a NullPointerException. A workaround in H2 has been implemented. The root cause of the problem is now documented in the FAQ: Tomcat sets all static fields (final or non-final) to null when unloading a web application. A workaround is to put the h2.jar in the lib directory, or set the system property org.apache.catalina.loader.WebappClassLoader.ENABLE_CLEAR_REFERENCES to false.
@changelog_1332_h2
@changelog_1334_h2
Version 1.1.107 (2009-01-24)
Version 1.1.107 (2009-01-24)
@changelog_1333_li
@changelog_1335_li
Some DatabaseMetaData operations did not work for non-admin users for versions 1.1.x.
Some DatabaseMetaData operations did not work for non-admin users for versions 1.1.x.
@changelog_1334_li
@changelog_1336_li
The MySQL compatibility extension fromUnixTime now used the English locale.
The MySQL compatibility extension fromUnixTime now used the English locale.
@changelog_1335_li
@changelog_1337_li
When using LOG=2 and repeatedly updating the last row rows of a table, the index file grew quickly.
When using LOG=2 and repeatedly updating the last row rows of a table, the index file grew quickly.
@changelog_1336_li
@changelog_1338_li
In versions 1.1.105 and 1.1.106, encrypted script files of earlier versions could not be processed. This is now again possible. The problem was that such script files were stored in a special format (STORAGE=TEXT) but support for this format was removed in version 1.1.105.
In versions 1.1.105 and 1.1.106, encrypted script files of earlier versions could not be processed. This is now again possible. The problem was that such script files were stored in a special format (STORAGE=TEXT) but support for this format was removed in version 1.1.105.
@changelog_1337_li
@changelog_1339_li
Enabling the trace mechanism by creating a specially named file is no longer supported.
Enabling the trace mechanism by creating a specially named file is no longer supported.
@changelog_1338_h2
@changelog_1340_h2
Version 1.1.106 (2009-01-04)
Version 1.1.106 (2009-01-04)
@changelog_1339_li
@changelog_1341_li
Statement.setQueryTimeout did not work correctly for some statements.
Statement.setQueryTimeout did not work correctly for some statements.
@changelog_1340_li
@changelog_1342_li
CREATE DOMAIN: built-in data types can now only be changed if no tables exist.
CREATE DOMAIN: built-in data types can now only be changed if no tables exist.
@changelog_1341_li
@changelog_1343_li
Linked tables: a workaround for Oracle DATE columns has been implemented.
Linked tables: a workaround for Oracle DATE columns has been implemented.
@changelog_1342_li
@changelog_1344_li
DatabaseMetaData.getPrimaryKeys: the column PK_NAME now contains the constraint name instead of the index name (compatibility for PostgreSQL and Derby).
DatabaseMetaData.getPrimaryKeys: the column PK_NAME now contains the constraint name instead of the index name (compatibility for PostgreSQL and Derby).
@changelog_1343_li
@changelog_1345_li
Using IN(..) inside a IN(SELECT..) did not always work.
Using IN(..) inside a IN(SELECT..) did not always work.
@changelog_1344_li
@changelog_1346_li
Views with IN(..) that used a view itself did not work.
Views with IN(..) that used a view itself did not work.
@changelog_1345_li
@changelog_1347_li
Union queries with LIMIT or ORDER BY that are used in a view or subquery did not work.
Union queries with LIMIT or ORDER BY that are used in a view or subquery did not work.
@changelog_1346_li
@changelog_1348_li
The license change a bit: so far the license was modified to say 'Swiss law'. This is now changed back to the original 'US law'. This was requested by a user, and I don't see a problem.
The license change a bit: so far the license was modified to say 'Swiss law'. This is now changed back to the original 'US law'. This was requested by a user, and I don't see a problem.
@changelog_1347_li
@changelog_1349_li
Constraints for local temporary tables now session scoped. So far they were global. Thanks a lot to Eric Faulhaber for finding and fixing this problem!
Constraints for local temporary tables now session scoped. So far they were global. Thanks a lot to Eric Faulhaber for finding and fixing this problem!
@changelog_1348_li
@changelog_1350_li
When using the auto-server mode, and if the lock file was modified in the future, the wrong exception was thrown ('Connection is broken' instead of 'Error opening database: lock file modified in the future').
When using the auto-server mode, and if the lock file was modified in the future, the wrong exception was thrown ('Connection is broken' instead of 'Error opening database: lock file modified in the future').
@cheatSheet_1000_h1
@cheatSheet_1000_h1
...
@@ -4694,7 +4703,7 @@ Compacting a Database
...
@@ -4694,7 +4703,7 @@ Compacting a Database
Cache Settings
Cache Settings
@features_1614_p
@features_1614_p
The database keeps most frequently used data and index pages in the main memory. The amount of memory used for caching can be changed using the setting <code>CACHE_SIZE</code>. This setting can be set in the database connection URL (<code>jdbc:h2:~/test;CACHE_SIZE=131072</code>), or it can be changed at runtime using <code>SET CACHE_SIZE size</code>.
The database keeps most frequently used data and index pages in the main memory. The amount of memory used for caching can be changed using the setting <code>CACHE_SIZE</code>. This setting can be set in the database connection URL (<code>jdbc:h2:~/test;CACHE_SIZE=131072</code>), or it can be changed at runtime using <code>SET CACHE_SIZE size</code>. This setting has no effect for in-memory databases.
@features_1615_p
@features_1615_p
Also included is an experimental second level soft reference cache. Rows in this cache are only garbage collected on low memory. By default the second level cache is disabled. To enable it, use the prefix <code>SOFT_</code>. Example: <code>jdbc:h2:~/test;CACHE_TYPE=SOFT_LRU</code>. The cache might not actually improve performance. If you plan to use it, please run your own test cases first.
Also included is an experimental second level soft reference cache. Rows in this cache are only garbage collected on low memory. By default the second level cache is disabled. To enable it, use the prefix <code>SOFT_</code>. Example: <code>jdbc:h2:~/test;CACHE_TYPE=SOFT_LRU</code>. The cache might not actually improve performance. If you plan to use it, please run your own test cases first.
...
@@ -9517,13 +9526,16 @@ Support TRUNCATE for linked tables.
...
@@ -9517,13 +9526,16 @@ Support TRUNCATE for linked tables.
@roadmap_1437_li
@roadmap_1437_li
UNION: evaluate INTERSECT before UNION (like most other database except Oracle).
UNION: evaluate INTERSECT before UNION (like most other database except Oracle).
@roadmap_1438_h2
@roadmap_1438_li
Delay creating the information schema, and share metadata columns.
@roadmap_1439_h2
Not Planned
Not Planned
@roadmap_1439_li
@roadmap_1440_li
HSQLDB (did) support this: select id i from test where i<0 (other databases don't). Supporting it may break compatibility.
HSQLDB (did) support this: select id i from test where i<0 (other databases don't). Supporting it may break compatibility.
@roadmap_1440_li
@roadmap_1441_li
String.intern (so that Strings can be compared with ==) will not be used because some VMs have problems when used extensively.
String.intern (so that Strings can be compared with ==) will not be used because some VMs have problems when used extensively.
# When a user tries to connect to a database, the combination of user name, @, and password are hashed using SHA-256, and this hash value is transmitted to the database. This step does not protect against an attacker that re-uses the value if he is able to listen to the (unencrypted) transmission between the client and the server. But, the passwords are never transmitted as plain text, even when using an unencrypted connection between client and server. That means if a user reuses the same password for different things, this password is still protected up to some point. See also 'RFC 2617 - HTTP Authentication: Basic and Digest Access Authentication' for more information.
# When a user tries to connect to a database, the combination of user name, @, and password are hashed using SHA-256, and this hash value is transmitted to the database. This step does not protect against an attacker that re-uses the value if he is able to listen to the (unencrypted) transmission between the client and the server. But, the passwords are never transmitted as plain text, even when using an unencrypted connection between client and server. That means if a user reuses the same password for different things, this password is still protected up to some point. See also 'RFC 2617 - HTTP Authentication: Basic and Digest Access Authentication' for more information.
@advanced_1276_p
@advanced_1276_p
# When a new database or user is created, a new cryptographically secure random salt value is generated. The size of the salt is 64 bits. Using the random salt reduces the risk of an attacker pre-calculating hash values for many different (commonly used) passwords.
# When a new database or user is created, a new random salt value is generated. The size of the salt is 64 bits. Using the random salt reduces the risk of an attacker pre-calculating hash values for many different (commonly used) passwords.
@advanced_1277_p
@advanced_1277_p
# The combination of user-password hash value (see above) and salt is hashed using SHA-256. The resulting value is stored in the database. When a user tries to connect to the database, the database combines user-password hash value with the stored salt value and calculates the hash value. Other products use multiple iterations (hash the hash value again and again), but this is not done in this product to reduce the risk of denial of service attacks (where the attacker tries to connect with bogus passwords, and the server spends a lot of time calculating the hash value for each password). The reasoning is: if the attacker has access to the hashed passwords, he also has access to the data in plain text, and therefore does not need the password any more. If the data is protected by storing it on another computer and only accessible remotely, then the iteration count is not required at all.
# The combination of user-password hash value (see above) and salt is hashed using SHA-256. The resulting value is stored in the database. When a user tries to connect to the database, the database combines user-password hash value with the stored salt value and calculates the hash value. Other products use multiple iterations (hash the hash value again and again), but this is not done in this product to reduce the risk of denial of service attacks (where the attacker tries to connect with bogus passwords, and the server spends a lot of time calculating the hash value for each password). The reasoning is: if the attacker has access to the hashed passwords, he also has access to the data in plain text, and therefore does not need the password any more. If the data is protected by storing it on another computer and only accessible remotely, then the iteration count is not required at all.
...
@@ -1349,45 +1349,48 @@ Centralリポジトリの利用
...
@@ -1349,45 +1349,48 @@ Centralリポジトリの利用
#Google Group versus issue tracking: Use the <a href="http://groups.google.com/group/h2-database">Google Group</a> for questions or if you are not sure it's a bug. If you are sure it's a bug, you can create an <a href="http://code.google.com/p/h2database/issues/list">issue</a>, but you don't need to (sending an email to the group is enough). Please note that only few people monitor the issue tracking system.
#Google Group versus issue tracking: Use the <a href="http://groups.google.com/group/h2-database">Google Group</a> for questions or if you are not sure it's a bug. If you are sure it's a bug, you can create an <a href="http://code.google.com/p/h2database/issues/list">issue</a>, but you don't need to (sending an email to the group is enough). Please note that only few people monitor the issue tracking system.
@build_1082_li
@build_1082_li
#For out-of-memory problems, please analyze the problem yourself first, for example using the command line option <code>-XX:+HeapDumpOnOutOfMemoryError</code> and a memory analysis tool such as the <a href="http://www.eclipse.org/mat">Eclipse Memory Analyzer (MAT)</a>.
@build_1083_li
#It may take a few days to get an answers. Please do not double post.
#It may take a few days to get an answers. Please do not double post.
@build_1083_h2
@build_1084_h2
#Automated Build
#Automated Build
@build_1084_p
@build_1085_p
# This build process is automated and runs regularly. The build process includes running the tests and code coverage, using the command line <code>./build.sh clean jar coverage -Dh2.ftpPassword=... uploadBuild</code>. The last results are available here:
# This build process is automated and runs regularly. The build process includes running the tests and code coverage, using the command line <code>./build.sh clean jar coverage -Dh2.ftpPassword=... uploadBuild</code>. The last results are available here:
@build_1085_a
@build_1086_a
#Test Output
#Test Output
@build_1086_a
@build_1087_a
#Code Coverage Summary
#Code Coverage Summary
@build_1087_a
@build_1088_a
#Code Coverage Details (download, 1.3 MB)
#Code Coverage Details (download, 1.3 MB)
@build_1088_a
@build_1089_a
#Build Newsfeed
#Build Newsfeed
@build_1089_a
@build_1090_a
#Latest Jar File (download, 1 MB)
#Latest Jar File (download, 1 MB)
@build_1090_h2
@build_1091_h2
#Generating Railroad Diagrams
#Generating Railroad Diagrams
@build_1091_p
@build_1092_p
# The railroad diagrams are HTML, formatted as nested tables. The diagrams are generated as follows:
# The railroad diagrams are HTML, formatted as nested tables. The diagrams are generated as follows:
@build_1092_li
@build_1093_li
#The BNF parser (<code>org.h2.bnf.Bnf</code>) reads and parses the BNF from the file <code>help.csv</code>.
#The BNF parser (<code>org.h2.bnf.Bnf</code>) reads and parses the BNF from the file <code>help.csv</code>.
@build_1093_li
@build_1094_li
#The page parser (<code>org.h2.server.web.PageParser</code>) reads the template HTML file and fills in the diagrams.
