The wrong exception was thrown when trying to connect to a server if the server was not running.
@changelog_1003_h2
@changelog_1003_li
UNION queries where the first query contains a nested query were parsed incorrectly. Example: "select 1 from (select 2 from dual) union select 3 from dual" was parsed as "select 1 from ((select 2 from dual) union select 3 from dual)". Fixed.
@changelog_1004_h2
Version 1.2.138 (2010-06-27)
@changelog_1004_li
@changelog_1005_li
Referential integrity: it was not allowed to delete a row with NULL in the parent table, if there was a row with NULL in the child table.
@changelog_1005_li
@changelog_1006_li
Experimental feature to support case sensitive catalog names and database names using the DATABASE() method. To use this feature, set the system property h2.databaseToUpper to false. The plan is to set the property to false by default in version 1.3.x. Issue 204 - thanks to Sylvain Cuaz (ILM Informatique) for the patch.
@changelog_1006_li
@changelog_1007_li
Experimental feature to support nested joins. To enable, set the system property h2.nestedJoins to true. If enabled, nested joins and right outer joins should work as expected (issues 145, 177, and 203). The plan is to enable this feature by default in version 1.3.x.
@changelog_1007_li
@changelog_1008_li
New sample application: CachedPreparedStatements.
@changelog_1008_li
@changelog_1009_li
When creating functions within a schema, those functions could not be used in views, nested queries, and constraints. Fixed.
@changelog_1009_li
@changelog_1010_li
The benchmarks have been run using recent database versions.
@changelog_1010_li
@changelog_1011_li
Version 1.2.137 could still not be converted to Java 1.4 (because the Retrotranslator doesn't support BigDecimal.precision).
@changelog_1011_li
@changelog_1012_li
Cluster: non-admin users could not connect when one of the cluster node was stopped. Issue 206.
@changelog_1012_li
@changelog_1013_li
DROP VIEW now supports the CASCADE and RESTRICT clauses (patch from Kerry Sainsbury)
@changelog_1013_li
@changelog_1014_li
CREATE VIEW now supports the OR REPLACE clause (patch from Kerry Sainsbury)
@changelog_1014_li
@changelog_1015_li
Build tool: ability to only run one test using the -Dtest=className setting. eg: build -Dtest=org.h2.test.db.TestViewDropView test (patch from Kerry Sainsbury).
@changelog_1015_h2
@changelog_1016_h2
Version 1.2.137 (2010-06-06)
@changelog_1016_li
@changelog_1017_li
Statements with a nested query and a condition that was always NULL threw an IndexOutOfBoundsException. Example: select * from (select null as x) where x=1
@changelog_1017_li
@changelog_1018_li
Experimental feature to support very large transactions (except when using MVCC). To enable, set the system property h2.largeTransactions to true. If enabled, changes to tables without a primary key can be buffered to disk. The plan is to enable this feature by default in version 1.3.x.
@changelog_1018_li
@changelog_1019_li
H2 Console: editing result sets is now also working for database other than H2, if they do support updatable result sets. Add "@edit" before the query. Only limited testing has been done on this feature, some data types may not work (please provide feedback if you find issues).
@changelog_1019_li
@changelog_1020_li
Cluster: an open transaction was committed when a cluster node was stopped (because disabling the cluster executes SET CLUSTER '', which committed the transaction). Transaction are no longer committed when calling SET CLUSTER. Issue 199.
@changelog_1020_li
@changelog_1021_li
Cluster: non-admin users couldn't connect to the cluster and couldn't disable the cluster. Issue 201.
@changelog_1021_li
@changelog_1022_li
Cluster: NEXTVAL('sequence') was only called on one cluster node, therefore sequence values could get out of sync.
@changelog_1022_li
@changelog_1023_li
Version 1.2.136 could not be converted to Java 1.4 (because the Retrotranslator doesn't support BigDecimal.precision). A workaround has been implemented.
@changelog_1023_li
@changelog_1024_li
The error code of IO exceptions in CSV functions was incorrect.
@changelog_1024_li
@changelog_1025_li
The TriggerPassData example now uses a prefix (the database name).
@changelog_1025_li
@changelog_1026_li
The wrong exception was thrown when trying to reference a table that doesn't support references such as a table in the information schema.
@changelog_1026_li
@changelog_1027_li
Server.shutdownTcpServer can now stop all TCP servers on this JVM.
@changelog_1027_li
@changelog_1028_li
JdbcConnectionPool: the default connection timeout is now 30 seconds (it used to be 5 minutes).
@changelog_1028_li
@changelog_1029_li
LOB storage: LOBs added with "h2.lobInDatabase" enabled couldn't be read later with this option disabled.
@changelog_1029_h2
@changelog_1030_h2
Version 1.2.136 (2010-05-24)
@changelog_1030_li
@changelog_1031_li
When using ORDER BY and there are both ascending and descending indexes, the database used the first index even when the second one could be used for sorting.
@changelog_1031_li
@changelog_1032_li
Conditions of the form columnName IS NULL now use an index. To disable this feature, set the system property h2.optimizeIsNull to false.
@changelog_1032_li
@changelog_1033_li
H2 Console: when the settings were not stored yet (for example when running for the first time), the last recently used settings were not stored. A workaround was to create the file ".h2.server.properties" manually in the current user home directory, with the contents: webAllowOthers=false, webPort=8082, webSSL=false, 0=Generic H2 (Embedded)|org.h2.Driver|jdbc\:h2\:~/test|sa (where a comma is a newline).
@changelog_1033_li
@changelog_1034_li
The source code is now switched to Java 6 (JDK 1.6) by default. Java 5 (JDK 1.5) is still supported, and the jar file is still compiled for Java 5.
@changelog_1034_li
@changelog_1035_li
The BOM (the byte-order-mark) character 0xfeff at the beginning of the file is ignored. This is for compatibility with Microsoft Excel.
@changelog_1035_li
@changelog_1036_li
When opening an existing database, the cache size is set to at most half the amount of memory available for the virtual machine (Runtime.getRuntime().maxMemory()), even if the cache size setting stored in the database is larger. Setting the cache size in the database URL or explicitly using SET CACHE_SIZE overrides this value (even if larger than the physical memory).
@changelog_1036_li
@changelog_1037_li
INFORMATION_SCHEMA.SETTINGS: the cache size is now returned in KB.
@changelog_1037_li
@changelog_1038_li
New system property h2.selectForUpdateMvcc, the default is false (the feature is disabled). When enabled, SELECT ... FOR UPDATE only locks the selected rows in the MVCC mode. Aggregate or GROUP BY queries are not allowed in this case.
@changelog_1038_li
@changelog_1039_li
Profiler: improved message if there was no stack trace.
@changelog_1039_li
@changelog_1040_li
The H2 Console can now be used within another application, in a frame or iframe. Issue 197.
@changelog_1040_li
@changelog_1041_li
Recover tool: the statistics section now includes page type counts again.
@changelog_1041_li
@changelog_1042_li
Queries with multiple IN(...) conditions sometimes return the wrong results when there was a multi-column index for the column.
@changelog_1042_li
@changelog_1043_li
Queries with IN(..., NULL) did sometimes return the wrong results when there was a index for the column.
@changelog_1043_li
@changelog_1044_li
DECIMAL: faster precision and memory usage calculations.
@changelog_1044_li
@changelog_1045_li
A new class org.h2.tools.TriggerAdapter allows to use the ResultSet interface within trigger implementations.
@changelog_1045_li
@changelog_1046_li
A subselect which used an index could lead to wrong results. Fixed.
@changelog_1046_li
@changelog_1047_li
Creating a cached temporary non persistent table with a primary key threw a NullPointerException.
@changelog_1047_h2
@changelog_1048_h2
Version 1.2.135 (2010-05-08)
@changelog_1048_li
@changelog_1049_li
Temporary files were not deleted when using large transactions, disabling autocommit, and closing the session without committing.
@changelog_1049_li
@changelog_1050_li
Queries using multiple IN(..) conditions on the same table could cause repeated rows in the result set.
@changelog_1050_li
@changelog_1051_li
Translation: Lubomir Grajciar translated the H2 Console as well as all error message to Slovensky. Thanks a lot!
@changelog_1051_li
@changelog_1052_li
There was a possible Java level deadlock when opening an uninitialized database and using a file system that also opened a database.
@changelog_1052_li
@changelog_1053_li
When killing the process while the database was writing a checkpoint, while it was closing, or while running recovery (while removing temporary tables from a previous run), the database could become corrupt. A new test case has been implemented to ensure such problems can not occur in the future.
@changelog_1053_li
@changelog_1054_li
File system: new method FileSystem.setReadOnly.
@changelog_1054_li
@changelog_1055_li
The page size for new databases can now be set in the database URL using ;PAGE_SIZE=512. Currently this feature is only used to simplify testing.
@changelog_1055_li
@changelog_1056_li
New system property h2.functionsInSchema (default is false). If enabled, the SCRIPT statement always includes the schema name in the CREATE ALIAS statement (even if the schema is PUBLIC). This is not backward compatible with H2 versions 1.2.134 and older.
@changelog_1056_li
@changelog_1057_li
Functions: it is no longer required to add a space after a comma in the parameter list. Example: CREATE ALIAS PARSE_INT FOR "java.lang.Integer.parseInt(java.lang.String,int)"
@changelog_1057_li
@changelog_1058_li
Functions now reside within a schema, similar to sequences. If you do create such functions in schemas other than PUBLIC, then the database can not be opened with older versions of H2.
@changelog_1058_li
@changelog_1059_li
Cluster: after a cluster node failed, the second cluster node can now be re-created and started without having to stop the first cluster node, and without having to stop running applications. To do that, append ;AUTO_RECONNECT=TRUE to the database URL.
@changelog_1059_li
@changelog_1060_li
Auto-reconnect: if another connection uses the database in exclusive mode then this connection will try to re-connect until the exclusive mode ends. This is important when using the cluster mode.
@changelog_1060_li
@changelog_1061_li
SET EXCLUSIVE now supports 0 (disable), 1 (enable), and 2 (enable and close all other connections).
@changelog_1061_li
@changelog_1062_li
Installing the H2 as a service should now work on Windows 7. The batch files now explicitly set the directory using pushd "%~dp0".
@changelog_1062_li
@changelog_1063_li
Temporary tables can now be 'cached', that means indexes of temporary tables can be persisted. This enables very large temporary tables (both local and global).
@changelog_1063_li
@changelog_1064_li
The CreateCluster tool now sets the source database in exclusive mode before copying data to the new database.
@changelog_1064_li
@changelog_1065_li
The H2 Console now stream results one statement / result set at a time (using chunked transfer encoding). To disable, set the system property h2.consoleStream to false. This feature is not supported when using a servlet container.
@changelog_1065_li
@changelog_1066_li
The H2 Console did not call the CreateCluster tool with the correctly escaped parameters.
@changelog_1066_li
@changelog_1067_li
Improved PostgreSQL compatibility for ALTER TABLE ALTER COLUMN.
@changelog_1067_li
@changelog_1068_li
Commas at the end of INSERT ... VALUES (), (), are now supported.
@changelog_1068_li
@changelog_1069_li
The H2 Console "Start Browser" button now works even when the IP address changes while the tool runs (for example, because a wireless connection breaks, or when enabling / disabling the network connection).
@changelog_1069_li
@changelog_1070_li
When casting from float or double to BigDecimal, the result was sometimes unexpected, because "new BigDecimal(double val)" was used. Now "BigDecimal.valueOf(double val)" and "new BigDecimal(Float.toString(f))" are used. But it is still not recommended to use float or double for currency values (see data type documentation).
@changelog_1070_li
@changelog_1071_li
Global temporary tables are now deleted when closing the database. Before, they were deleted when opening the database the next time.
@changelog_1071_li
@changelog_1072_li
UNIQUE was not listed as a keyword.
@changelog_1072_li
@changelog_1073_li
Improved error message when an non-SQL-exception occurred in a user defined function. The method name and parameters are included in the error message.
@changelog_1073_li
@changelog_1074_li
For some queries, the exception did not include the SQL statement. Example: select x from system_range(1, 2) group by 'a'.
@changelog_1074_li
@changelog_1075_li
The Shell tool will execute SQL statements passed as using the command line parameter -sql.
@changelog_1075_li
@changelog_1076_li
If InetAddress.getLocalHost() fails, the database should now throw an exception.
@changelog_1076_li
@changelog_1077_li
New columns INFORMATION_SCHEMA.INDEXES.INDEX_CLASS and INFORMATION_SCHEMA.TABLES.TABLE_CLASS.
@changelog_1077_li
@changelog_1078_li
INFORMATION_SCHEMA.INDEXES.SQL now contains the CREATE INDEX statement instead of just the fully qualified index name.
@changelog_1078_h2
@changelog_1079_h2
Version 1.2.134 (2010-04-23)
@changelog_1079_li
@changelog_1080_li
New system property h2.analyzeAuto (default 0 meaning disabled) to automatically run ANALYZE after that many changes to a table. For details, see the Javadoc of this system property. The plan is to set this property to 2000 in version 1.3.x.
@changelog_1080_li
@changelog_1081_li
JdbcXAConnection.start() does not support TMJOIN. Issue 189.
@changelog_1081_li
@changelog_1082_li
MySQL compatibility: TIMESTAMPDIFF is now an alias for DATEDIFF.
@changelog_1082_li
@changelog_1083_li
MERGE did not respect foreign key and check constraints.
@changelog_1083_li
@changelog_1084_li
ALTER TABLE ALTER COLUMN: changing the data type of a column no longer makes it nullable.
