The MERGE statement now returns 0 as the generated key if the row was updated.
@changelog_1003_li
Running code coverage is now automated.
@changelog_1004_li
A file system implementation can now be registered using FileSystem.register. The database file system is no longer included in the jar file, it moved to the test section.
@changelog_1003_h2
@changelog_1005_h2
Version 1.1.111 (2009-04-10)
@changelog_1004_li
@changelog_1006_li
In-memory databases can now run inside the Google App Engine.
@changelog_1005_li
@changelog_1007_li
Queries that are ordered by an indexed column returned no rows in certain cases (if all rows were deleted from the table previously, and there is a low number of rows in the table, and when not using other conditions, and when using the default b tree index).
@changelog_1006_li
@changelog_1008_li
The wrong exception was thrown when using unquoted text for the SQL statements COMMENT, ALTER USER, and SET PASSWORD.
@changelog_1007_li
@changelog_1009_li
The built-in connection pool did not roll back transactions and enable autocommit enabled after closing a connection.
@changelog_1008_li
@changelog_1010_li
Sometimes a StackOverflow occurred when checking for deadlock. See also http://code.google.com/p/h2database/issues/detail?id=61
@changelog_1009_li
@changelog_1011_li
The Shell tool no longer truncates results with only one column, and displays a message if data was truncated.
@changelog_1010_h2
@changelog_1012_h2
Version 1.1.110 (2009-04-03)
@changelog_1011_li
@changelog_1013_li
Support for not persistent in-memory tables in regular (persistent) databases using CREATE MEMORY TABLE(..) NOT PERSISTENT. Thanks a lot to Sergi Vladykin for the patch!
@changelog_1012_li
@changelog_1014_li
The H2 Console trimmed the password (removed leading and trailing spaces). This is no longer the case, to support encrypted H2 database with an empty user password.
@changelog_1013_li
@changelog_1015_li
The data type of a SUBSTRING method was wrong.
@changelog_1014_li
@changelog_1016_li
ResultSet.findColumn and get methods with column label parameters now also check for matching column names (like most databases except MySQL).
@changelog_1015_li
@changelog_1017_li
H2 Console: the browser system property now supports a list of arguments. Example: java -Dh2.browser="open,-a,Safari,%url" ...
@changelog_1016_li
@changelog_1018_li
Improved Javadoc navigation (similar to Scaladoc).
@changelog_1017_li
@changelog_1019_li
H2 Console: auto-complete of identifiers did not work correctly for H2 databases in MySQL mode.
@changelog_1018_li
@changelog_1020_li
DISTINCT and GROUP BY on a CLOB column was broken.
@changelog_1019_li
@changelog_1021_li
The FTP server moved to the tools section and is no longer included in the h2*.jar file.
@changelog_1020_li
@changelog_1022_li
Improved error message for unsupported features: now the message says what exactly is not supported.
@changelog_1021_li
@changelog_1023_li
Improved OSGi support.
@changelog_1022_li
@changelog_1024_li
Some internal caches did not use the LRU mechanism. Fixed (LOB file list, optimizer cost cache, trace system, view indexes, collection keys, compressed in-memory file system).
@changelog_1023_li
@changelog_1025_li
The API of the tools changed a bit (each tool now returns an exit code).
@changelog_1024_li
@changelog_1026_li
Command line help of the tools now match the javadocs. The build converts the javadocs to a resource that is read by the tool at runtime. This should not have an effect on using the database, but it reduces duplicate and out-of-sync documentation.
@changelog_1025_li
@changelog_1027_li
CREATE TABLE: improved compatibility (support for UNIQUE NOT NULL).
@changelog_1026_li
@changelog_1028_li
DatabaseMetaData.getSQLKeywords now returns the correct list.
@changelog_1027_li
@changelog_1029_li
Deterministic user defined functions did not work when the parameter was a column. Fixed.
@changelog_1028_li
@changelog_1030_li
JdbcConnectionPool.setLoginTimeout with 0 now uses the default timeout.
@changelog_1029_li
@changelog_1031_li
Creating a JdbcConnectionPool has been simplified a bit.
@changelog_1030_li
@changelog_1032_li
The built-in connection pool did not re-use connections. Getting a connection using the built-in JdbcConnectionPool is now about 70 times faster than opening connections using DriverManager.getConnection.
@changelog_1031_li
@changelog_1033_li
More bugs in the server-less multi-connection mode have been fixed: If a process terminated while writing, other open connections were blocked. If two processes were writing to the database, sometimes the database was corrupt after closing.
@changelog_1032_li
@changelog_1034_li
Linked tables to SQLite database can now be created.
@changelog_1033_li
@changelog_1035_li
Nested IN(IN(...)) didn't work.
@changelog_1034_li
@changelog_1036_li
NIO storage: the nio: prefix was using memory mapped files instead of FileChannel.
@changelog_1035_h2
@changelog_1037_h2
Version 1.1.109 (2009-03-14)
@changelog_1036_li
@changelog_1038_li
The optimization for IN(...) is now only used if comparing a column with an index.
@changelog_1037_li
@changelog_1039_li
User defined functions can now be deterministic (see CREATE ALIAS documentation).
@changelog_1038_li
@changelog_1040_li
Multiple nested queries in the FROM clause with parameters did not always work.
@changelog_1039_li
@changelog_1041_li
When converting CLOB to BINARY, each character resulted in one byte. Now, the text is parsed as a hex as when converting VARCHAR.
@changelog_1040_li
@changelog_1042_li
New experimental NIO storage mechanism with both FileChannel and memory mapped files. To use it, use the file name prefix nio: or nioMapped: as in jdbc:h2:nio:~/test. So far it looks like NIO storage is faster on Mac OS but slower on some Windows systems. Thanks a lot to Jan Kotek for the patch!
@changelog_1041_li
@changelog_1043_li
The functions BITOR, BITAND, BITXOR, and MOD now accept and return BIGINT instead of INT.
@changelog_1042_li
@changelog_1044_li
Could not use the same linked table multiple times in the same query.
@changelog_1043_li
@changelog_1045_li
Bugs in the server-less multi-connection mode have been fixed.
@changelog_1044_li
@changelog_1046_li
Column names could not be named "UNIQUE" (with the quotes).
@changelog_1045_li
@changelog_1047_li
New system function TRANSACTION_ID() to get the current transaction identifier for a session.
@changelog_1046_h2
@changelog_1048_h2
Version 1.1.108 (2009-02-28)
@changelog_1047_li
@changelog_1049_li
When the shutdown hook closed the database, the last log file was deleted too early. This could cause uncommitted changes to be persisted.
@changelog_1048_li
@changelog_1050_li
JdbcConnectionPool: it was possible to set a negative connection pool size.
@changelog_1049_li
@changelog_1051_li
Fulltext search did not support table names with a backslash.
@changelog_1050_li
@changelog_1052_li
The internal IntArray class did not work correctly when initialized with a zero length array.
@changelog_1051_li
@changelog_1053_li
The H2 Console web application (war file) did only support ASCII characters. Now UTF-8 is supported.
@changelog_1052_li
@changelog_1054_li
DATEADD does no longer require that the argument is a timestamp.
@changelog_1053_li
@changelog_1055_li
The database file locking mechanism didn't work correctly on Mac OS.
@changelog_1054_li
@changelog_1056_li
Some built-in functions reported the wrong precision, scale, and display size.
@changelog_1055_li
@changelog_1057_li
MySQL compatibility for CREATE TABLE is improved (UNSIGNED, KEY).
@changelog_1056_li
@changelog_1058_li
Recovery did not work if there were more than 255 lobs stored as files.
@changelog_1057_li
@changelog_1059_li
New experimental mode to support multiple read-write connections without starting a server. To enable this mode, append ;FILE_LOCK=SERIALIZED;OPEN_NEW=TRUE to the database URL. Don't expect high performance when multiple concurrent writers.
@changelog_1058_li
@changelog_1060_li
In a web application, the database classes are not unloaded if a connection is open. This may cause out of memory when re-deploying a web application. The DbStarter is changed to close all connections to the configured database (by executing SHUTDOWN).
@changelog_1059_li
@changelog_1061_li
The WebServlet did not close the database when un-deploying the web application.
@changelog_1060_li
@changelog_1062_li
The exception message of failed INSERT or MERGE statements now includes all values and the row number.
@changelog_1061_li
@changelog_1063_li
If opening a database failed with an out of memory exception, some files were not closed.
@changelog_1062_li
@changelog_1064_li
Optimizer: the expected runtime calculation was incorrect. The fixed calculation should give slightly better query plans when using many joins.
@changelog_1063_li
@changelog_1065_li
Improved exception message when connecting to a just started server fails.
@changelog_1064_li
@changelog_1066_li
Connection.isValid is a bit faster.
@changelog_1065_li
@changelog_1067_li
H2 Console: The autocomplete feature has been improved a bit. It can now better parse conditions.
@changelog_1066_li
@changelog_1068_li
When restarting a web application in Tomcat, an exception was thrown sometimes. In most cases this was a NullPointerException. A workaround in H2 has been implemented. The root cause of the problem is now documented in the FAQ: Tomcat sets all static fields (final or non-final) to null when unloading a web application. A workaround is to put the h2.jar in the lib directory, or set the system property org.apache.catalina.loader.WebappClassLoader.ENABLE_CLEAR_REFERENCES to false.
@changelog_1067_h2
@changelog_1069_h2
Version 1.1.107 (2009-01-24)
@changelog_1068_li
@changelog_1070_li
Some DatabaseMetaData operations did not work for non-admin users for versions 1.1.x.
@changelog_1069_li
@changelog_1071_li
The MySQL compatibility extension fromUnixTime now used the English locale.
@changelog_1070_li
@changelog_1072_li
When using LOG=2 and repeatedly updating the last row rows of a table, the index file grew quickly.
@changelog_1071_li
@changelog_1073_li
In versions 1.1.105 and 1.1.106, encrypted script files of earlier versions could not be processed. This is now again possible. The problem was that such script files were stored in a special format (STORAGE=TEXT) but support for this format was removed in version 1.1.105.
@changelog_1072_li
@changelog_1074_li
Enabling the trace mechanism by creating a specially named file is no longer supported.
@changelog_1073_h2
@changelog_1075_h2
Version 1.1.106 (2009-01-04)
@changelog_1074_li
@changelog_1076_li
Statement.setQueryTimeout did not work correctly for some statements.
@changelog_1075_li
@changelog_1077_li
CREATE DOMAIN: Built-in data types can now only be changed if no tables exist.
@changelog_1076_li
@changelog_1078_li
Linked tables: a workaround for Oracle DATE columns has been implemented.
@changelog_1077_li
@changelog_1079_li
DatabaseMetaData.getPrimaryKeys: The column PK_NAME now contains the constraint name instead of the index name (compatibility for PostgreSQL and Derby).
@changelog_1078_li
@changelog_1080_li
Using IN(..) inside a IN(SELECT..) did not always work.
@changelog_1079_li
@changelog_1081_li
Views with IN(..) that used a view itself did not work.
@changelog_1080_li
@changelog_1082_li
Union queries with LIMIT or ORDER BY that are used in a view or subquery did not work.
@changelog_1081_li
@changelog_1083_li
The license change a bit: so far the license was modified to say 'Swiss law'. This is now changed back to the original 'US law'. This was requested by a user, and I don't see a problem.
@changelog_1082_li
@changelog_1084_li
Constraints for local temporary tables now session scoped. So far they were global. Thanks a lot to Eric Faulhaber for finding and fixing this problem!
@changelog_1083_li
@changelog_1085_li
When using the auto-server mode, and if the lock file was modified in the future, the wrong exception was thrown ('Connection is broken' instead of 'Error opening database: Lock file modified in the future').
@changelog_1084_h2
@changelog_1086_h2
Version 1.1.105 (2008-12-19)
@changelog_1085_li
@changelog_1087_li
The setting STORAGE=TEXT is no longer supported.
@changelog_1086_li
@changelog_1088_li
Deleting a database using the tool DeleteDbFiles deleted LOB files of other databases in the same directory.
@changelog_1087_li
@changelog_1089_li
When used in a subquery, LIKE and IN(..) did not work correctly sometimes.
@changelog_1088_li
@changelog_1090_li
The fulltext search documentation has been improved.
@changelog_1089_li
@changelog_1091_li
ARRAY_GET returned the wrong data type (ARRAY). Now it returns VARCHAR.
@changelog_1090_li
@changelog_1092_li
Natural join: the joined columns are not repeated any more when using SELECT *.
@changelog_1091_li
@changelog_1093_li
User defined aggregate functions: the method getType expected internal data types instead of SQL types.
@changelog_1092_li
@changelog_1094_li
User defined aggregate functions did not work if there was no group by expression.
@changelog_1093_li
@changelog_1095_li
MySQL compatibility: support for := assignment as in @sum:=@sum+x
@changelog_1094_li
@changelog_1096_li
INSERT INTO TEST(SELECT * FROM TEST) is now supported.
@changelog_1095_li
@changelog_1097_li
Each session threw an invisible exception when garbage collected.
@changelog_1096_li
@changelog_1098_li
Foreign key constraints that refer to a quoted column did not work.
@changelog_1097_li
@changelog_1099_li
New meta data column INFORMATION_SCHEMA.TABLES.LAST_MODIFICATION to get the table modification counter.
@changelog_1098_li
@changelog_1100_li
Shell: line comments didn't work correctly.
@changelog_1099_li
@changelog_1101_li
H2 Console: Columns are now listed for up to 500 tables instead of 100.
@changelog_1100_li
@changelog_1102_li
H2 Console: Cmd+Enter executes the current statement, Alt+Space for autocomplete.
@changelog_1101_li
@changelog_1103_li
JaQu: the maximum length of a column can now be defined using maxLength. For an example, see Product.java (maxLength(category, 255)).
@changelog_1102_li
@changelog_1104_li
R&\#305;dvan A&\#287;ar has completed the Turkish translation of the H2 Console. Thanks a lot!
@changelog_1103_h2
@changelog_1105_h2
Version 1.1.104 (2008-11-28)
@changelog_1104_li
@changelog_1106_li
If a query that was used like a table contained group by and was ordered by an expression that is not in the column list, an exception was thrown.
@changelog_1105_li
@changelog_1107_li
JaQu: tables are now auto-created when running a query.
@changelog_1106_li
@changelog_1108_li
The optimizer had problems with function tables (for example CSVREAD and FTL_SEARCH). A new system property h2.estimatedFunctionTableRows (default 1000) defines how many rows can be expected in the table.
@changelog_1107_li
@changelog_1109_li
The function SUM could overflow when using large values. It returns now a data type that is safe.
@changelog_1108_li
@changelog_1110_li
The function AVG could overflow when using large values. Fixed.
@changelog_1109_li
@changelog_1111_li
The emergency reserve file has been removed. It didn't provide an appropriate solution for the problem. It is still possible for an application to detect and deal with the low disk space problem (deleting temporary files for example) using DatabaseEventListener.diskSpaceIsLow, but this method is now always called with stillAvailable=0.
@changelog_1110_li
@changelog_1112_li
Build: JAVA_HOME is now automatically detected on Mac OS X.
@changelog_1111_li
@changelog_1113_li
Testing for local connections was very slow on some systems.
@changelog_1112_li
@changelog_1114_li
The cache memory usage calculation is more conservative.
@changelog_1113_li
@changelog_1115_li
Allocating space got slower and slower the larger the database.
@changelog_1114_li
@changelog_1116_li
ALTER TABLE ALTER COLUMN could throw the wrong exception in the last version (Table not found).
@changelog_1115_li
@changelog_1117_li
Updatable result sets: the key columns can now be updated.
@changelog_1116_li
@changelog_1118_li
The H2DatabaseProvider for ActiveObjects is now included in the tools section.
@changelog_1117_li
@changelog_1119_li
The H2Platform for Oracle Toplink Essential has been improved a bit.
@changelog_1118_li
@changelog_1120_li
The Windows service to start H2 didn't work in version 1.1.
@changelog_1119_li
@changelog_1121_li
File systems with a maximum file size (for example FAT) are now supported using the file prefix 'split:'. In this case the files are split in parts of 1 GB. Example URL: jdbc:h2:split:~/db/test. If you want to split into parts of 1 MB, use jdbc:h2:split:20:~/db/test (the part size is 1 << x, the default is 30 meaning 1 GB).
@changelog_1120_li
@changelog_1122_li
The database now tries to detect if the classloader or virtual machine has almost shut down by checking if static final variables are set to null. This should help reduce exceptions when stopping the web application.
@changelog_1121_li
@changelog_1123_li
Compatibility for MS SQL Server DATEDIFF(YYYY, .., ..)
@changelog_1122_li
@changelog_1124_li
ResultSet.getObject for CLOB or BLOB will return a java.sql.Clob / java.sql.Blob object instead of a java.io.Reader / java.io.InputStream as in version 1.0. This behavior can be changed using the system property h2.returnLobObjects (true by default for version 1.1).
@changelog_1123_li
@changelog_1125_li
The interface CloseListener has a new method 'remove' that is called when the trigger is dropped.
