@@ -28,7 +28,6 @@ See also <a href="build.html#providing_patches">Providing Patches</a>.
</li><li>Page store: new storage mechanism
</li><li>[Requires page store] Support large updates (use the transaction log to undo).
</li><li>[Requires page store] Shutdown compact
</li><li>Optimize IN(...) for SELECT, DELETE, and UPDATE.
</li><li>More tests with MULTI_THREADED=1
</li><li>RECOVER=1 should automatically recover, =2 should run the recovery tool if required
</li><li>Optimization: result set caching (like MySQL)
...
...
@@ -40,20 +39,18 @@ See also <a href="build.html#providing_patches">Providing Patches</a>.
<li>Improve test code coverage
</li><li>Procedural language / script language (Java, Javascript)
</li><li>Fulltext search: support streaming CLOB data.
</li><li>Optimize .. OR .. to IN(..) or UNION if the cost is lower
</li><li>Optimize ID=? OR ID=? to ID IN(?, ?) or UNION if the cost is lower
</li><li>Enable warning for 'Local variable declaration hides another field or variable'.
</li><li>Test multi-threaded in-memory db access
</li><li>MVCC: select for update should only lock the selected rows.
</li><li>Option to shutdown all the running servers (on the same VM).
</li><li>Optimize ID=? OR ID=?: convert to IN(...)
</li><li>Index organized tables CREATE TABLE...(...) ORGANIZATION INDEX (store in data file) (probably file format changes are required for rowId)
</li><li>[Requires page store] Better space re-use in the files after deleting data: shrink the data file without closing the database (if the end of the file is empty)
</li><li>Full outer joins
</li><li>Implement INSTEAD OF trigger (for views, tables, metadata tables).
</li><li>Triggers for metadata tables; use for PostgreSQL catalog
</li><li>Support triggers for INFORMATION_SCHEMA tables (to better support PostgreSQL catalog: rebuild after creating new tables)
</li><li>Full outer joins
</li><li>Use triggers for metadata tables; use for PostgreSQL catalog
</li><li>Maven: deploy / upload h2..-sources.jar and javadocs as well.
</li><li>Support trigger on the tables information_schema.tables and ...columns
</li><li>Test very large databases and LOBs (up to 256 GB)
</li><li>Support hints for the optimizer (which index to use, enforce the join order).
</li><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)
...
...
@@ -70,7 +67,6 @@ See also <a href="build.html#providing_patches">Providing Patches</a>.
</li><li>Don't use deleteOnExit (bug 4513817: File.deleteOnExit consumes memory)
</li><li>Console: add accesskey to most important commands (A, AREA, BUTTON, INPUT, LABEL, LEGEND, TEXTAREA)
</li><li>Support nested outer joins (see todo.txt).
</li><li>Don't write stack traces for common exceptions like duplicate key to the log by default (exclude list)
</li><li>Test performance again with SQL Server, Oracle, DB2
</li><li>Test with dbmonster (http://dbmonster.kernelpanic.pl/)
</li><li>Test with dbcopy (http://dbcopyplugin.sourceforge.net)
...
...
@@ -439,7 +435,7 @@ See also <a href="build.html#providing_patches">Providing Patches</a>.
</li><li>Support =ANY(array) as in PostgreSQL.
</li><li>IBM DB2 compatibility: support PREVIOUS VALUE FOR sequence.
</li><li>MySQL compatibility: alter table add index i(c), add constraint c foreign key(c) references t(c);
</li><li>Compatibility: use different LIKE ESCAPE characters depending on the mode (disable for Derby, HSQLDB, DB2, Oracle).
</li><li>Compatibility: use different LIKE ESCAPE characters depending on the mode (disable for Derby, HSQLDB, DB2, Oracle, MSSQLServer).
The stack trace of very common exceptions is no longer written to the .trace.db file by default.
@changelog_1003_h2
@changelog_1003_li
An optimization for IN(..) and IN(SELECT...) is implemented, but disabled by default. To enable, set the system property h2.optimizeInList to true before loading the H2 JDBC driver. If enabled, this overrides h2.optimizeIn and h2.optimizeInJoin. Unlike now, this optimization will also speed up updates and deletes.