@changelog_1084_li
@changelog_1085_li
When using AUTO_SERVER=TRUE, the server is now started as a daemon thread. This was a problem when using Tomcat and a connection pool.
@changelog_1085_li
@changelog_1086_li
Servers can now be started as a daemon thread using the command line options -tcpDaemon, -pgDaemon, and -webDaemon.
@changelog_1086_li
@changelog_1087_li
H2 Console: the built-in commands are now documented.
@changelog_1087_li
@changelog_1088_li
REPLACE: if any parameter is null, the result is null.
@changelog_1088_li
@changelog_1089_li
Queries with DISTINCT and ORDER BY will now use the index on ORDER BY if possible. This is specially important for queries used inside IN(SELECT ...).
@changelog_1089_li
@changelog_1090_li
The new statement EXPLAIN ANALYZE executes the statement, and displays the query plan with the actual row scan count for each table.
@changelog_1090_li
@changelog_1091_li
H2 Console: the auto-complete feature didn't quote column names that need quoting. Issue 186.
@changelog_1091_li
@changelog_1092_li
The experimental LOB storage mechanism now supports all features of the old one. To use it, set the system property "h2.lobInDatabase" to "true". If you have used this feature in version 1.2.133, you need to export and re-import the database using SCRIPT / RUNSCRIPT.
@changelog_1092_li
@changelog_1093_li
The functions isBeforeFirst() and isAfterLast() were not compliant to the JDBC spec. If the ResultSet contains no rows, they must return false. Fixed.
@changelog_1093_li
@changelog_1094_li
Filesystem parameters like "split:" didn't work in server mode with baseDir set.
@changelog_1094_li
@changelog_1095_li
If baseDir is set, and a database name is given which points to a directory outside the baseDir (eg. "../dbname"), an exception is thrown.
@changelog_1095_h2
@changelog_1096_h2
Version 1.2.133 (2010-04-10)
@changelog_1096_li
@changelog_1097_li
A new experimental LOB storage mechanism is available. When enabled, CLOB and BLOB data is stored in hidden tables in the database. To use it, set the system property "h2.lobInDatabase" to "true". Compression is not yet implemented. Duplicate objects are only stored once. Usually writing is slower, but reading is faster (mainly because of caching).
@changelog_1097_li
@changelog_1098_li
The Shell tool threw a NumberFormatException on a empty statement.
@changelog_1098_li
@changelog_1099_li
The h2small-*.jar did not support "drop all objects delete files". Now it is supported (the DeleteDbFiles tool is now included).
@changelog_1099_li
@changelog_1100_li
Operations that don't fit in memory are now faster. Temporary file handling was changed.
@changelog_1100_li
@changelog_1101_li
The default maximum log stream size is now 2 MB. This is a good value according to some performance tests.
@changelog_1101_li
@changelog_1102_li
New system property "h2.syncMethod" to configure what method to call when closing the database, on checkpoint, and on CHECKPOINT SYNC. The default is "sync" which calls RandomAccessFile.getFD().sync().
@changelog_1102_li
@changelog_1103_li
ROWNUM could not be used for pagination. The follow query returned no rows: select x from (select *, rownum as r from system_range(1, 3)) where r=2;
@changelog_1103_li
@changelog_1104_li
Workaround for a java.sql.Date issue: years above 9999 are not formatted correctly. When calling ResultSet.getString() on a date value, an alternative formatting algorithm is used.
@changelog_1104_li
@changelog_1105_li
Prepared statements with nested subqueries did not always return the correct result. Example: select ?, ?, (select count(*) from test t, (select id from test where 0=?) t2 where t2.id=t.id) from test
@changelog_1105_li
@changelog_1106_li
When using MULTI_THREADED=TRUE, the exception following exception could be thrown: "object already exists: TABLES"
@changelog_1106_li
@changelog_1107_li
Comparison of integer columns against float numbers was not always correct. Issue 182.
@changelog_1107_li
@changelog_1108_li
H2 Console: Editing the result of a multi-line queries failed. Issue 183.
@changelog_1108_li
@changelog_1109_li
H2 Console: if the settings file (.h2.properties) can't be accessed, the exception is now ignored.
@changelog_1109_h2
@changelog_1110_h2
Version 1.2.132 (2010-03-21)
@changelog_1110_li
@changelog_1111_li
The implementation of a Java to C (source code level) converter has been started. The plan is: it should be possible to convert H2 (or a part of it) to C so that the database can be run without a JVM. This will be a long term project (it may take a year or so).
@changelog_1111_li
@changelog_1112_li
User defined table implementation can now be used using CREATE TABLE ... ENGINE. Thanks to Sergi Vladykin for implementing this feature!
@changelog_1112_li
@changelog_1113_li
Improved MS SQL Server compatibility: support string concatenation using "+". Thanks to Stepan for the patch!
@changelog_1113_li
@changelog_1114_li
When using the multi-threaded mode, running ANALYZE concurrently in multiple connections could throw an exception.
@changelog_1114_li
@changelog_1115_li
The MERGE statement is now about 30% faster when using a PreparedStatement.
@changelog_1115_li
@changelog_1116_li
Multi-column indexes where the second or later column was descending did not always produce correct results (rows were missing in the result set, or the result set was empty).
@changelog_1116_li
@changelog_1117_li
When using large transactions or a small log size, the database could get very slow (profiling shows the hotspot is in FileObjectDisk.sync()).
@changelog_1117_li
@changelog_1118_li
The Shell tool now prints the stack trace when the list mode is enabled.
@changelog_1118_li
@changelog_1119_li
CREATE ALIAS ... AS: Compilation was incorrect if the source code contained characters that are not supported by the default file encoding.
@changelog_1119_li
@changelog_1120_li
Issue 176: the JdbcDataSource now also supports a 'description' property.
@changelog_1120_li
@changelog_1121_li
The Shell tool threw a ArrayIndexOutOfBoundsException after 20 statements.
@changelog_1121_li
@changelog_1122_li
When using the small version of H2 ('jarClient'), the first call to Connection.createBlob (or similar) could throw a ClassNotFoundException because the file org.h2.store.fs.FileSystemZip is not included. This missing class is now ignored.
@changelog_1122_li
@changelog_1123_li
Literals of type BIGINT now have the correct data type.
@changelog_1123_h2
@changelog_1124_h2
Version 1.2.131 (2010-03-05)
@changelog_1124_li
@changelog_1125_li
Older versions of H2 (version 1.2.127 and older) could not connect to a new version (version 1.2.129 and newer). The connection blocked when trying to connect. Now the connection no longer blocks, instead a SQL exception is thrown.
@changelog_1125_li
@changelog_1126_li
In versions 1.2.129 and 1.2.130, a database could not be opened sometimes after dropping tables or indexes, and then creating new indexes for existing tables. The exception contained the text "parent not found" (version 1.2.129) or "Table not found" (version 1.2.130).
@changelog_1126_li
@changelog_1127_li
After the database was closed, a null pointer exception could occur in Database.flush.
@changelog_1127_li
@changelog_1128_li
An ArrayIndexOutOfBoundsException could occur in the page store (eg. on "delete from table"). Fixed.
@changelog_1128_h2
@changelog_1129_h2
Version 1.2.130 (2010-02-26)
@changelog_1129_li
@changelog_1130_li
EXPLAIN: The query plan now contains ".tableScan" if a table scan is used.
@changelog_1130_li
@changelog_1131_li
IN(..): when combining and IN(..) condition with a condition that didn't use an index, the result could contain duplicate rows.
@changelog_1131_li
@changelog_1132_li
IN(..): the index was not used if there were multiple IN(..) conditions.
@changelog_1132_li
@changelog_1133_li
For foreign key constraints, the metadata column INFORMATION_SCHEMA.INDEXES.CONSTRAINT_NAME was not set for non-unique indexes.
@changelog_1133_li
@changelog_1134_li
PostgreSQL compatibility: when using the following exception was thrown: Column "T.TYPTYPMOD" not found. Fixed. This is only when using psqlodbc_08_04*.
@changelog_1134_li
@changelog_1135_li
A tool to migrate an old database from the non-page store format to the newest version has been added in src/tools/org/h2/dev/util/Migrate.java. This file is not included in the jar file currently.
@changelog_1135_li
@changelog_1136_li
When using temporary tables, the database didn't shrink sometimes when closing. Also, sometimes a database could not recover normally.
@changelog_1136_li
@changelog_1137_li
Large transactions could run out of heap space. The maximum size of a transaction is now much larger.
@changelog_1137_li
@changelog_1138_li
The default setting for the system property h2.webMaxValueLength is now 100000 (it was 10000 before).
@changelog_1138_li
@changelog_1139_li
Creating a database was delayed about 2 seconds if the directory didn't exist.
@changelog_1139_li
@changelog_1140_li
Implemented INIT feature. If the database URL contains ";INIT=...;" then the DDL or DML commands following are executed on startup. Example URL: jdbc:h2:mem:test;INIT=RUNSCRIPT FROM '~/create.sql' (patch from Kerry Sainsbury).
@changelog_1140_h2
@changelog_1141_h2
Version 1.2.129 (2010-02-19)
@changelog_1141_li
@changelog_1142_li
The methods of the CloseListener are added to the Trigger interface. The interface CloseListener is removed. This is potentially a breaking change for existing triggers.
@changelog_1142_li
@changelog_1143_li
CREATE ALIAS: error message when compiling Java code have been improved.
@changelog_1143_li
@changelog_1144_li
MVCC: creating a table with an incorrect constraint could cause strange errors.
@changelog_1144_li
@changelog_1145_li
Hash indexes now are only used for single column indexes.
@changelog_1145_li
@changelog_1146_li
The cache types WEAK_* and TQ are no longer supported. A weak reference cache never frees up memory so it's the same as having a very large cache size. The TQ cache was not included in the jar file since a longer time, and was not tested.
@changelog_1146_li
@changelog_1147_li
The file system abstraction no longer throws SQL exceptions.
@changelog_1147_li
@changelog_1148_li
DatabaseEventListener.diskSpaceIsLow has changed.
@changelog_1148_li
@changelog_1149_li
The CompressTool no longer throw as SQL exceptions. Instead, it throws runtime exceptions.
@changelog_1149_li
@changelog_1150_li
SimpleResultSet.addColumn and addRow now can throw a IllegalStateException instead of a SQLException.
@changelog_1150_li
@changelog_1151_li
When doing an index lookup, decimal values with the same value but different scale (for example 0.00 and 0.0) where not considered equal in version 1.2.128. Now they are (unlike BigDecimal.equals()).
@changelog_1151_li
@changelog_1152_li
The BNF parser now uses the visitor pattern.
@changelog_1152_li
@changelog_1153_li
Converting a UUID to bytes was incorrect. Because of that, updatable result sets on tables with UUID primary key did not work.
@changelog_1153_li
@changelog_1154_li
The database URL property DATABASE_EVENT_LISTENER_OBJECT is no longer supported (there are problems passing objects when the PostgreSQL driver is installed as well).
@changelog_1154_li
@changelog_1155_li
H2 Console: asynchronous login (using a DatabaseEventListener) is no longer supported.
@changelog_1155_li
@changelog_1156_li
A workaround for a Windows socket problem has been implemented. Thanks a lot to Sergi Vladykin.
@changelog_1156_li
@changelog_1157_li
The Recover tool did not convert correctly convert CLOB data with non-ASCII characters.
@changelog_1157_li
@changelog_1158_li
Tools: the method run(String... args) has been renamed to runTool(String... args).
@changelog_1158_li
@changelog_1159_li
Server.startWebServer(Connection) was not working as expected.
@changelog_1159_li
@changelog_1160_li
The database URL option ACCESS_MODE_LOG is no longer supported.
@changelog_1160_li
@changelog_1161_li
The database URL option RECOVER has currently no effect.
@changelog_1161_li
@changelog_1162_li
Converting an old (non-page store) database is no longer supported using this version.
@changelog_1162_li
@changelog_1163_li
The following system properties are no longer supported: h2.overflowExceptions, h2.optimizeDropDependencies, h2.optimizeGroupSorted, h2.optimizeMinMax, h2.optimizeNot, h2.optimizeIn, h2.optimizeInJoin, h2.reuseSpace*. Most of then were there for a long time, but always with the same value. There was no unit test with the other value. So changing them was potentially dangerous (not a lot, but still).
@changelog_1163_li
@changelog_1164_li
The setting LOG has currently no effect (it only had an effect when the page store was disabled).
@changelog_1164_li
@changelog_1165_li
Disabling the page store is no longer supported. The old storage mechanism has been removed, shrinking the jar file size by almost 10%.
@changelog_1165_li
@changelog_1166_li
The translated resources are now stored in UTF-8 format.
@changelog_1166_li
@changelog_1167_li
The Windows service wrapper now detects if multiple versions of H2 are installed.
@changelog_1167_h2
@changelog_1168_h2
Version 1.2.128 (2010-01-30)
@changelog_1168_li
@changelog_1169_li
There are known errors on rollback when the page store is disabled and at the same time MVCC is used. See http://code.google.com/p/h2database/issues/detail?id=158
@changelog_1169_li
@changelog_1170_li
The DeleteDbFiles tool deleted all files in the .lob.db directory, even files that didn't belong to the database.
@changelog_1170_li
@changelog_1171_li
Automatic conversion of old databases to the page store format failed if the database contained LOB files.
@changelog_1171_li
@changelog_1172_li
Nested subqueries didn't work for INSERT INTO and IN(..). Example: insert into test ((select 1));
@changelog_1172_li
@changelog_1173_li
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_1173_li
@changelog_1174_li
Less classes are loaded when using the database in embedded mode.