@changelog_1124_li
@changelog_1126_li
Fulltext search: there was a memory leak when creating and dropping fulltext indexes in a loop.
@changelog_1125_h2
@changelog_1127_h2
Version 1.1.103 (2008-11-07)
@changelog_1126_li
@changelog_1128_li
Could not order by a formula when the formula was in the group by list but not in the select list.
@changelog_1127_li
@changelog_1129_li
Date values that match the daylight saving time end were not allowed in times zones were the daylight saving time ends at midnight, for years larger than 2037. Example: timezone Brasilia, date 2042-10-12. This is a problem of Java, however a workaround is implemented in H2 that solves most problems (except the problems of java.util.Date itself).
@changelog_1128_li
@changelog_1130_li
ALTER TABLE used a lot of memory when using multi-version concurrency.
@changelog_1129_li
@changelog_1131_li
Referential integrity for in-memory databases didn't work in some cases in version 1.1.102.
@changelog_1130_li
@changelog_1132_li
New column INFORMATION_SCHEMA.COLUMNS.SEQUENCE_NAME to get the name of the sequence for auto-increment columns.
@changelog_1131_li
@changelog_1133_li
Aliases for built-in data types (such as MEDIUMBLOB which is an alias for BLOB) can now be re-mapped to another data type using CREATE DOMAIN. However main built-in data types (such as INTEGER) can not be re-mapped.
@changelog_1132_li
@changelog_1134_li
The Japanese translation has been completed by Masahiro Ikemoto. Thanks a lot!
@changelog_1133_li
@changelog_1135_li
Improved PostgreSQL compatibility for NEXTVAL and CURRVAL.
@changelog_1134_li
@changelog_1136_li
Less heap memory is needed when multiple databases are open at the same time: The memory reserve (used to rollback after out of memory) is now global and no longer allocated for each database separately.
@changelog_1135_li
@changelog_1137_li
New system property h2.browser to set the browser to use.
@changelog_1136_li
@changelog_1138_li
To start the browser, java.awt.Desktop.browse is now used if available.
@changelog_1137_h2
@changelog_1139_h2
Version 1.1.102 (2008-10-24)
@changelog_1138_li
@changelog_1140_li
The French translation of the H2 Console has been improved by Olivier Parent. Thanks a lot!
@changelog_1139_li
@changelog_1141_li
There was a memory leak when creating and dropping tables and indexes in a loop (persistent database only).
@changelog_1140_li
@changelog_1142_li
SET LOG 2 was not effective if executed after opening the database.
@changelog_1141_li
@changelog_1143_li
Translating the H2 Console is now simpler.
@changelog_1142_li
@changelog_1144_li
Common exception (error code 23*) are no longer written to the .trace.db file by default.
@changelog_1143_li
@changelog_1145_li
In-memory databases don't write LOBs to files any longer.
@changelog_1144_li
@changelog_1146_li
Self referencing constraints didn't restrict deleting rows that reference itself if there is another row that references it.
@changelog_1145_li
@changelog_1147_li
ResultSetMetaData.getColumnName now returns the alias name except for columns.
@changelog_1146_li
@changelog_1148_li
Temporary files are now deleted when the database is closed, even if they were not garbage collected so far.
@changelog_1147_h2
@changelog_1149_h2
Version 1.1.101 (2008-10-17)
@changelog_1148_li
@changelog_1150_li
Errors with code 42000 - 42999 are no longer written to the trace file by default.
@changelog_1149_li
@changelog_1151_li
Queries with more than 10 tables are now faster.
@changelog_1150_li
@changelog_1152_li
Opening a connection with AUTO_SERVER=TRUE is now fast when the database is already open in another process (less than 0.01 seconds instead of 2 seconds).
@changelog_1151_li
@changelog_1153_li
IF [NOT] EXISTS is supported for named constraints in ALTER TABLE ... ADD/DROP CONSTRAINT.
@changelog_1152_li
@changelog_1154_li
The error messages have been translated to Spanish by Dario V. Fassi. Thanks a lot!
@changelog_1153_li
@changelog_1155_li
Linked tables: the automatic connection sharing didn't work. Actually the system property h2.shareLinkedConnections was working in the opposite direction: it was disabled when set to true. Now it works as expected.
@changelog_1154_li
@changelog_1156_li
Opening large database is now faster.
@changelog_1155_li
@changelog_1157_li
New system property h2.socketConnectTimeout, the timeout in milliseconds to connect to a server. The default is 2000 (2 seconds).
@changelog_1156_li
@changelog_1158_li
The wrong parameters were bound to subqueries with parameters, specially when using IN(SELECT ...) and IN(...).
@changelog_1157_li
@changelog_1159_li
Unset parameters were not detected when the query was re-compiled.
@changelog_1158_li
@changelog_1160_li
New functions ISO_YEAR, ISO_WEEK, ISO_DAY_OF_WEEK. Thanks a lot to Robert Rathsack for implementing those!
@changelog_1159_li
@changelog_1161_li
The date functions DAYOFYEAR, DAYOFMONTH, DAYOFWEEK are now called DAY_OF_YEAR, DAY_OF_MONTH, DAY_OF_WEEK (the old names still work).
@changelog_1160_li
@changelog_1162_li
An out of memory error while deleting or updating many rows could result in a strange exception.
@changelog_1161_li
@changelog_1163_li
Linked tables: compatibility with MS SQL Server has been improved.
@changelog_1162_li
@changelog_1164_li
Renaming tables that have foreign keys with cascade didn't work correctly.
@changelog_1163_li
@changelog_1165_li
The auto-reconnect feature didn't work when using the auto-server mode. Fixed.
@changelog_1164_li
@changelog_1166_li
Fulltext search: new method FT_DROP_INDEX.
@changelog_1165_li
@changelog_1167_li
The optimization to group using an index didn't work in some cases in version 1.1 (see also system property h2.optimizeGroupSorted).
@changelog_1166_li
@changelog_1168_li
OSGi meta data is included in the manifest file. An OSGi BundleActivator is included: it loads the database driver when starting the bundle, and unloads it when stopping the bundle.
@changelog_1167_li
@changelog_1169_li
The default value for MAX_MEMORY_UNDO is now 50000.
@changelog_1168_li
@changelog_1170_li
For alias columns, ResultSetMetaData.getTableName() and getColumnName() now return the real table and column name in the default mode.
@changelog_1169_li
@changelog_1171_li
In SQL scripts created with SCRIPT TO, schemas are now only created if they don't exist yet.
@changelog_1170_li
@changelog_1172_li
After re-connecting to a database, the database event listener (if set) is informed about it.
@changelog_1171_li
@changelog_1173_li
Local temporary tables now support indexes. Thanks a lot to Matt Roy!
@changelog_1172_li
@changelog_1174_li
RUNSCRIPT no longer uses a temporary file.
@changelog_1173_li
@changelog_1175_li
New system table INFORMATION_SCHEMA.SESSION_STATE containing the SQL statements that make up the session state. The list currently contains variables (SET @..) and local temporary tables (without data).
@changelog_1174_li
@changelog_1176_li
After an automatic re-connect, part of the session state stays (the part that is stored in the SESSION_STATE table).
@changelog_1175_li
@changelog_1177_li
The build didn't work if the directory temp didn't exist before.
@changelog_1176_li
@changelog_1178_li
New system property h2.maxReconnect (default 3) to limit the number of re-connects for the same SQL statement (this is usually only important for SHUTDOWN).
@changelog_1177_li
@changelog_1179_li
WHERE .. IN (SELECT ...) could throw a NullPointerException.
@changelog_1178_li
@changelog_1180_li
Improved Glassfish / Toplink support in H2Platform thanks to Marcio Borges from Brazil. Thanks a lot!
@changelog_1179_h2
@changelog_1181_h2
Version 1.1.100 (2008-10-04)
@changelog_1180_li
@changelog_1182_li
In version 1.1, the following system properties are now enabled by default: h2.lobFilesInDirectories, h2.optimizeGroupSorted, h2.optimizeInJoin, h2.shareLinkedConnections
@changelog_1181_li
@changelog_1183_li
The H2 Console tool now works with the JDBC-ODBC bridge.
@changelog_1182_li
@changelog_1184_li
The H2 Console tool now supports command line options to start things separately.
@changelog_1183_li
@changelog_1185_li
Large objects did not work for in-memory databases in server mode in Linux.
@changelog_1184_li
@changelog_1186_li
Connections from a local address other than 'localhost' were not allowed if remote connections were disabled. This was always a problem, but only got visible in the last release because the server no longer connects to 'localhost' if networked.
@changelog_1185_li
@changelog_1187_li
The h2console.war can now be built using the Java build.
@changelog_1186_li
@changelog_1188_li
By default, databases are shared in the same process. For read-only databases this causes unnecessary synchronization, but safes memory. If you want that each connection opens its own database, append ;OPEN_NEW=TRUE to the database URL.
@changelog_1187_li
@changelog_1189_li
New auto-reconnect feature will cause the JDBC driver to reconnect to the database if the connection is lost. To enable, append ;AUTO_RECONNECT=TRUE to the database URL. This is specially helpful when using AUTO_SERVER. AUTO_SERVER automatically uses auto-reconnect.
@changelog_1188_li
@changelog_1190_li
CreateCluster: the property 'serverlist' is now called 'serverList'.
@changelog_1189_li
@changelog_1191_li
The ConvertTraceFile tool could not parse some files because the trace mechanism did not encode prepared statement parameters.
@changelog_1190_li
@changelog_1192_li
Databases names can now be one character long (the minimum size used to be 2 characters).
@changelog_1191_h2
@changelog_1193_h2
Version 1.0.79 (2008-09-26)
@changelog_1192_li
@changelog_1194_li
Linked tables that point to the same database can now share the connection within the same database. Access to the same connection is serialized. To enable this feature, set the system property h2.shareLinkedConnections to true.
@changelog_1193_li
@changelog_1195_li
Multiple processes can now access the same database without having to explicitly start the server. To do that, append ;AUTO_SERVER=TRUE to the database URL. In this case, the server is started automatically if the connection is in embedded mode, and the server mode is used if a server is running. If the process that opened the first connection is closed, the other client need to reconnect (there is no automatic re-connect so far). Remote connections are allowed, but only to this database.
@changelog_1194_li
@changelog_1196_li
The server tool now displays the correct IP address if networked.
@changelog_1195_li
@changelog_1197_li
Can now start a TCP server with port 0 (automatically select a port).
@changelog_1196_li
@changelog_1198_li
Result sets with just a unique index can now be updated (previously a primary key was required).
@changelog_1197_li
@changelog_1199_li
LINKED TABLE: the schema name can now be set. When multiple tables exist in different schema, and the schema name is not set, an exception is thrown.
@changelog_1198_li
@changelog_1200_li
LINKED TABLE: worked around a bug in Oracle with the CHAR data type.
@changelog_1199_li
@changelog_1201_li
Faster hash code calculation for large binary arrays.
@changelog_1200_li
@changelog_1202_li
Faster storage re-use algorithm thanks to Greg Dhuse from cleversafe.com.
@changelog_1201_li
@changelog_1203_li
The database supports the SHOW command for better MySQL and PostgreSQL compatibility.
@changelog_1202_li
@changelog_1204_li
The H2 Console now abbreviates large texts in results.
@changelog_1203_li
@changelog_1205_li
Multiple UNION queries could not be used in derived tables.
@changelog_1204_li
@changelog_1206_li
Linked tables can now be read-only.
@changelog_1205_li
@changelog_1207_li
Temporary linked tables are now supported.
@changelog_1206_li
@changelog_1208_li
It was possible to create tables in read-only databases.
@changelog_1207_li
@changelog_1209_li
SET SCHEMA_SEARCH_PATH is now documented.
@changelog_1208_li
@changelog_1210_li
SET SCHEMA did not work for views.
@changelog_1209_li
@changelog_1211_li
Row level locking for MVCC is now enabled. The exception 'Concurrent update in table ...' is still thrown, but only after the lock timeout.
@changelog_1210_li
@changelog_1212_li
The maximum log file size setting was ignored for large databases.
@changelog_1211_li
@changelog_1213_li
Multi-Version Concurrency (MVCC) may no longer be used when using the multi-threaded kernel feature (MULTI_THREADED). An exception is thrown when trying to connect with both settings. Additional synchronization is required before those features can be used together.
@changelog_1212_li
@changelog_1214_li
The data type JAVA_OBJECT could not be used in updatable result sets.
@changelog_1213_li
@changelog_1215_li
The system property h2.optimizeInJoin did not work correctly.
@changelog_1214_li
@changelog_1216_li
Conditions such as ID=? AND ID>? were slow.
@changelog_1215_h2
@changelog_1217_h2
Version 1.0.78 (2008-08-28)
@changelog_1216_li
@changelog_1218_li
The documentation no longer uses a frameset (except the Javadocs).
@changelog_1217_li
@changelog_1219_li
When using DB_CLOSE_DELAY, sometimes a NullPointerException is thrown when the database is opened almost at the same time as it is closed automatically. Thanks a lot to Dmitry Pekar for finding this!
@changelog_1218_li
@changelog_1220_li
Java methods with variable number of parameters can now be used (for Java 1.5 or newer).
@changelog_1219_li
@changelog_1221_li
The Japanese translation has been improved by Masahiro Ikemoto. Thanks a lot!
@changelog_1220_li
@changelog_1222_li
The H2 Console replaced an empty user name with a single space.
@changelog_1221_li
@changelog_1223_li
The build target 'build jarSmall' now includes the embedded database.
@changelog_1222_li
@changelog_1224_li
JdbcDataSource now keeps the password in a char array where possible.
@changelog_1223_li
@changelog_1225_li
ResultSet.absolute did not always work with large result sets.
@changelog_1224_li
@changelog_1226_li
Column aliases can now be used in GROUP BY and HAVING.
@changelog_1225_li
@changelog_1227_li
Jason Brittain has contributed MySQL date functions. Thanks a lot! They are not in the h2.jar file currently, but in src/tools/org/h2/mode/FunctionsMySQL.java. To install, add this class to the classpath and call FunctionsMySQL.register(conn) in the Java code.
@changelog_1226_h2
@changelog_1228_h2
Version 1.0.77 (2008-08-16)
@changelog_1227_li
@changelog_1229_li
JaQu is now using prepared statements and supports Date, Time, Timestamp.
@changelog_1228_li
@changelog_1230_li
When using remote in-memory databases, large LOB objects did not work.
@changelog_1229_li
@changelog_1231_li
Timestamp columns such as TIMESTAMP(6) were not compatible to other database.
@changelog_1230_li
@changelog_1232_li
Opening a large database was slow if there was a problem opening the previous time.
@changelog_1231_li
@changelog_1233_li
NOT IN(SELECT ...) was incorrect if the subquery returns no rows.
@changelog_1232_li
@changelog_1234_li
CREATE TABLE AS SELECT did not work correctly in the multi-version concurrency mode.
@changelog_1233_li
@changelog_1235_li
Support a comma before closing a list, as in: create table test(id int,)
@changelog_1234_li
@changelog_1236_li
MySQL compatibility: linked tables had lower case column names on some systems.
@changelog_1235_li
@changelog_1237_li
DB2 compatibility: the DB2 fetch-first-clause is supported.
@changelog_1236_li
@changelog_1238_li
Oracle compatibility: old style outer join syntax using (+) did work correctly sometimes.
@changelog_1237_li
@changelog_1239_li
ResultSet.setFetchSize is now supported.
@changelog_1238_li
@changelog_1240_li
It has been reported that when using Install4j on some Linux systems and enabling the 'pack200' option, the h2.jar becomes corrupted by the install process, causing application failure. A workaround is to add an empty file h2.jar.nopack next to the h2.jar file. The reason for this problem is not known.
@changelog_1239_h2
@changelog_1241_h2
Version 1.0.76 (2008-07-27)
@changelog_1240_li
@changelog_1242_li
The comment of a domain (user defined data type) is now used as the default column comment when creating a column with this domain.
@changelog_1241_li
@changelog_1243_li
Invalid database names are now detected and a better error message is thrown.
@changelog_1242_li
@changelog_1244_li
ResultSetMetaData.getColumnClassName now returns the correct class name for BLOB and CLOB.
@changelog_1243_li
@changelog_1245_li
Fixed the Oracle mode: Oracle allows multiple rows only where all columns of the unique index are NULL.
@changelog_1244_li
@changelog_1246_li
There is a problem with Hibernate when using Boolean columns. A patch for Hibernate has been submitted at http://opensource.atlassian.com/projects/hibernate/browse/HHH-3401
@changelog_1245_li
@changelog_1247_li
ORDER BY on tableName.columnName didn't work correctly if the column name was also used as an alias.
@changelog_1246_li
@changelog_1248_li
H2 Console: The progress display when opening a database has been improved.
@changelog_1247_li
@changelog_1249_li
The error message when the server doesn't start has been improved.
@changelog_1248_li
@changelog_1250_li
Key values can now be changed in updatable result sets.
@changelog_1249_li
@changelog_1251_li
Changes in updatable result sets are now visible even when resetting the result set.