@changelog_1004_h2
Version 1.1.117 (2009-08-09)
@changelog_1004_li
@changelog_1005_li
New committer: Sam Van Oort has been contributing to H2 since quite some time in many ways (on the mailing list, documentation, and in the form of patches). He is now a committer.
@changelog_1005_li
@changelog_1006_li
JaQu: the order of the fields in the database no longer needs to match the order in the database.
@changelog_1006_li
@changelog_1007_li
Issue 103: MVCC: the setting MAX_MEMORY_UNDO can currently not be supported when using multi-version concurrency, that means the complete undo log must fit in memory.
@changelog_1007_li
@changelog_1008_li
LIKE: the escape mechanism can now be disable using ESCAPE ''. The default escape character can be changed using the system property h2.defaultEscape. The default is still '\' (as in MySQL and PostgreSQL).
@changelog_1008_li
@changelog_1009_li
Views using functions were not re-evaluated when necessary.
@changelog_1009_li
@changelog_1010_li
Improved MySQL compatibility for SHOW COLUMNS.
@changelog_1010_li
@changelog_1011_li
Improved PostgreSQL compatibility for timestamp literals with timezone.
@changelog_1011_li
@changelog_1012_li
Sergi Vladykin translated the error messages to Russian. Thanks a lot!
@changelog_1012_li
@changelog_1013_li
Support for Java 6 DatabaseMetaData.getTables, getColumns, getProcedures, and getProcedureColumns.
@changelog_1013_li
@changelog_1014_li
Issue 101: Rollback of a large transaction (more than 100000 rows) could fail.
@changelog_1014_li
@changelog_1015_li
Various bugfixes and improvements in the page store mechanism (still experimental).
@changelog_1015_li
@changelog_1016_li
The functions LENGTH, OCTET_LENGTH, and BIT_LENGTH now return BIGINT.
@changelog_1016_li
@changelog_1017_li
Data types CLOB and BLOB: the maximum precision was Integer.MAX_VALUE, it is now Long.MAX_VALUE.
@changelog_1017_li
@changelog_1018_li
Multi-threaded kernel: creating and dropping temporary database objects and the potentially free pages list was not correctly synchronized. Thanks a lot to Eric Faulhaber for the test case and patch!
@changelog_1018_li
@changelog_1019_li
Parsing SQL script files is now faster.
@changelog_1019_li
@changelog_1020_li
CSV reading is now faster.
@changelog_1020_li
@changelog_1021_li
SimpleResultSet.newInstance(SimpleRowSource rs) did not work.
@changelog_1021_h2
@changelog_1022_h2
Version 1.1.116 (2009-07-18)
@changelog_1022_li
@changelog_1023_li
Server-less multi-connection mode: more bugs are fixed.
@changelog_1023_li
@changelog_1024_li
The built-in help (INFORMATION_SCHEMA.HELP) is smaller, shrinking the jar file size a bit.
@changelog_1024_li
@changelog_1025_li
H2 Console: column of tables of non-default schemas are now also listed, except for schemas starting with 'INFO'.
@changelog_1025_li
@changelog_1026_li
ALTER TABLE: removing an auto-increment or identity column didn't remove the sequence.
@changelog_1026_li
@changelog_1027_li
Creating indexes is now a bit faster.
@changelog_1027_li
@changelog_1028_li
PG Server: new system property h2.pgClientEncoding to explicitly set the encoding for clients that don't send the encoding (the default encoding is UTF-8). Thanks a lot to Sergi Vladykin for the patch!
@changelog_1028_li
@changelog_1029_li
PG Server: improved compatibility by using the type ids of the PostgreSQL driver. Thanks a lot to Sergi Vladykin for the patch!
@changelog_1029_li
@changelog_1030_li
H2 Console: Oracle system tables are no longer listed, improving performance.
@changelog_1030_li
@changelog_1031_li
Result sets are now read-only except if the statement or prepared statement was created with the concurrency ResultSet.CONCUR_UPDATABLE. This change is required because the old behavior (all result set are updatable) violated the JDBC spec. For backward compatibility, use the system property h2.defaultResultSetConcurrency.
@changelog_1031_li
@changelog_1032_li
New system property h2.defaultResultSetConcurrency to change the default result set concurrency.
@changelog_1032_li
@changelog_1033_li
JDBC: using an invalid result set type or concurrency now throws an exception.