@changelog_1174_li
@changelog_1175_li
The information schema tables are only initialized when needed. This reduces memory usage and speeds up creating in-memory databases. Each in-memory database needs about 8 KB of heap memory.
@changelog_1175_li
@changelog_1176_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;
@changelog_1176_li
@changelog_1177_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).
@changelog_1177_li
@changelog_1178_li
Improved PostgreSQL compatibility (support SHOW DEFAULT_TRANSACTION_ISOLATION).
@changelog_1178_li
@changelog_1179_li
Documentation: the javadocs for Csv.write and read used the wrong default charset.
@changelog_1179_li
@changelog_1180_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.
@changelog_1180_li
@changelog_1181_li
If a FOR UPDATE query was executed twice (using a PreparedStatement), the table was not locked.
@changelog_1181_li
@changelog_1182_li
Triggers: INSTEAD OF triggers are now supported. Such triggers can be defined on views.
@changelog_1182_li
@changelog_1183_li
New system property h2.identifiersToUpper. If set to false, identifiers in SQL statements are case sensitive even if they are not quoted.
@changelog_1183_li
@changelog_1184_li
Slightly improved performance if the table is already locked.
@changelog_1184_li
@changelog_1185_li
CompressLZF: faster decompression.
@changelog_1185_li
@changelog_1186_li
PgServer: the wrong size was sent for VARCHAR data. Thanks again to Sergi Vladykin for the patch.
@changelog_1186_li
@changelog_1187_li
Serialized access mode (server-less multi-connection mode): fixed getGeneratedKeys() for sequences.
@changelog_1187_h2
@changelog_1188_h2
Version 1.2.127 (2010-01-15)
@changelog_1188_li
@changelog_1189_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).
@changelog_1189_li
@changelog_1190_li
Page store: new databases can not be opened with older versions.
@changelog_1190_li
@changelog_1191_li
Page store: adding data to new database is now faster.
@changelog_1191_li
@changelog_1192_li
File system: getting the file name from a path is now faster. This should speed up BLOB and CLOB access.
@changelog_1192_li
@changelog_1193_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!
@changelog_1193_li
@changelog_1194_li
SHOW COLUMNS did not work correctly if there where multiple indexes on the same columns.
@changelog_1194_li
@changelog_1195_li
Page store: the wrong write count was written to the database header. This could cause the server-less multi-connection mode to fail.
@changelog_1195_li
@changelog_1196_li
Result sets larger than 2 GB threw an exception "Negative seek offset". Fixed.
@changelog_1196_li
@changelog_1197_li
If the system property h2.check was set to false, an ArrayIndexOutOfBoundsException could occur.
@changelog_1197_li
@changelog_1198_li
Alter table is now supported even if a table has views defined. (Patch from Kerry Sainsbury).
@changelog_1198_li
@changelog_1199_li
Fulltext search: exceptions within the fulltext search package had the wrong SQL state.
@changelog_1199_li
@changelog_1200_li
The Lucene fulltext search ignored transaction rollback. Fixed using a trigger on rollback.
@changelog_1200_li
@changelog_1201_li
Trigger can now be called on rollback.
@changelog_1201_li
@changelog_1202_li
The shell script h2.sh ignored command line line arguments.
@changelog_1202_li
@changelog_1203_li
When running H2 in the Google AppEngine for Java, a AccessControlException could be thrown when trying to open a read-only database. Fixed.
@changelog_1203_li
@changelog_1204_li
The user home directory prefix (~) is now only expanded when followed by a slash or backslash, or standing alone.
@changelog_1204_li
@changelog_1205_li
Native fulltext search: before inserting or deleting data, FT_INIT() had to be called. This is no longer required.
@changelog_1205_li
@changelog_1206_li
The .trace.db file is now only created if required.
@changelog_1206_li
@changelog_1207_li
Shell tool: improved PostgreSQL compatibility.
@changelog_1207_li
@changelog_1208_li
Trying to open a database in read-only mode when a .lock.db file exists will now fail with a nice error message.
@changelog_1208_li
@changelog_1209_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).
@changelog_1209_li
@changelog_1210_li
Faster data conversion from BIGINT or INT to DECIMAL.
@changelog_1210_li
@changelog_1211_li
Server-less multi-connection mode: try to delete log files if switching between read/write operations.
@changelog_1211_li
@changelog_1212_li
CompressLZF: Faster decompress and improved javadocs
@changelog_1212_h2
@changelog_1213_h2
Version 1.2.126 (2009-12-18)
@changelog_1213_li
@changelog_1214_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.
@changelog_1214_li
@changelog_1215_li
CSVREAD: when reading the column names from the CSV file, column names that contain no special characters are considered case insensitive now.
@changelog_1215_li
@changelog_1216_li
Optimization index conditions of the form 'column=NULL' (which is always false; unlike 'column IS NULL').
@changelog_1216_li
@changelog_1217_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.
@changelog_1217_li
@changelog_1218_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').
@changelog_1218_li
@changelog_1219_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').
@changelog_1219_li
@changelog_1220_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.
@changelog_1220_li
@changelog_1221_li
JaQu: the decompiler has been improved, and a few test cases already work. It is still incomplete however.
@changelog_1221_li
@changelog_1222_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).
@changelog_1222_li
@changelog_1223_li
The reserve heap memory is no longer used.
@changelog_1223_li
@changelog_1224_li
Database.checkpoint() could throw a NullPointerException.
@changelog_1224_h2
@changelog_1225_h2
Version 1.2.125 (2009-12-06)
@changelog_1225_li
@changelog_1226_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.
@changelog_1226_li
@changelog_1227_li
The shell tool now has a very simple statement history.
@changelog_1227_li
@changelog_1228_li
The zip file system implementation now supports the '~' home directory prefix. Example database URL: jdbc:h2:zip:~/test.zip!/test
@changelog_1228_li
@changelog_1229_li
Right outer joins on tables that were already 'inner joined' was processed incorrectly.
@changelog_1229_li
@changelog_1230_li
Temporary files from LOB objects were not deleted early enough when using the server mode.
@changelog_1230_li
@changelog_1231_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.
@changelog_1231_li
@changelog_1232_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.
@changelog_1232_li
@changelog_1233_li
Trigger that are called before a select statement are now supported. This allows to create tables that work like materialized views.
@changelog_1233_li
@changelog_1234_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.
@changelog_1234_li
@changelog_1235_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').
@changelog_1235_li
@changelog_1236_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).
@changelog_1236_li
@changelog_1237_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!
@changelog_1237_li
@changelog_1238_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.
@changelog_1238_li
@changelog_1239_li
The test cases don't access the file system directly, this simplifies GAE for Java testing. Thanks to Vince Bonfanti.
@changelog_1239_li
@changelog_1240_li
More bugs in the server-less multi-connection mode have been fixed.
@changelog_1240_li
@changelog_1241_li
When running against an old database, the SCRIPT statement could generate a SQL script that contained duplicate indexes (PRIMARY_KEY_E).
@changelog_1241_li
@changelog_1242_li
JdbcConnectionPool.getConnection() could throw a NullPointerException.
@changelog_1242_li
@changelog_1243_li
User defined functions: the source code is now available using SELECT SOURCE FROM INFORMATION_SCHEMA.FUNCTION_ALIASES.
@changelog_1243_li
@changelog_1244_li
User defined functions with source code didn't work after re-opening the database.
@changelog_1244_li
@changelog_1245_li
The newsfeeds are now Atom 1.0 standard compliant.
@changelog_1245_li
@changelog_1246_li
The database is now closed after an out of memory exception, because the database could get corrupt otherwise.
@changelog_1246_li
@changelog_1247_li
Better error message if both AUTO_SERVER and SERIALIZED parameters are set to TRUE.
@changelog_1247_li
@changelog_1248_li
Drop table did not delete lob files in old file store (not PAGE_STORE).
@changelog_1248_h2
@changelog_1249_h2
Version 1.2.124 (2009-11-20)
@changelog_1249_li
@changelog_1250_li
Clustering: there is now a way to detect which cluster instances are running.
@changelog_1250_li
@changelog_1251_li
ConvertTraceFile: the SQL statement statistics are better formatted (newline are removed).
@changelog_1251_li
@changelog_1252_li
The file lock thread is now stopped when the database is closed.
@changelog_1252_li
@changelog_1253_li
Issue 140: the Script tool now supports writing to a stream.
@changelog_1253_li
@changelog_1254_li
Issue 138: the trace output of Statement.execute(String, int) and executeUpdate was incorrect.
@changelog_1254_li
@changelog_1255_li
Page store: new databases can not be opened with older versions.
@changelog_1255_li
@changelog_1256_li
Page store: multi-column indexes didn't work if the cache was very small.
@changelog_1256_li
@changelog_1257_li
Page store: opening a database could theoretically result in an endless loop.
@changelog_1257_li
@changelog_1258_li
Page store: adding large indexed columns could get very slow.
@changelog_1258_li
@changelog_1259_li
Page store: after a duplicate key exception, an ArrayIndexOutOfBoundsException could be thrown (only for very large rows).
@changelog_1259_li
@changelog_1260_li
Page store: the recover tool sometimes generated a script file that contained duplicate data.
@changelog_1260_li
@changelog_1261_li
Page store: sometimes opening a read-only database failed.
@changelog_1261_li
@changelog_1262_li
Page store: opening a database sometimes failed if large rows where updated, or if a table was truncated before.
@changelog_1262_li
@changelog_1263_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.
@changelog_1263_li
@changelog_1264_li
Page store: getting the min value from a descending index with NULL entries could return the wrong result.
@changelog_1264_li
@changelog_1265_li
Page store: improved auto-recovery after power failure.
@changelog_1265_li
@changelog_1266_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.
@changelog_1266_li
@changelog_1267_li
User defined functions can be created with source code. Example: CREATE ALIAS HI AS 'String hi() { return "Hello"; }'
@changelog_1267_li
@changelog_1268_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.
@changelog_1268_li
@changelog_1269_li
Inserting LOBs got slower each time the process was restarted. It could loop endlessly after about 1000 process restarts.
@changelog_1269_li
@changelog_1270_li
Issue 117: Multi-version concurrency: concurrent MERGE statements now work.
@changelog_1270_li
@changelog_1271_li
Improved read-only database detection.
@changelog_1271_h2
@changelog_1272_h2
Version 1.2.123 (2009-11-08)
@changelog_1272_li
@changelog_1273_li
Page store: new databases can not be opened with older versions.
@changelog_1273_li
@changelog_1274_li
Page store: updating large rows (rows with more than 2000 bytes of data) could corrupt the database.
@changelog_1274_li
@changelog_1275_li
Page store: inserting very large rows failed with ArrayIndexOutOfBoundsException.
@changelog_1275_li
@changelog_1276_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.
@changelog_1276_li
@changelog_1277_li
The fulltext search methods and fields are now protected instead of private, to make the classes more easily extensible.
@changelog_1277_li
@changelog_1278_li
The Lucene fulltext search now also returns the score.
@changelog_1278_li
@changelog_1279_li
New function SCOPE_IDENTITY() to avoid problems when inserting rows in a trigger.
@changelog_1279_li
@changelog_1280_li
Statement.getGeneratedKeys() returned the wrong value if a trigger changed the identity value after inserting the row.
@changelog_1280_li
@changelog_1281_li
Improved error messages: identifiers and values are now quoted.
@changelog_1281_li
@changelog_1282_li
Improved error message when casting a value failed: the column name and type is included in the message.
@changelog_1282_li
@changelog_1283_li
Improved support for GAE for Java thanks to Vince Bonfanti.
@changelog_1283_h2
@changelog_1284_h2
Version 1.2.122 (2009-10-28)
@changelog_1284_li
@changelog_1285_li
The native fulltext search now supports streaming CLOB data.
@changelog_1285_li
@changelog_1286_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).
@changelog_1286_li
@changelog_1287_li
Dropping the current user is now allowed if another admin user exists.
@changelog_1287_li
@changelog_1288_li
Values of type BINARY or BLOB could not be converted to the data type OTHER.
@changelog_1288_li
@changelog_1289_li
SHUTDOWN COMPACT now fully compacts the database.
@changelog_1289_li
@changelog_1290_li
New system properties h2.maxCompactCount and h2.maxCompactTime to allow changing the default behavior (at most 2 seconds compacting when closing the database).
@changelog_1290_li
@changelog_1291_li
New sorted insert optimization (see Performance / Database Performance Tuning).
@changelog_1291_li
@changelog_1292_li
Issue 116: The files h2*-sources.jar and h2*-javadoc.jar are now in the Maven repository.
@changelog_1292_li
@changelog_1293_li
Page store: opening a large database was slow if it was not closed before.
@changelog_1293_li
@changelog_1294_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')
@changelog_1294_li
@changelog_1295_li
The SQL syntax is documented using (railroad) diagrams. The diagrams are HTML.
@changelog_1295_li
@changelog_1296_li
The documentation is no longer available in Japanese because the translation was too much out of sync. Please use the Google translation instead.
@changelog_1296_li
@changelog_1297_li
Certain queries were not sorted if subselect queries were involved
@changelog_1297_li
@changelog_1298_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.
@changelog_1298_h2
@changelog_1299_h2
Version 1.2.121 (2009-10-11)
@changelog_1299_li
@changelog_1300_li
Better support GaeVFS (Google App Engine Virtual File System) thanks to Thanks to Vince Bonfanti.
@changelog_1300_li
@changelog_1301_li
CSVREAD didn't close the file. Thanks to Vince Bonfanti for the patch!