@changelog_1250_li
@changelog_1252_li
Temporary files were sometimes deleted too late when executing large insert, update, or delete operations.
@changelog_1251_li
@changelog_1253_li
The database file was growing after deleting many rows, and after large update operations.
@changelog_1252_h2
@changelog_1254_h2
Version 1.0.75 (2008-07-14)
@changelog_1253_li
@changelog_1255_li
Multi version concurrency (MVCC): when a row was updated or deleted, but this change was rolled back, the row was not visible by other sessions if no index was used to access it. Fixed.
@changelog_1254_li
@changelog_1256_li
Views with multiple joined tables (where one was an outer join) couldn't be used in some cases. Fixed.
@changelog_1255_li
@changelog_1257_li
The CSVREAD method did not process NULL correctly when using a whitespace field separator.
@changelog_1256_li
@changelog_1258_li
Fixed the Oracle mode: Oracle allows multiple rows with NULL in a unique index.
@changelog_1257_li
@changelog_1259_li
Running out of memory could result in incomplete transactions or corrupted databases. Fixed.
@changelog_1258_li
@changelog_1260_li
When using order by in a query that uses the same table multiple times, the order could be incorrect. Fixed.
@changelog_1259_li
@changelog_1261_li
Referential constraint checking improvement: now the constraint is only checked if the key column values change.
@changelog_1260_li
@changelog_1262_li
Some database metadata calls returned the wrong data type for DATA_TYPE columns.
@changelog_1261_li
@changelog_1263_li
The Lucene fulltext index was empty when opening a database with fulltext index enabled, and re-indexing it didn't work. Fixed.
@changelog_1262_li
@changelog_1264_li
The character '$' could not be used in identifier names (table name, column names and so on). Fixed.
@changelog_1263_li
@changelog_1265_li
The new method org.h2.tools.Server.startWebServer(conn) starts the H2 Console to inspect a database while debugging.
@changelog_1264_li
@changelog_1266_li
Stopping a WebServer didn't always work. Fixed.
@changelog_1265_h2
@changelog_1267_h2
Version 1.0.74 (2008-06-21)
@changelog_1266_li
@changelog_1268_li
Work on row level locking has been started (but there is nothing usable yet).
@changelog_1267_li
@changelog_1269_li
JaQu (Java Query), a tool similar to LINQ (Language Integrated Query; from Microsoft) is now included under src/tools/org/h2/jaqu. A small sample application is included under src/test/org/h2/test/jaqu.
@changelog_1268_li
@changelog_1270_li
The source code is now switched to Java 1.6 by default. To switch back to Java 1.4, run 'build compile'. The h2.jar file is still Java 1.4.
@changelog_1269_li
@changelog_1271_li
The ChangePassword tool is now called ChangeFileEncryption.
@changelog_1270_li
@changelog_1272_li
It is no longer allowed to create columns with the data type NULL. Also, it is no longer allowed to convert a column to the data type NULL. This was possible before but caused data loss.
@changelog_1271_li
@changelog_1273_li
When using computed columns or default values with a different data type than the column data type, a class cast exception could occur. Fixed.
@changelog_1272_li
@changelog_1274_li
Opening databases larger than 1 GB was sometimes very slow if a lot of data was deleted previously. Fixed.
@changelog_1273_li
@changelog_1275_li
RUNSCRIPT could throw a NullPointerException if the script name was an expression.
@changelog_1274_li
@changelog_1276_li
Improved compatibility. New compatibility modes for Oracle and Derby. New compatibility flag uniqueIndexNullDistinct to only allow one row with 'NULL' in a unique index. This flag is enabled for Derby, Oracle, MSSQLServer, and HSQLDB.
@changelog_1275_li
@changelog_1277_li
Linked tables: To view the statements that are executed against the target table, set the trace level to 3.
@changelog_1276_li
@changelog_1278_li
RunScript tool: new options to show and check the results of queries.
@changelog_1277_li
@changelog_1279_li
Deadlocks are now detected. One transaction is rolled back automatically.
@changelog_1278_li
@changelog_1280_li
The Lucene fulltext index was always re-created when opening a database with fulltext index enabled.
@changelog_1279_li
@changelog_1281_li
Support for overloaded Java methods. A user defined function can now be bound to multiple Java methods, if the Java methods have the same name but a different number of parameters. Thanks to Gary Tong for providing a patch!
@changelog_1280_h2
@changelog_1282_h2
Version 1.0.73 (2008-05-31)
@changelog_1281_li
@changelog_1283_li
ParameterMetaData now returns the right data type for most conditions, as in WHERE ID=?.
@changelog_1282_li
@changelog_1284_li
The table SYSTEM_RANGE now supports expressions and parameters.
@changelog_1283_li
@changelog_1285_li
New column INFORMATION_SCHEMA.CONSTRAINTS.UNIQUE_INDEX_NAME that contains the name of the unique index used to enforce this constraint, if there is such an index.
@changelog_1284_li
@changelog_1286_li
SET QUERY_TIMEOUT and Statement.setQueryTimeout no longer commits a transaction. The same applies to SET @VARIABLE, SET LOCK_TIMEOUT, SET TRACE_LEVEL_*, SET THROTTLE, and SET PATH.
@changelog_1285_li
@changelog_1287_li
The SCRIPT command does now emit IF NOT EXISTS for CREATE ROLE.
@changelog_1286_li
@changelog_1288_li
MySQL compatibility: auto_increment column are no longer automatically converted to primary key columns.
@changelog_1287_li
@changelog_1289_li
PostgreSQL compatibility: support for BOOL_OR and BOOL_AND aggregate functions.
@changelog_1288_li
@changelog_1290_li
Negative scale values for DECIMAL or NUMBER columns are now supported in regular tables and in linked tables.
@changelog_1289_li
@changelog_1291_li
A role or right can now be granted or revoked multiple times without getting an exception.
@changelog_1290_li
@changelog_1292_li
Infinite numbers in SQL scripts are listed as POWER(0, -1)), negative infinite as (-POWER(0, -1)), and NaN (not a number) as SQRT(-1).
@changelog_1291_li
@changelog_1293_li
The special double and float values 'NaN' (not a number) did not work correctly when sorting or comparing.
@changelog_1292_li
@changelog_1294_li
The fulltext search did not support CLOB data types.
@changelog_1293_li
@changelog_1295_li
If the drive with the database files was disconnected or unmounted while writing, sometimes a stack overflow exception was thrown instead of a IO exception.
@changelog_1294_li
@changelog_1296_li
The H2 Console could not be shut down from within the tool if the browser supports keepAlive (most browsers do).
@changelog_1295_li
@changelog_1297_li
If the password was passed as a char array, it was kept in an internal buffer longer than required. Theoretically the password could have been stolen if the main memory was swapped to disk before the garbage collection was run.
@changelog_1296_h2
@changelog_1298_h2
Version 1.0.72 (2008-05-10)
@changelog_1297_li
@changelog_1299_li
Some databases could not be opened when appending ;RECOVER=1 to the database URL.
@changelog_1298_li
@changelog_1300_li
The Japanese translation of the error messages and the H2 Console has been completed by Masahiro Ikemoto (Arizona Design Inc.)
@changelog_1299_li
@changelog_1301_li
Updates made to updatable rows are now visible within the same result set. DatabaseMetaData.ownUpdatesAreVisible now returns true.
@changelog_1300_li
@changelog_1302_li
ParameterMetaData now returns the correct data for INSERT and UPDATE statements.
@changelog_1301_li
@changelog_1303_li
H2 Shell: DESCRIBE now supports an schema name.
@changelog_1302_li
@changelog_1304_li
A subset of the PostgreSQL 'dollar quoting' feature is now supported.
@changelog_1303_li
@changelog_1305_li
SLF4J is now supported by using adding TRACE_LEVEL_FILE=4 to the database URL.
@changelog_1304_li
@changelog_1306_li
The recovery tool did not work if the table name contained spaces or if there was a comment on the table.
@changelog_1305_li
@changelog_1307_li
Triggers are no longer executed when changing the table structure (ALTER TABLE).
@changelog_1306_li
@changelog_1308_li
When setting BLOB or CLOB values larger than 65 KB using a remote connection, temporary files were kept on the client longer than required (until the connection was closed or the object is garbage collected). Now they are removed as soon as the PreparedStatement is closed, or when the value is overwritten.
@changelog_1307_li
@changelog_1309_li
Statements can now be canceled remotely (when using remote connections).
@changelog_1308_li
@changelog_1310_li
The Shell tool now uses java.io.Console to read the password when using JDK 1.6
@changelog_1309_li
@changelog_1311_li
When using read-only databases and setting LOG=2, an exception was written to the trace file when closing the database. Fixed.
@changelog_1310_h2
@changelog_1312_h2
Version 1.0.71 (2008-04-25)
@changelog_1311_li
@changelog_1313_li
H2 is now dual-licensed under the Eclipse Public License (EPL) and the old 'H2 License' (which is basically MPL).
@changelog_1312_li
@changelog_1314_li
Sometimes an exception 'File ID mismatch' or 'try to add a record twice' occurred after large records (8 KB or larger) are updated or deleted. See also http://code.google.com/p/h2database/issues/detail?id=22
@changelog_1313_li
@changelog_1315_li
H2 Console: The tools can now be translated (it didn't work in the last release).
@changelog_1314_li
@changelog_1316_li
New traditional Chinese translation. Thanks a lot to Derek Chao!
@changelog_1315_li
@changelog_1317_li
Indexes were not used when enabling the optimization for IN(SELECT...) (system property h2.optimizeInJoin).
@changelog_1316_h2
@changelog_1318_h2
Version 1.0.70 (2008-04-20)
@changelog_1317_li
@changelog_1319_li
The plan is to dual-license H2. The additional license is EPL (Eclipse Public License). The current license (MPL, Mozilla Public License) will stay. Current users are not affected because they can keep MPL. EPL is very similar to MPL, the only bigger difference is related to patents (EPL is a bit more business friendly in this regard). See also http://opensource.org/licenses/eclipse-1.0.php, http://www.eclipse.org/legal/eplfaq.php (FAQ), http://blogs.zdnet.com/Burnette/?p=131
@changelog_1318_li
@changelog_1320_li
Multi version concurrency (MVCC): when a row was updated, and the updated column was not indexed, this update was visible sometimes for other sessions even if it was not committed.
@changelog_1319_li
@changelog_1321_li
Calling SHUTDOWN on one connection and starting a query on another connection concurrently could result in a Java level deadlock.
@changelog_1320_li
@changelog_1322_li
New system property h2.enableAnonymousSSL (default: true) to enable anonymous SSL connections.
@changelog_1321_li
@changelog_1323_li
The precision if SUBSTR is now calculated if possible.
@changelog_1322_li
@changelog_1324_li
The autocomplete in the H2 Console has been improved a bit.
@changelog_1323_li
@changelog_1325_li
The tools in the H2 Console are now translatable.
@changelog_1324_li
@changelog_1326_li
The servlet and lucene jar files are now automatically downloaded when building.
@changelog_1325_li
@changelog_1327_li
The code switch tool has been replaced by a simpler tool called SwitchSource that just uses find and replace.
@changelog_1326_li
@changelog_1328_li
Started to write a Ant replacement ('JAnt') that uses pure Java build definitions. Advantages: ability to debug the build, extensible, flexible, no XML, a bit faster. Future plan: support creating custom h2 distributions (for embedded use). Maybe create a new project 'Jant' or 'Javen' if other people are interested.
@changelog_1327_li
@changelog_1329_li
The jar file is now about 10% smaller because the variable debugging info is no longer included. The source file and line number debugging info is still included. If required, the jar file size of the full version can be further reduced to about 720 KB using 'build jarSmall' or even more by removing unneeded components.
@changelog_1328_li
@changelog_1330_li
Added shell scripts run.sh and build.sh. chmod +x is required, but otherwise it should work. Feedback or improvements are welcome!
@changelog_1329_li
@changelog_1331_li
Databases in zip files: large queries are now supported. Temp files are created in the temp directory if required. The documentation how to create the zip file has been corrected.
The Japanese translation of the error messages and the H2 Console has been improved. Thanks a lot to Masahiro IKEMOTO.
@changelog_1332_li
@changelog_1334_li
Optimization for MIN() and MAX() when using MVCC.
@changelog_1333_li
@changelog_1335_li
To protect against remote brute force password attacks, the delay after each unsuccessful login now gets double as long. New system properties h2.delayWrongPasswordMin and h2.delayWrongPasswordMax.
@changelog_1334_li
@changelog_1336_li
After setting the query timeout and then resetting it, the next query would still timeout. Fixed.
@changelog_1335_li
@changelog_1337_li
Adding a IDENTITY column to a table with data threw a lock timeout.
@changelog_1336_li
@changelog_1338_li
OutOfMemoryError could occur when using EXISTS or IN(SELECT ..).
@changelog_1337_li
@changelog_1339_li
The built-in connection pool is not called JdbcConnectionPool. The API and documentation has been changed.
@changelog_1338_li
@changelog_1340_li
The ConvertTraceFile tool now generates SQL statement statistics at the end of the SQL script file (similar to the profiling data generated when using java -Xrunhprof).
@changelog_1339_li
@changelog_1341_li
Nested joins are now supported (A JOIN B JOIN C ON .. ON ..)
@download_1000_h1
...
...
@@ -7505,682 +7511,682 @@ Support triggers for INFORMATION_SCHEMA tables (to better support PostgreSQL cat
Full outer joins
@roadmap_1028_li
Support trigger on the tables information_schema.tables and ...columns
Maven: deploy / upload h2..-sources.jar and javadocs as well.
@roadmap_1029_li
Test very large databases and LOBs (up to 256 GB)
Support trigger on the tables information_schema.tables and ...columns
@roadmap_1030_li
Support hints for the optimizer (which index to use, enforce the join order).
Test very large databases and LOBs (up to 256 GB)
@roadmap_1031_li
Change LOB mechanism (less files, keep index of lob files, point to files and row, delete unused files earlier, maybe bundle files into a tar file)
Support hints for the optimizer (which index to use, enforce the join order).
@roadmap_1032_li
Clustering: recovery needs to becomes fully automatic. Global write lock feature.
Change LOB mechanism (less files, keep index of lob files, point to files and row, delete unused files earlier, maybe bundle files into a tar file)
@roadmap_1033_li
Support mixed clustering mode (one embedded, the other server mode)
Clustering: recovery needs to becomes fully automatic. Global write lock feature.
@roadmap_1034_li
Sequence: add features [NO] MINVALUE, MAXVALUE, CYCLE
Support mixed clustering mode (one embedded, the other server mode)
Linked schema using CSV files: one schema for a directory of files; support indexes for CSV files
@roadmap_1070_li
Implement missing JDBC API (CallableStatement,...)
iReport to support H2
@roadmap_1071_li
Compression of the cache
Implement missing JDBC API (CallableStatement,...)
@roadmap_1072_li
Include SMPT (mail) server (at least client) (alert on cluster failure, low disk space,...)
Compression of the cache
@roadmap_1073_li
Drop with restrict (currently cascade is the default)
Include SMPT (mail) server (at least client) (alert on cluster failure, low disk space,...)
@roadmap_1074_li
JSON parser and functions
Drop with restrict (currently cascade is the default)
@roadmap_1075_li
Automatic collection of statistics (auto ANALYZE)
JSON parser and functions
@roadmap_1076_li
Server: client ping from time to time (to avoid timeout - is timeout a problem?)
Automatic collection of statistics (auto ANALYZE)
@roadmap_1077_li
Copy database: Tool with config GUI and batch mode, extensible (example: compare)
Server: client ping from time to time (to avoid timeout - is timeout a problem?)
@roadmap_1078_li
Document, implement tool for long running transactions using user-defined compensation statements.
Copy database: Tool with config GUI and batch mode, extensible (example: compare)
@roadmap_1079_li
Support SET TABLE DUAL READONLY
Document, implement tool for long running transactions using user-defined compensation statements.
@roadmap_1080_li
GCJ: what is the state now?
Support SET TABLE DUAL READONLY
@roadmap_1081_li
Events for: Database Startup, Connections, Login attempts, Disconnections, Prepare (after parsing), Web Server (see http://docs.openlinksw.com/virtuoso/fn_dbev_startup.html)
GCJ: what is the state now?