#The page parser (<code>org.h2.server.web.PageParser</code>) reads the template HTML file and fills in the diagrams.
@build_1094_li
@build_1095_li
#The rail images (one straight, four junctions, two turns) are generated using a simple Java application.
#The rail images (one straight, four junctions, two turns) are generated using a simple Java application.
@build_1095_p
@build_1096_p
# To generate railroad diagrams for other grammars, see the package <code>org.h2.jcr</code>. This package is used to generate the SQL-2 railroad diagrams for the JCR 2.0 specification.
# To generate railroad diagrams for other grammars, see the package <code>org.h2.jcr</code>. This package is used to generate the SQL-2 railroad diagrams for the JCR 2.0 specification.
@changelog_1000_h1
@changelog_1000_h1
...
@@ -1397,1044 +1400,1050 @@ Centralリポジトリの利用
...
@@ -1397,1044 +1400,1050 @@ Centralリポジトリの利用
#Next Version (unreleased)
#Next Version (unreleased)
@changelog_1002_li
@changelog_1002_li
#Nested UNION/INTERSECT queries with brackets could produce the wrong result if used within a subquery. Example: select count(*) from (select 1 union (select 2 intersect select 2)) x;
#If the database was already closed using SHUTDOWN IMMEDIATELY, closing a second connection could throw a NullPointerException if there was a local temporary table.
@changelog_1003_li
@changelog_1003_li
#Comparing an column against a constant expression with a higher precision or length than the column could give wrong results (the expression was truncated before comparing).
#Less classes are loaded when using the database in embedded mode.
@changelog_1004_li
@changelog_1004_li
#Improved PostgreSQL compatibility (support SHOW DEFAULT_TRANSACTION_ISOLATION).
#Nested UNION/INTERSECT queries with brackets could produce the wrong result if used within a subquery. Example: select count(*) from (select 1 union (select 2 intersect select 2)) x;
@changelog_1005_li
@changelog_1005_li
#Documentation: the javadocs for Csv.write and read used the wrong default charset.
#Comparing an column against a constant expression with a higher precision or length than the column could give wrong results (the expression was truncated before comparing).
@changelog_1006_li
@changelog_1006_li
#MVCC: if the table was locked in exclusive mode (such as SELECT ... FOR UPDATE), another session could query the table. This is now longer possible.
#Improved PostgreSQL compatibility (support SHOW DEFAULT_TRANSACTION_ISOLATION).
@changelog_1007_li
@changelog_1007_li
#If a FOR UPDATE query was executed twice (using a PreparedStatement), the table was not locked.
#Documentation: the javadocs for Csv.write and read used the wrong default charset.
@changelog_1008_li
@changelog_1008_li
#Triggers: INSTEAD OF triggers are now supported. Such triggers can be defined on views.
#MVCC: if the table was locked in exclusive mode (such as SELECT ... FOR UPDATE), another session could query the table. This is now longer possible.
@changelog_1009_li
@changelog_1009_li
#MVCC: if the page store is disabled, rollback of multiple rows with the same index key did not work correctly.
#If a FOR UPDATE query was executed twice (using a PreparedStatement), the table was not locked.
@changelog_1010_li
@changelog_1010_li
#New system property h2.identifiersToUpper. If set to false, identifiers in SQL statements are case sensitive even if they are not quoted.
#Triggers: INSTEAD OF triggers are now supported. Such triggers can be defined on views.
@changelog_1011_li
@changelog_1011_li
#Slightly improved performance if the table is already locked.
#MVCC: if the page store is disabled, rollback of multiple rows with the same index key did not work correctly.
@changelog_1012_li
@changelog_1012_li
#CompressLZF: faster decompression.
#New system property h2.identifiersToUpper. If set to false, identifiers in SQL statements are case sensitive even if they are not quoted.
@changelog_1013_li
@changelog_1013_li
#PgServer: the wrong size was sent for VARCHAR data. Thanks again to Sergi Vladykin for the patch.
#Slightly improved performance if the table is already locked.
@changelog_1014_li
@changelog_1014_li
#CompressLZF: faster decompression.
@changelog_1015_li
#PgServer: the wrong size was sent for VARCHAR data. Thanks again to Sergi Vladykin for the patch.
@changelog_1016_li
#Serialized access mode (server-less multi-connection mode): fixed getGeneratedKeys() for sequences.
#Serialized access mode (server-less multi-connection mode): fixed getGeneratedKeys() for sequences.
@changelog_1015_h2
@changelog_1017_h2
#Version 1.2.127 (2010-01-15)
#Version 1.2.127 (2010-01-15)
@changelog_1016_li
@changelog_1018_li
#Serialized access mode (server-less multi-connection mode): sequences did not work as expected (there were gaps in generated values when using multiple connections).
#Serialized access mode (server-less multi-connection mode): sequences did not work as expected (there were gaps in generated values when using multiple connections).
@changelog_1017_li
@changelog_1019_li
#Page store: new databases can not be opened with older versions.
#Page store: new databases can not be opened with older versions.
@changelog_1018_li
@changelog_1020_li
#Page store: adding data to new database is now faster.
#Page store: adding data to new database is now faster.
@changelog_1019_li
@changelog_1021_li
#File system: getting the file name from a path is now faster. This should speed up BLOB and CLOB access.
#File system: getting the file name from a path is now faster. This should speed up BLOB and CLOB access.
@changelog_1020_li
@changelog_1022_li
#PgServer: incorrect SQL types were returned in result set meta data. Concurrently opening a database could fail (PG catalog initialization was not synchronized). Thanks a lot to Sergi Vladykin for providing the patches!
#PgServer: incorrect SQL types were returned in result set meta data. Concurrently opening a database could fail (PG catalog initialization was not synchronized). Thanks a lot to Sergi Vladykin for providing the patches!
@changelog_1021_li
@changelog_1023_li
#SHOW COLUMNS did not work correctly if there where multiple indexes on the same columns.
#SHOW COLUMNS did not work correctly if there where multiple indexes on the same columns.
@changelog_1022_li
@changelog_1024_li
#Page store: the wrong write count was written to the database header. This could cause the server-less multi-connection mode to fail.
#Page store: the wrong write count was written to the database header. This could cause the server-less multi-connection mode to fail.
@changelog_1023_li
@changelog_1025_li
#Result sets larger than 2 GB threw an exception "Negative seek offset". Fixed.
#Result sets larger than 2 GB threw an exception "Negative seek offset". Fixed.
@changelog_1024_li
@changelog_1026_li
#If the system property h2.check was set to false, an ArrayIndexOutOfBoundsException could occur.
#If the system property h2.check was set to false, an ArrayIndexOutOfBoundsException could occur.
@changelog_1025_li
@changelog_1027_li
#Alter table is now supported even if a table has views defined.
#Alter table is now supported even if a table has views defined.
@changelog_1026_li
@changelog_1028_li
#Fulltext search: exceptions within the fulltext search package had the wrong SQL state.
#Fulltext search: exceptions within the fulltext search package had the wrong SQL state.
@changelog_1027_li
@changelog_1029_li
#The Lucene fulltext search ignored transaction rollback. Fixed using a trigger on rollback.
#The Lucene fulltext search ignored transaction rollback. Fixed using a trigger on rollback.
@changelog_1028_li
@changelog_1030_li
#Trigger can now be called on rollback.
#Trigger can now be called on rollback.
@changelog_1029_li
@changelog_1031_li
#The shell script h2.sh ignored command line line arguments.
#The shell script h2.sh ignored command line line arguments.
@changelog_1030_li
@changelog_1032_li
#When running H2 in the Google AppEngine for Java, a AccessControlException could be thrown when trying to open a read-only database. Fixed.
#When running H2 in the Google AppEngine for Java, a AccessControlException could be thrown when trying to open a read-only database. Fixed.
@changelog_1031_li
@changelog_1033_li
#The user home directory prefix (~) is now only expanded when followed by a slash or backslash, or standing alone.
#The user home directory prefix (~) is now only expanded when followed by a slash or backslash, or standing alone.
@changelog_1032_li
@changelog_1034_li
#Native fulltext search: before inserting or deleting data, FT_INIT() had to be called. This is no longer required.
#Native fulltext search: before inserting or deleting data, FT_INIT() had to be called. This is no longer required.
@changelog_1033_li
@changelog_1035_li
#The .trace.db file is now only created if required.
#The .trace.db file is now only created if required.
@changelog_1034_li
@changelog_1036_li
#Shell tool: improved PostgreSQL compatibility.
#Shell tool: improved PostgreSQL compatibility.
@changelog_1035_li
@changelog_1037_li
#Trying to open a database in read-only mode when a .lock.db file exists will now fail with a nice error message.
#Trying to open a database in read-only mode when a .lock.db file exists will now fail with a nice error message.
@changelog_1036_li
@changelog_1038_li
#H2 Console: data that is too long is now abbreviated as follows: text... (100000 characters). A large binary is abbreviated as follows: abcdef... (100000 bytes).
#H2 Console: data that is too long is now abbreviated as follows: text... (100000 characters). A large binary is abbreviated as follows: abcdef... (100000 bytes).
@changelog_1037_li
@changelog_1039_li
#Faster data conversion from BIGINT or INT to DECIMAL.
#Faster data conversion from BIGINT or INT to DECIMAL.
@changelog_1038_li
@changelog_1040_li
#Server-less multi-connection mode: try to delete log files if switching between read/write operations.
#Server-less multi-connection mode: try to delete log files if switching between read/write operations.
@changelog_1039_li
@changelog_1041_li
#CompressLZF: Faster decompress and improved javadocs
#CompressLZF: Faster decompress and improved javadocs
@changelog_1040_h2
@changelog_1042_h2
#Version 1.2.126 (2009-12-18)
#Version 1.2.126 (2009-12-18)
@changelog_1041_li
@changelog_1043_li
#The ChangeFileEncryption tool will now fail with an exception if the database is still in use. The Backup tool will also fail except when running in quiet mode.
#The ChangeFileEncryption tool will now fail with an exception if the database is still in use. The Backup tool will also fail except when running in quiet mode.
@changelog_1042_li
@changelog_1044_li
#CSVREAD: when reading the column names from the CSV file, column names that contain no special characters are considered case insensitive now.
#CSVREAD: when reading the column names from the CSV file, column names that contain no special characters are considered case insensitive now.
@changelog_1043_li
@changelog_1045_li
#Optimization index conditions of the form 'column=NULL' (which is always false; unlike 'column IS NULL').
#Optimization index conditions of the form 'column=NULL' (which is always false; unlike 'column IS NULL').
@changelog_1044_li
@changelog_1046_li
#Script command and tool: the primary key constraint is now listed before inserting the data. This will result in a smaller database when using the page store.
#Script command and tool: the primary key constraint is now listed before inserting the data. This will result in a smaller database when using the page store.
@changelog_1045_li
@changelog_1047_li
#Statements with IN(SELECT..) conditions could produce the wrong result. Example: index on id, name; query: select * from test where id between 1 and 3 and name in (select 'World').
#Statements with IN(SELECT..) conditions could produce the wrong result. Example: index on id, name; query: select * from test where id between 1 and 3 and name in (select 'World').
@changelog_1046_li
@changelog_1048_li
#Statements with IN(..) conditions could produce the wrong result when using views or nested select statements. Example: index on id; index on name; query: select * from (select * from test) where id=1 and name in('a', 'b'). select * from (select * from test) where id=1 and name in('Hello', 'World').
#Statements with IN(..) conditions could produce the wrong result when using views or nested select statements. Example: index on id; index on name; query: select * from (select * from test) where id=1 and name in('a', 'b'). select * from (select * from test) where id=1 and name in('Hello', 'World').
@changelog_1047_li
@changelog_1049_li
#Page store: a rollback of a relatively large transaction could fail with an ArrayIndexOutOfBoundsException or a 'row not found' exception in the PageBtreeIndex in some cases.
#Page store: a rollback of a relatively large transaction could fail with an ArrayIndexOutOfBoundsException or a 'row not found' exception in the PageBtreeIndex in some cases.
@changelog_1048_li
@changelog_1050_li
#JaQu: the decompiler has been improved, and a few test cases already work. It is still incomplete however.
#JaQu: the decompiler has been improved, and a few test cases already work. It is still incomplete however.
@changelog_1049_li
@changelog_1051_li
#LIKE: any letter is now allowed after the escape character (which is still '\' by default). Previously, an exception was thrown (unlike other databases) if it was not the escape character, '_' or '%'. If the escape character appears at the end of the pattern, the result is it is ignored (like PostgreSQL and MS SQL Server).