@changelog_1301_li
@changelog_1302_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.
@changelog_1302_li
@changelog_1303_li
Page store bugs were fixed. Large values in indexed columns could corrupt the index.
@changelog_1303_li
@changelog_1304_li
The page store did not work when using Retrotranslator (because the Retrotranslator doesn't support Integer.reverse and Long.reverse).
@changelog_1304_li
@changelog_1305_li
New system property h2.pageStoreTrim to disable shrinking the database when closing (disabled by default, meaning by default the database is trimmed).
@changelog_1305_h2
@changelog_1306_h2
Version 1.2.120 (2009-10-04)
@changelog_1306_li
@changelog_1307_li
This is a beta version.
@changelog_1307_li
@changelog_1308_li
Large updates could throw an ArrayIndexOutOfBoundsException in RowList.writeRow.
@changelog_1308_li
@changelog_1309_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).
@changelog_1309_li
@changelog_1310_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.
@changelog_1310_li
@changelog_1311_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.
@changelog_1311_li
@changelog_1312_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.
@changelog_1312_li
@changelog_1313_li
PostgreSQL compatibility: function LASTVAL() as an alias for IDENTITY().
@changelog_1313_li
@changelog_1314_li
Linked tables now support default values when inserting, updating or merging.
@changelog_1314_li
@changelog_1315_li
Bugfixes in the page store.
@changelog_1315_li
@changelog_1316_li
Possibility to set a vendor id in Constants.java, so that unofficial builds are distinguishable from official releases.
@changelog_1316_li
@changelog_1317_li
Allow writing to linked tables in readonly databases.
@changelog_1317_h2
@changelog_1318_h2
Version 1.1.119 (2009-09-26)
@changelog_1318_li
@changelog_1319_li
SQL statements in the exception message are no longer included if they contain '--hide--'.
@changelog_1319_li
@changelog_1320_li
Temporary local tables did not always work after reconnect if AUTO_SERVER=TRUE
@changelog_1320_li
@changelog_1321_li
New system property h2.defaultMaxLengthInplaceLob to change the default maximum size of an in-place LOB object.
@changelog_1321_li
@changelog_1322_li
New system property h2.nullConcatIsNull to change the default null concatenation behavior. The default will be enabled in version 1.2.
@changelog_1322_li
@changelog_1323_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.
@changelog_1323_li
@changelog_1324_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.
@changelog_1324_li
@changelog_1325_li
ChangeFileEncryption did not work with Lob subdirectories. Fixed.
@changelog_1325_li
@changelog_1326_li
Issue 121: JaQu: new simple update and merge methods.
@changelog_1326_li
@changelog_1327_li
Issue 120: JaQu didn't close result sets.
@changelog_1327_li
@changelog_1328_li
Issue 119: JaQu creates wrong WHERE conditions on some inputs.
@changelog_1328_li
@changelog_1329_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.
@changelog_1329_li
@changelog_1330_li
SELECT COUNT(*) FROM SYSTEM_RANGE(...) returned the wrong result. Fixed.
@changelog_1330_li
@changelog_1331_li
The Recover tool now also processes the log files, however applying those changes is still a manual process.
@changelog_1331_li
@changelog_1332_li
New sample application that shows how to pass data to a trigger.
@changelog_1332_li
@changelog_1333_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.
@changelog_1333_li
@changelog_1334_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().
@changelog_1334_li
@changelog_1335_li
Updating many rows with the same CLOB or BLOB values could result in FileNotFoundException.
@changelog_1335_li
@changelog_1336_li
Statement.getConnection() threw an exception if the connection was already closed.
@changelog_1336_li
@changelog_1337_li
The native fulltext index kept a reference to a database after the database was closed.
@changelog_1337_li
@changelog_1338_li
Non-unique in-memory hash indexes are now supported. Thanks a lot to Sergi Vladykin for the patch!
@changelog_1338_li
@changelog_1339_li
The optimizer does a better job for joins if indexes are missing.
@changelog_1339_h2
@changelog_1340_h2
Version 1.1.118 (2009-09-04)
@changelog_1340_li
@changelog_1341_li
SHOW COLUMNS only listed indexed columns.
@changelog_1341_li
@changelog_1342_li
When calling SHUTDOWN IMMEDIATELY in the server mode, the .trace.db file was not closed.
@changelog_1342_li
@changelog_1343_li
DatabaseMetaData.getPrimaryKeys: the wrong constraint name was reported if there was another constraint on the same table and columns.
@changelog_1343_li
@changelog_1344_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).
@changelog_1344_li
@changelog_1345_li
Native fulltext search: before searching, FT_INIT() had to be called. This is no longer required.
@changelog_1345_li
@changelog_1346_li
Better support GaeVFS (Google App Engine Virtual File System).
@changelog_1346_li
@changelog_1347_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).
@changelog_1347_li
@changelog_1348_li
Various bugfixes and improvements in the page store mechanism (still experimental).
@changelog_1348_li
@changelog_1349_li
PreparedStatement.setObject now converts a java.lang.Character to a string.
@changelog_1349_li
@changelog_1350_li
H2 Console: PierPaolo Ucchino has completed the Italian translation. Thanks a lot!
@changelog_1350_li
@changelog_1351_li
Various tools now use Java 5 var-args, such as main the methods and SimpleResultSet.addRow.
@changelog_1351_li
@changelog_1352_li
H2 Console: indexes of tables of non-default schemas are now also listed.
@changelog_1352_li
@changelog_1353_li
Issue 111: Multi-version concurrency / duplicate primary key after rollback.
@changelog_1353_li
@changelog_1354_li
Issue 110: Multi-version concurrency / wrong exception is thrown.
@changelog_1354_li
@changelog_1355_li
Parser: sequenceName.NEXTVAL and CURRVAL did not respect the schema search path.
@changelog_1355_li
@changelog_1356_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.
@changelog_1356_li
@changelog_1357_li
The stack trace of very common exceptions is no longer written to the .trace.db file by default.
@changelog_1357_li
@changelog_1358_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.
@changelog_1358_li
@changelog_1359_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.
@changelog_1359_h2
@changelog_1360_h2
Version 1.1.117 (2009-08-09)
@changelog_1360_li
@changelog_1361_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.
@changelog_1361_li
@changelog_1362_li
JaQu: the order of the fields in the database no longer needs to match the order in the database.
@changelog_1362_li
@changelog_1363_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.
@changelog_1363_li
@changelog_1364_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).
@changelog_1364_li
@changelog_1365_li
Views using functions were not re-evaluated when necessary.
@changelog_1365_li
@changelog_1366_li
Improved MySQL compatibility for SHOW COLUMNS.
@changelog_1366_li
@changelog_1367_li
Improved PostgreSQL compatibility for timestamp literals with timezone.
@changelog_1367_li
@changelog_1368_li
Sergi Vladykin translated the error messages to Russian. Thanks a lot!
@changelog_1368_li
@changelog_1369_li
Support for Java 6 DatabaseMetaData.getTables, getColumns, getProcedures, and getProcedureColumns.
@changelog_1369_li
@changelog_1370_li
Issue 101: Rollback of a large transaction (more than 100000 rows) could fail.
@changelog_1370_li
@changelog_1371_li
Various bugfixes and improvements in the page store mechanism (still experimental).
@changelog_1371_li
@changelog_1372_li
The functions LENGTH, OCTET_LENGTH, and BIT_LENGTH now return BIGINT.
@changelog_1372_li
@changelog_1373_li
Data types CLOB and BLOB: the maximum precision was Integer.MAX_VALUE, it is now Long.MAX_VALUE.
@changelog_1373_li
@changelog_1374_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!
@changelog_1374_li
@changelog_1375_li
Parsing SQL script files is now faster.
@changelog_1375_li
@changelog_1376_li
CSV reading is now faster.
@changelog_1376_li
@changelog_1377_li
SimpleResultSet.newInstance(SimpleRowSource rs) did not work.
@cheatSheet_1000_h1
...
...
@@ -8459,7 +8462,7 @@ Recursive Queries (see details).
Eclipse plugin.
@roadmap_1060_li
Asynchronous queries to support publish/subscribe: SELECT ... FOR READ WAIT [maxMillisToWait].
Asynchronous queries to support publish/subscribe: SELECT ... FOR READ WAIT [maxMillisToWait]. See also MS SQL Server "Query Notification".
@roadmap_1061_li
Fulltext search Lucene: analyzer configuration.
...
...
@@ -8924,7 +8927,7 @@ Support Jackcess (MS Access databases)
Built-in methods to write large objects (BLOB and CLOB): FILE_WRITE('test.txt', 'Hello World')
@roadmap_1215_li
MVCC: support transactionally consistent backups using SCRIPT
MVCC: support transactionally consistent backups using SCRIPT.
@roadmap_1216_li
Improve time to open large databases (see mail 'init time for distributed setup')
...
...
@@ -9557,7 +9560,7 @@ Support ALTER SCHEMA name RENAME TO newName (rename schema).
Make the cache scan resistant (currently a small cache is faster than a large cache for large table scans).
@roadmap_1426_li
Issue 178: Optimizer: index usage when both ascending and descending indexes are available
Issue 178: Optimizer: index usage when both ascending and descending indexes are available.
@roadmap_1427_li
Issue 179: Related subqueries in HAVING clause
...
...
@@ -9608,48 +9611,63 @@ ODBC: encrypted databases are not supported because the ;CIPHER= can not be set.
Support CLOB and BLOB update, specially conn.createBlob().setBinaryStream(1);
@roadmap_1443_li
Triggers: support user defined execution order. Oracle: CREATE OR REPLACE TRIGGER TEST_2 BEFORE INSERT ON TEST FOR EACH ROW FOLLOWS TEST_1. SQL specifies that multiple triggers should be fired in time-of-creation order. PostgreSQL uses name order, which was judged to be more convenient. Derby: triggers are fired in the order in which they were created.
Optimizer: index usage when both ascending and descending indexes are available. Issue 178.
@roadmap_1444_li
PostgreSQL compatibility: combine "users" and "roles". See: http://www.postgresql.org/docs/8.1/interactive/user-manag.html
Triggers: support user defined execution order. Oracle: CREATE OR REPLACE TRIGGER TEST_2 BEFORE INSERT ON TEST FOR EACH ROW FOLLOWS TEST_1. SQL specifies that multiple triggers should be fired in time-of-creation order. PostgreSQL uses name order, which was judged to be more convenient. Derby: triggers are fired in the order in which they were created.
@roadmap_1445_li
Support NULL with a type: @meta CALL CAST(NULL AS INT) should return INT. See the ValueExpression.java (currently it returns the type of the value; it could have it's own type/precision/scale optionally, for example when created from CAST, which is implemented in Function.java).
PostgreSQL compatibility: combine "users" and "roles". See: http://www.postgresql.org/docs/8.1/interactive/user-manag.html
@roadmap_1446_li
Improve documentation of system properties: only list the property names, default values, and description.
Support NULL with a type: @meta CALL CAST(NULL AS INT) should return INT. See the ValueExpression.java (currently it returns the type of the value; it could have it's own type/precision/scale optionally, for example when created from CAST, which is implemented in Function.java).
@roadmap_1447_li
Support running totals / cumulative sum using SUM(..) OVER(..).
Improve documentation of system properties: only list the property names, default values, and description.
@roadmap_1448_li
Improve object memory size calculation. Use constants for known VMs, or use reflection to call java.lang.instrument.Instrumentation.getObjectSize(Object objectToSize)
Support running totals / cumulative sum using SUM(..) OVER(..).
@roadmap_1449_li
Triggers: NOT NULL checks should be done after running triggers (Oracle behavior, maybe others).
Improve object memory size calculation. Use constants for known VMs, or use reflection to call java.lang.instrument.Instrumentation.getObjectSize(Object objectToSize)
@roadmap_1450_li
Log long running transactions (similar to long running statements).
Triggers: NOT NULL checks should be done after running triggers (Oracle behavior, maybe others).
@roadmap_1451_li
Support schema specific domains.
Log long running transactions (similar to long running statements).
@roadmap_1452_li
Some combinations of nested join with right outer join are not supported.
Support schema specific domains.
@roadmap_1453_li
Parameter data type is data type of other operand. Issue 205.
@roadmap_1454_li
Some combinations of nested join with right outer join are not supported.
@roadmap_1455_li
DatabaseEventListener.openConnection(id) and closeConnection(id).
@roadmap_1454_h2
@roadmap_1456_li
Compatibility for data type CHAR (Derby, HSQLDB). Issue 212.
@roadmap_1457_li
Compatibility with MySQL TIMESTAMPDIFF. Issue 209.
@roadmap_1458_li
Optimizer: use a histogram of the data, specially for non-normal distributions.
@roadmap_1459_h2
Not Planned
@roadmap_1455_li
@roadmap_1460_li
HSQLDB (did) support this: select id i from test where i<0 (other databases don't). Supporting it may break compatibility.
@roadmap_1456_li
@roadmap_1461_li
String.intern (so that Strings can be compared with ==) will not be used because some VMs have problems when used extensively.
@roadmap_1457_li
@roadmap_1462_li
In prepared statements, identifier names (table names and so on) can not be parameterized. Adding such a feature would complicate the source code without providing reasonable speedup, and would slow down regular prepared statements.
#The wrong exception was thrown when trying to connect to a server if the server was not running.
@changelog_1003_h2
@changelog_1003_li
#UNION queries where the first query contains a nested query were parsed incorrectly. Example: "select 1 from (select 2 from dual) union select 3 from dual" was parsed as "select 1 from ((select 2 from dual) union select 3 from dual)". Fixed.