@roadmap_1082_li
Optimization: Log compression
Events for: Database Startup, Connections, Login attempts, Disconnections, Prepare (after parsing), Web Server (see http://docs.openlinksw.com/virtuoso/fn_dbev_startup.html)
@roadmap_1083_li
Support standard INFORMATION_SCHEMA tables, as defined in http://www.contrib.andrew.cmu.edu/~shadow/sql/sql1992.txt; specially KEY_COLUMN_USAGE (http://dev.mysql.com/doc/refman/5.0/en/information-schema.html, http://www.xcdsql.org/Misc/INFORMATION_SCHEMA%20With%20Rolenames.gif)
Optimization: Log compression
@roadmap_1084_li
Compatibility: in MySQL, HSQLDB, /0.0 is NULL; in PostgreSQL, Derby: Division by zero
Support standard INFORMATION_SCHEMA tables, as defined in http://www.contrib.andrew.cmu.edu/~shadow/sql/sql1992.txt; specially KEY_COLUMN_USAGE (http://dev.mysql.com/doc/refman/5.0/en/information-schema.html, http://www.xcdsql.org/Misc/INFORMATION_SCHEMA%20With%20Rolenames.gif)
@roadmap_1085_li
Functional tables should accept parameters from other tables (see FunctionMultiReturn) SELECT * FROM TEST T, P2C(T.A, T.R)
Compatibility: in MySQL, HSQLDB, /0.0 is NULL; in PostgreSQL, Derby: Division by zero
@roadmap_1086_li
Custom class loader to reload functions on demand
Functional tables should accept parameters from other tables (see FunctionMultiReturn) SELECT * FROM TEST T, P2C(T.A, T.R)
@roadmap_1087_li
Test http://mysql-je.sourceforge.net/
Custom class loader to reload functions on demand
@roadmap_1088_li
Close all files when closing the database (including LOB files that are open on the client side)
Test http://mysql-je.sourceforge.net/
@roadmap_1089_li
EXE file: maybe use http://jsmooth.sourceforge.net
Close all files when closing the database (including LOB files that are open on the client side)
@roadmap_1090_li
Performance: Automatically build in-memory indexes if the whole table is in memory
EXE file: maybe use http://jsmooth.sourceforge.net
@roadmap_1091_li
H2 Console: The webclient could support more features like phpMyAdmin.
Performance: Automatically build in-memory indexes if the whole table is in memory
@roadmap_1092_li
Use Janino to convert Java to C++
H2 Console: The webclient could support more features like phpMyAdmin.
@roadmap_1093_li
The HELP information schema can be directly exposed in the Console
Use Janino to convert Java to C++
@roadmap_1094_li
Maybe use the 0x1234 notation for binary fields, see MS SQL Server
The HELP information schema can be directly exposed in the Console
@roadmap_1095_li
Support Oracle CONNECT BY in some way: http://www.adp-gmbh.ch/ora/sql/connect_by.html, http://philip.greenspun.com/sql/trees.html
Maybe use the 0x1234 notation for binary fields, see MS SQL Server
@roadmap_1096_li
SQL Server 2005, Oracle: Support COUNT(*) OVER(). See http://www.orafusion.com/art_anlytc.htm
Support Oracle CONNECT BY in some way: http://www.adp-gmbh.ch/ora/sql/connect_by.html, http://philip.greenspun.com/sql/trees.html
@roadmap_1097_li
RANK() and DENSE_RANK(), Partition using OVER()
SQL Server 2005, Oracle: Support COUNT(*) OVER(). See http://www.orafusion.com/art_anlytc.htm
Optimize getGeneratedKey: send last identity after each execute (server).
Version column (number/sequence and timestamp based)
@roadmap_1101_li
Test and document UPDATE TEST SET (ID, NAME) = (SELECT ID*10, NAME || '!' FROM TEST T WHERE T.ID=TEST.ID);
Optimize getGeneratedKey: send last identity after each execute (server).
@roadmap_1102_li
Max memory rows / max undo log size: use block count / row size not row count
Test and document UPDATE TEST SET (ID, NAME) = (SELECT ID*10, NAME || '!' FROM TEST T WHERE T.ID=TEST.ID);
@roadmap_1103_li
Support 123L syntax as in Java; example: SELECT (2000000000*2)
Max memory rows / max undo log size: use block count / row size not row count
@roadmap_1104_li
Implement point-in-time recovery
Support 123L syntax as in Java; example: SELECT (2000000000*2)
@roadmap_1105_li
LIKE: improved version for larger texts (currently using naive search)
Implement point-in-time recovery
@roadmap_1106_li
Automatically convert to the next 'higher' data type whenever there is an overflow.
LIKE: improved version for larger texts (currently using naive search)
@roadmap_1107_li
Throw an exception when the application calls getInt on a Long (optional)
Automatically convert to the next 'higher' data type whenever there is an overflow.
@roadmap_1108_li
Default date format for input and output (local date constants)
Throw an exception when the application calls getInt on a Long (optional)
@roadmap_1109_li
Support custom Collators
Default date format for input and output (local date constants)
@roadmap_1110_li
Document ROWNUM usage for reports: SELECT ROWNUM, * FROM (subquery)
Support custom Collators
@roadmap_1111_li
Clustering: Reads should be randomly distributed or to a designated database on RAM
Document ROWNUM usage for reports: SELECT ROWNUM, * FROM (subquery)
@roadmap_1112_li
Clustering: When a database is back alive, automatically synchronize with the master
Clustering: Reads should be randomly distributed or to a designated database on RAM
@roadmap_1113_li
Standalone tool to get relevant system properties and add it to the trace output.
Clustering: When a database is back alive, automatically synchronize with the master
@roadmap_1114_li
Support 'call proc(1=value)' (PostgreSQL, Oracle)
Standalone tool to get relevant system properties and add it to the trace output.
@roadmap_1115_li
JAMon (proxy jdbc driver)
Support 'call proc(1=value)' (PostgreSQL, Oracle)
@roadmap_1116_li
Console: Improve editing data (Tab, Shift-Tab, Enter, Up, Down, Shift+Del?)
JAMon (proxy jdbc driver)
@roadmap_1117_li
Console: Autocomplete Ctrl+Space inserts template
Console: Improve editing data (Tab, Shift-Tab, Enter, Up, Down, Shift+Del?)
@roadmap_1118_li
Simplify translation ('Donate a translation')
Console: Autocomplete Ctrl+Space inserts template
@roadmap_1119_li
Option to encrypt .trace.db file
Simplify translation ('Donate a translation')
@roadmap_1120_li
Write Behind Cache on SATA leads to data corruption See also http://sr5tech.com/write_back_cache_experiments.htm and http://www.jasonbrome.com/blog/archives/2004/04/03/writecache_enabled.html
Option to encrypt .trace.db file
@roadmap_1121_li
Functions with unknown return or parameter data types: serialize / deserialize
Write Behind Cache on SATA leads to data corruption See also http://sr5tech.com/write_back_cache_experiments.htm and http://www.jasonbrome.com/blog/archives/2004/04/03/writecache_enabled.html
@roadmap_1122_li
Test if idle TCP connections are closed, and how to disable that
Functions with unknown return or parameter data types: serialize / deserialize
@roadmap_1123_li
Try using a factory for Row, Value[] (faster?), http://javolution.org/, alternative ObjectArray / IntArray
Test if idle TCP connections are closed, and how to disable that
@roadmap_1124_li
Auto-Update feature for database, .jar file
Try using a factory for Row, Value[] (faster?), http://javolution.org/, alternative ObjectArray / IntArray
@roadmap_1125_li
ResultSet SimpleResultSet.readFromURL(String url): id varchar, state varchar, released timestamp
Auto-Update feature for database, .jar file
@roadmap_1126_li
ROW_NUMBER (not the same as ROWNUM)
ResultSet SimpleResultSet.readFromURL(String url): id varchar, state varchar, released timestamp
@roadmap_1127_li
Partial indexing (see PostgreSQL)
ROW_NUMBER (not the same as ROWNUM)
@roadmap_1128_li
The build should fail if the test fails
Partial indexing (see PostgreSQL)
@roadmap_1129_li
Add GUI to build a custom version (embedded, fulltext,...) using build flags
The build should fail if the test fails
@roadmap_1130_li
http://rubyforge.org/projects/hypersonic/
Add GUI to build a custom version (embedded, fulltext,...) using build flags
@roadmap_1131_li
Add comparator (x === y) : (x = y or (x is null and y is null))
http://rubyforge.org/projects/hypersonic/
@roadmap_1132_li
Try to create trace file even for read only databases
Add comparator (x === y) : (x = y or (x is null and y is null))
@roadmap_1133_li
Add a sample application that runs the H2 unit test and writes the result to a file (so it can be included in the user app)
Try to create trace file even for read only databases
@roadmap_1134_li
Count on a column that can not be null could be optimized to COUNT(*)
Add a sample application that runs the H2 unit test and writes the result to a file (so it can be included in the user app)
@roadmap_1135_li
Table order: ALTER TABLE TEST ORDER BY NAME DESC (MySQL compatibility)
Count on a column that can not be null could be optimized to COUNT(*)
@roadmap_1136_li
Backup tool should work with other databases as well
Table order: ALTER TABLE TEST ORDER BY NAME DESC (MySQL compatibility)
@roadmap_1137_li
Console: -ifExists doesn't work for the console. Add a flag to disable other dbs
Backup tool should work with other databases as well
@roadmap_1138_li
Performance: Update in-place
Console: -ifExists doesn't work for the console. Add a flag to disable other dbs
@roadmap_1139_li
Check if 'FSUTIL behavior set disablelastaccess 1' improves the performance (fsutil behavior query disablelastaccess)
Implement Clob / Blob truncate and the remaining functionality
Compatibility for CREATE SCHEMA AUTHORIZATION
@roadmap_1144_li
Maybe close LOBs after closing connection
Implement Clob / Blob truncate and the remaining functionality
@roadmap_1145_li
Tree join functionality
Maybe close LOBs after closing connection
@roadmap_1146_li
Support alter table add column if table has views defined
Tree join functionality
@roadmap_1147_li
Add multiple columns at the same time with ALTER TABLE .. ADD .. ADD ..
Support alter table add column if table has views defined
@roadmap_1148_li
Add H2 to Gem (Ruby install system)
Add multiple columns at the same time with ALTER TABLE .. ADD .. ADD ..
@roadmap_1149_li
API for functions / user tables
Add H2 to Gem (Ruby install system)
@roadmap_1150_li
Order conditions inside AND / OR to optimize the performance
API for functions / user tables
@roadmap_1151_li
Support linked JCR tables
Order conditions inside AND / OR to optimize the performance
@roadmap_1152_li
Make sure H2 is supported by Execute Query: http://executequery.org/
Support linked JCR tables
@roadmap_1153_li
Read InputStream when executing, as late as possible (maybe only embedded mode). Problem with re-execute.
Make sure H2 is supported by Execute Query: http://executequery.org/
@roadmap_1154_li
Native fulltext search: min word length; store word positions
Read InputStream when executing, as late as possible (maybe only embedded mode). Problem with re-execute.
@roadmap_1155_li
FTP Server: Implement a client to send / receive files to server (dir, get, put)
Native fulltext search: min word length; store word positions
@roadmap_1156_li
FTP Server: Implement SFTP / FTPS
FTP Server: Implement a client to send / receive files to server (dir, get, put)
@roadmap_1157_li
Add an option to the SCRIPT command to generate only portable / standard SQL
FTP Server: Implement SFTP / FTPS
@roadmap_1158_li
Test Dezign for Databases (http://www.datanamic.com)
Add an option to the SCRIPT command to generate only portable / standard SQL
@roadmap_1159_li
Fast library for parsing / formatting: http://javolution.org/
Test Dezign for Databases (http://www.datanamic.com)
@roadmap_1160_li
Updatable Views (simple cases first)
Fast library for parsing / formatting: http://javolution.org/
@roadmap_1161_li
Improve create index performance
Updatable Views (simple cases first)
@roadmap_1162_li
Implement more JDBC 4.0 features
Improve create index performance
@roadmap_1163_li
Support TRANSFORM / PIVOT as in MS Access
Implement more JDBC 4.0 features
@roadmap_1164_li
SELECT * FROM (VALUES (...), (...), ....) AS alias(f1, ...)
Support TRANSFORM / PIVOT as in MS Access
@roadmap_1165_li
Support updatable views with join on primary keys (to extend a table)
SELECT * FROM (VALUES (...), (...), ....) AS alias(f1, ...)
@roadmap_1166_li
Public interface for functions (not public static)
Support updatable views with join on primary keys (to extend a table)
@roadmap_1167_li
Autocomplete: if I type the name of a table that does not exist (should say: syntax not supported)
Public interface for functions (not public static)
@roadmap_1168_li
Document FTP server, including -ftpTask option to execute / kill remote processes
Autocomplete: if I type the name of a table that does not exist (should say: syntax not supported)
@roadmap_1169_li
Eliminate undo log records if stored on disk (just one pointer per block, not per record)
Document FTP server, including -ftpTask option to execute / kill remote processes
@roadmap_1170_li
Feature matrix like in <a href="http://www.inetsoftware.de/products/jdbc/mssql/features/default.asp">i-net software</a> .
Eliminate undo log records if stored on disk (just one pointer per block, not per record)
@roadmap_1171_li
Updatable result set on table without primary key or unique index
Feature matrix like in <a href="http://www.inetsoftware.de/products/jdbc/mssql/features/default.asp">i-net software</a> .
@roadmap_1172_li
Use LinkedList instead of ArrayList where applicable
Updatable result set on table without primary key or unique index
@roadmap_1173_li
Support % operator (modulo)
Use LinkedList instead of ArrayList where applicable
@roadmap_1174_li
Support 1+'2'=3, '1'+'2'='12' (MS SQL Server compatibility)
Support % operator (modulo)
@roadmap_1175_li
Support nested transactions
Support 1+'2'=3, '1'+'2'='12' (MS SQL Server compatibility)
@roadmap_1176_li
Add a benchmark for big databases, and one for many users
Support nested transactions
@roadmap_1177_li
Compression in the result set (repeating values in the same column) over TCP/IP
Add a benchmark for big databases, and one for many users
@roadmap_1178_li
Support curtimestamp (like curtime, curdate)
Compression in the result set (repeating values in the same column) over TCP/IP
@roadmap_1179_li
Support ANALYZE {TABLE|INDEX} tableName COMPUTE|ESTIMATE|DELETE STATISTICS ptnOption options
Support curtimestamp (like curtime, curdate)
@roadmap_1180_li
Support Sequoia (Continuent.org)
Support ANALYZE {TABLE|INDEX} tableName COMPUTE|ESTIMATE|DELETE STATISTICS ptnOption options
@roadmap_1181_li
Dynamic length numbers / special methods for DataPage.writeByte / writeShort / Ronni Nielsen
Support Sequoia (Continuent.org)
@roadmap_1182_li
Pluggable ThreadPool, (AvalonDB / deebee / Paul Hammant)
Dynamic length numbers / special methods for DataPage.writeByte / writeShort / Ronni Nielsen
@roadmap_1183_li
Recursive Queries (see details)
Pluggable ThreadPool, (AvalonDB / deebee / Paul Hammant)
@roadmap_1184_li
Release locks (shared or exclusive) on demand
Recursive Queries (see details)
@roadmap_1185_li
Support OUTER UNION
Release locks (shared or exclusive) on demand
@roadmap_1186_li
Support parameterized views (similar to CSVREAD, but using just SQL for the definition)
Support OUTER UNION
@roadmap_1187_li
A way (JDBC driver) to map an URL (jdbc:h2map:c1) to a connection object
Support parameterized views (similar to CSVREAD, but using just SQL for the definition)
@roadmap_1188_li
Option for SCRIPT to only process one or a set of tables, and append to a file
A way (JDBC driver) to map an URL (jdbc:h2map:c1) to a connection object
@roadmap_1189_li
Support using a unique index for IS NULL (including linked tables)
Option for SCRIPT to only process one or a set of tables, and append to a file
@roadmap_1190_li
Support linked tables to the current database
Support using a unique index for IS NULL (including linked tables)
@roadmap_1191_li
Support dynamic linked schema (automatically adding/updating/removing tables)
Support linked tables to the current database
@roadmap_1192_li
Compatibility with Derby: VALUES(1), (2); SELECT * FROM (VALUES (1), (2)) AS myTable(c1)
Support dynamic linked schema (automatically adding/updating/removing tables)
@roadmap_1193_li
Compatibility: # is the start of a single line comment (MySQL) but date quote (Access). Mode specific
Compatibility with Derby: VALUES(1), (2); SELECT * FROM (VALUES (1), (2)) AS myTable(c1)
@roadmap_1194_li
Run benchmarks with JDK 1.5, JDK 1.6, java -server
Compatibility: # is the start of a single line comment (MySQL) but date quote (Access). Mode specific
@roadmap_1195_li
Optimizations: Faster hash function for strings, byte arrays
Run benchmarks with JDK 1.5, JDK 1.6, java -server
@roadmap_1196_li
DatabaseEventListener: callback for all operations (including expected time, RUNSCRIPT) and cancel functionality
Optimizations: Faster hash function for strings, byte arrays
@roadmap_1197_li
H2 Console / large result sets: use 'streaming' instead of building the page in-memory
DatabaseEventListener: callback for all operations (including expected time, RUNSCRIPT) and cancel functionality
@roadmap_1198_li
Benchmark: add a graph to show how databases scale (performance/database size)
H2 Console / large result sets: use 'streaming' instead of building the page in-memory
@roadmap_1199_li
Implement a SQLData interface to map your data over to a custom object
Benchmark: add a graph to show how databases scale (performance/database size)
@roadmap_1200_li
In the MySQL and PostgreSQL mode, use lower case identifiers by default (DatabaseMetaData.storesLowerCaseIdentifiers = true)
Implement a SQLData interface to map your data over to a custom object
@roadmap_1201_li
Make DDL (Data Definition) operations transactional
In the MySQL and PostgreSQL mode, use lower case identifiers by default (DatabaseMetaData.storesLowerCaseIdentifiers = true)
@roadmap_1202_li
Allow execution time prepare for SELECT * FROM CSVREAD(?, 'columnNameString')
Make DDL (Data Definition) operations transactional
@roadmap_1203_li
Support multiple directories (on different hard drives) for the same database
Allow execution time prepare for SELECT * FROM CSVREAD(?, 'columnNameString')
@roadmap_1204_li
Server protocol: use challenge response authentication, but client sends hash(user+password) encrypted with response
Support multiple directories (on different hard drives) for the same database
@roadmap_1205_li
Support EXEC[UTE] (doesn't return a result set, compatible to MS SQL Server)
Server protocol: use challenge response authentication, but client sends hash(user+password) encrypted with response
@roadmap_1206_li
Support native XML data type
Support EXEC[UTE] (doesn't return a result set, compatible to MS SQL Server)
@roadmap_1207_li
Support triggers with a string property or option: SpringTrigger, OSGITrigger
Support native XML data type
@roadmap_1208_li
Clustering: adding a node should be very fast and without interrupting clients (very short lock)
Support triggers with a string property or option: SpringTrigger, OSGITrigger
@roadmap_1209_li
Support materialized views (using triggers)
Clustering: adding a node should be very fast and without interrupting clients (very short lock)
@roadmap_1210_li
Store dates in local time zone (portability of database files)
Support materialized views (using triggers)
@roadmap_1211_li
Ability to resize the cache array when resizing the cache
Store dates in local time zone (portability of database files)
@roadmap_1212_li
Time based cache writing (one second after writing the log)
Ability to resize the cache array when resizing the cache
@roadmap_1213_li
Check state of H2 driver for DDLUtils: https://issues.apache.org/jira/browse/DDLUTILS-185
Time based cache writing (one second after writing the log)
@roadmap_1214_li
Index usage for REGEXP LIKE.