@changelog_1033_li
@changelog_1034_li
If a pooled connection was not closed but garbage collected, a NullPointerException could occur.
@changelog_1034_li
@changelog_1035_li
Fulltext search: a NullPointerException was thrown when updating a value that was NULL previously.
@changelog_1035_li
@changelog_1036_li
The Recover tool did not work with .data.db files of the wrong size.
@changelog_1036_li
@changelog_1037_li
Triggers: if there was an exception when initializing a trigger, this exception could be hidden, and in some cases (specially when using the Lucene fulltext index mechanism) a NullPointerException was thrown later on. Now the exception that occurred on init is thrown when changing data.
@changelog_1037_li
@changelog_1038_li
The soft-references cache (CACHE_TYPE=SOFT_LRU) could throw a NullPointerException.
@changelog_1038_li
@changelog_1039_li
To enable the new page store mechanism, append ;PAGE_STORE=TRUE to the database URL. or set the system property h2.pageStore to true. This mechanism is still experimental, and the file format will change, but it is quite stable now.
@changelog_1039_h2
@changelog_1040_h2
Version 1.1.115 (2009-06-21)
@changelog_1040_li
@changelog_1041_li
The new storage mechanism is now alpha quality. To try it out, set the system property "h2.pageStore" to "true" (java -Dh2.pageStore=true). There are still bugs to be found and fixed, for example inserting many rows references a lot of main memory. Performance is currently about the same as with the regular storage mechanism, but the database file size is smaller. The file format is not stable yet.
@changelog_1041_li
@changelog_1042_li
ALTER TABLE could throw an exception "object already exists" in some cases.
@changelog_1042_li
@changelog_1043_li
Views: in some situations, an ArrayIndexOutOfBoundsException was thrown when using the same view concurrently.
@changelog_1043_li
@changelog_1044_li
java.util.UUID is now supported in PreparedStatement.setObject and user defined Java functions. ResultSet.getObject() returns a java.util.UUID when using the UUID data type.
@changelog_1044_li
@changelog_1045_li
H2 Console: the language was reset to the browser language when disconnecting.
@changelog_1045_li
@changelog_1046_li
H2 Console: improved Polish translation.
@changelog_1046_li
@changelog_1047_li
Server-less multi-connection mode: more bugs are fixed.
@changelog_1047_li
@changelog_1048_li
The download page now included the SHA1 checksums.
@changelog_1048_li
@changelog_1049_li
Shell tool: the file encoding workaround is now documented if you run java org.h2.tools.Shell -?.
@changelog_1049_li
@changelog_1050_li
The RunScript tool and SQL statement did not work with the compression method LZF.
@changelog_1050_li
@changelog_1051_li
Fulltext search: searching for NULL or an empty string threw an exception.
@changelog_1051_li
@changelog_1052_li
Lucene fulltext search: FTL_DROP_ALL did not drop the triggers.
@changelog_1052_li
@changelog_1053_li
Backup: if the database contained CLOB or BLOB data, the backup included a file entry for the LOB directory. This caused the restore to fail.
@changelog_1053_li
@changelog_1054_li
Data types: LONG is now an alias for BIGINT.
@changelog_1054_h2
@changelog_1055_h2
Version 1.1.114 (2009-06-01)
@changelog_1055_li
@changelog_1056_li
ResultSetMetaData.getColumnClassName returned the wrong class for CLOB and BLOB columns.
@changelog_1056_li
@changelog_1057_li
Fulltext search: data is no longer deleted and re-inserted if the indexed columns didn't change.
@changelog_1057_li
@changelog_1058_li
In some situations, an ArrayIndexOutOfBoundsException was thrown when adding rows. This was caused by a bug in the b-tree code.
@changelog_1058_li
@changelog_1059_li
Microsoft Windows Vista: when using the the installer, Vista wrote "This program may not have installed correctly." This message should no longer appear (in the h2.nsi file, the line 'RequestExecutionLevel highest' was added).
@changelog_1059_li
@changelog_1060_li
The Recover tool did not always work when the database contains referential integrity constraints.
@changelog_1060_li
@changelog_1061_li
Java 1.5 is now required to run H2. If required, Retrotranslator can be used to create a Java 1.4 version (http://retrotranslator.sourceforge.net/).