#LIKE: any letter is now allowed after the escape character (which is still '\' by default). Previously, an exception was thrown (unlike other databases) if it was not the escape character, '_' or '%'. If the escape character appears at the end of the pattern, the result is it is ignored (like PostgreSQL and MS SQL Server).
@changelog_1050_li
@changelog_1052_li
#The reserve heap memory is no longer used.
#The reserve heap memory is no longer used.
@changelog_1051_li
@changelog_1053_li
#Database.checkpoint() could throw a NullPointerException.
#Database.checkpoint() could throw a NullPointerException.
@changelog_1052_h2
@changelog_1054_h2
#Version 1.2.125 (2009-12-06)
#Version 1.2.125 (2009-12-06)
@changelog_1053_li
@changelog_1055_li
#Lucene fulltext search: the Lucene field names now match the table column names, except if the column names start with _ (in which case another _ is prepended). Unfortunately this change means existing fulltext indexes need to be re-built.
#Lucene fulltext search: the Lucene field names now match the table column names, except if the column names start with _ (in which case another _ is prepended). Unfortunately this change means existing fulltext indexes need to be re-built.
@changelog_1054_li
@changelog_1056_li
#The shell tool now has a very simple statement history.
#The shell tool now has a very simple statement history.
@changelog_1055_li
@changelog_1057_li
#The zip file system implementation now supports the '~' home directory prefix. Example database URL: jdbc:h2:zip:~/test.zip!/test
#The zip file system implementation now supports the '~' home directory prefix. Example database URL: jdbc:h2:zip:~/test.zip!/test
@changelog_1056_li
@changelog_1058_li
#Right outer joins on tables that were already 'inner joined' was processed incorrectly.
#Right outer joins on tables that were already 'inner joined' was processed incorrectly.
@changelog_1057_li
@changelog_1059_li
#Temporary files from LOB objects were not deleted early enough when using the server mode.
#Temporary files from LOB objects were not deleted early enough when using the server mode.
@changelog_1058_li
@changelog_1060_li
#Trying to alter a temporary table threw a strange exception. It is still not possible to do that, but the exception message is better now.
#Trying to alter a temporary table threw a strange exception. It is still not possible to do that, but the exception message is better now.
@changelog_1059_li
@changelog_1061_li
#When the system property h2.maxMemoryRowsDistinct was set, and using SELECT DISTINCT, the temporary table was not correctly dropped. This could cause problems in recovery when the process was killed.
#When the system property h2.maxMemoryRowsDistinct was set, and using SELECT DISTINCT, the temporary table was not correctly dropped. This could cause problems in recovery when the process was killed.
@changelog_1060_li
@changelog_1062_li
#Trigger that are called before a select statement are now supported. This allows to create tables that work like materialized views.
#Trigger that are called before a select statement are now supported. This allows to create tables that work like materialized views.
@changelog_1061_li
@changelog_1063_li
#Non-row based triggers were called even if the action didn't match the declared action (INSERT triggers were also called when deleting rows). This has been changed. The MERGE statement calls both INSERT and DELETE triggers.
#Non-row based triggers were called even if the action didn't match the declared action (INSERT triggers were also called when deleting rows). This has been changed. The MERGE statement calls both INSERT and DELETE triggers.
@changelog_1062_li
@changelog_1064_li
#Statements with IN(..) conditions could produce the wrong result or a data conversion error (since version 1.2.120). Examples: index on id, name, condition: id=1 and name in('Hello', 'x'); index on id, query: select * from (select * from test) where id=1 and name in('Hello', 'World').
#Statements with IN(..) conditions could produce the wrong result or a data conversion error (since version 1.2.120). Examples: index on id, name, condition: id=1 and name in('Hello', 'x'); index on id, query: select * from (select * from test) where id=1 and name in('Hello', 'World').
@changelog_1063_li
@changelog_1065_li
#The CompressTool was not multithreading safe. Because of this, the following database operations where also not multithreading safe (even when using different databases): the SCRIPT command (only when using compression), the COMPRESS function, and storing CLOB or BLOB data (only when compression is enabled).
#The CompressTool was not multithreading safe. Because of this, the following database operations where also not multithreading safe (even when using different databases): the SCRIPT command (only when using compression), the COMPRESS function, and storing CLOB or BLOB data (only when compression is enabled).
@changelog_1064_li
@changelog_1066_li
#The compression algorithm "LZF" is now about 33% faster than before when compressing small block (around 2 KB). It is much faster than Deflate, but the compression ratio is lower. Some of the optimizations are from Sam Van Oort, thanks a lot!
#The compression algorithm "LZF" is now about 33% faster than before when compressing small block (around 2 KB). It is much faster than Deflate, but the compression ratio is lower. Some of the optimizations are from Sam Van Oort, thanks a lot!
@changelog_1065_li
@changelog_1067_li
#Compressing large blocks of data didn't work when using the "Deflate" compression algorithm. Compressing a lot of data could run out of heap memory.
#Compressing large blocks of data didn't work when using the "Deflate" compression algorithm. Compressing a lot of data could run out of heap memory.
@changelog_1066_li
@changelog_1068_li
#The test cases don't access the file system directly, this simplifies GAE for Java testing. Thanks to Vince Bonfanti.
#The test cases don't access the file system directly, this simplifies GAE for Java testing. Thanks to Vince Bonfanti.
@changelog_1067_li
@changelog_1069_li
#More bugs in the server-less multi-connection mode have been fixed.
#More bugs in the server-less multi-connection mode have been fixed.
@changelog_1068_li
@changelog_1070_li
#When running against an old database, the SCRIPT statement could generate a SQL script that contained duplicate indexes (PRIMARY_KEY_E).
#When running against an old database, the SCRIPT statement could generate a SQL script that contained duplicate indexes (PRIMARY_KEY_E).
@changelog_1069_li
@changelog_1071_li
#JdbcConnectionPool.getConnection() could throw a NullPointerException.
#JdbcConnectionPool.getConnection() could throw a NullPointerException.
@changelog_1070_li
@changelog_1072_li
#User defined functions: the source code is now available using SELECT SOURCE FROM INFORMATION_SCHEMA.FUNCTION_ALIASES.
#User defined functions: the source code is now available using SELECT SOURCE FROM INFORMATION_SCHEMA.FUNCTION_ALIASES.
@changelog_1071_li
@changelog_1073_li
#User defined functions with source code didn't work after re-opening the database.
#User defined functions with source code didn't work after re-opening the database.
@changelog_1072_li
@changelog_1074_li
#The newsfeeds are now Atom 1.0 standard compliant.
#The newsfeeds are now Atom 1.0 standard compliant.
@changelog_1073_li
@changelog_1075_li
#The database is now closed after an out of memory exception, because the database could get corrupt otherwise.
#The database is now closed after an out of memory exception, because the database could get corrupt otherwise.
@changelog_1074_li
@changelog_1076_li
#Better error message if both AUTO_SERVER and SERIALIZED parameters are set to TRUE.
#Better error message if both AUTO_SERVER and SERIALIZED parameters are set to TRUE.
@changelog_1075_li
@changelog_1077_li
#Drop table did not delete lob files in old file store (not PAGE_STORE).
#Drop table did not delete lob files in old file store (not PAGE_STORE).
@changelog_1076_h2
@changelog_1078_h2
#Version 1.2.124 (2009-11-20)
#Version 1.2.124 (2009-11-20)
@changelog_1077_li
@changelog_1079_li
#Clustering: there is now a way to detect which cluster instances are running.
#Clustering: there is now a way to detect which cluster instances are running.
@changelog_1078_li
@changelog_1080_li
#ConvertTraceFile: the SQL statement statistics are better formatted (newline are removed).
#ConvertTraceFile: the SQL statement statistics are better formatted (newline are removed).
@changelog_1079_li
@changelog_1081_li
#The file lock thread is now stopped when the database is closed.
#The file lock thread is now stopped when the database is closed.
@changelog_1080_li
@changelog_1082_li
#Issue 140: the Script tool now supports writing to a stream.
#Issue 140: the Script tool now supports writing to a stream.
@changelog_1081_li
@changelog_1083_li
#Issue 138: the trace output of Statement.execute(String, int) and executeUpdate was incorrect.
#Issue 138: the trace output of Statement.execute(String, int) and executeUpdate was incorrect.
@changelog_1082_li
@changelog_1084_li
#Page store: new databases can not be opened with older versions.
#Page store: new databases can not be opened with older versions.
@changelog_1083_li
@changelog_1085_li
#Page store: multi-column indexes didn't work if the cache was very small.
#Page store: multi-column indexes didn't work if the cache was very small.
@changelog_1084_li
@changelog_1086_li
#Page store: opening a database could theoretically result in an endless loop.
#Page store: opening a database could theoretically result in an endless loop.
@changelog_1085_li
@changelog_1087_li
#Page store: adding large indexed columns could get very slow.
#Page store: adding large indexed columns could get very slow.
@changelog_1086_li
@changelog_1088_li
#Page store: after a duplicate key exception, an ArrayIndexOutOfBoundsException could be thrown (only for very large rows).
#Page store: after a duplicate key exception, an ArrayIndexOutOfBoundsException could be thrown (only for very large rows).
@changelog_1087_li
@changelog_1089_li
#Page store: the recover tool sometimes generated a script file that contained duplicate data.
#Page store: the recover tool sometimes generated a script file that contained duplicate data.
@changelog_1088_li
@changelog_1090_li
#Page store: sometimes opening a read-only database failed.
#Page store: sometimes opening a read-only database failed.
@changelog_1089_li
@changelog_1091_li
#Page store: opening a database sometimes failed if large rows where updated, or if a table was truncated before.
#Page store: opening a database sometimes failed if large rows where updated, or if a table was truncated before.
@changelog_1090_li
@changelog_1092_li
#Page store: when using a very small page size (128 bytes or smaller), writing a large row could result in an endless recursion. This is only a theoretical problem, as the page size is 2 KB.
#Page store: when using a very small page size (128 bytes or smaller), writing a large row could result in an endless recursion. This is only a theoretical problem, as the page size is 2 KB.
@changelog_1091_li
@changelog_1093_li
#Page store: getting the min value from a descending index with NULL entries could return the wrong result.
#Page store: getting the min value from a descending index with NULL entries could return the wrong result.
@changelog_1092_li
@changelog_1094_li
#Page store: improved auto-recovery after power failure.
#Page store: improved auto-recovery after power failure.
@changelog_1093_li
@changelog_1095_li
#The JDBC client did not detect that it was not talking to an H2 server. This could result in strange exceptions when trying to connect to another kind of server.
#The JDBC client did not detect that it was not talking to an H2 server. This could result in strange exceptions when trying to connect to another kind of server.
@changelog_1094_li
@changelog_1096_li
#User defined functions can be created with source code. Example: CREATE ALIAS HI AS 'String hi() { return "Hello"; }'
#User defined functions can be created with source code. Example: CREATE ALIAS HI AS 'String hi() { return "Hello"; }'
@changelog_1095_li
@changelog_1097_li
#Database file lock: the exception "lock file modified in the future" is no longer thrown; instead, opening the file will be delayed by 2 seconds.
#Database file lock: the exception "lock file modified in the future" is no longer thrown; instead, opening the file will be delayed by 2 seconds.
@changelog_1096_li
@changelog_1098_li
#Inserting LOBs got slower each time the process was restarted. It could loop endlessly after about 1000 process restarts.
#Inserting LOBs got slower each time the process was restarted. It could loop endlessly after about 1000 process restarts.
@changelog_1097_li
@changelog_1099_li
#Issue 117: Multi-version concurrency: concurrent MERGE statements now work.
#Issue 117: Multi-version concurrency: concurrent MERGE statements now work.
@changelog_1098_li
@changelog_1100_li
#Improved read-only database detection.
#Improved read-only database detection.
@changelog_1099_h2
@changelog_1101_h2
#Version 1.2.123 (2009-11-08)
#Version 1.2.123 (2009-11-08)
@changelog_1100_li
@changelog_1102_li
#Page store: new databases can not be opened with older versions.
#Page store: new databases can not be opened with older versions.
@changelog_1101_li
@changelog_1103_li
#Page store: updating large rows (rows with more than 2000 bytes of data) could corrupt the database.
#Page store: updating large rows (rows with more than 2000 bytes of data) could corrupt the database.
@changelog_1102_li
@changelog_1104_li
#Page store: inserting very large rows failed with ArrayIndexOutOfBoundsException.
#Page store: inserting very large rows failed with ArrayIndexOutOfBoundsException.
@changelog_1103_li
@changelog_1105_li
#When using multi-threaded kernel mode, setting disabling locking (LOCK_MODE=0) will now throw an exception. At this time this combination will result in corruption when multiple threads try to update the same table.
#When using multi-threaded kernel mode, setting disabling locking (LOCK_MODE=0) will now throw an exception. At this time this combination will result in corruption when multiple threads try to update the same table.