@changelog_1004_h2
#Version 1.2.138 (2010-06-27)
@changelog_1004_li
@changelog_1005_li
#Referential integrity: it was not allowed to delete a row with NULL in the parent table, if there was a row with NULL in the child table.
@changelog_1005_li
@changelog_1006_li
#Experimental feature to support case sensitive catalog names and database names using the DATABASE() method. To use this feature, set the system property h2.databaseToUpper to false. The plan is to set the property to false by default in version 1.3.x. Issue 204 - thanks to Sylvain Cuaz (ILM Informatique) for the patch.
@changelog_1006_li
@changelog_1007_li
#Experimental feature to support nested joins. To enable, set the system property h2.nestedJoins to true. If enabled, nested joins and right outer joins should work as expected (issues 145, 177, and 203). The plan is to enable this feature by default in version 1.3.x.
#When creating functions within a schema, those functions could not be used in views, nested queries, and constraints. Fixed.
@changelog_1009_li
@changelog_1010_li
#The benchmarks have been run using recent database versions.
@changelog_1010_li
@changelog_1011_li
#Version 1.2.137 could still not be converted to Java 1.4 (because the Retrotranslator doesn't support BigDecimal.precision).
@changelog_1011_li
@changelog_1012_li
#Cluster: non-admin users could not connect when one of the cluster node was stopped. Issue 206.
@changelog_1012_li
@changelog_1013_li
#DROP VIEW now supports the CASCADE and RESTRICT clauses (patch from Kerry Sainsbury)
@changelog_1013_li
@changelog_1014_li
#CREATE VIEW now supports the OR REPLACE clause (patch from Kerry Sainsbury)
@changelog_1014_li
@changelog_1015_li
#Build tool: ability to only run one test using the -Dtest=className setting. eg: build -Dtest=org.h2.test.db.TestViewDropView test (patch from Kerry Sainsbury).
@changelog_1015_h2
@changelog_1016_h2
#Version 1.2.137 (2010-06-06)
@changelog_1016_li
@changelog_1017_li
#Statements with a nested query and a condition that was always NULL threw an IndexOutOfBoundsException. Example: select * from (select null as x) where x=1
@changelog_1017_li
@changelog_1018_li
#Experimental feature to support very large transactions (except when using MVCC). To enable, set the system property h2.largeTransactions to true. If enabled, changes to tables without a primary key can be buffered to disk. The plan is to enable this feature by default in version 1.3.x.
@changelog_1018_li
@changelog_1019_li
#H2 Console: editing result sets is now also working for database other than H2, if they do support updatable result sets. Add "@edit" before the query. Only limited testing has been done on this feature, some data types may not work (please provide feedback if you find issues).
@changelog_1019_li
@changelog_1020_li
#Cluster: an open transaction was committed when a cluster node was stopped (because disabling the cluster executes SET CLUSTER '', which committed the transaction). Transaction are no longer committed when calling SET CLUSTER. Issue 199.
@changelog_1020_li
@changelog_1021_li
#Cluster: non-admin users couldn't connect to the cluster and couldn't disable the cluster. Issue 201.
@changelog_1021_li
@changelog_1022_li
#Cluster: NEXTVAL('sequence') was only called on one cluster node, therefore sequence values could get out of sync.
@changelog_1022_li
@changelog_1023_li
#Version 1.2.136 could not be converted to Java 1.4 (because the Retrotranslator doesn't support BigDecimal.precision). A workaround has been implemented.
@changelog_1023_li
@changelog_1024_li
#The error code of IO exceptions in CSV functions was incorrect.
@changelog_1024_li
@changelog_1025_li
#The TriggerPassData example now uses a prefix (the database name).
@changelog_1025_li
@changelog_1026_li
#The wrong exception was thrown when trying to reference a table that doesn't support references such as a table in the information schema.
@changelog_1026_li
@changelog_1027_li
#Server.shutdownTcpServer can now stop all TCP servers on this JVM.
@changelog_1027_li
@changelog_1028_li
#JdbcConnectionPool: the default connection timeout is now 30 seconds (it used to be 5 minutes).
@changelog_1028_li
@changelog_1029_li
#LOB storage: LOBs added with "h2.lobInDatabase" enabled couldn't be read later with this option disabled.
@changelog_1029_h2
@changelog_1030_h2
#Version 1.2.136 (2010-05-24)
@changelog_1030_li
@changelog_1031_li
#When using ORDER BY and there are both ascending and descending indexes, the database used the first index even when the second one could be used for sorting.
@changelog_1031_li
@changelog_1032_li
#Conditions of the form columnName IS NULL now use an index. To disable this feature, set the system property h2.optimizeIsNull to false.
@changelog_1032_li
@changelog_1033_li
#H2 Console: when the settings were not stored yet (for example when running for the first time), the last recently used settings were not stored. A workaround was to create the file ".h2.server.properties" manually in the current user home directory, with the contents: webAllowOthers=false, webPort=8082, webSSL=false, 0=Generic H2 (Embedded)|org.h2.Driver|jdbc\:h2\:~/test|sa (where a comma is a newline).
@changelog_1033_li
@changelog_1034_li
#The source code is now switched to Java 6 (JDK 1.6) by default. Java 5 (JDK 1.5) is still supported, and the jar file is still compiled for Java 5.
@changelog_1034_li
@changelog_1035_li
#The BOM (the byte-order-mark) character 0xfeff at the beginning of the file is ignored. This is for compatibility with Microsoft Excel.
@changelog_1035_li
@changelog_1036_li
#When opening an existing database, the cache size is set to at most half the amount of memory available for the virtual machine (Runtime.getRuntime().maxMemory()), even if the cache size setting stored in the database is larger. Setting the cache size in the database URL or explicitly using SET CACHE_SIZE overrides this value (even if larger than the physical memory).
@changelog_1036_li
@changelog_1037_li
#INFORMATION_SCHEMA.SETTINGS: the cache size is now returned in KB.
@changelog_1037_li
@changelog_1038_li
#New system property h2.selectForUpdateMvcc, the default is false (the feature is disabled). When enabled, SELECT ... FOR UPDATE only locks the selected rows in the MVCC mode. Aggregate or GROUP BY queries are not allowed in this case.
@changelog_1038_li
@changelog_1039_li
#Profiler: improved message if there was no stack trace.
@changelog_1039_li
@changelog_1040_li
#The H2 Console can now be used within another application, in a frame or iframe. Issue 197.
@changelog_1040_li
@changelog_1041_li
#Recover tool: the statistics section now includes page type counts again.
@changelog_1041_li
@changelog_1042_li
#Queries with multiple IN(...) conditions sometimes return the wrong results when there was a multi-column index for the column.
@changelog_1042_li
@changelog_1043_li
#Queries with IN(..., NULL) did sometimes return the wrong results when there was a index for the column.
@changelog_1043_li
@changelog_1044_li
#DECIMAL: faster precision and memory usage calculations.
@changelog_1044_li
@changelog_1045_li
#A new class org.h2.tools.TriggerAdapter allows to use the ResultSet interface within trigger implementations.
@changelog_1045_li
@changelog_1046_li
#A subselect which used an index could lead to wrong results. Fixed.
@changelog_1046_li
@changelog_1047_li
#Creating a cached temporary non persistent table with a primary key threw a NullPointerException.
@changelog_1047_h2
@changelog_1048_h2
#Version 1.2.135 (2010-05-08)
@changelog_1048_li
@changelog_1049_li
#Temporary files were not deleted when using large transactions, disabling autocommit, and closing the session without committing.
@changelog_1049_li
@changelog_1050_li
#Queries using multiple IN(..) conditions on the same table could cause repeated rows in the result set.
@changelog_1050_li
@changelog_1051_li
#Translation: Lubomir Grajciar translated the H2 Console as well as all error message to Slovensky. Thanks a lot!
@changelog_1051_li
@changelog_1052_li
#There was a possible Java level deadlock when opening an uninitialized database and using a file system that also opened a database.
@changelog_1052_li
@changelog_1053_li
#When killing the process while the database was writing a checkpoint, while it was closing, or while running recovery (while removing temporary tables from a previous run), the database could become corrupt. A new test case has been implemented to ensure such problems can not occur in the future.
@changelog_1053_li
@changelog_1054_li
#File system: new method FileSystem.setReadOnly.
@changelog_1054_li
@changelog_1055_li
#The page size for new databases can now be set in the database URL using ;PAGE_SIZE=512. Currently this feature is only used to simplify testing.
@changelog_1055_li
@changelog_1056_li
#New system property h2.functionsInSchema (default is false). If enabled, the SCRIPT statement always includes the schema name in the CREATE ALIAS statement (even if the schema is PUBLIC). This is not backward compatible with H2 versions 1.2.134 and older.
@changelog_1056_li
@changelog_1057_li
#Functions: it is no longer required to add a space after a comma in the parameter list. Example: CREATE ALIAS PARSE_INT FOR "java.lang.Integer.parseInt(java.lang.String,int)"
@changelog_1057_li
@changelog_1058_li
#Functions now reside within a schema, similar to sequences. If you do create such functions in schemas other than PUBLIC, then the database can not be opened with older versions of H2.
@changelog_1058_li
@changelog_1059_li
#Cluster: after a cluster node failed, the second cluster node can now be re-created and started without having to stop the first cluster node, and without having to stop running applications. To do that, append ;AUTO_RECONNECT=TRUE to the database URL.
@changelog_1059_li
@changelog_1060_li
#Auto-reconnect: if another connection uses the database in exclusive mode then this connection will try to re-connect until the exclusive mode ends. This is important when using the cluster mode.
@changelog_1060_li
@changelog_1061_li
#SET EXCLUSIVE now supports 0 (disable), 1 (enable), and 2 (enable and close all other connections).
@changelog_1061_li
@changelog_1062_li
#Installing the H2 as a service should now work on Windows 7. The batch files now explicitly set the directory using pushd "%~dp0".
@changelog_1062_li
@changelog_1063_li
#Temporary tables can now be 'cached', that means indexes of temporary tables can be persisted. This enables very large temporary tables (both local and global).
@changelog_1063_li
@changelog_1064_li
#The CreateCluster tool now sets the source database in exclusive mode before copying data to the new database.
@changelog_1064_li
@changelog_1065_li
#The H2 Console now stream results one statement / result set at a time (using chunked transfer encoding). To disable, set the system property h2.consoleStream to false. This feature is not supported when using a servlet container.
@changelog_1065_li
@changelog_1066_li
#The H2 Console did not call the CreateCluster tool with the correctly escaped parameters.
@changelog_1066_li
@changelog_1067_li
#Improved PostgreSQL compatibility for ALTER TABLE ALTER COLUMN.
@changelog_1067_li
@changelog_1068_li
#Commas at the end of INSERT ... VALUES (), (), are now supported.
@changelog_1068_li
@changelog_1069_li
#The H2 Console "Start Browser" button now works even when the IP address changes while the tool runs (for example, because a wireless connection breaks, or when enabling / disabling the network connection).
@changelog_1069_li
@changelog_1070_li
#When casting from float or double to BigDecimal, the result was sometimes unexpected, because "new BigDecimal(double val)" was used. Now "BigDecimal.valueOf(double val)" and "new BigDecimal(Float.toString(f))" are used. But it is still not recommended to use float or double for currency values (see data type documentation).
@changelog_1070_li
@changelog_1071_li
#Global temporary tables are now deleted when closing the database. Before, they were deleted when opening the database the next time.
@changelog_1071_li
@changelog_1072_li
#UNIQUE was not listed as a keyword.
@changelog_1072_li
@changelog_1073_li
#Improved error message when an non-SQL-exception occurred in a user defined function. The method name and parameters are included in the error message.
@changelog_1073_li
@changelog_1074_li
#For some queries, the exception did not include the SQL statement. Example: select x from system_range(1, 2) group by 'a'.
@changelog_1074_li
@changelog_1075_li
#The Shell tool will execute SQL statements passed as using the command line parameter -sql.
@changelog_1075_li
@changelog_1076_li
#If InetAddress.getLocalHost() fails, the database should now throw an exception.
@changelog_1076_li
@changelog_1077_li
#New columns INFORMATION_SCHEMA.INDEXES.INDEX_CLASS and INFORMATION_SCHEMA.TABLES.TABLE_CLASS.
@changelog_1077_li
@changelog_1078_li
#INFORMATION_SCHEMA.INDEXES.SQL now contains the CREATE INDEX statement instead of just the fully qualified index name.
@changelog_1078_h2
@changelog_1079_h2
#Version 1.2.134 (2010-04-23)
@changelog_1079_li
@changelog_1080_li
#New system property h2.analyzeAuto (default 0 meaning disabled) to automatically run ANALYZE after that many changes to a table. For details, see the Javadoc of this system property. The plan is to set this property to 2000 in version 1.3.x.
@changelog_1080_li
@changelog_1081_li
#JdbcXAConnection.start() does not support TMJOIN. Issue 189.
@changelog_1081_li
@changelog_1082_li
#MySQL compatibility: TIMESTAMPDIFF is now an alias for DATEDIFF.
@changelog_1082_li
@changelog_1083_li
#MERGE did not respect foreign key and check constraints.
@changelog_1083_li
@changelog_1084_li
#ALTER TABLE ALTER COLUMN: changing the data type of a column no longer makes it nullable.
@changelog_1084_li
@changelog_1085_li
#When using AUTO_SERVER=TRUE, the server is now started as a daemon thread. This was a problem when using Tomcat and a connection pool.
@changelog_1085_li
@changelog_1086_li
#Servers can now be started as a daemon thread using the command line options -tcpDaemon, -pgDaemon, and -webDaemon.