@changelog_1061_h2
@changelog_1062_h2
Version 1.1.113 (2009-05-21)
@changelog_1062_li
@changelog_1063_li
Shell tool: the built-in commands EXIT, HELP, ?, LIST, and so on didn't work with a semicolon at the end.
@changelog_1063_li
@changelog_1064_li
JDK 1.5 is now required to build the jar file. However it is still possible to create a jar file for Java 1.4. For details, see buildRelease.sh and buildRelease.bat. As an alternative, compile using JDK 1.5 or 1.6 and use Retrotranslator to create a Java 1.4 version (http://retrotranslator.sourceforge.net/).
@changelog_1064_li
@changelog_1065_li
When deleting or updating many rows in a table, the space in the index file was not re-used in the default mode (persistent database, b-tree index, LOG=1). This caused the index file to grow over time. Workarounds were to delete and re-created the index file, alter the table (add a remove a column), or append ;LOG=2 to the database URL. To disable the change, set the system property h2.reuseSpaceBtreeIndex to false.
@changelog_1065_li
@changelog_1066_li
Identifiers with a digit and then a dollar sign didn't work. Example: A1$B.
@changelog_1066_li
@changelog_1067_li
MS SQL Server compatibility: support for linked tables with NVARCHAR, NCHAR, NCLOB, and LONGNVARCHAR.
@changelog_1067_li
@changelog_1068_li
Android: workaround for a problem when using read-only databases in zip files (skip seems to be implemented incorrectly on the Android system).
@changelog_1068_li
@changelog_1069_li
Calling execute() or prepareStatement() with null as the SQL statement now throws an exception.
@changelog_1069_li
@changelog_1070_li
Benchmark: the number of executed statements was incorrect. The H2 database was loaded at the beginning of the test to collect results, now it is loaded at the very end. Thanks to Fred Toussi from HSQLDB for reporting those problems. However the changed do not affect the relative performance.
@changelog_1070_li
@changelog_1071_li
H2 Console: command line settings are no longer stored in the properties file. They are now only used for the current process, except if they are explicitly saved.
@changelog_1071_li
@changelog_1072_li
Cache: support for a second level soft-references cache. To enable it, append ;CACHE_TYPE=SOFT_LRU (or SOFT_TQ) to the database URL, or set the system property h2.cacheTypeDefault to "SOFT_LRU" / "SOFT_TQ". Enabling the second level cache reduces performance for small databases, but speeds up large databases. It makes sense to use it if the available memory size is unknown. Thanks a lot to Jan Kotek!
@changelog_1072_h2
@changelog_1073_h2
Version 1.1.112 (2009-05-01)
@changelog_1073_li
@changelog_1074_li
JdbcPreparedStatement.toString() could throw a NullPointerException.
@changelog_1074_li
@changelog_1075_li
EclipseLink: added H2Platform.supportsIdentity().
@changelog_1075_li
@changelog_1076_li
Connection pool: the default login timeout is now 5 minutes.
@changelog_1076_li
@changelog_1077_li
After truncating tables, opening large databases could become slow because indexes were always re-built unnecessarily when opening.
@changelog_1077_li
@changelog_1078_li
More bugs in the server-less multi-connection mode have been fixed: Sometimes parameters of prepared statements were lost when a reconnecting. Concurrent read operations were slow. To improve performance, executeQuery(..) must be used for queries (execute(..) switches to the write mode, which is slow).
@changelog_1078_li
@changelog_1079_li
GROUP BY queries with a self-join (join to the same table) that were grouped by columns with indexes returned the wrong result in some cases.
@changelog_1079_li
@changelog_1080_li
Improved error message when the .lock.db file modification time is in the future.
@changelog_1080_li
@changelog_1081_li
The MERGE statement now returns 0 as the generated key if the row was updated.
@changelog_1081_li
@changelog_1082_li
Running code coverage is now automated.
@changelog_1082_li
@changelog_1083_li
A file system implementation can now be registered using FileSystem.register.
@changelog_1083_li
@changelog_1084_li
The database file system is no longer included in the jar file, it moved to the test section.
@changelog_1084_h2
@changelog_1085_h2
Version 1.1.111 (2009-04-10)
@changelog_1085_li
@changelog_1086_li
In-memory databases can now run inside the Google App Engine.