Check state of H2 driver for DDLUtils: https://issues.apache.org/jira/browse/DDLUTILS-185
@roadmap_1215_li
Compatibility: add a role DBA (like ADMIN).
Index usage for REGEXP LIKE.
@roadmap_1216_li
Better support multiple processors for in-memory databases.
Compatibility: add a role DBA (like ADMIN).
@roadmap_1217_li
Access rights: remember the owner of an object. COMMENT: allow owner of object to change it.
Better support multiple processors for in-memory databases.
@roadmap_1218_li
Access rights: Finer grained access control (grant access for specific functions)
Access rights: remember the owner of an object. COMMENT: allow owner of object to change it.
@roadmap_1219_li
Support N'text'
Access rights: Finer grained access control (grant access for specific functions)
@roadmap_1220_li
Support SCOPE_IDENTITY() to avoid problems when inserting rows in a trigger
Support N'text'
@roadmap_1221_li
Set a connection read only (Connection.setReadOnly)
Support SCOPE_IDENTITY() to avoid problems when inserting rows in a trigger
@roadmap_1222_li
In MySQL mode, for AUTO_INCREMENT columns, don't set the primary key
Set a connection read only (Connection.setReadOnly)
@roadmap_1223_li
Use JDK 1.4 file locking to create the lock file (but not yet by default); writing a system property to detect concurrent access from the same VM (different classloaders).
In MySQL mode, for AUTO_INCREMENT columns, don't set the primary key
@roadmap_1224_li
Support compatibility for jdbc:hsqldb:res:
Use JDK 1.4 file locking to create the lock file (but not yet by default); writing a system property to detect concurrent access from the same VM (different classloaders).
@roadmap_1225_li
Provide an Java SQL builder with standard and H2 syntax
Support compatibility for jdbc:hsqldb:res:
@roadmap_1226_li
Trace: write OS, file system, JVM,... when opening the database
Provide an Java SQL builder with standard and H2 syntax
@roadmap_1227_li
Support indexes for views (probably requires materialized views)
Trace: write OS, file system, JVM,... when opening the database
@roadmap_1228_li
Document SET SEARCH_PATH, BEGIN, EXECUTE, parameters
Support indexes for views (probably requires materialized views)
@roadmap_1229_li
Browser: use Desktop.isDesktopSupported and browse when using JDK 1.6
Document SET SEARCH_PATH, BEGIN, EXECUTE, parameters
@roadmap_1230_li
Server: use one listener (detect if the request comes from an PG or TCP client)
Browser: use Desktop.isDesktopSupported and browse when using JDK 1.6
@roadmap_1231_li
Store dates as 'local'. Existing files use GMT. Use escape syntax for compatibility.
Server: use one listener (detect if the request comes from an PG or TCP client)
@roadmap_1232_li
Support data type INTERVAL
Store dates as 'local'. Existing files use GMT. Use escape syntax for compatibility.
@roadmap_1233_li
Optimize SELECT MIN(ID), MAX(ID), COUNT(*) FROM TEST WHERE ID BETWEEN 100 AND 200
Support data type INTERVAL
@roadmap_1234_li
Support Oracle functions: TRUNC, NVL2, TO_CHAR, TO_DATE, TO_NUMBER
Optimize SELECT MIN(ID), MAX(ID), COUNT(*) FROM TEST WHERE ID BETWEEN 100 AND 200
#The MERGE statement now returns 0 as the generated key if the row was updated.
@changelog_1003_li
#Running code coverage is now automated.
@changelog_1004_li
#A file system implementation can now be registered using FileSystem.register. The database file system is no longer included in the jar file, it moved to the test section.
@changelog_1003_h2
@changelog_1005_h2
#Version 1.1.111 (2009-04-10)
@changelog_1004_li
@changelog_1006_li
#In-memory databases can now run inside the Google App Engine.
@changelog_1005_li
@changelog_1007_li
#Queries that are ordered by an indexed column returned no rows in certain cases (if all rows were deleted from the table previously, and there is a low number of rows in the table, and when not using other conditions, and when using the default b tree index).
@changelog_1006_li
@changelog_1008_li
#The wrong exception was thrown when using unquoted text for the SQL statements COMMENT, ALTER USER, and SET PASSWORD.
@changelog_1007_li
@changelog_1009_li
#The built-in connection pool did not roll back transactions and enable autocommit enabled after closing a connection.
@changelog_1008_li
@changelog_1010_li
#Sometimes a StackOverflow occurred when checking for deadlock. See also http://code.google.com/p/h2database/issues/detail?id=61
@changelog_1009_li
@changelog_1011_li
#The Shell tool no longer truncates results with only one column, and displays a message if data was truncated.
@changelog_1010_h2
@changelog_1012_h2
#Version 1.1.110 (2009-04-03)
@changelog_1011_li
@changelog_1013_li
#Support for not persistent in-memory tables in regular (persistent) databases using CREATE MEMORY TABLE(..) NOT PERSISTENT. Thanks a lot to Sergi Vladykin for the patch!
@changelog_1012_li
@changelog_1014_li
#The H2 Console trimmed the password (removed leading and trailing spaces). This is no longer the case, to support encrypted H2 database with an empty user password.
@changelog_1013_li
@changelog_1015_li
#The data type of a SUBSTRING method was wrong.
@changelog_1014_li
@changelog_1016_li
#ResultSet.findColumn and get methods with column label parameters now also check for matching column names (like most databases except MySQL).
@changelog_1015_li
@changelog_1017_li
#H2 Console: the browser system property now supports a list of arguments. Example: java -Dh2.browser="open,-a,Safari,%url" ...
@changelog_1016_li
@changelog_1018_li
#Improved Javadoc navigation (similar to Scaladoc).
@changelog_1017_li
@changelog_1019_li
#H2 Console: auto-complete of identifiers did not work correctly for H2 databases in MySQL mode.
@changelog_1018_li
@changelog_1020_li
#DISTINCT and GROUP BY on a CLOB column was broken.
@changelog_1019_li
@changelog_1021_li
#The FTP server moved to the tools section and is no longer included in the h2*.jar file.
@changelog_1020_li
@changelog_1022_li
#Improved error message for unsupported features: now the message says what exactly is not supported.
@changelog_1021_li
@changelog_1023_li
#Improved OSGi support.
@changelog_1022_li
@changelog_1024_li
#Some internal caches did not use the LRU mechanism. Fixed (LOB file list, optimizer cost cache, trace system, view indexes, collection keys, compressed in-memory file system).
@changelog_1023_li
@changelog_1025_li
#The API of the tools changed a bit (each tool now returns an exit code).
@changelog_1024_li
@changelog_1026_li
#Command line help of the tools now match the javadocs. The build converts the javadocs to a resource that is read by the tool at runtime. This should not have an effect on using the database, but it reduces duplicate and out-of-sync documentation.
@changelog_1025_li
@changelog_1027_li
#CREATE TABLE: improved compatibility (support for UNIQUE NOT NULL).
@changelog_1026_li
@changelog_1028_li
#DatabaseMetaData.getSQLKeywords now returns the correct list.
@changelog_1027_li
@changelog_1029_li
#Deterministic user defined functions did not work when the parameter was a column. Fixed.
@changelog_1028_li
@changelog_1030_li
#JdbcConnectionPool.setLoginTimeout with 0 now uses the default timeout.
@changelog_1029_li
@changelog_1031_li
#Creating a JdbcConnectionPool has been simplified a bit.
@changelog_1030_li
@changelog_1032_li
#The built-in connection pool did not re-use connections. Getting a connection using the built-in JdbcConnectionPool is now about 70 times faster than opening connections using DriverManager.getConnection.
@changelog_1031_li
@changelog_1033_li
#More bugs in the server-less multi-connection mode have been fixed: If a process terminated while writing, other open connections were blocked. If two processes were writing to the database, sometimes the database was corrupt after closing.
@changelog_1032_li
@changelog_1034_li
#Linked tables to SQLite database can now be created.
@changelog_1033_li
@changelog_1035_li
#Nested IN(IN(...)) didn't work.
@changelog_1034_li
@changelog_1036_li
#NIO storage: the nio: prefix was using memory mapped files instead of FileChannel.
@changelog_1035_h2
@changelog_1037_h2
#Version 1.1.109 (2009-03-14)
@changelog_1036_li
@changelog_1038_li
#The optimization for IN(...) is now only used if comparing a column with an index.
@changelog_1037_li
@changelog_1039_li
#User defined functions can now be deterministic (see CREATE ALIAS documentation).
@changelog_1038_li
@changelog_1040_li
#Multiple nested queries in the FROM clause with parameters did not always work.
@changelog_1039_li
@changelog_1041_li
#When converting CLOB to BINARY, each character resulted in one byte. Now, the text is parsed as a hex as when converting VARCHAR.
@changelog_1040_li
@changelog_1042_li
#New experimental NIO storage mechanism with both FileChannel and memory mapped files. To use it, use the file name prefix nio: or nioMapped: as in jdbc:h2:nio:~/test. So far it looks like NIO storage is faster on Mac OS but slower on some Windows systems. Thanks a lot to Jan Kotek for the patch!
@changelog_1041_li
@changelog_1043_li
#The functions BITOR, BITAND, BITXOR, and MOD now accept and return BIGINT instead of INT.
@changelog_1042_li
@changelog_1044_li
#Could not use the same linked table multiple times in the same query.
@changelog_1043_li
@changelog_1045_li
#Bugs in the server-less multi-connection mode have been fixed.
@changelog_1044_li
@changelog_1046_li
#Column names could not be named "UNIQUE" (with the quotes).
@changelog_1045_li
@changelog_1047_li
#New system function TRANSACTION_ID() to get the current transaction identifier for a session.
@changelog_1046_h2
@changelog_1048_h2
#Version 1.1.108 (2009-02-28)
@changelog_1047_li
@changelog_1049_li
#When the shutdown hook closed the database, the last log file was deleted too early. This could cause uncommitted changes to be persisted.
@changelog_1048_li
@changelog_1050_li
#JdbcConnectionPool: it was possible to set a negative connection pool size.
@changelog_1049_li
@changelog_1051_li
#Fulltext search did not support table names with a backslash.
@changelog_1050_li
@changelog_1052_li
#The internal IntArray class did not work correctly when initialized with a zero length array.
@changelog_1051_li
@changelog_1053_li
#The H2 Console web application (war file) did only support ASCII characters. Now UTF-8 is supported.
@changelog_1052_li
@changelog_1054_li
#DATEADD does no longer require that the argument is a timestamp.
@changelog_1053_li
@changelog_1055_li
#The database file locking mechanism didn't work correctly on Mac OS.
@changelog_1054_li
@changelog_1056_li
#Some built-in functions reported the wrong precision, scale, and display size.
@changelog_1055_li
@changelog_1057_li
#MySQL compatibility for CREATE TABLE is improved (UNSIGNED, KEY).
@changelog_1056_li
@changelog_1058_li
#Recovery did not work if there were more than 255 lobs stored as files.
@changelog_1057_li
@changelog_1059_li
#New experimental mode to support multiple read-write connections without starting a server. To enable this mode, append ;FILE_LOCK=SERIALIZED;OPEN_NEW=TRUE to the database URL. Don't expect high performance when multiple concurrent writers.
@changelog_1058_li
@changelog_1060_li
#In a web application, the database classes are not unloaded if a connection is open. This may cause out of memory when re-deploying a web application. The DbStarter is changed to close all connections to the configured database (by executing SHUTDOWN).
@changelog_1059_li
@changelog_1061_li
#The WebServlet did not close the database when un-deploying the web application.
@changelog_1060_li
@changelog_1062_li
#The exception message of failed INSERT or MERGE statements now includes all values and the row number.
@changelog_1061_li
@changelog_1063_li
#If opening a database failed with an out of memory exception, some files were not closed.
@changelog_1062_li
@changelog_1064_li
#Optimizer: the expected runtime calculation was incorrect. The fixed calculation should give slightly better query plans when using many joins.
@changelog_1063_li
@changelog_1065_li
#Improved exception message when connecting to a just started server fails.
@changelog_1064_li
@changelog_1066_li
#Connection.isValid is a bit faster.
@changelog_1065_li
@changelog_1067_li
#H2 Console: The autocomplete feature has been improved a bit. It can now better parse conditions.
@changelog_1066_li
@changelog_1068_li
#When restarting a web application in Tomcat, an exception was thrown sometimes. In most cases this was a NullPointerException. A workaround in H2 has been implemented. The root cause of the problem is now documented in the FAQ: Tomcat sets all static fields (final or non-final) to null when unloading a web application. A workaround is to put the h2.jar in the lib directory, or set the system property org.apache.catalina.loader.WebappClassLoader.ENABLE_CLEAR_REFERENCES to false.
@changelog_1067_h2
@changelog_1069_h2
#Version 1.1.107 (2009-01-24)
@changelog_1068_li
@changelog_1070_li
#Some DatabaseMetaData operations did not work for non-admin users for versions 1.1.x.
@changelog_1069_li
@changelog_1071_li
#The MySQL compatibility extension fromUnixTime now used the English locale.
@changelog_1070_li
@changelog_1072_li
#When using LOG=2 and repeatedly updating the last row rows of a table, the index file grew quickly.
@changelog_1071_li
@changelog_1073_li
#In versions 1.1.105 and 1.1.106, encrypted script files of earlier versions could not be processed. This is now again possible. The problem was that such script files were stored in a special format (STORAGE=TEXT) but support for this format was removed in version 1.1.105.
@changelog_1072_li
@changelog_1074_li
#Enabling the trace mechanism by creating a specially named file is no longer supported.
@changelog_1073_h2
@changelog_1075_h2
#Version 1.1.106 (2009-01-04)
@changelog_1074_li
@changelog_1076_li
#Statement.setQueryTimeout did not work correctly for some statements.
@changelog_1075_li
@changelog_1077_li
#CREATE DOMAIN: Built-in data types can now only be changed if no tables exist.
@changelog_1076_li
@changelog_1078_li
#Linked tables: a workaround for Oracle DATE columns has been implemented.
@changelog_1077_li
@changelog_1079_li
#DatabaseMetaData.getPrimaryKeys: The column PK_NAME now contains the constraint name instead of the index name (compatibility for PostgreSQL and Derby).
@changelog_1078_li
@changelog_1080_li
#Using IN(..) inside a IN(SELECT..) did not always work.
@changelog_1079_li
@changelog_1081_li
#Views with IN(..) that used a view itself did not work.
@changelog_1080_li
@changelog_1082_li
#Union queries with LIMIT or ORDER BY that are used in a view or subquery did not work.
@changelog_1081_li
@changelog_1083_li
#The license change a bit: so far the license was modified to say 'Swiss law'. This is now changed back to the original 'US law'. This was requested by a user, and I don't see a problem.
@changelog_1082_li
@changelog_1084_li
#Constraints for local temporary tables now session scoped. So far they were global. Thanks a lot to Eric Faulhaber for finding and fixing this problem!