@changelog_1086_li
@changelog_1087_li
#H2 Console: the built-in commands are now documented.
@changelog_1087_li
@changelog_1088_li
#REPLACE: if any parameter is null, the result is null.
@changelog_1088_li
@changelog_1089_li
#Queries with DISTINCT and ORDER BY will now use the index on ORDER BY if possible. This is specially important for queries used inside IN(SELECT ...).
@changelog_1089_li
@changelog_1090_li
#The new statement EXPLAIN ANALYZE executes the statement, and displays the query plan with the actual row scan count for each table.
@changelog_1090_li
@changelog_1091_li
#H2 Console: the auto-complete feature didn't quote column names that need quoting. Issue 186.
@changelog_1091_li
@changelog_1092_li
#The experimental LOB storage mechanism now supports all features of the old one. To use it, set the system property "h2.lobInDatabase" to "true". If you have used this feature in version 1.2.133, you need to export and re-import the database using SCRIPT / RUNSCRIPT.
@changelog_1092_li
@changelog_1093_li
#The functions isBeforeFirst() and isAfterLast() were not compliant to the JDBC spec. If the ResultSet contains no rows, they must return false. Fixed.
@changelog_1093_li
@changelog_1094_li
#Filesystem parameters like "split:" didn't work in server mode with baseDir set.
@changelog_1094_li
@changelog_1095_li
#If baseDir is set, and a database name is given which points to a directory outside the baseDir (eg. "../dbname"), an exception is thrown.
@changelog_1095_h2
@changelog_1096_h2
#Version 1.2.133 (2010-04-10)
@changelog_1096_li
@changelog_1097_li
#A new experimental LOB storage mechanism is available. When enabled, CLOB and BLOB data is stored in hidden tables in the database. To use it, set the system property "h2.lobInDatabase" to "true". Compression is not yet implemented. Duplicate objects are only stored once. Usually writing is slower, but reading is faster (mainly because of caching).
@changelog_1097_li
@changelog_1098_li
#The Shell tool threw a NumberFormatException on a empty statement.
@changelog_1098_li
@changelog_1099_li
#The h2small-*.jar did not support "drop all objects delete files". Now it is supported (the DeleteDbFiles tool is now included).
@changelog_1099_li
@changelog_1100_li
#Operations that don't fit in memory are now faster. Temporary file handling was changed.
@changelog_1100_li
@changelog_1101_li
#The default maximum log stream size is now 2 MB. This is a good value according to some performance tests.
@changelog_1101_li
@changelog_1102_li
#New system property "h2.syncMethod" to configure what method to call when closing the database, on checkpoint, and on CHECKPOINT SYNC. The default is "sync" which calls RandomAccessFile.getFD().sync().
@changelog_1102_li
@changelog_1103_li
#ROWNUM could not be used for pagination. The follow query returned no rows: select x from (select *, rownum as r from system_range(1, 3)) where r=2;
@changelog_1103_li
@changelog_1104_li
#Workaround for a java.sql.Date issue: years above 9999 are not formatted correctly. When calling ResultSet.getString() on a date value, an alternative formatting algorithm is used.
@changelog_1104_li
@changelog_1105_li
#Prepared statements with nested subqueries did not always return the correct result. Example: select ?, ?, (select count(*) from test t, (select id from test where 0=?) t2 where t2.id=t.id) from test
@changelog_1105_li
@changelog_1106_li
#When using MULTI_THREADED=TRUE, the exception following exception could be thrown: "object already exists: TABLES"
@changelog_1106_li
@changelog_1107_li
#Comparison of integer columns against float numbers was not always correct. Issue 182.
@changelog_1107_li
@changelog_1108_li
#H2 Console: Editing the result of a multi-line queries failed. Issue 183.
@changelog_1108_li
@changelog_1109_li
#H2 Console: if the settings file (.h2.properties) can't be accessed, the exception is now ignored.
@changelog_1109_h2
@changelog_1110_h2
#Version 1.2.132 (2010-03-21)
@changelog_1110_li
@changelog_1111_li
#The implementation of a Java to C (source code level) converter has been started. The plan is: it should be possible to convert H2 (or a part of it) to C so that the database can be run without a JVM. This will be a long term project (it may take a year or so).
@changelog_1111_li
@changelog_1112_li
#User defined table implementation can now be used using CREATE TABLE ... ENGINE. Thanks to Sergi Vladykin for implementing this feature!
@changelog_1112_li
@changelog_1113_li
#Improved MS SQL Server compatibility: support string concatenation using "+". Thanks to Stepan for the patch!
@changelog_1113_li
@changelog_1114_li
#When using the multi-threaded mode, running ANALYZE concurrently in multiple connections could throw an exception.
@changelog_1114_li
@changelog_1115_li
#The MERGE statement is now about 30% faster when using a PreparedStatement.
@changelog_1115_li
@changelog_1116_li
#Multi-column indexes where the second or later column was descending did not always produce correct results (rows were missing in the result set, or the result set was empty).
@changelog_1116_li
@changelog_1117_li
#When using large transactions or a small log size, the database could get very slow (profiling shows the hotspot is in FileObjectDisk.sync()).
@changelog_1117_li
@changelog_1118_li
#The Shell tool now prints the stack trace when the list mode is enabled.
@changelog_1118_li
@changelog_1119_li
#CREATE ALIAS ... AS: Compilation was incorrect if the source code contained characters that are not supported by the default file encoding.
@changelog_1119_li
@changelog_1120_li
#Issue 176: the JdbcDataSource now also supports a 'description' property.
@changelog_1120_li
@changelog_1121_li
#The Shell tool threw a ArrayIndexOutOfBoundsException after 20 statements.
@changelog_1121_li
@changelog_1122_li
#When using the small version of H2 ('jarClient'), the first call to Connection.createBlob (or similar) could throw a ClassNotFoundException because the file org.h2.store.fs.FileSystemZip is not included. This missing class is now ignored.
@changelog_1122_li
@changelog_1123_li
#Literals of type BIGINT now have the correct data type.
@changelog_1123_h2
@changelog_1124_h2
#Version 1.2.131 (2010-03-05)
@changelog_1124_li
@changelog_1125_li
#Older versions of H2 (version 1.2.127 and older) could not connect to a new version (version 1.2.129 and newer). The connection blocked when trying to connect. Now the connection no longer blocks, instead a SQL exception is thrown.
@changelog_1125_li
@changelog_1126_li
#In versions 1.2.129 and 1.2.130, a database could not be opened sometimes after dropping tables or indexes, and then creating new indexes for existing tables. The exception contained the text "parent not found" (version 1.2.129) or "Table not found" (version 1.2.130).
@changelog_1126_li
@changelog_1127_li
#After the database was closed, a null pointer exception could occur in Database.flush.
@changelog_1127_li
@changelog_1128_li
#An ArrayIndexOutOfBoundsException could occur in the page store (eg. on "delete from table"). Fixed.
@changelog_1128_h2
@changelog_1129_h2
#Version 1.2.130 (2010-02-26)
@changelog_1129_li
@changelog_1130_li
#EXPLAIN: The query plan now contains ".tableScan" if a table scan is used.
@changelog_1130_li
@changelog_1131_li
#IN(..): when combining and IN(..) condition with a condition that didn't use an index, the result could contain duplicate rows.
@changelog_1131_li
@changelog_1132_li
#IN(..): the index was not used if there were multiple IN(..) conditions.
@changelog_1132_li
@changelog_1133_li
#For foreign key constraints, the metadata column INFORMATION_SCHEMA.INDEXES.CONSTRAINT_NAME was not set for non-unique indexes.
@changelog_1133_li
@changelog_1134_li
#PostgreSQL compatibility: when using the following exception was thrown: Column "T.TYPTYPMOD" not found. Fixed. This is only when using psqlodbc_08_04*.
@changelog_1134_li
@changelog_1135_li
#A tool to migrate an old database from the non-page store format to the newest version has been added in src/tools/org/h2/dev/util/Migrate.java. This file is not included in the jar file currently.
@changelog_1135_li
@changelog_1136_li
#When using temporary tables, the database didn't shrink sometimes when closing. Also, sometimes a database could not recover normally.
@changelog_1136_li
@changelog_1137_li
#Large transactions could run out of heap space. The maximum size of a transaction is now much larger.
@changelog_1137_li
@changelog_1138_li
#The default setting for the system property h2.webMaxValueLength is now 100000 (it was 10000 before).
@changelog_1138_li
@changelog_1139_li
#Creating a database was delayed about 2 seconds if the directory didn't exist.
@changelog_1139_li
@changelog_1140_li
#Implemented INIT feature. If the database URL contains ";INIT=...;" then the DDL or DML commands following are executed on startup. Example URL: jdbc:h2:mem:test;INIT=RUNSCRIPT FROM '~/create.sql' (patch from Kerry Sainsbury).
@changelog_1140_h2
@changelog_1141_h2
#Version 1.2.129 (2010-02-19)
@changelog_1141_li
@changelog_1142_li
#The methods of the CloseListener are added to the Trigger interface. The interface CloseListener is removed. This is potentially a breaking change for existing triggers.
@changelog_1142_li
@changelog_1143_li
#CREATE ALIAS: error message when compiling Java code have been improved.
@changelog_1143_li
@changelog_1144_li
#MVCC: creating a table with an incorrect constraint could cause strange errors.
@changelog_1144_li
@changelog_1145_li
#Hash indexes now are only used for single column indexes.
@changelog_1145_li
@changelog_1146_li
#The cache types WEAK_* and TQ are no longer supported. A weak reference cache never frees up memory so it's the same as having a very large cache size. The TQ cache was not included in the jar file since a longer time, and was not tested.
@changelog_1146_li
@changelog_1147_li
#The file system abstraction no longer throws SQL exceptions.
@changelog_1147_li
@changelog_1148_li
#DatabaseEventListener.diskSpaceIsLow has changed.
@changelog_1148_li
@changelog_1149_li
#The CompressTool no longer throw as SQL exceptions. Instead, it throws runtime exceptions.
@changelog_1149_li
@changelog_1150_li
#SimpleResultSet.addColumn and addRow now can throw a IllegalStateException instead of a SQLException.
@changelog_1150_li
@changelog_1151_li
#When doing an index lookup, decimal values with the same value but different scale (for example 0.00 and 0.0) where not considered equal in version 1.2.128. Now they are (unlike BigDecimal.equals()).
@changelog_1151_li
@changelog_1152_li
#The BNF parser now uses the visitor pattern.
@changelog_1152_li
@changelog_1153_li
#Converting a UUID to bytes was incorrect. Because of that, updatable result sets on tables with UUID primary key did not work.
@changelog_1153_li
@changelog_1154_li
#The database URL property DATABASE_EVENT_LISTENER_OBJECT is no longer supported (there are problems passing objects when the PostgreSQL driver is installed as well).
@changelog_1154_li
@changelog_1155_li
#H2 Console: asynchronous login (using a DatabaseEventListener) is no longer supported.
@changelog_1155_li
@changelog_1156_li
#A workaround for a Windows socket problem has been implemented. Thanks a lot to Sergi Vladykin.
@changelog_1156_li
@changelog_1157_li
#The Recover tool did not convert correctly convert CLOB data with non-ASCII characters.
@changelog_1157_li
@changelog_1158_li
#Tools: the method run(String... args) has been renamed to runTool(String... args).
@changelog_1158_li
@changelog_1159_li
#Server.startWebServer(Connection) was not working as expected.
@changelog_1159_li
@changelog_1160_li
#The database URL option ACCESS_MODE_LOG is no longer supported.
@changelog_1160_li
@changelog_1161_li
#The database URL option RECOVER has currently no effect.
@changelog_1161_li
@changelog_1162_li
#Converting an old (non-page store) database is no longer supported using this version.
@changelog_1162_li
@changelog_1163_li
#The following system properties are no longer supported: h2.overflowExceptions, h2.optimizeDropDependencies, h2.optimizeGroupSorted, h2.optimizeMinMax, h2.optimizeNot, h2.optimizeIn, h2.optimizeInJoin, h2.reuseSpace*. Most of then were there for a long time, but always with the same value. There was no unit test with the other value. So changing them was potentially dangerous (not a lot, but still).
@changelog_1163_li
@changelog_1164_li
#The setting LOG has currently no effect (it only had an effect when the page store was disabled).
@changelog_1164_li
@changelog_1165_li
#Disabling the page store is no longer supported. The old storage mechanism has been removed, shrinking the jar file size by almost 10%.
@changelog_1165_li
@changelog_1166_li
#The translated resources are now stored in UTF-8 format.
@changelog_1166_li
@changelog_1167_li
#The Windows service wrapper now detects if multiple versions of H2 are installed.
@changelog_1167_h2
@changelog_1168_h2
#Version 1.2.128 (2010-01-30)
@changelog_1168_li
@changelog_1169_li
#There are known errors on rollback when the page store is disabled and at the same time MVCC is used. See http://code.google.com/p/h2database/issues/detail?id=158
@changelog_1169_li
@changelog_1170_li
#The DeleteDbFiles tool deleted all files in the .lob.db directory, even files that didn't belong to the database.
@changelog_1170_li
@changelog_1171_li
#Automatic conversion of old databases to the page store format failed if the database contained LOB files.
@changelog_1171_li
@changelog_1172_li
#Nested subqueries didn't work for INSERT INTO and IN(..). Example: insert into test ((select 1));
@changelog_1172_li
@changelog_1173_li
#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_1173_li
@changelog_1174_li
#Less classes are loaded when using the database in embedded mode.