@changelog_1104_li
@changelog_1106_li
#The fulltext search methods and fields are now protected instead of private, to make the classes more easily extensible.
#The fulltext search methods and fields are now protected instead of private, to make the classes more easily extensible.
@changelog_1105_li
@changelog_1107_li
#The Lucene fulltext search now also returns the score.
#The Lucene fulltext search now also returns the score.
@changelog_1106_li
@changelog_1108_li
# New function SCOPE_IDENTITY() to avoid problems when inserting rows in a trigger.
# New function SCOPE_IDENTITY() to avoid problems when inserting rows in a trigger.
@changelog_1107_li
@changelog_1109_li
#Statement.getGeneratedKeys() returned the wrong value if a trigger changed the identity value after inserting the row.
#Statement.getGeneratedKeys() returned the wrong value if a trigger changed the identity value after inserting the row.
@changelog_1108_li
@changelog_1110_li
#Improved error messages: identifiers and values are now quoted.
#Improved error messages: identifiers and values are now quoted.
@changelog_1109_li
@changelog_1111_li
#Improved error message when casting a value failed: the column name and type is included in the message.
#Improved error message when casting a value failed: the column name and type is included in the message.
@changelog_1110_li
@changelog_1112_li
#Improved support for GAE for Java thanks to Vince Bonfanti.
#Improved support for GAE for Java thanks to Vince Bonfanti.
@changelog_1111_h2
@changelog_1113_h2
#Version 1.2.122 (2009-10-28)
#Version 1.2.122 (2009-10-28)
@changelog_1112_li
@changelog_1114_li
#The native fulltext search now supports streaming CLOB data.
#The native fulltext search now supports streaming CLOB data.
@changelog_1113_li
@changelog_1115_li
#If the database URL ends with ;PAGE_STORE=TRUE and a database in the old format exists, it is automatically converted to the new page store format if possible. A backup of the database is created first. Automatic conversion is not supported if the database was not closed normally (if it contains uncommitted transactions).
#If the database URL ends with ;PAGE_STORE=TRUE and a database in the old format exists, it is automatically converted to the new page store format if possible. A backup of the database is created first. Automatic conversion is not supported if the database was not closed normally (if it contains uncommitted transactions).
@changelog_1114_li
@changelog_1116_li
#Dropping the current user is now allowed if another admin user exists.
#Dropping the current user is now allowed if another admin user exists.
@changelog_1115_li
@changelog_1117_li
#Values of type BINARY or BLOB could not be converted to the data type OTHER.
#Values of type BINARY or BLOB could not be converted to the data type OTHER.
@changelog_1116_li
@changelog_1118_li
#SHUTDOWN COMPACT now fully compacts the database.
#SHUTDOWN COMPACT now fully compacts the database.
@changelog_1117_li
@changelog_1119_li
#New system properties h2.maxCompactCount and h2.maxCompactTime to allow changing the default behavior (at most 2 seconds compacting when closing the database).
#New system properties h2.maxCompactCount and h2.maxCompactTime to allow changing the default behavior (at most 2 seconds compacting when closing the database).
@changelog_1118_li
@changelog_1120_li
#New sorted insert optimization (see Performance / Database Performance Tuning).
#New sorted insert optimization (see Performance / Database Performance Tuning).
@changelog_1119_li
@changelog_1121_li
#Issue 116: The files h2*-sources.jar and h2*-javadoc.jar are now in the Maven repository.
#Issue 116: The files h2*-sources.jar and h2*-javadoc.jar are now in the Maven repository.
@changelog_1120_li
@changelog_1122_li
#Page store: opening a large database was slow if it was not closed before.
#Page store: opening a large database was slow if it was not closed before.
@changelog_1121_li
@changelog_1123_li
#Page store: new write and read counters in the meta data table. Use SELECT * FROM INFORMATION_SCHEMA.SETTINGS WHERE NAME IN( 'info.FILE_WRITE_TOTAL', 'info.FILE_WRITE', 'info.FILE_READ', 'info.CACHE_MAX_SIZE', 'info.CACHE_SIZE')
#Page store: new write and read counters in the meta data table. Use SELECT * FROM INFORMATION_SCHEMA.SETTINGS WHERE NAME IN( 'info.FILE_WRITE_TOTAL', 'info.FILE_WRITE', 'info.FILE_READ', 'info.CACHE_MAX_SIZE', 'info.CACHE_SIZE')
@changelog_1122_li
@changelog_1124_li
#The SQL syntax is documented using (railroad) diagrams. The diagrams are HTML.
#The SQL syntax is documented using (railroad) diagrams. The diagrams are HTML.
@changelog_1123_li
@changelog_1125_li
#The documentation is no longer available in Japanese because the translation was too much out of sync. Please use the Google translation instead.
#The documentation is no longer available in Japanese because the translation was too much out of sync. Please use the Google translation instead.
@changelog_1124_li
@changelog_1126_li
#Certain queries were not sorted if subselect queries were involved
#Certain queries were not sorted if subselect queries were involved
@changelog_1125_li
@changelog_1127_li
#More bugs in the server-less multi-connection mode have been fixed: 90097 The database is read only, caches must be cleared on reconnect, etc.
#More bugs in the server-less multi-connection mode have been fixed: 90097 The database is read only, caches must be cleared on reconnect, etc.
@changelog_1126_h2
@changelog_1128_h2
#Version 1.2.121 (2009-10-11)
#Version 1.2.121 (2009-10-11)
@changelog_1127_li
@changelog_1129_li
#Better support GaeVFS (Google App Engine Virtual File System) thanks to Thanks to Vince Bonfanti.
#Better support GaeVFS (Google App Engine Virtual File System) thanks to Thanks to Vince Bonfanti.
@changelog_1128_li
@changelog_1130_li
#CSVREAD didn't close the file. Thanks to Vince Bonfanti for the patch!
#CSVREAD didn't close the file. Thanks to Vince Bonfanti for the patch!
@changelog_1129_li
@changelog_1131_li
#If a database in the old format exists, it is now used. The system property is used for new databases, or if databases exist in both formats. In any case, the flag in the URL overrides this logic.
#If a database in the old format exists, it is now used. The system property is used for new databases, or if databases exist in both formats. In any case, the flag in the URL overrides this logic.
@changelog_1130_li
@changelog_1132_li
#Page store bugs were fixed. Large values in indexed columns could corrupt the index.
#Page store bugs were fixed. Large values in indexed columns could corrupt the index.
@changelog_1131_li
@changelog_1133_li
#The page store did not work when using Retrotranslator (because the Retrotranslator doesn't support Integer.reverse and Long.reverse).
#The page store did not work when using Retrotranslator (because the Retrotranslator doesn't support Integer.reverse and Long.reverse).
@changelog_1132_li
@changelog_1134_li
#New system property h2.pageStoreTrim to disable shrinking the database when closing (disabled by default, meaning by default the database is trimmed).
#New system property h2.pageStoreTrim to disable shrinking the database when closing (disabled by default, meaning by default the database is trimmed).
@changelog_1133_h2
@changelog_1135_h2
#Version 1.2.120 (2009-10-04)
#Version 1.2.120 (2009-10-04)
@changelog_1134_li
@changelog_1136_li
#This is a beta version.
#This is a beta version.
@changelog_1135_li
@changelog_1137_li
#Large updates could throw an ArrayIndexOutOfBoundsException in RowList.writeRow.
#Large updates could throw an ArrayIndexOutOfBoundsException in RowList.writeRow.
@changelog_1136_li
@changelog_1138_li
#In version 1.2, the following system properties are now enabled by default: h2.pageStore, h2.nullConcatIsNull, h2.optimizeInList. The default value for h2.defaultMaxLengthInplaceLob is now 4096 (it was 1024 with version 1.1).
#In version 1.2, the following system properties are now enabled by default: h2.pageStore, h2.nullConcatIsNull, h2.optimizeInList. The default value for h2.defaultMaxLengthInplaceLob is now 4096 (it was 1024 with version 1.1).
@changelog_1137_li
@changelog_1139_li
#New databases are now stored in the new 'page store' file format. Existing databases are kept in the old file format. To use the old file format, append ;PAGE_STORE=FALSE to the database URL or set the system property h2.pageStore to false.
#New databases are now stored in the new 'page store' file format. Existing databases are kept in the old file format. To use the old file format, append ;PAGE_STORE=FALSE to the database URL or set the system property h2.pageStore to false.
@changelog_1138_li
@changelog_1140_li
#Issue 125: Renaming primary keys was not persistent. Fixed. Unfortunately, databases created by this version can not be opened with older versions because of this change.
#Issue 125: Renaming primary keys was not persistent. Fixed. Unfortunately, databases created by this version can not be opened with older versions because of this change.
@changelog_1139_li
@changelog_1141_li
#Issue 124: Hibernate schema validation failed for decimal/numeric columns. This problem is fixed in the Hibernate dialect that is included with H2 (src/tools/org/hibernate/dialect/H2Dialect.java.txt), but not in Hibernate yet.
#Issue 124: Hibernate schema validation failed for decimal/numeric columns. This problem is fixed in the Hibernate dialect that is included with H2 (src/tools/org/hibernate/dialect/H2Dialect.java.txt), but not in Hibernate yet.
@changelog_1140_li
@changelog_1142_li
#PostgreSQL compatibility: function LASTVAL() as an alias for IDENTITY().
#PostgreSQL compatibility: function LASTVAL() as an alias for IDENTITY().
@changelog_1141_li
@changelog_1143_li
#Linked tables now support default values when inserting, updating or merging.
#Linked tables now support default values when inserting, updating or merging.
@changelog_1142_li
@changelog_1144_li
#Bugfixes in the page store.
#Bugfixes in the page store.
@changelog_1143_li
@changelog_1145_li
#Possibility to set a vendor id in Constants.java, so that unofficial builds are distinguishable from official releases.
#Possibility to set a vendor id in Constants.java, so that unofficial builds are distinguishable from official releases.
@changelog_1144_li
@changelog_1146_li
#Allow writing to linked tables in readonly databases.
#Allow writing to linked tables in readonly databases.
@changelog_1145_h2
@changelog_1147_h2
#Version 1.1.119 (2009-09-26)
#Version 1.1.119 (2009-09-26)
@changelog_1146_li
@changelog_1148_li
#SQL statements in the exception message are no longer included if they contain '--hide--'.
#SQL statements in the exception message are no longer included if they contain '--hide--'.
@changelog_1147_li
@changelog_1149_li
#Temporary local tables did not always work after reconnect if AUTO_SERVER=TRUE
#Temporary local tables did not always work after reconnect if AUTO_SERVER=TRUE
@changelog_1148_li
@changelog_1150_li
#New system property h2.defaultMaxLengthInplaceLob to change the default maximum size of an in-place LOB object.
#New system property h2.defaultMaxLengthInplaceLob to change the default maximum size of an in-place LOB object.
@changelog_1149_li
@changelog_1151_li
#New system property h2.nullConcatIsNull to change the default null concatenation behavior. The default will be enabled in version 1.2.
#New system property h2.nullConcatIsNull to change the default null concatenation behavior. The default will be enabled in version 1.2.
@changelog_1150_li
@changelog_1152_li
#The cache algorithm TQ is disabled in this version, because it is unstable, and because the current implementation does not have any measurable advantages over the default.
#The cache algorithm TQ is disabled in this version, because it is unstable, and because the current implementation does not have any measurable advantages over the default.
@changelog_1151_li
@changelog_1153_li
#New committer: Christian Peter. He works for <a href="http://www.docware.com">Docware</a> and helped a lot finding and fixing bugs, and generally improving the database. He is now a committer.
#New committer: Christian Peter. He works for <a href="http://www.docware.com">Docware</a> and helped a lot finding and fixing bugs, and generally improving the database. He is now a committer.
@changelog_1152_li
@changelog_1154_li
#ChangeFileEncryption did not work with Lob subdirectories. Fixed.
#ChangeFileEncryption did not work with Lob subdirectories. Fixed.
@changelog_1153_li
@changelog_1155_li
#Issue 121: JaQu: new simple update and merge methods.
#Issue 121: JaQu: new simple update and merge methods.
@changelog_1154_li
@changelog_1156_li
#Issue 120: JaQu didn't close result sets.
#Issue 120: JaQu didn't close result sets.
@changelog_1155_li
@changelog_1157_li
#Issue 119: JaQu creates wrong WHERE conditions on some inputs.
#Issue 119: JaQu creates wrong WHERE conditions on some inputs.
@changelog_1156_li
@changelog_1158_li
#The new page store mechanism is now alpha-level quality. The next release will most likely be "1.2.120 beta" where this mode is enabled by default. To use it right now, append ;PAGE_STORE=TRUE to the database URL. The file format of this mode will probably not change any more.