@changelog_1083_li
@changelog_1085_li
#When using the auto-server mode, and if the lock file was modified in the future, the wrong exception was thrown ('Connection is broken' instead of 'Error opening database: Lock file modified in the future').
@changelog_1084_h2
@changelog_1086_h2
#Version 1.1.105 (2008-12-19)
@changelog_1085_li
@changelog_1087_li
#The setting STORAGE=TEXT is no longer supported.
@changelog_1086_li
@changelog_1088_li
#Deleting a database using the tool DeleteDbFiles deleted LOB files of other databases in the same directory.
@changelog_1087_li
@changelog_1089_li
#When used in a subquery, LIKE and IN(..) did not work correctly sometimes.
@changelog_1088_li
@changelog_1090_li
#The fulltext search documentation has been improved.
@changelog_1089_li
@changelog_1091_li
#ARRAY_GET returned the wrong data type (ARRAY). Now it returns VARCHAR.
@changelog_1090_li
@changelog_1092_li
#Natural join: the joined columns are not repeated any more when using SELECT *.
@changelog_1091_li
@changelog_1093_li
#User defined aggregate functions: the method getType expected internal data types instead of SQL types.
@changelog_1092_li
@changelog_1094_li
#User defined aggregate functions did not work if there was no group by expression.
@changelog_1093_li
@changelog_1095_li
#MySQL compatibility: support for := assignment as in @sum:=@sum+x
@changelog_1094_li
@changelog_1096_li
#INSERT INTO TEST(SELECT * FROM TEST) is now supported.
@changelog_1095_li
@changelog_1097_li
#Each session threw an invisible exception when garbage collected.
@changelog_1096_li
@changelog_1098_li
#Foreign key constraints that refer to a quoted column did not work.
@changelog_1097_li
@changelog_1099_li
#New meta data column INFORMATION_SCHEMA.TABLES.LAST_MODIFICATION to get the table modification counter.
@changelog_1098_li
@changelog_1100_li
#Shell: line comments didn't work correctly.
@changelog_1099_li
@changelog_1101_li
#H2 Console: Columns are now listed for up to 500 tables instead of 100.
@changelog_1100_li
@changelog_1102_li
#H2 Console: Cmd+Enter executes the current statement, Alt+Space for autocomplete.
@changelog_1101_li
@changelog_1103_li
#JaQu: the maximum length of a column can now be defined using maxLength. For an example, see Product.java (maxLength(category, 255)).
@changelog_1102_li
@changelog_1104_li
#R&\#305;dvan A&\#287;ar has completed the Turkish translation of the H2 Console. Thanks a lot!
@changelog_1103_h2
@changelog_1105_h2
#Version 1.1.104 (2008-11-28)
@changelog_1104_li
@changelog_1106_li
#If a query that was used like a table contained group by and was ordered by an expression that is not in the column list, an exception was thrown.
@changelog_1105_li
@changelog_1107_li
#JaQu: tables are now auto-created when running a query.
@changelog_1106_li
@changelog_1108_li
#The optimizer had problems with function tables (for example CSVREAD and FTL_SEARCH). A new system property h2.estimatedFunctionTableRows (default 1000) defines how many rows can be expected in the table.
@changelog_1107_li
@changelog_1109_li
#The function SUM could overflow when using large values. It returns now a data type that is safe.
@changelog_1108_li
@changelog_1110_li
#The function AVG could overflow when using large values. Fixed.
@changelog_1109_li
@changelog_1111_li
#The emergency reserve file has been removed. It didn't provide an appropriate solution for the problem. It is still possible for an application to detect and deal with the low disk space problem (deleting temporary files for example) using DatabaseEventListener.diskSpaceIsLow, but this method is now always called with stillAvailable=0.
@changelog_1110_li
@changelog_1112_li
#Build: JAVA_HOME is now automatically detected on Mac OS X.
@changelog_1111_li
@changelog_1113_li
#Testing for local connections was very slow on some systems.
@changelog_1112_li
@changelog_1114_li
#The cache memory usage calculation is more conservative.
@changelog_1113_li
@changelog_1115_li
#Allocating space got slower and slower the larger the database.
@changelog_1114_li
@changelog_1116_li
#ALTER TABLE ALTER COLUMN could throw the wrong exception in the last version (Table not found).
@changelog_1115_li
@changelog_1117_li
#Updatable result sets: the key columns can now be updated.
@changelog_1116_li
@changelog_1118_li
#The H2DatabaseProvider for ActiveObjects is now included in the tools section.
@changelog_1117_li
@changelog_1119_li
#The H2Platform for Oracle Toplink Essential has been improved a bit.
@changelog_1118_li
@changelog_1120_li
#The Windows service to start H2 didn't work in version 1.1.
@changelog_1119_li
@changelog_1121_li
#File systems with a maximum file size (for example FAT) are now supported using the file prefix 'split:'. In this case the files are split in parts of 1 GB. Example URL: jdbc:h2:split:~/db/test. If you want to split into parts of 1 MB, use jdbc:h2:split:20:~/db/test (the part size is 1 << x, the default is 30 meaning 1 GB).
@changelog_1120_li
@changelog_1122_li
#The database now tries to detect if the classloader or virtual machine has almost shut down by checking if static final variables are set to null. This should help reduce exceptions when stopping the web application.
@changelog_1121_li
@changelog_1123_li
#Compatibility for MS SQL Server DATEDIFF(YYYY, .., ..)
@changelog_1122_li
@changelog_1124_li
#ResultSet.getObject for CLOB or BLOB will return a java.sql.Clob / java.sql.Blob object instead of a java.io.Reader / java.io.InputStream as in version 1.0. This behavior can be changed using the system property h2.returnLobObjects (true by default for version 1.1).
@changelog_1123_li
@changelog_1125_li
#The interface CloseListener has a new method 'remove' that is called when the trigger is dropped.
@changelog_1124_li
@changelog_1126_li
#Fulltext search: there was a memory leak when creating and dropping fulltext indexes in a loop.
@changelog_1125_h2
@changelog_1127_h2
#Version 1.1.103 (2008-11-07)
@changelog_1126_li
@changelog_1128_li
#Could not order by a formula when the formula was in the group by list but not in the select list.
@changelog_1127_li
@changelog_1129_li
#Date values that match the daylight saving time end were not allowed in times zones were the daylight saving time ends at midnight, for years larger than 2037. Example: timezone Brasilia, date 2042-10-12. This is a problem of Java, however a workaround is implemented in H2 that solves most problems (except the problems of java.util.Date itself).
@changelog_1128_li
@changelog_1130_li
#ALTER TABLE used a lot of memory when using multi-version concurrency.
@changelog_1129_li
@changelog_1131_li
#Referential integrity for in-memory databases didn't work in some cases in version 1.1.102.
@changelog_1130_li
@changelog_1132_li
#New column INFORMATION_SCHEMA.COLUMNS.SEQUENCE_NAME to get the name of the sequence for auto-increment columns.
@changelog_1131_li
@changelog_1133_li
#Aliases for built-in data types (such as MEDIUMBLOB which is an alias for BLOB) can now be re-mapped to another data type using CREATE DOMAIN. However main built-in data types (such as INTEGER) can not be re-mapped.
@changelog_1132_li
@changelog_1134_li
#The Japanese translation has been completed by Masahiro Ikemoto. Thanks a lot!
@changelog_1133_li
@changelog_1135_li
#Improved PostgreSQL compatibility for NEXTVAL and CURRVAL.
@changelog_1134_li
@changelog_1136_li
#Less heap memory is needed when multiple databases are open at the same time: The memory reserve (used to rollback after out of memory) is now global and no longer allocated for each database separately.
@changelog_1135_li
@changelog_1137_li
#New system property h2.browser to set the browser to use.
@changelog_1136_li
@changelog_1138_li
#To start the browser, java.awt.Desktop.browse is now used if available.
@changelog_1137_h2
@changelog_1139_h2
#Version 1.1.102 (2008-10-24)
@changelog_1138_li
@changelog_1140_li
#The French translation of the H2 Console has been improved by Olivier Parent. Thanks a lot!
@changelog_1139_li
@changelog_1141_li
#There was a memory leak when creating and dropping tables and indexes in a loop (persistent database only).
@changelog_1140_li
@changelog_1142_li
#SET LOG 2 was not effective if executed after opening the database.
@changelog_1141_li
@changelog_1143_li
#Translating the H2 Console is now simpler.
@changelog_1142_li
@changelog_1144_li
#Common exception (error code 23*) are no longer written to the .trace.db file by default.
@changelog_1143_li
@changelog_1145_li
#In-memory databases don't write LOBs to files any longer.
@changelog_1144_li
@changelog_1146_li
#Self referencing constraints didn't restrict deleting rows that reference itself if there is another row that references it.
@changelog_1145_li
@changelog_1147_li
#ResultSetMetaData.getColumnName now returns the alias name except for columns.
@changelog_1146_li
@changelog_1148_li
#Temporary files are now deleted when the database is closed, even if they were not garbage collected so far.
@changelog_1147_h2
@changelog_1149_h2
#Version 1.1.101 (2008-10-17)
@changelog_1148_li
@changelog_1150_li
#Errors with code 42000 - 42999 are no longer written to the trace file by default.
@changelog_1149_li
@changelog_1151_li
#Queries with more than 10 tables are now faster.
@changelog_1150_li
@changelog_1152_li
#Opening a connection with AUTO_SERVER=TRUE is now fast when the database is already open in another process (less than 0.01 seconds instead of 2 seconds).
@changelog_1151_li
@changelog_1153_li
#IF [NOT] EXISTS is supported for named constraints in ALTER TABLE ... ADD/DROP CONSTRAINT.
@changelog_1152_li
@changelog_1154_li
#The error messages have been translated to Spanish by Dario V. Fassi. Thanks a lot!
@changelog_1153_li
@changelog_1155_li
#Linked tables: the automatic connection sharing didn't work. Actually the system property h2.shareLinkedConnections was working in the opposite direction: it was disabled when set to true. Now it works as expected.
@changelog_1154_li
@changelog_1156_li
#Opening large database is now faster.
@changelog_1155_li
@changelog_1157_li
#New system property h2.socketConnectTimeout, the timeout in milliseconds to connect to a server. The default is 2000 (2 seconds).
@changelog_1156_li
@changelog_1158_li
#The wrong parameters were bound to subqueries with parameters, specially when using IN(SELECT ...) and IN(...).
@changelog_1157_li
@changelog_1159_li
#Unset parameters were not detected when the query was re-compiled.
@changelog_1158_li
@changelog_1160_li
#New functions ISO_YEAR, ISO_WEEK, ISO_DAY_OF_WEEK. Thanks a lot to Robert Rathsack for implementing those!
@changelog_1159_li
@changelog_1161_li
#The date functions DAYOFYEAR, DAYOFMONTH, DAYOFWEEK are now called DAY_OF_YEAR, DAY_OF_MONTH, DAY_OF_WEEK (the old names still work).
@changelog_1160_li
@changelog_1162_li
#An out of memory error while deleting or updating many rows could result in a strange exception.
@changelog_1161_li
@changelog_1163_li
#Linked tables: compatibility with MS SQL Server has been improved.
@changelog_1162_li
@changelog_1164_li
#Renaming tables that have foreign keys with cascade didn't work correctly.
@changelog_1163_li
@changelog_1165_li
#The auto-reconnect feature didn't work when using the auto-server mode. Fixed.
@changelog_1164_li
@changelog_1166_li
#Fulltext search: new method FT_DROP_INDEX.
@changelog_1165_li
@changelog_1167_li
#The optimization to group using an index didn't work in some cases in version 1.1 (see also system property h2.optimizeGroupSorted).
@changelog_1166_li
@changelog_1168_li
#OSGi meta data is included in the manifest file. An OSGi BundleActivator is included: it loads the database driver when starting the bundle, and unloads it when stopping the bundle.
@changelog_1167_li
@changelog_1169_li
#The default value for MAX_MEMORY_UNDO is now 50000.
@changelog_1168_li
@changelog_1170_li
#For alias columns, ResultSetMetaData.getTableName() and getColumnName() now return the real table and column name in the default mode.
@changelog_1169_li
@changelog_1171_li
#In SQL scripts created with SCRIPT TO, schemas are now only created if they don't exist yet.
@changelog_1170_li
@changelog_1172_li
#After re-connecting to a database, the database event listener (if set) is informed about it.
@changelog_1171_li
@changelog_1173_li
#Local temporary tables now support indexes. Thanks a lot to Matt Roy!
@changelog_1172_li
@changelog_1174_li
#RUNSCRIPT no longer uses a temporary file.
@changelog_1173_li
@changelog_1175_li
#New system table INFORMATION_SCHEMA.SESSION_STATE containing the SQL statements that make up the session state. The list currently contains variables (SET @..) and local temporary tables (without data).
@changelog_1174_li
@changelog_1176_li
#After an automatic re-connect, part of the session state stays (the part that is stored in the SESSION_STATE table).
@changelog_1175_li
@changelog_1177_li
#The build didn't work if the directory temp didn't exist before.
@changelog_1176_li
@changelog_1178_li
#New system property h2.maxReconnect (default 3) to limit the number of re-connects for the same SQL statement (this is usually only important for SHUTDOWN).
@changelog_1177_li
@changelog_1179_li
#WHERE .. IN (SELECT ...) could throw a NullPointerException.
@changelog_1178_li
@changelog_1180_li
#Improved Glassfish / Toplink support in H2Platform thanks to Marcio Borges from Brazil. Thanks a lot!
@changelog_1179_h2
@changelog_1181_h2
#Version 1.1.100 (2008-10-04)
@changelog_1180_li
@changelog_1182_li
#In version 1.1, the following system properties are now enabled by default: h2.lobFilesInDirectories, h2.optimizeGroupSorted, h2.optimizeInJoin, h2.shareLinkedConnections
@changelog_1181_li
@changelog_1183_li
#The H2 Console tool now works with the JDBC-ODBC bridge.
@changelog_1182_li
@changelog_1184_li
#The H2 Console tool now supports command line options to start things separately.
@changelog_1183_li
@changelog_1185_li
#Large objects did not work for in-memory databases in server mode in Linux.
@changelog_1184_li
@changelog_1186_li
#Connections from a local address other than 'localhost' were not allowed if remote connections were disabled. This was always a problem, but only got visible in the last release because the server no longer connects to 'localhost' if networked.
@changelog_1185_li
@changelog_1187_li
#The h2console.war can now be built using the Java build.
@changelog_1186_li
@changelog_1188_li
#By default, databases are shared in the same process. For read-only databases this causes unnecessary synchronization, but safes memory. If you want that each connection opens its own database, append ;OPEN_NEW=TRUE to the database URL.
@changelog_1187_li
@changelog_1189_li
#New auto-reconnect feature will cause the JDBC driver to reconnect to the database if the connection is lost. To enable, append ;AUTO_RECONNECT=TRUE to the database URL. This is specially helpful when using AUTO_SERVER. AUTO_SERVER automatically uses auto-reconnect.
@changelog_1188_li
@changelog_1190_li
#CreateCluster: the property 'serverlist' is now called 'serverList'.
@changelog_1189_li
@changelog_1191_li
#The ConvertTraceFile tool could not parse some files because the trace mechanism did not encode prepared statement parameters.
@changelog_1190_li
@changelog_1192_li
#Databases names can now be one character long (the minimum size used to be 2 characters).
@changelog_1191_h2
@changelog_1193_h2
#Version 1.0.79 (2008-09-26)
@changelog_1192_li
@changelog_1194_li
#Linked tables that point to the same database can now share the connection within the same database. Access to the same connection is serialized. To enable this feature, set the system property h2.shareLinkedConnections to true.
@changelog_1193_li
@changelog_1195_li
#Multiple processes can now access the same database without having to explicitly start the server. To do that, append ;AUTO_SERVER=TRUE to the database URL. In this case, the server is started automatically if the connection is in embedded mode, and the server mode is used if a server is running. If the process that opened the first connection is closed, the other client need to reconnect (there is no automatic re-connect so far). Remote connections are allowed, but only to this database.
@changelog_1194_li
@changelog_1196_li
#The server tool now displays the correct IP address if networked.
@changelog_1195_li
@changelog_1197_li
#Can now start a TCP server with port 0 (automatically select a port).
@changelog_1196_li
@changelog_1198_li
#Result sets with just a unique index can now be updated (previously a primary key was required).
@changelog_1197_li
@changelog_1199_li
#LINKED TABLE: the schema name can now be set. When multiple tables exist in different schema, and the schema name is not set, an exception is thrown.
@changelog_1198_li
@changelog_1200_li
#LINKED TABLE: worked around a bug in Oracle with the CHAR data type.
@changelog_1199_li
@changelog_1201_li
#Faster hash code calculation for large binary arrays.
@changelog_1200_li
@changelog_1202_li
#Faster storage re-use algorithm thanks to Greg Dhuse from cleversafe.com.
@changelog_1201_li
@changelog_1203_li
#The database supports the SHOW command for better MySQL and PostgreSQL compatibility.
@changelog_1202_li
@changelog_1204_li
#The H2 Console now abbreviates large texts in results.