@changelog_1086_li
@changelog_1087_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_1087_li
@changelog_1088_li
The wrong exception was thrown when using unquoted text for the SQL statements COMMENT, ALTER USER, and SET PASSWORD.
@changelog_1088_li
@changelog_1089_li
The built-in connection pool did not roll back transactions and enable autocommit enabled after closing a connection.
@changelog_1089_li
@changelog_1090_li
Sometimes a StackOverflow occurred when checking for deadlock. See also http://code.google.com/p/h2database/issues/detail?id=61
@changelog_1090_li
@changelog_1091_li
The Shell tool no longer truncates results with only one column, and displays a message if data was truncated.
@changelog_1091_h2
@changelog_1092_h2
Version 1.1.110 (2009-04-03)
@changelog_1092_li
@changelog_1093_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_1093_li
@changelog_1094_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_1094_li
@changelog_1095_li
The data type of a SUBSTRING method was wrong.
@changelog_1095_li
@changelog_1096_li
ResultSet.findColumn and get methods with column label parameters now also check for matching column names (like most databases except MySQL).
@changelog_1096_li
@changelog_1097_li
H2 Console: the browser system property now supports a list of arguments. Example: java -Dh2.browser="open,-a,Safari,%url" ...
@changelog_1097_li
@changelog_1098_li
Improved Javadoc navigation (similar to Scaladoc).
@changelog_1098_li
@changelog_1099_li
H2 Console: auto-complete of identifiers did not work correctly for H2 databases in MySQL mode.
@changelog_1099_li
@changelog_1100_li
DISTINCT and GROUP BY on a CLOB column was broken.
@changelog_1100_li
@changelog_1101_li
The FTP server moved to the tools section and is no longer included in the h2*.jar file.
@changelog_1101_li
@changelog_1102_li
Improved error message for unsupported features: now the message says what exactly is not supported.
@changelog_1102_li
@changelog_1103_li
Improved OSGi support.
@changelog_1103_li
@changelog_1104_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_1104_li
@changelog_1105_li
The API of the tools changed a bit (each tool now returns an exit code).
@changelog_1105_li
@changelog_1106_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_1106_li
@changelog_1107_li
CREATE TABLE: improved compatibility (support for UNIQUE NOT NULL).
@changelog_1107_li
@changelog_1108_li
DatabaseMetaData.getSQLKeywords now returns the correct list.
@changelog_1108_li
@changelog_1109_li
Deterministic user defined functions did not work when the parameter was a column. Fixed.
@changelog_1109_li
@changelog_1110_li
JdbcConnectionPool.setLoginTimeout with 0 now uses the default timeout.
@changelog_1110_li
@changelog_1111_li
Creating a JdbcConnectionPool has been simplified a bit.
@changelog_1111_li
@changelog_1112_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_1112_li
@changelog_1113_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_1113_li
@changelog_1114_li
Linked tables to SQLite database can now be created.
@changelog_1114_li
@changelog_1115_li
Nested IN(IN(...)) didn't work.
@changelog_1115_li
@changelog_1116_li
NIO storage: the nio: prefix was using memory mapped files instead of FileChannel.
@changelog_1116_h2
@changelog_1117_h2
Version 1.1.109 (2009-03-14)
@changelog_1117_li
@changelog_1118_li
The optimization for IN(...) is now only used if comparing a column with an index.
@changelog_1118_li
@changelog_1119_li
User defined functions can now be deterministic (see CREATE ALIAS documentation).
@changelog_1119_li
@changelog_1120_li
Multiple nested queries in the FROM clause with parameters did not always work.
@changelog_1120_li
@changelog_1121_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_1121_li
@changelog_1122_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_1122_li
@changelog_1123_li
The functions BITOR, BITAND, BITXOR, and MOD now accept and return BIGINT instead of INT.
@changelog_1123_li
@changelog_1124_li
Could not use the same linked table multiple times in the same query.
@changelog_1124_li
@changelog_1125_li
Bugs in the server-less multi-connection mode have been fixed.
@changelog_1125_li
@changelog_1126_li
Column names could not be named "UNIQUE" (with the quotes).
@changelog_1126_li
@changelog_1127_li
New system function TRANSACTION_ID() to get the current transaction identifier for a session.
@changelog_1127_h2
@changelog_1128_h2
Version 1.1.108 (2009-02-28)
@changelog_1128_li
@changelog_1129_li
When the shutdown hook closed the database, the last log file was deleted too early. This could cause uncommitted changes to be persisted. In some cases, this could cause data corruption.