#The new page store mechanism is now alpha-level quality. The next release will most likely be "1.2.120 beta" where this mode is enabled by default. To use it right now, append ;PAGE_STORE=TRUE to the database URL. The file format of this mode will probably not change any more.
@changelog_1157_li
@changelog_1159_li
#SELECT COUNT(*) FROM SYSTEM_RANGE(...) returned the wrong result. Fixed.
#SELECT COUNT(*) FROM SYSTEM_RANGE(...) returned the wrong result. Fixed.
@changelog_1158_li
@changelog_1160_li
#The Recover tool now also processes the log files, however applying those changes is still a manual process.
#The Recover tool now also processes the log files, however applying those changes is still a manual process.
@changelog_1159_li
@changelog_1161_li
#New sample application that shows how to pass data to a trigger.
#New sample application that shows how to pass data to a trigger.
@changelog_1160_li
@changelog_1162_li
#More bugs in the server-less multi-connection mode have been fixed: On Windows, two processes could write to the same database at the same time.
#More bugs in the server-less multi-connection mode have been fixed: On Windows, two processes could write to the same database at the same time.
@changelog_1161_li
@changelog_1163_li
#When loading triggers or other client classes (static functions, database event listener, user aggregate functions, other JDBC drivers), the database now uses the context class loader if the class could not be found using Class.forName().
#When loading triggers or other client classes (static functions, database event listener, user aggregate functions, other JDBC drivers), the database now uses the context class loader if the class could not be found using Class.forName().
@changelog_1162_li
@changelog_1164_li
#Updating many rows with the same CLOB or BLOB values could result in FileNotFoundException.
#Updating many rows with the same CLOB or BLOB values could result in FileNotFoundException.
@changelog_1163_li
@changelog_1165_li
#Statement.getConnection() threw an exception if the connection was already closed.
#Statement.getConnection() threw an exception if the connection was already closed.
@changelog_1164_li
@changelog_1166_li
#The native fulltext index kept a reference to a database after the database was closed.
#The native fulltext index kept a reference to a database after the database was closed.
@changelog_1165_li
@changelog_1167_li
#Non-unique in-memory hash indexes are now supported. Thanks a lot to Sergi Vladykin for the patch!
#Non-unique in-memory hash indexes are now supported. Thanks a lot to Sergi Vladykin for the patch!
@changelog_1166_li
@changelog_1168_li
#The optimizer does a better job for joins if indexes are missing.
#The optimizer does a better job for joins if indexes are missing.
@changelog_1167_h2
@changelog_1169_h2
#Version 1.1.118 (2009-09-04)
#Version 1.1.118 (2009-09-04)
@changelog_1168_li
@changelog_1170_li
#SHOW COLUMNS only listed indexed columns.
#SHOW COLUMNS only listed indexed columns.
@changelog_1169_li
@changelog_1171_li
#When calling SHUTDOWN IMMEDIATELY in the server mode, the .trace.db file was not closed.
#When calling SHUTDOWN IMMEDIATELY in the server mode, the .trace.db file was not closed.
@changelog_1170_li
@changelog_1172_li
#DatabaseMetaData.getPrimaryKeys: the wrong constraint name was reported if there was another constraint on the same table and columns.
#DatabaseMetaData.getPrimaryKeys: the wrong constraint name was reported if there was another constraint on the same table and columns.
@changelog_1171_li
@changelog_1173_li
#AUTO_INCREMENT now works in the same way in ALTER TABLE ALTER COLUMN as in CREATE TABLE (it does not create a primary key).
#AUTO_INCREMENT now works in the same way in ALTER TABLE ALTER COLUMN as in CREATE TABLE (it does not create a primary key).
@changelog_1172_li
@changelog_1174_li
#Native fulltext search: before searching, FT_INIT() had to be called. This is no longer required.
#Native fulltext search: before searching, FT_INIT() had to be called. This is no longer required.
@changelog_1173_li
@changelog_1175_li
#Better support GaeVFS (Google App Engine Virtual File System).
#Better support GaeVFS (Google App Engine Virtual File System).
@changelog_1174_li
@changelog_1176_li
#JaQu: the plan is to support natural (pure Java / Scala) conditions such as (id == 1 && name.equals("Test")). A proof of concept decompiler is now included (it doesn't work yet).
#JaQu: the plan is to support natural (pure Java / Scala) conditions such as (id == 1 && name.equals("Test")). A proof of concept decompiler is now included (it doesn't work yet).
@changelog_1175_li
@changelog_1177_li
#Various bugfixes and improvements in the page store mechanism (still experimental).
#Various bugfixes and improvements in the page store mechanism (still experimental).
@changelog_1176_li
@changelog_1178_li
#PreparedStatement.setObject now converts a java.lang.Character to a string.
#PreparedStatement.setObject now converts a java.lang.Character to a string.
@changelog_1177_li
@changelog_1179_li
#H2 Console: PierPaolo Ucchino has completed the Italian translation. Thanks a lot!
#H2 Console: PierPaolo Ucchino has completed the Italian translation. Thanks a lot!
@changelog_1178_li
@changelog_1180_li
#Various tools now use Java 5 var-args, such as main the methods and SimpleResultSet.addRow.
#Various tools now use Java 5 var-args, such as main the methods and SimpleResultSet.addRow.
@changelog_1179_li
@changelog_1181_li
#H2 Console: indexes of tables of non-default schemas are now also listed.
#H2 Console: indexes of tables of non-default schemas are now also listed.
@changelog_1180_li
@changelog_1182_li
#Issue 111: Multi-version concurrency / duplicate primary key after rollback.
#Issue 111: Multi-version concurrency / duplicate primary key after rollback.
@changelog_1181_li
@changelog_1183_li
#Issue 110: Multi-version concurrency / wrong exception is thrown.
#Issue 110: Multi-version concurrency / wrong exception is thrown.
@changelog_1182_li
@changelog_1184_li
#Parser: sequenceName.NEXTVAL and CURRVAL did not respect the schema search path.
#Parser: sequenceName.NEXTVAL and CURRVAL did not respect the schema search path.
@changelog_1183_li
@changelog_1185_li
#Issue 101: The following sequence could throw the exception "Row not found when trying to delete": start a transaction, insert many rows, delete many rows, rollback. The number of rows depends on the cache size.
#Issue 101: The following sequence could throw the exception "Row not found when trying to delete": start a transaction, insert many rows, delete many rows, rollback. The number of rows depends on the cache size.
@changelog_1184_li
@changelog_1186_li
#The stack trace of very common exceptions is no longer written to the .trace.db file by default.
#The stack trace of very common exceptions is no longer written to the .trace.db file by default.
@changelog_1185_li
@changelog_1187_li
#An optimization for OR is implemented, but disabled by default. Expressions of the type X=1 OR X=2 are converted to X IN(1, 2). To enable, set the system property h2.optimizeInList to true before loading the H2 JDBC driver.
#An optimization for OR is implemented, but disabled by default. Expressions of the type X=1 OR X=2 are converted to X IN(1, 2). To enable, set the system property h2.optimizeInList to true before loading the H2 JDBC driver.
@changelog_1186_li
@changelog_1188_li
#An optimization for IN(..) and IN(SELECT...) is implemented, but disabled by default. To enable, set the system property h2.optimizeInList to true before loading the H2 JDBC driver. If enabled, this overrides h2.optimizeIn and h2.optimizeInJoin. Unlike now, this optimization will also speed up updates and deletes.
#An optimization for IN(..) and IN(SELECT...) is implemented, but disabled by default. To enable, set the system property h2.optimizeInList to true before loading the H2 JDBC driver. If enabled, this overrides h2.optimizeIn and h2.optimizeInJoin. Unlike now, this optimization will also speed up updates and deletes.
@changelog_1187_h2
@changelog_1189_h2
#Version 1.1.117 (2009-08-09)
#Version 1.1.117 (2009-08-09)
@changelog_1188_li
@changelog_1190_li
#New committer: Sam Van Oort has been contributing to H2 since quite some time in many ways (on the mailing list, documentation, and in the form of patches). He is now a committer.
#New committer: Sam Van Oort has been contributing to H2 since quite some time in many ways (on the mailing list, documentation, and in the form of patches). He is now a committer.
@changelog_1189_li
@changelog_1191_li
#JaQu: the order of the fields in the database no longer needs to match the order in the database.
#JaQu: the order of the fields in the database no longer needs to match the order in the database.
@changelog_1190_li
@changelog_1192_li
#Issue 103: MVCC: the setting MAX_MEMORY_UNDO can currently not be supported when using multi-version concurrency, that means the complete undo log must fit in memory.
#Issue 103: MVCC: the setting MAX_MEMORY_UNDO can currently not be supported when using multi-version concurrency, that means the complete undo log must fit in memory.
@changelog_1191_li
@changelog_1193_li
#LIKE: the escape mechanism can now be disable using ESCAPE ''. The default escape character can be changed using the system property h2.defaultEscape. The default is still '\' (as in MySQL and PostgreSQL).
#LIKE: the escape mechanism can now be disable using ESCAPE ''. The default escape character can be changed using the system property h2.defaultEscape. The default is still '\' (as in MySQL and PostgreSQL).
@changelog_1192_li
@changelog_1194_li
#Views using functions were not re-evaluated when necessary.
#Views using functions were not re-evaluated when necessary.
@changelog_1193_li
@changelog_1195_li
#Improved MySQL compatibility for SHOW COLUMNS.
#Improved MySQL compatibility for SHOW COLUMNS.
@changelog_1194_li
@changelog_1196_li
#Improved PostgreSQL compatibility for timestamp literals with timezone.
#Improved PostgreSQL compatibility for timestamp literals with timezone.
@changelog_1195_li
@changelog_1197_li
#Sergi Vladykin translated the error messages to Russian. Thanks a lot!
#Sergi Vladykin translated the error messages to Russian. Thanks a lot!
@changelog_1196_li
@changelog_1198_li
#Support for Java 6 DatabaseMetaData.getTables, getColumns, getProcedures, and getProcedureColumns.
#Support for Java 6 DatabaseMetaData.getTables, getColumns, getProcedures, and getProcedureColumns.
@changelog_1197_li
@changelog_1199_li
#Issue 101: Rollback of a large transaction (more than 100000 rows) could fail.
#Issue 101: Rollback of a large transaction (more than 100000 rows) could fail.
@changelog_1198_li
@changelog_1200_li
#Various bugfixes and improvements in the page store mechanism (still experimental).
#Various bugfixes and improvements in the page store mechanism (still experimental).
@changelog_1199_li
@changelog_1201_li
#The functions LENGTH, OCTET_LENGTH, and BIT_LENGTH now return BIGINT.
#The functions LENGTH, OCTET_LENGTH, and BIT_LENGTH now return BIGINT.
@changelog_1200_li
@changelog_1202_li
#Data types CLOB and BLOB: the maximum precision was Integer.MAX_VALUE, it is now Long.MAX_VALUE.
#Data types CLOB and BLOB: the maximum precision was Integer.MAX_VALUE, it is now Long.MAX_VALUE.
@changelog_1201_li
@changelog_1203_li
#Multi-threaded kernel: creating and dropping temporary database objects and the potentially free pages list was not correctly synchronized. Thanks a lot to Eric Faulhaber for the test case and patch!
#Multi-threaded kernel: creating and dropping temporary database objects and the potentially free pages list was not correctly synchronized. Thanks a lot to Eric Faulhaber for the test case and patch!
@changelog_1202_li
@changelog_1204_li
#Parsing SQL script files is now faster.
#Parsing SQL script files is now faster.
@changelog_1203_li
@changelog_1205_li
#CSV reading is now faster.
#CSV reading is now faster.
@changelog_1204_li
@changelog_1206_li
#SimpleResultSet.newInstance(SimpleRowSource rs) did not work.
#SimpleResultSet.newInstance(SimpleRowSource rs) did not work.
@changelog_1205_h2
@changelog_1207_h2
#Version 1.1.116 (2009-07-18)
#Version 1.1.116 (2009-07-18)
@changelog_1206_li
@changelog_1208_li
#Server-less multi-connection mode: more bugs are fixed.
#Server-less multi-connection mode: more bugs are fixed.
@changelog_1207_li
@changelog_1209_li
#The built-in help (INFORMATION_SCHEMA.HELP) is smaller, shrinking the jar file size a bit.
#The built-in help (INFORMATION_SCHEMA.HELP) is smaller, shrinking the jar file size a bit.
@changelog_1208_li
@changelog_1210_li
#H2 Console: column of tables of non-default schemas are now also listed, except for schemas starting with 'INFO'.
#H2 Console: column of tables of non-default schemas are now also listed, except for schemas starting with 'INFO'.