@changelog_1174_li
@changelog_1175_li
#The information schema tables are only initialized when needed. This reduces memory usage and speeds up creating in-memory databases. Each in-memory database needs about 8 KB of heap memory.
@changelog_1175_li
@changelog_1176_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;
@changelog_1176_li
@changelog_1177_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).
@changelog_1177_li
@changelog_1178_li
#Improved PostgreSQL compatibility (support SHOW DEFAULT_TRANSACTION_ISOLATION).
@changelog_1178_li
@changelog_1179_li
#Documentation: the javadocs for Csv.write and read used the wrong default charset.
@changelog_1179_li
@changelog_1180_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.
@changelog_1180_li
@changelog_1181_li
#If a FOR UPDATE query was executed twice (using a PreparedStatement), the table was not locked.
@changelog_1181_li
@changelog_1182_li
#Triggers: INSTEAD OF triggers are now supported. Such triggers can be defined on views.
@changelog_1182_li
@changelog_1183_li
#New system property h2.identifiersToUpper. If set to false, identifiers in SQL statements are case sensitive even if they are not quoted.
@changelog_1183_li
@changelog_1184_li
#Slightly improved performance if the table is already locked.
@changelog_1184_li
@changelog_1185_li
#CompressLZF: faster decompression.
@changelog_1185_li
@changelog_1186_li
#PgServer: the wrong size was sent for VARCHAR data. Thanks again to Sergi Vladykin for the patch.
@changelog_1186_li
@changelog_1187_li
#Serialized access mode (server-less multi-connection mode): fixed getGeneratedKeys() for sequences.
@changelog_1187_h2
@changelog_1188_h2
#Version 1.2.127 (2010-01-15)
@changelog_1188_li
@changelog_1189_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).
@changelog_1189_li
@changelog_1190_li
#Page store: new databases can not be opened with older versions.
@changelog_1190_li
@changelog_1191_li
#Page store: adding data to new database is now faster.
@changelog_1191_li
@changelog_1192_li
#File system: getting the file name from a path is now faster. This should speed up BLOB and CLOB access.
@changelog_1192_li
@changelog_1193_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!
@changelog_1193_li
@changelog_1194_li
#SHOW COLUMNS did not work correctly if there where multiple indexes on the same columns.
@changelog_1194_li
@changelog_1195_li
#Page store: the wrong write count was written to the database header. This could cause the server-less multi-connection mode to fail.
@changelog_1195_li
@changelog_1196_li
#Result sets larger than 2 GB threw an exception "Negative seek offset". Fixed.
@changelog_1196_li
@changelog_1197_li
#If the system property h2.check was set to false, an ArrayIndexOutOfBoundsException could occur.
@changelog_1197_li
@changelog_1198_li
#Alter table is now supported even if a table has views defined. (Patch from Kerry Sainsbury).
@changelog_1198_li
@changelog_1199_li
#Fulltext search: exceptions within the fulltext search package had the wrong SQL state.
@changelog_1199_li
@changelog_1200_li
#The Lucene fulltext search ignored transaction rollback. Fixed using a trigger on rollback.
@changelog_1200_li
@changelog_1201_li
#Trigger can now be called on rollback.
@changelog_1201_li
@changelog_1202_li
#The shell script h2.sh ignored command line line arguments.
@changelog_1202_li
@changelog_1203_li
#When running H2 in the Google AppEngine for Java, a AccessControlException could be thrown when trying to open a read-only database. Fixed.
@changelog_1203_li
@changelog_1204_li
#The user home directory prefix (~) is now only expanded when followed by a slash or backslash, or standing alone.
@changelog_1204_li
@changelog_1205_li
#Native fulltext search: before inserting or deleting data, FT_INIT() had to be called. This is no longer required.
@changelog_1205_li
@changelog_1206_li
#The .trace.db file is now only created if required.
@changelog_1206_li
@changelog_1207_li
#Shell tool: improved PostgreSQL compatibility.
@changelog_1207_li
@changelog_1208_li
#Trying to open a database in read-only mode when a .lock.db file exists will now fail with a nice error message.
@changelog_1208_li
@changelog_1209_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).
@changelog_1209_li
@changelog_1210_li
#Faster data conversion from BIGINT or INT to DECIMAL.
@changelog_1210_li
@changelog_1211_li
#Server-less multi-connection mode: try to delete log files if switching between read/write operations.
@changelog_1211_li
@changelog_1212_li
#CompressLZF: Faster decompress and improved javadocs
@changelog_1212_h2
@changelog_1213_h2
#Version 1.2.126 (2009-12-18)
@changelog_1213_li
@changelog_1214_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.
@changelog_1214_li
@changelog_1215_li
#CSVREAD: when reading the column names from the CSV file, column names that contain no special characters are considered case insensitive now.
@changelog_1215_li
@changelog_1216_li
#Optimization index conditions of the form 'column=NULL' (which is always false; unlike 'column IS NULL').
@changelog_1216_li
@changelog_1217_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.
@changelog_1217_li
@changelog_1218_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').
@changelog_1218_li
@changelog_1219_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').
@changelog_1219_li
@changelog_1220_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.
@changelog_1220_li
@changelog_1221_li
#JaQu: the decompiler has been improved, and a few test cases already work. It is still incomplete however.
@changelog_1221_li
@changelog_1222_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).
@changelog_1222_li
@changelog_1223_li
#The reserve heap memory is no longer used.
@changelog_1223_li
@changelog_1224_li
#Database.checkpoint() could throw a NullPointerException.
@changelog_1224_h2
@changelog_1225_h2
#Version 1.2.125 (2009-12-06)
@changelog_1225_li
@changelog_1226_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.
@changelog_1226_li
@changelog_1227_li
#The shell tool now has a very simple statement history.
@changelog_1227_li
@changelog_1228_li
#The zip file system implementation now supports the '~' home directory prefix. Example database URL: jdbc:h2:zip:~/test.zip!/test
@changelog_1228_li
@changelog_1229_li
#Right outer joins on tables that were already 'inner joined' was processed incorrectly.
@changelog_1229_li
@changelog_1230_li
#Temporary files from LOB objects were not deleted early enough when using the server mode.
@changelog_1230_li
@changelog_1231_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.
@changelog_1231_li
@changelog_1232_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.
@changelog_1232_li
@changelog_1233_li
#Trigger that are called before a select statement are now supported. This allows to create tables that work like materialized views.
@changelog_1233_li
@changelog_1234_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.
@changelog_1234_li
@changelog_1235_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').
@changelog_1235_li
@changelog_1236_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).
@changelog_1236_li
@changelog_1237_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!
@changelog_1237_li
@changelog_1238_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.
@changelog_1238_li
@changelog_1239_li
#The test cases don't access the file system directly, this simplifies GAE for Java testing. Thanks to Vince Bonfanti.
@changelog_1239_li
@changelog_1240_li
#More bugs in the server-less multi-connection mode have been fixed.
@changelog_1240_li
@changelog_1241_li
#When running against an old database, the SCRIPT statement could generate a SQL script that contained duplicate indexes (PRIMARY_KEY_E).
@changelog_1241_li
@changelog_1242_li
#JdbcConnectionPool.getConnection() could throw a NullPointerException.
@changelog_1242_li
@changelog_1243_li
#User defined functions: the source code is now available using SELECT SOURCE FROM INFORMATION_SCHEMA.FUNCTION_ALIASES.
@changelog_1243_li
@changelog_1244_li
#User defined functions with source code didn't work after re-opening the database.
@changelog_1244_li
@changelog_1245_li
#The newsfeeds are now Atom 1.0 standard compliant.
@changelog_1245_li
@changelog_1246_li
#The database is now closed after an out of memory exception, because the database could get corrupt otherwise.
@changelog_1246_li
@changelog_1247_li
#Better error message if both AUTO_SERVER and SERIALIZED parameters are set to TRUE.
@changelog_1247_li
@changelog_1248_li
#Drop table did not delete lob files in old file store (not PAGE_STORE).
@changelog_1248_h2
@changelog_1249_h2
#Version 1.2.124 (2009-11-20)
@changelog_1249_li
@changelog_1250_li
#Clustering: there is now a way to detect which cluster instances are running.
@changelog_1250_li
@changelog_1251_li
#ConvertTraceFile: the SQL statement statistics are better formatted (newline are removed).
@changelog_1251_li
@changelog_1252_li
#The file lock thread is now stopped when the database is closed.
@changelog_1252_li
@changelog_1253_li
#Issue 140: the Script tool now supports writing to a stream.
@changelog_1253_li
@changelog_1254_li
#Issue 138: the trace output of Statement.execute(String, int) and executeUpdate was incorrect.
@changelog_1254_li
@changelog_1255_li
#Page store: new databases can not be opened with older versions.
@changelog_1255_li
@changelog_1256_li
#Page store: multi-column indexes didn't work if the cache was very small.
@changelog_1256_li
@changelog_1257_li
#Page store: opening a database could theoretically result in an endless loop.
@changelog_1257_li
@changelog_1258_li
#Page store: adding large indexed columns could get very slow.
@changelog_1258_li
@changelog_1259_li
#Page store: after a duplicate key exception, an ArrayIndexOutOfBoundsException could be thrown (only for very large rows).
@changelog_1259_li
@changelog_1260_li
#Page store: the recover tool sometimes generated a script file that contained duplicate data.
@changelog_1260_li
@changelog_1261_li
#Page store: sometimes opening a read-only database failed.
@changelog_1261_li
@changelog_1262_li
#Page store: opening a database sometimes failed if large rows where updated, or if a table was truncated before.
@changelog_1262_li
@changelog_1263_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.
@changelog_1263_li
@changelog_1264_li
#Page store: getting the min value from a descending index with NULL entries could return the wrong result.
@changelog_1264_li
@changelog_1265_li
#Page store: improved auto-recovery after power failure.
@changelog_1265_li
@changelog_1266_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.
@changelog_1266_li
@changelog_1267_li
#User defined functions can be created with source code. Example: CREATE ALIAS HI AS 'String hi() { return "Hello"; }'
@changelog_1267_li
@changelog_1268_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.
@changelog_1268_li
@changelog_1269_li
#Inserting LOBs got slower each time the process was restarted. It could loop endlessly after about 1000 process restarts.
@changelog_1269_li
@changelog_1270_li
#Issue 117: Multi-version concurrency: concurrent MERGE statements now work.
@changelog_1270_li
@changelog_1271_li
#Improved read-only database detection.
@changelog_1271_h2
@changelog_1272_h2
#Version 1.2.123 (2009-11-08)
@changelog_1272_li
@changelog_1273_li
#Page store: new databases can not be opened with older versions.
@changelog_1273_li
@changelog_1274_li
#Page store: updating large rows (rows with more than 2000 bytes of data) could corrupt the database.
@changelog_1274_li
@changelog_1275_li
#Page store: inserting very large rows failed with ArrayIndexOutOfBoundsException.
@changelog_1275_li
@changelog_1276_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.
@changelog_1276_li
@changelog_1277_li
#The fulltext search methods and fields are now protected instead of private, to make the classes more easily extensible.
@changelog_1277_li
@changelog_1278_li
#The Lucene fulltext search now also returns the score.
@changelog_1278_li
@changelog_1279_li
# New function SCOPE_IDENTITY() to avoid problems when inserting rows in a trigger.
@changelog_1279_li
@changelog_1280_li
#Statement.getGeneratedKeys() returned the wrong value if a trigger changed the identity value after inserting the row.
@changelog_1280_li
@changelog_1281_li
#Improved error messages: identifiers and values are now quoted.
@changelog_1281_li
@changelog_1282_li
#Improved error message when casting a value failed: the column name and type is included in the message.
@changelog_1282_li
@changelog_1283_li
#Improved support for GAE for Java thanks to Vince Bonfanti.
@changelog_1283_h2
@changelog_1284_h2
#Version 1.2.122 (2009-10-28)
@changelog_1284_li
@changelog_1285_li
#The native fulltext search now supports streaming CLOB data.
@changelog_1285_li
@changelog_1286_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).
@changelog_1286_li
@changelog_1287_li
#Dropping the current user is now allowed if another admin user exists.
@changelog_1287_li
@changelog_1288_li
#Values of type BINARY or BLOB could not be converted to the data type OTHER.
@changelog_1288_li
@changelog_1289_li
#SHUTDOWN COMPACT now fully compacts the database.
@changelog_1289_li
@changelog_1290_li
#New system properties h2.maxCompactCount and h2.maxCompactTime to allow changing the default behavior (at most 2 seconds compacting when closing the database).
@changelog_1290_li
@changelog_1291_li
#New sorted insert optimization (see Performance / Database Performance Tuning).
@changelog_1291_li
@changelog_1292_li
#Issue 116: The files h2*-sources.jar and h2*-javadoc.jar are now in the Maven repository.
@changelog_1292_li
@changelog_1293_li
#Page store: opening a large database was slow if it was not closed before.
@changelog_1293_li
@changelog_1294_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')
@changelog_1294_li
@changelog_1295_li
#The SQL syntax is documented using (railroad) diagrams. The diagrams are HTML.
@changelog_1295_li
@changelog_1296_li
#The documentation is no longer available in Japanese because the translation was too much out of sync. Please use the Google translation instead.
@changelog_1296_li
@changelog_1297_li
#Certain queries were not sorted if subselect queries were involved
@changelog_1297_li
@changelog_1298_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.
@changelog_1298_h2
@changelog_1299_h2
#Version 1.2.121 (2009-10-11)
@changelog_1299_li
@changelog_1300_li
#Better support GaeVFS (Google App Engine Virtual File System) thanks to Thanks to Vince Bonfanti.