@changelog_1203_li
@changelog_1205_li
#Multiple UNION queries could not be used in derived tables.
@changelog_1204_li
@changelog_1206_li
#Linked tables can now be read-only.
@changelog_1205_li
@changelog_1207_li
#Temporary linked tables are now supported.
@changelog_1206_li
@changelog_1208_li
#It was possible to create tables in read-only databases.
@changelog_1207_li
@changelog_1209_li
#SET SCHEMA_SEARCH_PATH is now documented.
@changelog_1208_li
@changelog_1210_li
#SET SCHEMA did not work for views.
@changelog_1209_li
@changelog_1211_li
#Row level locking for MVCC is now enabled. The exception 'Concurrent update in table ...' is still thrown, but only after the lock timeout.
@changelog_1210_li
@changelog_1212_li
#The maximum log file size setting was ignored for large databases.
@changelog_1211_li
@changelog_1213_li
#Multi-Version Concurrency (MVCC) may no longer be used when using the multi-threaded kernel feature (MULTI_THREADED). An exception is thrown when trying to connect with both settings. Additional synchronization is required before those features can be used together.
@changelog_1212_li
@changelog_1214_li
#The data type JAVA_OBJECT could not be used in updatable result sets.
@changelog_1213_li
@changelog_1215_li
#The system property h2.optimizeInJoin did not work correctly.
@changelog_1214_li
@changelog_1216_li
#Conditions such as ID=? AND ID>? were slow.
@changelog_1215_h2
@changelog_1217_h2
#Version 1.0.78 (2008-08-28)
@changelog_1216_li
@changelog_1218_li
#The documentation no longer uses a frameset (except the Javadocs).
@changelog_1217_li
@changelog_1219_li
#When using DB_CLOSE_DELAY, sometimes a NullPointerException is thrown when the database is opened almost at the same time as it is closed automatically. Thanks a lot to Dmitry Pekar for finding this!
@changelog_1218_li
@changelog_1220_li
#Java methods with variable number of parameters can now be used (for Java 1.5 or newer).
@changelog_1219_li
@changelog_1221_li
#The Japanese translation has been improved by Masahiro Ikemoto. Thanks a lot!
@changelog_1220_li
@changelog_1222_li
#The H2 Console replaced an empty user name with a single space.
@changelog_1221_li
@changelog_1223_li
#The build target 'build jarSmall' now includes the embedded database.
@changelog_1222_li
@changelog_1224_li
#JdbcDataSource now keeps the password in a char array where possible.
@changelog_1223_li
@changelog_1225_li
#ResultSet.absolute did not always work with large result sets.
@changelog_1224_li
@changelog_1226_li
#Column aliases can now be used in GROUP BY and HAVING.
@changelog_1225_li
@changelog_1227_li
#Jason Brittain has contributed MySQL date functions. Thanks a lot! They are not in the h2.jar file currently, but in src/tools/org/h2/mode/FunctionsMySQL.java. To install, add this class to the classpath and call FunctionsMySQL.register(conn) in the Java code.
@changelog_1226_h2
@changelog_1228_h2
#Version 1.0.77 (2008-08-16)
@changelog_1227_li
@changelog_1229_li
#JaQu is now using prepared statements and supports Date, Time, Timestamp.
@changelog_1228_li
@changelog_1230_li
#When using remote in-memory databases, large LOB objects did not work.
@changelog_1229_li
@changelog_1231_li
#Timestamp columns such as TIMESTAMP(6) were not compatible to other database.
@changelog_1230_li
@changelog_1232_li
#Opening a large database was slow if there was a problem opening the previous time.
@changelog_1231_li
@changelog_1233_li
#NOT IN(SELECT ...) was incorrect if the subquery returns no rows.
@changelog_1232_li
@changelog_1234_li
#CREATE TABLE AS SELECT did not work correctly in the multi-version concurrency mode.
@changelog_1233_li
@changelog_1235_li
#Support a comma before closing a list, as in: create table test(id int,)
@changelog_1234_li
@changelog_1236_li
#MySQL compatibility: linked tables had lower case column names on some systems.
@changelog_1235_li
@changelog_1237_li
#DB2 compatibility: the DB2 fetch-first-clause is supported.
@changelog_1236_li
@changelog_1238_li
#Oracle compatibility: old style outer join syntax using (+) did work correctly sometimes.
@changelog_1237_li
@changelog_1239_li
#ResultSet.setFetchSize is now supported.
@changelog_1238_li
@changelog_1240_li
#It has been reported that when using Install4j on some Linux systems and enabling the 'pack200' option, the h2.jar becomes corrupted by the install process, causing application failure. A workaround is to add an empty file h2.jar.nopack next to the h2.jar file. The reason for this problem is not known.
@changelog_1239_h2
@changelog_1241_h2
#Version 1.0.76 (2008-07-27)
@changelog_1240_li
@changelog_1242_li
#The comment of a domain (user defined data type) is now used as the default column comment when creating a column with this domain.
@changelog_1241_li
@changelog_1243_li
#Invalid database names are now detected and a better error message is thrown.
@changelog_1242_li
@changelog_1244_li
#ResultSetMetaData.getColumnClassName now returns the correct class name for BLOB and CLOB.
@changelog_1243_li
@changelog_1245_li
#Fixed the Oracle mode: Oracle allows multiple rows only where all columns of the unique index are NULL.
@changelog_1244_li
@changelog_1246_li
#There is a problem with Hibernate when using Boolean columns. A patch for Hibernate has been submitted at http://opensource.atlassian.com/projects/hibernate/browse/HHH-3401
@changelog_1245_li
@changelog_1247_li
#ORDER BY on tableName.columnName didn't work correctly if the column name was also used as an alias.
@changelog_1246_li
@changelog_1248_li
#H2 Console: The progress display when opening a database has been improved.
@changelog_1247_li
@changelog_1249_li
#The error message when the server doesn't start has been improved.
@changelog_1248_li
@changelog_1250_li
#Key values can now be changed in updatable result sets.
@changelog_1249_li
@changelog_1251_li
#Changes in updatable result sets are now visible even when resetting the result set.
@changelog_1250_li
@changelog_1252_li
#Temporary files were sometimes deleted too late when executing large insert, update, or delete operations.
@changelog_1251_li
@changelog_1253_li
#The database file was growing after deleting many rows, and after large update operations.
@changelog_1252_h2
@changelog_1254_h2
#Version 1.0.75 (2008-07-14)
@changelog_1253_li
@changelog_1255_li
#Multi version concurrency (MVCC): when a row was updated or deleted, but this change was rolled back, the row was not visible by other sessions if no index was used to access it. Fixed.
@changelog_1254_li
@changelog_1256_li
#Views with multiple joined tables (where one was an outer join) couldn't be used in some cases. Fixed.
@changelog_1255_li
@changelog_1257_li
#The CSVREAD method did not process NULL correctly when using a whitespace field separator.
@changelog_1256_li
@changelog_1258_li
#Fixed the Oracle mode: Oracle allows multiple rows with NULL in a unique index.
@changelog_1257_li
@changelog_1259_li
#Running out of memory could result in incomplete transactions or corrupted databases. Fixed.
@changelog_1258_li
@changelog_1260_li
#When using order by in a query that uses the same table multiple times, the order could be incorrect. Fixed.
@changelog_1259_li
@changelog_1261_li
#Referential constraint checking improvement: now the constraint is only checked if the key column values change.
@changelog_1260_li
@changelog_1262_li
#Some database metadata calls returned the wrong data type for DATA_TYPE columns.
@changelog_1261_li
@changelog_1263_li
#The Lucene fulltext index was empty when opening a database with fulltext index enabled, and re-indexing it didn't work. Fixed.
@changelog_1262_li
@changelog_1264_li
#The character '$' could not be used in identifier names (table name, column names and so on). Fixed.
@changelog_1263_li
@changelog_1265_li
#The new method org.h2.tools.Server.startWebServer(conn) starts the H2 Console to inspect a database while debugging.
@changelog_1264_li
@changelog_1266_li
#Stopping a WebServer didn't always work. Fixed.
@changelog_1265_h2
@changelog_1267_h2
#Version 1.0.74 (2008-06-21)
@changelog_1266_li
@changelog_1268_li
#Work on row level locking has been started (but there is nothing usable yet).
@changelog_1267_li
@changelog_1269_li
#JaQu (Java Query), a tool similar to LINQ (Language Integrated Query; from Microsoft) is now included under src/tools/org/h2/jaqu. A small sample application is included under src/test/org/h2/test/jaqu.
@changelog_1268_li
@changelog_1270_li
#The source code is now switched to Java 1.6 by default. To switch back to Java 1.4, run 'build compile'. The h2.jar file is still Java 1.4.
@changelog_1269_li
@changelog_1271_li
#The ChangePassword tool is now called ChangeFileEncryption.
@changelog_1270_li
@changelog_1272_li
#It is no longer allowed to create columns with the data type NULL. Also, it is no longer allowed to convert a column to the data type NULL. This was possible before but caused data loss.
@changelog_1271_li
@changelog_1273_li
#When using computed columns or default values with a different data type than the column data type, a class cast exception could occur. Fixed.
@changelog_1272_li
@changelog_1274_li
#Opening databases larger than 1 GB was sometimes very slow if a lot of data was deleted previously. Fixed.
@changelog_1273_li
@changelog_1275_li
#RUNSCRIPT could throw a NullPointerException if the script name was an expression.
@changelog_1274_li
@changelog_1276_li
#Improved compatibility. New compatibility modes for Oracle and Derby. New compatibility flag uniqueIndexNullDistinct to only allow one row with 'NULL' in a unique index. This flag is enabled for Derby, Oracle, MSSQLServer, and HSQLDB.
@changelog_1275_li
@changelog_1277_li
#Linked tables: To view the statements that are executed against the target table, set the trace level to 3.
@changelog_1276_li
@changelog_1278_li
#RunScript tool: new options to show and check the results of queries.
@changelog_1277_li
@changelog_1279_li
#Deadlocks are now detected. One transaction is rolled back automatically.
@changelog_1278_li
@changelog_1280_li
#The Lucene fulltext index was always re-created when opening a database with fulltext index enabled.
@changelog_1279_li
@changelog_1281_li
#Support for overloaded Java methods. A user defined function can now be bound to multiple Java methods, if the Java methods have the same name but a different number of parameters. Thanks to Gary Tong for providing a patch!
@changelog_1280_h2
@changelog_1282_h2
#Version 1.0.73 (2008-05-31)
@changelog_1281_li
@changelog_1283_li
#ParameterMetaData now returns the right data type for most conditions, as in WHERE ID=?.
@changelog_1282_li
@changelog_1284_li
#The table SYSTEM_RANGE now supports expressions and parameters.
@changelog_1283_li
@changelog_1285_li
#New column INFORMATION_SCHEMA.CONSTRAINTS.UNIQUE_INDEX_NAME that contains the name of the unique index used to enforce this constraint, if there is such an index.
@changelog_1284_li
@changelog_1286_li
#SET QUERY_TIMEOUT and Statement.setQueryTimeout no longer commits a transaction. The same applies to SET @VARIABLE, SET LOCK_TIMEOUT, SET TRACE_LEVEL_*, SET THROTTLE, and SET PATH.
@changelog_1285_li
@changelog_1287_li
#The SCRIPT command does now emit IF NOT EXISTS for CREATE ROLE.
@changelog_1286_li
@changelog_1288_li
#MySQL compatibility: auto_increment column are no longer automatically converted to primary key columns.
@changelog_1287_li
@changelog_1289_li
#PostgreSQL compatibility: support for BOOL_OR and BOOL_AND aggregate functions.
@changelog_1288_li
@changelog_1290_li
#Negative scale values for DECIMAL or NUMBER columns are now supported in regular tables and in linked tables.
@changelog_1289_li
@changelog_1291_li
#A role or right can now be granted or revoked multiple times without getting an exception.
@changelog_1290_li
@changelog_1292_li
#Infinite numbers in SQL scripts are listed as POWER(0, -1)), negative infinite as (-POWER(0, -1)), and NaN (not a number) as SQRT(-1).
@changelog_1291_li
@changelog_1293_li
#The special double and float values 'NaN' (not a number) did not work correctly when sorting or comparing.
@changelog_1292_li
@changelog_1294_li
#The fulltext search did not support CLOB data types.
@changelog_1293_li
@changelog_1295_li
#If the drive with the database files was disconnected or unmounted while writing, sometimes a stack overflow exception was thrown instead of a IO exception.
@changelog_1294_li
@changelog_1296_li
#The H2 Console could not be shut down from within the tool if the browser supports keepAlive (most browsers do).
@changelog_1295_li
@changelog_1297_li
#If the password was passed as a char array, it was kept in an internal buffer longer than required. Theoretically the password could have been stolen if the main memory was swapped to disk before the garbage collection was run.
@changelog_1296_h2
@changelog_1298_h2
#Version 1.0.72 (2008-05-10)
@changelog_1297_li
@changelog_1299_li
#Some databases could not be opened when appending ;RECOVER=1 to the database URL.
@changelog_1298_li
@changelog_1300_li
#The Japanese translation of the error messages and the H2 Console has been completed by Masahiro Ikemoto (Arizona Design Inc.)
@changelog_1299_li
@changelog_1301_li
#Updates made to updatable rows are now visible within the same result set. DatabaseMetaData.ownUpdatesAreVisible now returns true.
@changelog_1300_li
@changelog_1302_li
#ParameterMetaData now returns the correct data for INSERT and UPDATE statements.
@changelog_1301_li
@changelog_1303_li
#H2 Shell: DESCRIBE now supports an schema name.
@changelog_1302_li
@changelog_1304_li
#A subset of the PostgreSQL 'dollar quoting' feature is now supported.
@changelog_1303_li
@changelog_1305_li
#SLF4J is now supported by using adding TRACE_LEVEL_FILE=4 to the database URL.
@changelog_1304_li
@changelog_1306_li
#The recovery tool did not work if the table name contained spaces or if there was a comment on the table.
@changelog_1305_li
@changelog_1307_li
#Triggers are no longer executed when changing the table structure (ALTER TABLE).
@changelog_1306_li
@changelog_1308_li
#When setting BLOB or CLOB values larger than 65 KB using a remote connection, temporary files were kept on the client longer than required (until the connection was closed or the object is garbage collected). Now they are removed as soon as the PreparedStatement is closed, or when the value is overwritten.
@changelog_1307_li
@changelog_1309_li
#Statements can now be canceled remotely (when using remote connections).
@changelog_1308_li
@changelog_1310_li
#The Shell tool now uses java.io.Console to read the password when using JDK 1.6
@changelog_1309_li
@changelog_1311_li
#When using read-only databases and setting LOG=2, an exception was written to the trace file when closing the database. Fixed.
@changelog_1310_h2
@changelog_1312_h2
#Version 1.0.71 (2008-04-25)
@changelog_1311_li
@changelog_1313_li
#H2 is now dual-licensed under the Eclipse Public License (EPL) and the old 'H2 License' (which is basically MPL).
@changelog_1312_li
@changelog_1314_li
#Sometimes an exception 'File ID mismatch' or 'try to add a record twice' occurred after large records (8 KB or larger) are updated or deleted. See also http://code.google.com/p/h2database/issues/detail?id=22
@changelog_1313_li
@changelog_1315_li
#H2 Console: The tools can now be translated (it didn't work in the last release).
@changelog_1314_li
@changelog_1316_li
#New traditional Chinese translation. Thanks a lot to Derek Chao!
@changelog_1315_li
@changelog_1317_li
#Indexes were not used when enabling the optimization for IN(SELECT...) (system property h2.optimizeInJoin).
@changelog_1316_h2
@changelog_1318_h2
#Version 1.0.70 (2008-04-20)
@changelog_1317_li
@changelog_1319_li
#The plan is to dual-license H2. The additional license is EPL (Eclipse Public License). The current license (MPL, Mozilla Public License) will stay. Current users are not affected because they can keep MPL. EPL is very similar to MPL, the only bigger difference is related to patents (EPL is a bit more business friendly in this regard). See also http://opensource.org/licenses/eclipse-1.0.php, http://www.eclipse.org/legal/eplfaq.php (FAQ), http://blogs.zdnet.com/Burnette/?p=131
@changelog_1318_li
@changelog_1320_li
#Multi version concurrency (MVCC): when a row was updated, and the updated column was not indexed, this update was visible sometimes for other sessions even if it was not committed.
@changelog_1319_li
@changelog_1321_li
#Calling SHUTDOWN on one connection and starting a query on another connection concurrently could result in a Java level deadlock.
@changelog_1320_li
@changelog_1322_li
#New system property h2.enableAnonymousSSL (default: true) to enable anonymous SSL connections.
@changelog_1321_li
@changelog_1323_li
#The precision if SUBSTR is now calculated if possible.
@changelog_1322_li
@changelog_1324_li
#The autocomplete in the H2 Console has been improved a bit.
@changelog_1323_li
@changelog_1325_li
#The tools in the H2 Console are now translatable.