@changelog_1209_li
@changelog_1211_li
#ALTER TABLE: removing an auto-increment or identity column didn't remove the sequence.
#ALTER TABLE: removing an auto-increment or identity column didn't remove the sequence.
@changelog_1210_li
@changelog_1212_li
#Creating indexes is now a bit faster.
#Creating indexes is now a bit faster.
@changelog_1211_li
@changelog_1213_li
#PG Server: new system property h2.pgClientEncoding to explicitly set the encoding for clients that don't send the encoding (the default encoding is UTF-8). Thanks a lot to Sergi Vladykin for the patch!
#PG Server: new system property h2.pgClientEncoding to explicitly set the encoding for clients that don't send the encoding (the default encoding is UTF-8). Thanks a lot to Sergi Vladykin for the patch!
@changelog_1212_li
@changelog_1214_li
#PG Server: improved compatibility by using the type ids of the PostgreSQL driver. Thanks a lot to Sergi Vladykin for the patch!
#PG Server: improved compatibility by using the type ids of the PostgreSQL driver. Thanks a lot to Sergi Vladykin for the patch!
@changelog_1213_li
@changelog_1215_li
#H2 Console: Oracle system tables are no longer listed, improving performance.
#H2 Console: Oracle system tables are no longer listed, improving performance.
@changelog_1214_li
@changelog_1216_li
#Result sets are now read-only except if the statement or prepared statement was created with the concurrency ResultSet.CONCUR_UPDATABLE. This change is required because the old behavior (all result set are updatable) violated the JDBC spec. For backward compatibility, use the system property h2.defaultResultSetConcurrency.
#Result sets are now read-only except if the statement or prepared statement was created with the concurrency ResultSet.CONCUR_UPDATABLE. This change is required because the old behavior (all result set are updatable) violated the JDBC spec. For backward compatibility, use the system property h2.defaultResultSetConcurrency.
@changelog_1215_li
@changelog_1217_li
#New system property h2.defaultResultSetConcurrency to change the default result set concurrency.
#New system property h2.defaultResultSetConcurrency to change the default result set concurrency.
@changelog_1216_li
@changelog_1218_li
#JDBC: using an invalid result set type or concurrency now throws an exception.
#JDBC: using an invalid result set type or concurrency now throws an exception.
@changelog_1217_li
@changelog_1219_li
#If a pooled connection was not closed but garbage collected, a NullPointerException could occur.
#If a pooled connection was not closed but garbage collected, a NullPointerException could occur.
@changelog_1218_li
@changelog_1220_li
#Fulltext search: a NullPointerException was thrown when updating a value that was NULL previously.
#Fulltext search: a NullPointerException was thrown when updating a value that was NULL previously.
@changelog_1219_li
@changelog_1221_li
#The Recover tool did not work with .data.db files of the wrong size.
#The Recover tool did not work with .data.db files of the wrong size.
@changelog_1220_li
@changelog_1222_li
#Triggers: if there was an exception when initializing a trigger, this exception could be hidden, and in some cases (specially when using the Lucene fulltext index mechanism) a NullPointerException was thrown later on. Now the exception that occurred on init is thrown when changing data.
#Triggers: if there was an exception when initializing a trigger, this exception could be hidden, and in some cases (specially when using the Lucene fulltext index mechanism) a NullPointerException was thrown later on. Now the exception that occurred on init is thrown when changing data.
@changelog_1221_li
@changelog_1223_li
#The soft-references cache (CACHE_TYPE=SOFT_LRU) could throw a NullPointerException.
#The soft-references cache (CACHE_TYPE=SOFT_LRU) could throw a NullPointerException.
@changelog_1222_li
@changelog_1224_li
#To enable the new page store mechanism, append ;PAGE_STORE=TRUE to the database URL. or set the system property h2.pageStore to true. This mechanism is still experimental, and the file format will change, but it is quite stable now.
#To enable the new page store mechanism, append ;PAGE_STORE=TRUE to the database URL. or set the system property h2.pageStore to true. This mechanism is still experimental, and the file format will change, but it is quite stable now.
@changelog_1223_h2
@changelog_1225_h2
#Version 1.1.115 (2009-06-21)
#Version 1.1.115 (2009-06-21)
@changelog_1224_li
@changelog_1226_li
#The new storage mechanism is now alpha quality. To try it out, set the system property "h2.pageStore" to "true" (java -Dh2.pageStore=true). There are still bugs to be found and fixed, for example inserting many rows references a lot of main memory. Performance is currently about the same as with the regular storage mechanism, but the database file size is smaller. The file format is not stable yet.
#The new storage mechanism is now alpha quality. To try it out, set the system property "h2.pageStore" to "true" (java -Dh2.pageStore=true). There are still bugs to be found and fixed, for example inserting many rows references a lot of main memory. Performance is currently about the same as with the regular storage mechanism, but the database file size is smaller. The file format is not stable yet.
@changelog_1225_li
@changelog_1227_li
#ALTER TABLE could throw an exception "object already exists" in some cases.
#ALTER TABLE could throw an exception "object already exists" in some cases.
@changelog_1226_li
@changelog_1228_li
#Views: in some situations, an ArrayIndexOutOfBoundsException was thrown when using the same view concurrently.
#Views: in some situations, an ArrayIndexOutOfBoundsException was thrown when using the same view concurrently.
@changelog_1227_li
@changelog_1229_li
#java.util.UUID is now supported in PreparedStatement.setObject and user defined Java functions. ResultSet.getObject() returns a java.util.UUID when using the UUID data type.
#java.util.UUID is now supported in PreparedStatement.setObject and user defined Java functions. ResultSet.getObject() returns a java.util.UUID when using the UUID data type.
@changelog_1228_li
@changelog_1230_li
#H2 Console: the language was reset to the browser language when disconnecting.
#H2 Console: the language was reset to the browser language when disconnecting.
@changelog_1229_li
@changelog_1231_li
#H2 Console: improved Polish translation.
#H2 Console: improved Polish translation.
@changelog_1230_li
@changelog_1232_li
#Server-less multi-connection mode: more bugs are fixed.
#Server-less multi-connection mode: more bugs are fixed.
@changelog_1231_li
@changelog_1233_li
#The download page now included the SHA1 checksums.
#The download page now included the SHA1 checksums.
@changelog_1232_li
@changelog_1234_li
#Shell tool: the file encoding workaround is now documented if you run java org.h2.tools.Shell -?.
#Shell tool: the file encoding workaround is now documented if you run java org.h2.tools.Shell -?.
@changelog_1233_li
@changelog_1235_li
#The RunScript tool and SQL statement did not work with the compression method LZF.
#The RunScript tool and SQL statement did not work with the compression method LZF.
@changelog_1234_li
@changelog_1236_li
#Fulltext search: searching for NULL or an empty string threw an exception.
#Fulltext search: searching for NULL or an empty string threw an exception.
@changelog_1235_li
@changelog_1237_li
#Lucene fulltext search: FTL_DROP_ALL did not drop the triggers.
#Lucene fulltext search: FTL_DROP_ALL did not drop the triggers.
@changelog_1236_li
@changelog_1238_li
#Backup: if the database contained CLOB or BLOB data, the backup included a file entry for the LOB directory. This caused the restore to fail.
#Backup: if the database contained CLOB or BLOB data, the backup included a file entry for the LOB directory. This caused the restore to fail.
@changelog_1237_li
@changelog_1239_li
#Data types: LONG is now an alias for BIGINT.
#Data types: LONG is now an alias for BIGINT.
@changelog_1238_h2
@changelog_1240_h2
#Version 1.1.114 (2009-06-01)
#Version 1.1.114 (2009-06-01)
@changelog_1239_li
@changelog_1241_li
#ResultSetMetaData.getColumnClassName returned the wrong class for CLOB and BLOB columns.
#ResultSetMetaData.getColumnClassName returned the wrong class for CLOB and BLOB columns.
@changelog_1240_li
@changelog_1242_li
#Fulltext search: data is no longer deleted and re-inserted if the indexed columns didn't change.
#Fulltext search: data is no longer deleted and re-inserted if the indexed columns didn't change.
@changelog_1241_li
@changelog_1243_li
#In some situations, an ArrayIndexOutOfBoundsException was thrown when adding rows. This was caused by a bug in the b-tree code.
#In some situations, an ArrayIndexOutOfBoundsException was thrown when adding rows. This was caused by a bug in the b-tree code.
@changelog_1242_li
@changelog_1244_li
#Microsoft Windows Vista: when using the the installer, Vista wrote "This program may not have installed correctly." This message should no longer appear (in the h2.nsi file, the line 'RequestExecutionLevel highest' was added).
#Microsoft Windows Vista: when using the the installer, Vista wrote "This program may not have installed correctly." This message should no longer appear (in the h2.nsi file, the line 'RequestExecutionLevel highest' was added).
@changelog_1243_li
@changelog_1245_li
#The Recover tool did not always work when the database contains referential integrity constraints.
#The Recover tool did not always work when the database contains referential integrity constraints.
@changelog_1244_li
@changelog_1246_li
#Java 1.5 is now required to run H2. If required, Retrotranslator can be used to create a Java 1.4 version (http://retrotranslator.sourceforge.net/).
#Java 1.5 is now required to run H2. If required, Retrotranslator can be used to create a Java 1.4 version (http://retrotranslator.sourceforge.net/).
@changelog_1245_h2
@changelog_1247_h2
#Version 1.1.113 (2009-05-21)
#Version 1.1.113 (2009-05-21)
@changelog_1246_li
@changelog_1248_li
#Shell tool: the built-in commands EXIT, HELP, ?, LIST, and so on didn't work with a semicolon at the end.
#Shell tool: the built-in commands EXIT, HELP, ?, LIST, and so on didn't work with a semicolon at the end.
@changelog_1247_li
@changelog_1249_li
#JDK 1.5 is now required to build the jar file. However it is still possible to create a jar file for Java 1.4. For details, see buildRelease.sh and buildRelease.bat. As an alternative, compile using JDK 1.5 or 1.6 and use Retrotranslator to create a Java 1.4 version (http://retrotranslator.sourceforge.net/).
#JDK 1.5 is now required to build the jar file. However it is still possible to create a jar file for Java 1.4. For details, see buildRelease.sh and buildRelease.bat. As an alternative, compile using JDK 1.5 or 1.6 and use Retrotranslator to create a Java 1.4 version (http://retrotranslator.sourceforge.net/).
@changelog_1248_li
@changelog_1250_li
#When deleting or updating many rows in a table, the space in the index file was not re-used in the default mode (persistent database, b-tree index, LOG=1). This caused the index file to grow over time. Workarounds were to delete and re-created the index file, alter the table (add a remove a column), or append ;LOG=2 to the database URL. To disable the change, set the system property h2.reuseSpaceBtreeIndex to false.
#When deleting or updating many rows in a table, the space in the index file was not re-used in the default mode (persistent database, b-tree index, LOG=1). This caused the index file to grow over time. Workarounds were to delete and re-created the index file, alter the table (add a remove a column), or append ;LOG=2 to the database URL. To disable the change, set the system property h2.reuseSpaceBtreeIndex to false.
@changelog_1249_li
@changelog_1251_li
#Identifiers with a digit and then a dollar sign didn't work. Example: A1$B.
#Identifiers with a digit and then a dollar sign didn't work. Example: A1$B.
@changelog_1250_li
@changelog_1252_li
#MS SQL Server compatibility: support for linked tables with NVARCHAR, NCHAR, NCLOB, and LONGNVARCHAR.
#MS SQL Server compatibility: support for linked tables with NVARCHAR, NCHAR, NCLOB, and LONGNVARCHAR.
@changelog_1251_li
@changelog_1253_li
#Android: workaround for a problem when using read-only databases in zip files (skip seems to be implemented incorrectly on the Android system).
#Android: workaround for a problem when using read-only databases in zip files (skip seems to be implemented incorrectly on the Android system).
@changelog_1252_li
@changelog_1254_li
#Calling execute() or prepareStatement() with null as the SQL statement now throws an exception.
#Calling execute() or prepareStatement() with null as the SQL statement now throws an exception.
@changelog_1253_li
@changelog_1255_li
#Benchmark: the number of executed statements was incorrect. The H2 database was loaded at the beginning of the test to collect results, now it is loaded at the very end. Thanks to Fred Toussi from HSQLDB for reporting those problems. However the changed do not affect the relative performance.
#Benchmark: the number of executed statements was incorrect. The H2 database was loaded at the beginning of the test to collect results, now it is loaded at the very end. Thanks to Fred Toussi from HSQLDB for reporting those problems. However the changed do not affect the relative performance.
@changelog_1254_li
@changelog_1256_li
#H2 Console: command line settings are no longer stored in the properties file. They are now only used for the current process, except if they are explicitly saved.