@changelog_1300_li
@changelog_1301_li
#CSVREAD didn't close the file. Thanks to Vince Bonfanti for the patch!
@changelog_1301_li
@changelog_1302_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.
@changelog_1302_li
@changelog_1303_li
#Page store bugs were fixed. Large values in indexed columns could corrupt the index.
@changelog_1303_li
@changelog_1304_li
#The page store did not work when using Retrotranslator (because the Retrotranslator doesn't support Integer.reverse and Long.reverse).
@changelog_1304_li
@changelog_1305_li
#New system property h2.pageStoreTrim to disable shrinking the database when closing (disabled by default, meaning by default the database is trimmed).
@changelog_1305_h2
@changelog_1306_h2
#Version 1.2.120 (2009-10-04)
@changelog_1306_li
@changelog_1307_li
#This is a beta version.
@changelog_1307_li
@changelog_1308_li
#Large updates could throw an ArrayIndexOutOfBoundsException in RowList.writeRow.
@changelog_1308_li
@changelog_1309_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).
@changelog_1309_li
@changelog_1310_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.
@changelog_1310_li
@changelog_1311_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.
@changelog_1311_li
@changelog_1312_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.
@changelog_1312_li
@changelog_1313_li
#PostgreSQL compatibility: function LASTVAL() as an alias for IDENTITY().
@changelog_1313_li
@changelog_1314_li
#Linked tables now support default values when inserting, updating or merging.
@changelog_1314_li
@changelog_1315_li
#Bugfixes in the page store.
@changelog_1315_li
@changelog_1316_li
#Possibility to set a vendor id in Constants.java, so that unofficial builds are distinguishable from official releases.
@changelog_1316_li
@changelog_1317_li
#Allow writing to linked tables in readonly databases.
@changelog_1317_h2
@changelog_1318_h2
#Version 1.1.119 (2009-09-26)
@changelog_1318_li
@changelog_1319_li
#SQL statements in the exception message are no longer included if they contain '--hide--'.
@changelog_1319_li
@changelog_1320_li
#Temporary local tables did not always work after reconnect if AUTO_SERVER=TRUE
@changelog_1320_li
@changelog_1321_li
#New system property h2.defaultMaxLengthInplaceLob to change the default maximum size of an in-place LOB object.
@changelog_1321_li
@changelog_1322_li
#New system property h2.nullConcatIsNull to change the default null concatenation behavior. The default will be enabled in version 1.2.
@changelog_1322_li
@changelog_1323_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.
@changelog_1323_li
@changelog_1324_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.
@changelog_1324_li
@changelog_1325_li
#ChangeFileEncryption did not work with Lob subdirectories. Fixed.
@changelog_1325_li
@changelog_1326_li
#Issue 121: JaQu: new simple update and merge methods.
@changelog_1326_li
@changelog_1327_li
#Issue 120: JaQu didn't close result sets.
@changelog_1327_li
@changelog_1328_li
#Issue 119: JaQu creates wrong WHERE conditions on some inputs.
@changelog_1328_li
@changelog_1329_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.
@changelog_1329_li
@changelog_1330_li
#SELECT COUNT(*) FROM SYSTEM_RANGE(...) returned the wrong result. Fixed.
@changelog_1330_li
@changelog_1331_li
#The Recover tool now also processes the log files, however applying those changes is still a manual process.
@changelog_1331_li
@changelog_1332_li
#New sample application that shows how to pass data to a trigger.
@changelog_1332_li
@changelog_1333_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.
@changelog_1333_li
@changelog_1334_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().
@changelog_1334_li
@changelog_1335_li
#Updating many rows with the same CLOB or BLOB values could result in FileNotFoundException.
@changelog_1335_li
@changelog_1336_li
#Statement.getConnection() threw an exception if the connection was already closed.
@changelog_1336_li
@changelog_1337_li
#The native fulltext index kept a reference to a database after the database was closed.
@changelog_1337_li
@changelog_1338_li
#Non-unique in-memory hash indexes are now supported. Thanks a lot to Sergi Vladykin for the patch!
@changelog_1338_li
@changelog_1339_li
#The optimizer does a better job for joins if indexes are missing.
@changelog_1339_h2
@changelog_1340_h2
#Version 1.1.118 (2009-09-04)
@changelog_1340_li
@changelog_1341_li
#SHOW COLUMNS only listed indexed columns.
@changelog_1341_li
@changelog_1342_li
#When calling SHUTDOWN IMMEDIATELY in the server mode, the .trace.db file was not closed.
@changelog_1342_li
@changelog_1343_li
#DatabaseMetaData.getPrimaryKeys: the wrong constraint name was reported if there was another constraint on the same table and columns.
@changelog_1343_li
@changelog_1344_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).
@changelog_1344_li
@changelog_1345_li
#Native fulltext search: before searching, FT_INIT() had to be called. This is no longer required.
@changelog_1345_li
@changelog_1346_li
#Better support GaeVFS (Google App Engine Virtual File System).
@changelog_1346_li
@changelog_1347_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).
@changelog_1347_li
@changelog_1348_li
#Various bugfixes and improvements in the page store mechanism (still experimental).
@changelog_1348_li
@changelog_1349_li
#PreparedStatement.setObject now converts a java.lang.Character to a string.
@changelog_1349_li
@changelog_1350_li
#H2 Console: PierPaolo Ucchino has completed the Italian translation. Thanks a lot!
@changelog_1350_li
@changelog_1351_li
#Various tools now use Java 5 var-args, such as main the methods and SimpleResultSet.addRow.
@changelog_1351_li
@changelog_1352_li
#H2 Console: indexes of tables of non-default schemas are now also listed.
@changelog_1352_li
@changelog_1353_li
#Issue 111: Multi-version concurrency / duplicate primary key after rollback.
@changelog_1353_li
@changelog_1354_li
#Issue 110: Multi-version concurrency / wrong exception is thrown.
@changelog_1354_li
@changelog_1355_li
#Parser: sequenceName.NEXTVAL and CURRVAL did not respect the schema search path.
@changelog_1355_li
@changelog_1356_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.
@changelog_1356_li
@changelog_1357_li
#The stack trace of very common exceptions is no longer written to the .trace.db file by default.
@changelog_1357_li
@changelog_1358_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.
@changelog_1358_li
@changelog_1359_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.
@changelog_1359_h2
@changelog_1360_h2
#Version 1.1.117 (2009-08-09)
@changelog_1360_li
@changelog_1361_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.
@changelog_1361_li
@changelog_1362_li
#JaQu: the order of the fields in the database no longer needs to match the order in the database.
@changelog_1362_li
@changelog_1363_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.
@changelog_1363_li
@changelog_1364_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).
@changelog_1364_li
@changelog_1365_li
#Views using functions were not re-evaluated when necessary.
@changelog_1365_li
@changelog_1366_li
#Improved MySQL compatibility for SHOW COLUMNS.
@changelog_1366_li
@changelog_1367_li
#Improved PostgreSQL compatibility for timestamp literals with timezone.
@changelog_1367_li
@changelog_1368_li
#Sergi Vladykin translated the error messages to Russian. Thanks a lot!
@changelog_1368_li
@changelog_1369_li
#Support for Java 6 DatabaseMetaData.getTables, getColumns, getProcedures, and getProcedureColumns.
@changelog_1369_li
@changelog_1370_li
#Issue 101: Rollback of a large transaction (more than 100000 rows) could fail.
@changelog_1370_li
@changelog_1371_li
#Various bugfixes and improvements in the page store mechanism (still experimental).
@changelog_1371_li
@changelog_1372_li
#The functions LENGTH, OCTET_LENGTH, and BIT_LENGTH now return BIGINT.
@changelog_1372_li
@changelog_1373_li
#Data types CLOB and BLOB: the maximum precision was Integer.MAX_VALUE, it is now Long.MAX_VALUE.
@changelog_1373_li
@changelog_1374_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!
@changelog_1374_li
@changelog_1375_li
#Parsing SQL script files is now faster.
@changelog_1375_li
@changelog_1376_li
#CSV reading is now faster.
@changelog_1376_li
@changelog_1377_li
#SimpleResultSet.newInstance(SimpleRowSource rs) did not work.
@cheatSheet_1000_h1
...
...
@@ -8459,7 +8462,7 @@ H2 コンソール アプリケーション
#Eclipse plugin.
@roadmap_1060_li
#Asynchronous queries to support publish/subscribe: SELECT ... FOR READ WAIT [maxMillisToWait].
#Asynchronous queries to support publish/subscribe: SELECT ... FOR READ WAIT [maxMillisToWait]. See also MS SQL Server "Query Notification".
@roadmap_1061_li
#Fulltext search Lucene: analyzer configuration.
...
...
@@ -8924,7 +8927,7 @@ H2 コンソール アプリケーション
#Built-in methods to write large objects (BLOB and CLOB): FILE_WRITE('test.txt', 'Hello World')
@roadmap_1215_li
#MVCC: support transactionally consistent backups using SCRIPT
#MVCC: support transactionally consistent backups using SCRIPT.
@roadmap_1216_li
#Improve time to open large databases (see mail 'init time for distributed setup')
...
...
@@ -9557,7 +9560,7 @@ H2 コンソール アプリケーション
#Make the cache scan resistant (currently a small cache is faster than a large cache for large table scans).
@roadmap_1426_li
#Issue 178: Optimizer: index usage when both ascending and descending indexes are available
#Issue 178: Optimizer: index usage when both ascending and descending indexes are available.
@roadmap_1427_li
#Issue 179: Related subqueries in HAVING clause
...
...
@@ -9608,48 +9611,63 @@ H2 コンソール アプリケーション
#Support CLOB and BLOB update, specially conn.createBlob().setBinaryStream(1);
@roadmap_1443_li
#Triggers: support user defined execution order. Oracle: CREATE OR REPLACE TRIGGER TEST_2 BEFORE INSERT ON TEST FOR EACH ROW FOLLOWS TEST_1. SQL specifies that multiple triggers should be fired in time-of-creation order. PostgreSQL uses name order, which was judged to be more convenient. Derby: triggers are fired in the order in which they were created.
#Optimizer: index usage when both ascending and descending indexes are available. Issue 178.
@roadmap_1444_li
#PostgreSQL compatibility: combine "users" and "roles". See: http://www.postgresql.org/docs/8.1/interactive/user-manag.html
#Triggers: support user defined execution order. Oracle: CREATE OR REPLACE TRIGGER TEST_2 BEFORE INSERT ON TEST FOR EACH ROW FOLLOWS TEST_1. SQL specifies that multiple triggers should be fired in time-of-creation order. PostgreSQL uses name order, which was judged to be more convenient. Derby: triggers are fired in the order in which they were created.
@roadmap_1445_li
#Support NULL with a type: @meta CALL CAST(NULL AS INT) should return INT. See the ValueExpression.java (currently it returns the type of the value; it could have it's own type/precision/scale optionally, for example when created from CAST, which is implemented in Function.java).
#PostgreSQL compatibility: combine "users" and "roles". See: http://www.postgresql.org/docs/8.1/interactive/user-manag.html
@roadmap_1446_li
#Improve documentation of system properties: only list the property names, default values, and description.
#Support NULL with a type: @meta CALL CAST(NULL AS INT) should return INT. See the ValueExpression.java (currently it returns the type of the value; it could have it's own type/precision/scale optionally, for example when created from CAST, which is implemented in Function.java).
@roadmap_1447_li
#Support running totals / cumulative sum using SUM(..) OVER(..).
#Improve documentation of system properties: only list the property names, default values, and description.
@roadmap_1448_li
#Improve object memory size calculation. Use constants for known VMs, or use reflection to call java.lang.instrument.Instrumentation.getObjectSize(Object objectToSize)
#Support running totals / cumulative sum using SUM(..) OVER(..).
@roadmap_1449_li
#Triggers: NOT NULL checks should be done after running triggers (Oracle behavior, maybe others).
#Improve object memory size calculation. Use constants for known VMs, or use reflection to call java.lang.instrument.Instrumentation.getObjectSize(Object objectToSize)
@roadmap_1450_li
#Log long running transactions (similar to long running statements).
#Triggers: NOT NULL checks should be done after running triggers (Oracle behavior, maybe others).
@roadmap_1451_li
#Support schema specific domains.
#Log long running transactions (similar to long running statements).
@roadmap_1452_li
#Some combinations of nested join with right outer join are not supported.
#Support schema specific domains.
@roadmap_1453_li
#Parameter data type is data type of other operand. Issue 205.
@roadmap_1454_li
#Some combinations of nested join with right outer join are not supported.
@roadmap_1455_li
#DatabaseEventListener.openConnection(id) and closeConnection(id).
@roadmap_1454_h2
@roadmap_1456_li
#Compatibility for data type CHAR (Derby, HSQLDB). Issue 212.
@roadmap_1457_li
#Compatibility with MySQL TIMESTAMPDIFF. Issue 209.
@roadmap_1458_li
#Optimizer: use a histogram of the data, specially for non-normal distributions.
@roadmap_1459_h2
#Not Planned
@roadmap_1455_li
@roadmap_1460_li
#HSQLDB (did) support this: select id i from test where i<0 (other databases don't). Supporting it may break compatibility.
@roadmap_1456_li
@roadmap_1461_li
#String.intern (so that Strings can be compared with ==) will not be used because some VMs have problems when used extensively.
@roadmap_1457_li
@roadmap_1462_li
#In prepared statements, identifier names (table names and so on) can not be parameterized. Adding such a feature would complicate the source code without providing reasonable speedup, and would slow down regular prepared statements.