@changelog_1324_li
@changelog_1326_li
#The servlet and lucene jar files are now automatically downloaded when building.
@changelog_1325_li
@changelog_1327_li
#The code switch tool has been replaced by a simpler tool called SwitchSource that just uses find and replace.
@changelog_1326_li
@changelog_1328_li
#Started to write a Ant replacement ('JAnt') that uses pure Java build definitions. Advantages: ability to debug the build, extensible, flexible, no XML, a bit faster. Future plan: support creating custom h2 distributions (for embedded use). Maybe create a new project 'Jant' or 'Javen' if other people are interested.
@changelog_1327_li
@changelog_1329_li
#The jar file is now about 10% smaller because the variable debugging info is no longer included. The source file and line number debugging info is still included. If required, the jar file size of the full version can be further reduced to about 720 KB using 'build jarSmall' or even more by removing unneeded components.
@changelog_1328_li
@changelog_1330_li
#Added shell scripts run.sh and build.sh. chmod +x is required, but otherwise it should work. Feedback or improvements are welcome!
@changelog_1329_li
@changelog_1331_li
#Databases in zip files: large queries are now supported. Temp files are created in the temp directory if required. The documentation how to create the zip file has been corrected.
#The Japanese translation of the error messages and the H2 Console has been improved. Thanks a lot to Masahiro IKEMOTO.
@changelog_1332_li
@changelog_1334_li
#Optimization for MIN() and MAX() when using MVCC.
@changelog_1333_li
@changelog_1335_li
#To protect against remote brute force password attacks, the delay after each unsuccessful login now gets double as long. New system properties h2.delayWrongPasswordMin and h2.delayWrongPasswordMax.
@changelog_1334_li
@changelog_1336_li
#After setting the query timeout and then resetting it, the next query would still timeout. Fixed.
@changelog_1335_li
@changelog_1337_li
#Adding a IDENTITY column to a table with data threw a lock timeout.
@changelog_1336_li
@changelog_1338_li
#OutOfMemoryError could occur when using EXISTS or IN(SELECT ..).
@changelog_1337_li
@changelog_1339_li
#The built-in connection pool is not called JdbcConnectionPool. The API and documentation has been changed.
@changelog_1338_li
@changelog_1340_li
#The ConvertTraceFile tool now generates SQL statement statistics at the end of the SQL script file (similar to the profiling data generated when using java -Xrunhprof).
@changelog_1339_li
@changelog_1341_li
#Nested joins are now supported (A JOIN B JOIN C ON .. ON ..)
@download_1000_h1
...
...
@@ -7510,682 +7516,682 @@ SQLコマンドがコマンドエリアに表示されます。
#Full outer joins
@roadmap_1028_li
#Support trigger on the tables information_schema.tables and ...columns
#Maven: deploy / upload h2..-sources.jar and javadocs as well.
@roadmap_1029_li
#Test very large databases and LOBs (up to 256 GB)
#Support trigger on the tables information_schema.tables and ...columns
@roadmap_1030_li
#Support hints for the optimizer (which index to use, enforce the join order).
#Test very large databases and LOBs (up to 256 GB)
@roadmap_1031_li
#Change LOB mechanism (less files, keep index of lob files, point to files and row, delete unused files earlier, maybe bundle files into a tar file)
#Support hints for the optimizer (which index to use, enforce the join order).
@roadmap_1032_li
#Clustering: recovery needs to becomes fully automatic. Global write lock feature.
#Change LOB mechanism (less files, keep index of lob files, point to files and row, delete unused files earlier, maybe bundle files into a tar file)
@roadmap_1033_li
#Support mixed clustering mode (one embedded, the other server mode)
#Clustering: recovery needs to becomes fully automatic. Global write lock feature.
@roadmap_1034_li
#Sequence: add features [NO] MINVALUE, MAXVALUE, CYCLE
#Support mixed clustering mode (one embedded, the other server mode)
#Linked schema using CSV files: one schema for a directory of files; support indexes for CSV files
@roadmap_1070_li
#Implement missing JDBC API (CallableStatement,...)
#iReport to support H2
@roadmap_1071_li
#Compression of the cache
#Implement missing JDBC API (CallableStatement,...)
@roadmap_1072_li
#Include SMPT (mail) server (at least client) (alert on cluster failure, low disk space,...)
#Compression of the cache
@roadmap_1073_li
#Drop with restrict (currently cascade is the default)
#Include SMPT (mail) server (at least client) (alert on cluster failure, low disk space,...)
@roadmap_1074_li
#JSON parser and functions
#Drop with restrict (currently cascade is the default)
@roadmap_1075_li
#Automatic collection of statistics (auto ANALYZE)
#JSON parser and functions
@roadmap_1076_li
#Server: client ping from time to time (to avoid timeout - is timeout a problem?)
#Automatic collection of statistics (auto ANALYZE)
@roadmap_1077_li
#Copy database: Tool with config GUI and batch mode, extensible (example: compare)
#Server: client ping from time to time (to avoid timeout - is timeout a problem?)
@roadmap_1078_li
#Document, implement tool for long running transactions using user-defined compensation statements.
#Copy database: Tool with config GUI and batch mode, extensible (example: compare)
@roadmap_1079_li
#Support SET TABLE DUAL READONLY
#Document, implement tool for long running transactions using user-defined compensation statements.
@roadmap_1080_li
#GCJ: what is the state now?
#Support SET TABLE DUAL READONLY
@roadmap_1081_li
#Events for: Database Startup, Connections, Login attempts, Disconnections, Prepare (after parsing), Web Server (see http://docs.openlinksw.com/virtuoso/fn_dbev_startup.html)
#GCJ: what is the state now?
@roadmap_1082_li
#Optimization: Log compression
#Events for: Database Startup, Connections, Login attempts, Disconnections, Prepare (after parsing), Web Server (see http://docs.openlinksw.com/virtuoso/fn_dbev_startup.html)
@roadmap_1083_li
#Support standard INFORMATION_SCHEMA tables, as defined in http://www.contrib.andrew.cmu.edu/~shadow/sql/sql1992.txt; specially KEY_COLUMN_USAGE (http://dev.mysql.com/doc/refman/5.0/en/information-schema.html, http://www.xcdsql.org/Misc/INFORMATION_SCHEMA%20With%20Rolenames.gif)
#Optimization: Log compression
@roadmap_1084_li
#Compatibility: in MySQL, HSQLDB, /0.0 is NULL; in PostgreSQL, Derby: Division by zero
#Support standard INFORMATION_SCHEMA tables, as defined in http://www.contrib.andrew.cmu.edu/~shadow/sql/sql1992.txt; specially KEY_COLUMN_USAGE (http://dev.mysql.com/doc/refman/5.0/en/information-schema.html, http://www.xcdsql.org/Misc/INFORMATION_SCHEMA%20With%20Rolenames.gif)
@roadmap_1085_li
#Functional tables should accept parameters from other tables (see FunctionMultiReturn) SELECT * FROM TEST T, P2C(T.A, T.R)
#Compatibility: in MySQL, HSQLDB, /0.0 is NULL; in PostgreSQL, Derby: Division by zero
@roadmap_1086_li
#Custom class loader to reload functions on demand
#Functional tables should accept parameters from other tables (see FunctionMultiReturn) SELECT * FROM TEST T, P2C(T.A, T.R)
@roadmap_1087_li
#Test http://mysql-je.sourceforge.net/
#Custom class loader to reload functions on demand
@roadmap_1088_li
#Close all files when closing the database (including LOB files that are open on the client side)
#Test http://mysql-je.sourceforge.net/
@roadmap_1089_li
#EXE file: maybe use http://jsmooth.sourceforge.net
#Close all files when closing the database (including LOB files that are open on the client side)
@roadmap_1090_li
#Performance: Automatically build in-memory indexes if the whole table is in memory
#EXE file: maybe use http://jsmooth.sourceforge.net
@roadmap_1091_li
#H2 Console: The webclient could support more features like phpMyAdmin.
#Performance: Automatically build in-memory indexes if the whole table is in memory
@roadmap_1092_li
#Use Janino to convert Java to C++
#H2 Console: The webclient could support more features like phpMyAdmin.
@roadmap_1093_li
#The HELP information schema can be directly exposed in the Console
#Use Janino to convert Java to C++
@roadmap_1094_li
#Maybe use the 0x1234 notation for binary fields, see MS SQL Server
#The HELP information schema can be directly exposed in the Console
@roadmap_1095_li
#Support Oracle CONNECT BY in some way: http://www.adp-gmbh.ch/ora/sql/connect_by.html, http://philip.greenspun.com/sql/trees.html
#Maybe use the 0x1234 notation for binary fields, see MS SQL Server
@roadmap_1096_li
#SQL Server 2005, Oracle: Support COUNT(*) OVER(). See http://www.orafusion.com/art_anlytc.htm
#Support Oracle CONNECT BY in some way: http://www.adp-gmbh.ch/ora/sql/connect_by.html, http://philip.greenspun.com/sql/trees.html
@roadmap_1097_li
#RANK() and DENSE_RANK(), Partition using OVER()
#SQL Server 2005, Oracle: Support COUNT(*) OVER(). See http://www.orafusion.com/art_anlytc.htm
#Write Behind Cache on SATA leads to data corruption See also http://sr5tech.com/write_back_cache_experiments.htm and http://www.jasonbrome.com/blog/archives/2004/04/03/writecache_enabled.html
#Option to encrypt .trace.db file
@roadmap_1121_li
#Functions with unknown return or parameter data types: serialize / deserialize
#Write Behind Cache on SATA leads to data corruption See also http://sr5tech.com/write_back_cache_experiments.htm and http://www.jasonbrome.com/blog/archives/2004/04/03/writecache_enabled.html
@roadmap_1122_li
#Test if idle TCP connections are closed, and how to disable that
#Functions with unknown return or parameter data types: serialize / deserialize
@roadmap_1123_li
#Try using a factory for Row, Value[] (faster?), http://javolution.org/, alternative ObjectArray / IntArray
#Test if idle TCP connections are closed, and how to disable that
@roadmap_1124_li
#Auto-Update feature for database, .jar file
#Try using a factory for Row, Value[] (faster?), http://javolution.org/, alternative ObjectArray / IntArray
@roadmap_1125_li
#ResultSet SimpleResultSet.readFromURL(String url): id varchar, state varchar, released timestamp
#Auto-Update feature for database, .jar file
@roadmap_1126_li
#ROW_NUMBER (not the same as ROWNUM)
#ResultSet SimpleResultSet.readFromURL(String url): id varchar, state varchar, released timestamp
@roadmap_1127_li
#Partial indexing (see PostgreSQL)
#ROW_NUMBER (not the same as ROWNUM)
@roadmap_1128_li
#The build should fail if the test fails
#Partial indexing (see PostgreSQL)
@roadmap_1129_li
#Add GUI to build a custom version (embedded, fulltext,...) using build flags
#The build should fail if the test fails
@roadmap_1130_li
#http://rubyforge.org/projects/hypersonic/
#Add GUI to build a custom version (embedded, fulltext,...) using build flags
@roadmap_1131_li
#Add comparator (x === y) : (x = y or (x is null and y is null))
#http://rubyforge.org/projects/hypersonic/
@roadmap_1132_li
#Try to create trace file even for read only databases
#Add comparator (x === y) : (x = y or (x is null and y is null))
@roadmap_1133_li
#Add a sample application that runs the H2 unit test and writes the result to a file (so it can be included in the user app)
#Try to create trace file even for read only databases
@roadmap_1134_li
#Count on a column that can not be null could be optimized to COUNT(*)
#Add a sample application that runs the H2 unit test and writes the result to a file (so it can be included in the user app)
@roadmap_1135_li
#Table order: ALTER TABLE TEST ORDER BY NAME DESC (MySQL compatibility)
#Count on a column that can not be null could be optimized to COUNT(*)
@roadmap_1136_li
#Backup tool should work with other databases as well
#Table order: ALTER TABLE TEST ORDER BY NAME DESC (MySQL compatibility)
@roadmap_1137_li
#Console: -ifExists doesn't work for the console. Add a flag to disable other dbs
#Backup tool should work with other databases as well
@roadmap_1138_li
#Performance: Update in-place
#Console: -ifExists doesn't work for the console. Add a flag to disable other dbs
@roadmap_1139_li
#Check if 'FSUTIL behavior set disablelastaccess 1' improves the performance (fsutil behavior query disablelastaccess)
#Support multiple directories (on different hard drives) for the same database
#Allow execution time prepare for SELECT * FROM CSVREAD(?, 'columnNameString')
@roadmap_1204_li
#Server protocol: use challenge response authentication, but client sends hash(user+password) encrypted with response
#Support multiple directories (on different hard drives) for the same database
@roadmap_1205_li
#Support EXEC[UTE] (doesn't return a result set, compatible to MS SQL Server)
#Server protocol: use challenge response authentication, but client sends hash(user+password) encrypted with response
@roadmap_1206_li
#Support native XML data type
#Support EXEC[UTE] (doesn't return a result set, compatible to MS SQL Server)
@roadmap_1207_li
#Support triggers with a string property or option: SpringTrigger, OSGITrigger
#Support native XML data type
@roadmap_1208_li
#Clustering: adding a node should be very fast and without interrupting clients (very short lock)
#Support triggers with a string property or option: SpringTrigger, OSGITrigger
@roadmap_1209_li
#Support materialized views (using triggers)
#Clustering: adding a node should be very fast and without interrupting clients (very short lock)
@roadmap_1210_li
#Store dates in local time zone (portability of database files)
#Support materialized views (using triggers)
@roadmap_1211_li
#Ability to resize the cache array when resizing the cache
#Store dates in local time zone (portability of database files)
@roadmap_1212_li
#Time based cache writing (one second after writing the log)
#Ability to resize the cache array when resizing the cache
@roadmap_1213_li
#Check state of H2 driver for DDLUtils: https://issues.apache.org/jira/browse/DDLUTILS-185
#Time based cache writing (one second after writing the log)
@roadmap_1214_li
#Index usage for REGEXP LIKE.
#Check state of H2 driver for DDLUtils: https://issues.apache.org/jira/browse/DDLUTILS-185
@roadmap_1215_li
#Compatibility: add a role DBA (like ADMIN).
#Index usage for REGEXP LIKE.
@roadmap_1216_li
#Better support multiple processors for in-memory databases.
#Compatibility: add a role DBA (like ADMIN).
@roadmap_1217_li
#Access rights: remember the owner of an object. COMMENT: allow owner of object to change it.
#Better support multiple processors for in-memory databases.
@roadmap_1218_li
#Access rights: Finer grained access control (grant access for specific functions)
#Access rights: remember the owner of an object. COMMENT: allow owner of object to change it.
@roadmap_1219_li
#Support N'text'
#Access rights: Finer grained access control (grant access for specific functions)
@roadmap_1220_li
#Support SCOPE_IDENTITY() to avoid problems when inserting rows in a trigger
#Support N'text'
@roadmap_1221_li
#Set a connection read only (Connection.setReadOnly)
#Support SCOPE_IDENTITY() to avoid problems when inserting rows in a trigger
@roadmap_1222_li
#In MySQL mode, for AUTO_INCREMENT columns, don't set the primary key
#Set a connection read only (Connection.setReadOnly)
@roadmap_1223_li
#Use JDK 1.4 file locking to create the lock file (but not yet by default); writing a system property to detect concurrent access from the same VM (different classloaders).
#In MySQL mode, for AUTO_INCREMENT columns, don't set the primary key
@roadmap_1224_li
#Support compatibility for jdbc:hsqldb:res:
#Use JDK 1.4 file locking to create the lock file (but not yet by default); writing a system property to detect concurrent access from the same VM (different classloaders).
@roadmap_1225_li
#Provide an Java SQL builder with standard and H2 syntax
#Support compatibility for jdbc:hsqldb:res:
@roadmap_1226_li
#Trace: write OS, file system, JVM,... when opening the database
#Provide an Java SQL builder with standard and H2 syntax
@roadmap_1227_li
#Support indexes for views (probably requires materialized views)
#Trace: write OS, file system, JVM,... when opening the database
@roadmap_1228_li
#Document SET SEARCH_PATH, BEGIN, EXECUTE, parameters
#Support indexes for views (probably requires materialized views)
@roadmap_1229_li
#Browser: use Desktop.isDesktopSupported and browse when using JDK 1.6
#Document SET SEARCH_PATH, BEGIN, EXECUTE, parameters
@roadmap_1230_li
#Server: use one listener (detect if the request comes from an PG or TCP client)
#Browser: use Desktop.isDesktopSupported and browse when using JDK 1.6
@roadmap_1231_li
#Store dates as 'local'. Existing files use GMT. Use escape syntax for compatibility.
#Server: use one listener (detect if the request comes from an PG or TCP client)
@roadmap_1232_li
#Support data type INTERVAL
#Store dates as 'local'. Existing files use GMT. Use escape syntax for compatibility.
@roadmap_1233_li
#Optimize SELECT MIN(ID), MAX(ID), COUNT(*) FROM TEST WHERE ID BETWEEN 100 AND 200