#H2 Console: command line settings are no longer stored in the properties file. They are now only used for the current process, except if they are explicitly saved.
@changelog_1255_li
@changelog_1257_li
#Cache: support for a second level soft-references cache. To enable it, append ;CACHE_TYPE=SOFT_LRU (or SOFT_TQ) to the database URL, or set the system property h2.cacheTypeDefault to "SOFT_LRU" / "SOFT_TQ". Enabling the second level cache reduces performance for small databases, but speeds up large databases. It makes sense to use it if the available memory size is unknown. Thanks a lot to Jan Kotek!
#Cache: support for a second level soft-references cache. To enable it, append ;CACHE_TYPE=SOFT_LRU (or SOFT_TQ) to the database URL, or set the system property h2.cacheTypeDefault to "SOFT_LRU" / "SOFT_TQ". Enabling the second level cache reduces performance for small databases, but speeds up large databases. It makes sense to use it if the available memory size is unknown. Thanks a lot to Jan Kotek!
@changelog_1256_h2
@changelog_1258_h2
#Version 1.1.112 (2009-05-01)
#Version 1.1.112 (2009-05-01)
@changelog_1257_li
@changelog_1259_li
#JdbcPreparedStatement.toString() could throw a NullPointerException.
#JdbcPreparedStatement.toString() could throw a NullPointerException.
#Connection pool: the default login timeout is now 5 minutes.
#Connection pool: the default login timeout is now 5 minutes.
@changelog_1260_li
@changelog_1262_li
#After truncating tables, opening large databases could become slow because indexes were always re-built unnecessarily when opening.
#After truncating tables, opening large databases could become slow because indexes were always re-built unnecessarily when opening.
@changelog_1261_li
@changelog_1263_li
#More bugs in the server-less multi-connection mode have been fixed: Sometimes parameters of prepared statements were lost when a reconnecting. Concurrent read operations were slow. To improve performance, executeQuery(..) must be used for queries (execute(..) switches to the write mode, which is slow).
#More bugs in the server-less multi-connection mode have been fixed: Sometimes parameters of prepared statements were lost when a reconnecting. Concurrent read operations were slow. To improve performance, executeQuery(..) must be used for queries (execute(..) switches to the write mode, which is slow).
@changelog_1262_li
@changelog_1264_li
#GROUP BY queries with a self-join (join to the same table) that were grouped by columns with indexes returned the wrong result in some cases.
#GROUP BY queries with a self-join (join to the same table) that were grouped by columns with indexes returned the wrong result in some cases.
@changelog_1263_li
@changelog_1265_li
#Improved error message when the .lock.db file modification time is in the future.
#Improved error message when the .lock.db file modification time is in the future.
@changelog_1264_li
@changelog_1266_li
#The MERGE statement now returns 0 as the generated key if the row was updated.
#The MERGE statement now returns 0 as the generated key if the row was updated.
@changelog_1265_li
@changelog_1267_li
#Running code coverage is now automated.
#Running code coverage is now automated.
@changelog_1266_li
@changelog_1268_li
#A file system implementation can now be registered using FileSystem.register.
#A file system implementation can now be registered using FileSystem.register.
@changelog_1267_li
@changelog_1269_li
#The database file system is no longer included in the jar file, it moved to the test section.
#The database file system is no longer included in the jar file, it moved to the test section.
@changelog_1268_h2
@changelog_1270_h2
#Version 1.1.111 (2009-04-10)
#Version 1.1.111 (2009-04-10)
@changelog_1269_li
@changelog_1271_li
#In-memory databases can now run inside the Google App Engine.
#In-memory databases can now run inside the Google App Engine.
@changelog_1270_li
@changelog_1272_li
#Queries that are ordered by an indexed column returned no rows in certain cases (if all rows were deleted from the table previously, and there is a low number of rows in the table, and when not using other conditions, and when using the default b tree index).
#Queries that are ordered by an indexed column returned no rows in certain cases (if all rows were deleted from the table previously, and there is a low number of rows in the table, and when not using other conditions, and when using the default b tree index).
@changelog_1271_li
@changelog_1273_li
#The wrong exception was thrown when using unquoted text for the SQL statements COMMENT, ALTER USER, and SET PASSWORD.
#The wrong exception was thrown when using unquoted text for the SQL statements COMMENT, ALTER USER, and SET PASSWORD.
@changelog_1272_li
@changelog_1274_li
#The built-in connection pool did not roll back transactions and enable autocommit enabled after closing a connection.
#The built-in connection pool did not roll back transactions and enable autocommit enabled after closing a connection.
@changelog_1273_li
@changelog_1275_li
#Sometimes a StackOverflow occurred when checking for deadlock. See also http://code.google.com/p/h2database/issues/detail?id=61
#Sometimes a StackOverflow occurred when checking for deadlock. See also http://code.google.com/p/h2database/issues/detail?id=61
@changelog_1274_li
@changelog_1276_li
#The Shell tool no longer truncates results with only one column, and displays a message if data was truncated.
#The Shell tool no longer truncates results with only one column, and displays a message if data was truncated.
@changelog_1275_h2
@changelog_1277_h2
#Version 1.1.110 (2009-04-03)
#Version 1.1.110 (2009-04-03)
@changelog_1276_li
@changelog_1278_li
#Support for not persistent in-memory tables in regular (persistent) databases using CREATE MEMORY TABLE(..) NOT PERSISTENT. Thanks a lot to Sergi Vladykin for the patch!
#Support for not persistent in-memory tables in regular (persistent) databases using CREATE MEMORY TABLE(..) NOT PERSISTENT. Thanks a lot to Sergi Vladykin for the patch!
@changelog_1277_li
@changelog_1279_li
#The H2 Console trimmed the password (removed leading and trailing spaces). This is no longer the case, to support encrypted H2 database with an empty user password.
#The H2 Console trimmed the password (removed leading and trailing spaces). This is no longer the case, to support encrypted H2 database with an empty user password.
@changelog_1278_li
@changelog_1280_li
#The data type of a SUBSTRING method was wrong.
#The data type of a SUBSTRING method was wrong.
@changelog_1279_li
@changelog_1281_li
#ResultSet.findColumn and get methods with column label parameters now also check for matching column names (like most databases except MySQL).
#ResultSet.findColumn and get methods with column label parameters now also check for matching column names (like most databases except MySQL).
@changelog_1280_li
@changelog_1282_li
#H2 Console: the browser system property now supports a list of arguments. Example: java -Dh2.browser="open,-a,Safari,%url" ...
#H2 Console: the browser system property now supports a list of arguments. Example: java -Dh2.browser="open,-a,Safari,%url" ...
@changelog_1281_li
@changelog_1283_li
#Improved Javadoc navigation (similar to Scaladoc).
#Improved Javadoc navigation (similar to Scaladoc).
@changelog_1282_li
@changelog_1284_li
#H2 Console: auto-complete of identifiers did not work correctly for H2 databases in MySQL mode.
#H2 Console: auto-complete of identifiers did not work correctly for H2 databases in MySQL mode.
@changelog_1283_li
@changelog_1285_li
#DISTINCT and GROUP BY on a CLOB column was broken.
#DISTINCT and GROUP BY on a CLOB column was broken.
@changelog_1284_li
@changelog_1286_li
#The FTP server moved to the tools section and is no longer included in the h2*.jar file.
#The FTP server moved to the tools section and is no longer included in the h2*.jar file.
@changelog_1285_li
@changelog_1287_li
#Improved error message for unsupported features: now the message says what exactly is not supported.
#Improved error message for unsupported features: now the message says what exactly is not supported.
@changelog_1286_li
@changelog_1288_li
#Improved OSGi support.
#Improved OSGi support.
@changelog_1287_li
@changelog_1289_li
#Some internal caches did not use the LRU mechanism. Fixed (LOB file list, optimizer cost cache, trace system, view indexes, collection keys, compressed in-memory file system).
#Some internal caches did not use the LRU mechanism. Fixed (LOB file list, optimizer cost cache, trace system, view indexes, collection keys, compressed in-memory file system).
@changelog_1288_li
@changelog_1290_li
#The API of the tools changed a bit (each tool now returns an exit code).
#The API of the tools changed a bit (each tool now returns an exit code).
@changelog_1289_li
@changelog_1291_li
#Command line help of the tools now match the javadocs. The build converts the javadocs to a resource that is read by the tool at runtime. This should not have an effect on using the database, but it reduces duplicate and out-of-sync documentation.
#Command line help of the tools now match the javadocs. The build converts the javadocs to a resource that is read by the tool at runtime. This should not have an effect on using the database, but it reduces duplicate and out-of-sync documentation.
@changelog_1290_li
@changelog_1292_li
#CREATE TABLE: improved compatibility (support for UNIQUE NOT NULL).
#CREATE TABLE: improved compatibility (support for UNIQUE NOT NULL).
@changelog_1291_li
@changelog_1293_li
#DatabaseMetaData.getSQLKeywords now returns the correct list.
#DatabaseMetaData.getSQLKeywords now returns the correct list.
@changelog_1292_li
@changelog_1294_li
#Deterministic user defined functions did not work when the parameter was a column. Fixed.
#Deterministic user defined functions did not work when the parameter was a column. Fixed.
@changelog_1293_li
@changelog_1295_li
#JdbcConnectionPool.setLoginTimeout with 0 now uses the default timeout.
#JdbcConnectionPool.setLoginTimeout with 0 now uses the default timeout.
@changelog_1294_li
@changelog_1296_li
#Creating a JdbcConnectionPool has been simplified a bit.
#Creating a JdbcConnectionPool has been simplified a bit.
@changelog_1295_li
@changelog_1297_li
#The built-in connection pool did not re-use connections. Getting a connection using the built-in JdbcConnectionPool is now about 70 times faster than opening connections using DriverManager.getConnection.
#The built-in connection pool did not re-use connections. Getting a connection using the built-in JdbcConnectionPool is now about 70 times faster than opening connections using DriverManager.getConnection.
@changelog_1296_li
@changelog_1298_li
#More bugs in the server-less multi-connection mode have been fixed: If a process terminated while writing, other open connections were blocked. If two processes were writing to the database, sometimes the database was corrupt after closing.
#More bugs in the server-less multi-connection mode have been fixed: If a process terminated while writing, other open connections were blocked. If two processes were writing to the database, sometimes the database was corrupt after closing.
@changelog_1297_li
@changelog_1299_li
#Linked tables to SQLite database can now be created.
#Linked tables to SQLite database can now be created.
@changelog_1298_li
@changelog_1300_li
#Nested IN(IN(...)) didn't work.
#Nested IN(IN(...)) didn't work.
@changelog_1299_li
@changelog_1301_li
#NIO storage: the nio: prefix was using memory mapped files instead of FileChannel.
#NIO storage: the nio: prefix was using memory mapped files instead of FileChannel.
@changelog_1300_h2
@changelog_1302_h2
#Version 1.1.109 (2009-03-14)
#Version 1.1.109 (2009-03-14)
@changelog_1301_li
@changelog_1303_li
#The optimization for IN(...) is now only used if comparing a column with an index.
#The optimization for IN(...) is now only used if comparing a column with an index.
@changelog_1302_li
@changelog_1304_li
#User defined functions can now be deterministic (see CREATE ALIAS documentation).
#User defined functions can now be deterministic (see CREATE ALIAS documentation).
@changelog_1303_li
@changelog_1305_li
#Multiple nested queries in the FROM clause with parameters did not always work.
#Multiple nested queries in the FROM clause with parameters did not always work.
@changelog_1304_li
@changelog_1306_li
#When converting CLOB to BINARY, each character resulted in one byte. Now, the text is parsed as a hex as when converting VARCHAR.
#When converting CLOB to BINARY, each character resulted in one byte. Now, the text is parsed as a hex as when converting VARCHAR.
@changelog_1305_li
@changelog_1307_li
#New experimental NIO storage mechanism with both FileChannel and memory mapped files. To use it, use the file name prefix nio: or nioMapped: as in jdbc:h2:nio:~/test. So far it looks like NIO storage is faster on Mac OS but slower on some Windows systems. Thanks a lot to Jan Kotek for the patch!
#New experimental NIO storage mechanism with both FileChannel and memory mapped files. To use it, use the file name prefix nio: or nioMapped: as in jdbc:h2:nio:~/test. So far it looks like NIO storage is faster on Mac OS but slower on some Windows systems. Thanks a lot to Jan Kotek for the patch!
@changelog_1306_li
@changelog_1308_li
#The functions BITOR, BITAND, BITXOR, and MOD now accept and return BIGINT instead of INT.
#The functions BITOR, BITAND, BITXOR, and MOD now accept and return BIGINT instead of INT.
@changelog_1307_li
@changelog_1309_li
#Could not use the same linked table multiple times in the same query.
#Could not use the same linked table multiple times in the same query.
@changelog_1308_li
@changelog_1310_li
#Bugs in the server-less multi-connection mode have been fixed.
#Bugs in the server-less multi-connection mode have been fixed.
@changelog_1309_li
@changelog_1311_li
#Column names could not be named "UNIQUE" (with the quotes).
#Column names could not be named "UNIQUE" (with the quotes).
@changelog_1310_li
@changelog_1312_li
#New system function TRANSACTION_ID() to get the current transaction identifier for a session.
#New system function TRANSACTION_ID() to get the current transaction identifier for a session.
@changelog_1311_h2
@changelog_1313_h2
#Version 1.1.108 (2009-02-28)
#Version 1.1.108 (2009-02-28)
@changelog_1312_li
@changelog_1314_li
#When the shutdown hook closed the database, the last log file was deleted too early. This could cause uncommitted changes to be persisted. In some cases, this could cause data corruption.
#When the shutdown hook closed the database, the last log file was deleted too early. This could cause uncommitted changes to be persisted. In some cases, this could cause data corruption.
@changelog_1313_li
@changelog_1315_li
#JdbcConnectionPool: it was possible to set a negative connection pool size.
#JdbcConnectionPool: it was possible to set a negative connection pool size.
@changelog_1314_li
@changelog_1316_li
#Fulltext search did not support table names with a backslash.
#Fulltext search did not support table names with a backslash.
@changelog_1315_li
@changelog_1317_li
#The internal IntArray class did not work correctly when initialized with a zero length array.
#The internal IntArray class did not work correctly when initialized with a zero length array.
@changelog_1316_li
@changelog_1318_li
#The H2 Console web application (war file) did only support ASCII characters. Now UTF-8 is supported.
#The H2 Console web application (war file) did only support ASCII characters. Now UTF-8 is supported.
@changelog_1317_li
@changelog_1319_li
#DATEADD does no longer require that the argument is a timestamp.
#DATEADD does no longer require that the argument is a timestamp.
@changelog_1318_li
@changelog_1320_li
#The database file locking mechanism didn't work correctly on Mac OS.
#The database file locking mechanism didn't work correctly on Mac OS.
@changelog_1319_li
@changelog_1321_li
#Some built-in functions reported the wrong precision, scale, and display size.
#Some built-in functions reported the wrong precision, scale, and display size.
@changelog_1320_li
@changelog_1322_li
#MySQL compatibility for CREATE TABLE is improved (UNSIGNED, KEY).
#MySQL compatibility for CREATE TABLE is improved (UNSIGNED, KEY).
@changelog_1321_li
@changelog_1323_li
#Recovery did not work if there were more than 255 lobs stored as files.
#Recovery did not work if there were more than 255 lobs stored as files.
@changelog_1322_li
@changelog_1324_li
#New experimental mode to support multiple read-write connections without starting a server. To enable this mode, append ;FILE_LOCK=SERIALIZED;OPEN_NEW=TRUE to the database URL. Don't expect high performance when multiple concurrent writers.
#New experimental mode to support multiple read-write connections without starting a server. To enable this mode, append ;FILE_LOCK=SERIALIZED;OPEN_NEW=TRUE to the database URL. Don't expect high performance when multiple concurrent writers.
@changelog_1323_li
@changelog_1325_li
#In a web application, the database classes are not unloaded if a connection is open. This may cause out of memory when re-deploying a web application. The DbStarter is changed to close all connections to the configured database (by executing SHUTDOWN).
#In a web application, the database classes are not unloaded if a connection is open. This may cause out of memory when re-deploying a web application. The DbStarter is changed to close all connections to the configured database (by executing SHUTDOWN).
@changelog_1324_li
@changelog_1326_li
#The WebServlet did not close the database when un-deploying the web application.
#The WebServlet did not close the database when un-deploying the web application.
@changelog_1325_li
@changelog_1327_li
#The exception message of failed INSERT or MERGE statements now includes all values and the row number.
#The exception message of failed INSERT or MERGE statements now includes all values and the row number.
@changelog_1326_li
@changelog_1328_li
#If opening a database failed with an out of memory exception, some files were not closed.
#If opening a database failed with an out of memory exception, some files were not closed.
@changelog_1327_li
@changelog_1329_li
#Optimizer: the expected runtime calculation was incorrect. The fixed calculation should give slightly better query plans when using many joins.
#Optimizer: the expected runtime calculation was incorrect. The fixed calculation should give slightly better query plans when using many joins.
@changelog_1328_li
@changelog_1330_li
#Improved exception message when connecting to a just started server fails.
#Improved exception message when connecting to a just started server fails.
@changelog_1329_li
@changelog_1331_li
#Connection.isValid is a bit faster.
#Connection.isValid is a bit faster.
@changelog_1330_li
@changelog_1332_li
#H2 Console: the autocomplete feature has been improved a bit. It can now better parse conditions.
#H2 Console: the autocomplete feature has been improved a bit. It can now better parse conditions.
@changelog_1331_li
@changelog_1333_li
#When restarting a web application in Tomcat, an exception was thrown sometimes. In most cases this was a NullPointerException. A workaround in H2 has been implemented. The root cause of the problem is now documented in the FAQ: Tomcat sets all static fields (final or non-final) to null when unloading a web application. A workaround is to put the h2.jar in the lib directory, or set the system property org.apache.catalina.loader.WebappClassLoader.ENABLE_CLEAR_REFERENCES to false.
#When restarting a web application in Tomcat, an exception was thrown sometimes. In most cases this was a NullPointerException. A workaround in H2 has been implemented. The root cause of the problem is now documented in the FAQ: Tomcat sets all static fields (final or non-final) to null when unloading a web application. A workaround is to put the h2.jar in the lib directory, or set the system property org.apache.catalina.loader.WebappClassLoader.ENABLE_CLEAR_REFERENCES to false.
@changelog_1332_h2
@changelog_1334_h2
#Version 1.1.107 (2009-01-24)
#Version 1.1.107 (2009-01-24)
@changelog_1333_li
@changelog_1335_li
#Some DatabaseMetaData operations did not work for non-admin users for versions 1.1.x.
#Some DatabaseMetaData operations did not work for non-admin users for versions 1.1.x.
@changelog_1334_li
@changelog_1336_li
#The MySQL compatibility extension fromUnixTime now used the English locale.
#The MySQL compatibility extension fromUnixTime now used the English locale.
@changelog_1335_li
@changelog_1337_li
#When using LOG=2 and repeatedly updating the last row rows of a table, the index file grew quickly.
#When using LOG=2 and repeatedly updating the last row rows of a table, the index file grew quickly.
@changelog_1336_li
@changelog_1338_li
#In versions 1.1.105 and 1.1.106, encrypted script files of earlier versions could not be processed. This is now again possible. The problem was that such script files were stored in a special format (STORAGE=TEXT) but support for this format was removed in version 1.1.105.
#In versions 1.1.105 and 1.1.106, encrypted script files of earlier versions could not be processed. This is now again possible. The problem was that such script files were stored in a special format (STORAGE=TEXT) but support for this format was removed in version 1.1.105.
@changelog_1337_li
@changelog_1339_li
#Enabling the trace mechanism by creating a specially named file is no longer supported.
#Enabling the trace mechanism by creating a specially named file is no longer supported.
@changelog_1338_h2
@changelog_1340_h2
#Version 1.1.106 (2009-01-04)
#Version 1.1.106 (2009-01-04)
@changelog_1339_li
@changelog_1341_li
#Statement.setQueryTimeout did not work correctly for some statements.
#Statement.setQueryTimeout did not work correctly for some statements.
@changelog_1340_li
@changelog_1342_li
#CREATE DOMAIN: built-in data types can now only be changed if no tables exist.
#CREATE DOMAIN: built-in data types can now only be changed if no tables exist.
@changelog_1341_li
@changelog_1343_li
#Linked tables: a workaround for Oracle DATE columns has been implemented.
#Linked tables: a workaround for Oracle DATE columns has been implemented.
@changelog_1342_li
@changelog_1344_li
#DatabaseMetaData.getPrimaryKeys: the column PK_NAME now contains the constraint name instead of the index name (compatibility for PostgreSQL and Derby).
#DatabaseMetaData.getPrimaryKeys: the column PK_NAME now contains the constraint name instead of the index name (compatibility for PostgreSQL and Derby).
@changelog_1343_li
@changelog_1345_li
#Using IN(..) inside a IN(SELECT..) did not always work.
#Using IN(..) inside a IN(SELECT..) did not always work.
@changelog_1344_li
@changelog_1346_li
#Views with IN(..) that used a view itself did not work.
#Views with IN(..) that used a view itself did not work.
@changelog_1345_li
@changelog_1347_li
#Union queries with LIMIT or ORDER BY that are used in a view or subquery did not work.
#Union queries with LIMIT or ORDER BY that are used in a view or subquery did not work.
@changelog_1346_li
@changelog_1348_li
#The license change a bit: so far the license was modified to say 'Swiss law'. This is now changed back to the original 'US law'. This was requested by a user, and I don't see a problem.
#The license change a bit: so far the license was modified to say 'Swiss law'. This is now changed back to the original 'US law'. This was requested by a user, and I don't see a problem.
@changelog_1347_li
@changelog_1349_li
#Constraints for local temporary tables now session scoped. So far they were global. Thanks a lot to Eric Faulhaber for finding and fixing this problem!
#Constraints for local temporary tables now session scoped. So far they were global. Thanks a lot to Eric Faulhaber for finding and fixing this problem!
@changelog_1348_li
@changelog_1350_li
#When using the auto-server mode, and if the lock file was modified in the future, the wrong exception was thrown ('Connection is broken' instead of 'Error opening database: lock file modified in the future').
#When using the auto-server mode, and if the lock file was modified in the future, the wrong exception was thrown ('Connection is broken' instead of 'Error opening database: lock file modified in the future').
@cheatSheet_1000_h1
@cheatSheet_1000_h1
...
@@ -4694,7 +4703,7 @@ SimpleResultSetを使用する
...
@@ -4694,7 +4703,7 @@ SimpleResultSetを使用する
キャッシュの設定
キャッシュの設定
@features_1614_p
@features_1614_p
# The database keeps most frequently used data and index pages in the main memory. The amount of memory used for caching can be changed using the setting <code>CACHE_SIZE</code>. This setting can be set in the database connection URL (<code>jdbc:h2:~/test;CACHE_SIZE=131072</code>), or it can be changed at runtime using <code>SET CACHE_SIZE size</code>.
# The database keeps most frequently used data and index pages in the main memory. The amount of memory used for caching can be changed using the setting <code>CACHE_SIZE</code>. This setting can be set in the database connection URL (<code>jdbc:h2:~/test;CACHE_SIZE=131072</code>), or it can be changed at runtime using <code>SET CACHE_SIZE size</code>. This setting has no effect for in-memory databases.
@features_1615_p
@features_1615_p
# Also included is an experimental second level soft reference cache. Rows in this cache are only garbage collected on low memory. By default the second level cache is disabled. To enable it, use the prefix <code>SOFT_</code>. Example: <code>jdbc:h2:~/test;CACHE_TYPE=SOFT_LRU</code>. The cache might not actually improve performance. If you plan to use it, please run your own test cases first.
# Also included is an experimental second level soft reference cache. Rows in this cache are only garbage collected on low memory. By default the second level cache is disabled. To enable it, use the prefix <code>SOFT_</code>. Example: <code>jdbc:h2:~/test;CACHE_TYPE=SOFT_LRU</code>. The cache might not actually improve performance. If you plan to use it, please run your own test cases first.
...
@@ -9517,13 +9526,16 @@ H2 コンソール アプリケーション
...
@@ -9517,13 +9526,16 @@ H2 コンソール アプリケーション
@roadmap_1437_li
@roadmap_1437_li
#UNION: evaluate INTERSECT before UNION (like most other database except Oracle).
#UNION: evaluate INTERSECT before UNION (like most other database except Oracle).
@roadmap_1438_h2
@roadmap_1438_li
#Delay creating the information schema, and share metadata columns.
@roadmap_1439_h2
#Not Planned
#Not Planned
@roadmap_1439_li
@roadmap_1440_li
#HSQLDB (did) support this: select id i from test where i<0 (other databases don't). Supporting it may break compatibility.
#HSQLDB (did) support this: select id i from test where i<0 (other databases don't). Supporting it may break compatibility.
@roadmap_1440_li
@roadmap_1441_li
#String.intern (so that Strings can be compared with ==) will not be used because some VMs have problems when used extensively.
#String.intern (so that Strings can be compared with ==) will not be used because some VMs have problems when used extensively.