@changelog_1129_li
@changelog_1130_li
JdbcConnectionPool: it was possible to set a negative connection pool size.
@changelog_1130_li
@changelog_1131_li
Fulltext search did not support table names with a backslash.
@changelog_1131_li
@changelog_1132_li
The internal IntArray class did not work correctly when initialized with a zero length array.
@changelog_1132_li
@changelog_1133_li
The H2 Console web application (war file) did only support ASCII characters. Now UTF-8 is supported.
@changelog_1133_li
@changelog_1134_li
DATEADD does no longer require that the argument is a timestamp.
@changelog_1134_li
@changelog_1135_li
The database file locking mechanism didn't work correctly on Mac OS.
@changelog_1135_li
@changelog_1136_li
Some built-in functions reported the wrong precision, scale, and display size.
@changelog_1136_li
@changelog_1137_li
MySQL compatibility for CREATE TABLE is improved (UNSIGNED, KEY).
@changelog_1137_li
@changelog_1138_li
Recovery did not work if there were more than 255 lobs stored as files.
@changelog_1138_li
@changelog_1139_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_1139_li
@changelog_1140_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_1140_li
@changelog_1141_li
The WebServlet did not close the database when un-deploying the web application.
@changelog_1141_li
@changelog_1142_li
The exception message of failed INSERT or MERGE statements now includes all values and the row number.
@changelog_1142_li
@changelog_1143_li
If opening a database failed with an out of memory exception, some files were not closed.
@changelog_1143_li
@changelog_1144_li
Optimizer: the expected runtime calculation was incorrect. The fixed calculation should give slightly better query plans when using many joins.
@changelog_1144_li
@changelog_1145_li
Improved exception message when connecting to a just started server fails.
@changelog_1145_li
@changelog_1146_li
Connection.isValid is a bit faster.
@changelog_1146_li
@changelog_1147_li
H2 Console: the autocomplete feature has been improved a bit. It can now better parse conditions.
@changelog_1147_li
@changelog_1148_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_1148_h2
@changelog_1149_h2
Version 1.1.107 (2009-01-24)
@changelog_1149_li
@changelog_1150_li
Some DatabaseMetaData operations did not work for non-admin users for versions 1.1.x.
@changelog_1150_li
@changelog_1151_li
The MySQL compatibility extension fromUnixTime now used the English locale.
@changelog_1151_li
@changelog_1152_li
When using LOG=2 and repeatedly updating the last row rows of a table, the index file grew quickly.
@changelog_1152_li
@changelog_1153_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_1153_li
@changelog_1154_li
Enabling the trace mechanism by creating a specially named file is no longer supported.
@changelog_1154_h2
@changelog_1155_h2
Version 1.1.106 (2009-01-04)
@changelog_1155_li
@changelog_1156_li
Statement.setQueryTimeout did not work correctly for some statements.
@changelog_1156_li
@changelog_1157_li
CREATE DOMAIN: built-in data types can now only be changed if no tables exist.
@changelog_1157_li
@changelog_1158_li
Linked tables: a workaround for Oracle DATE columns has been implemented.
@changelog_1158_li
@changelog_1159_li
DatabaseMetaData.getPrimaryKeys: the column PK_NAME now contains the constraint name instead of the index name (compatibility for PostgreSQL and Derby).
@changelog_1159_li
@changelog_1160_li
Using IN(..) inside a IN(SELECT..) did not always work.
@changelog_1160_li
@changelog_1161_li
Views with IN(..) that used a view itself did not work.
@changelog_1161_li
@changelog_1162_li
Union queries with LIMIT or ORDER BY that are used in a view or subquery did not work.
@changelog_1162_li
@changelog_1163_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_1163_li
@changelog_1164_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_1164_li
@changelog_1165_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_1165_h2
@changelog_1166_h2
Version 1.1.105 (2008-12-19)
@changelog_1166_li
@changelog_1167_li
The setting STORAGE=TEXT is no longer supported.
@changelog_1167_li
@changelog_1168_li
Deleting a database using the tool DeleteDbFiles deleted LOB files of other databases in the same directory.
@changelog_1168_li
@changelog_1169_li
When used in a subquery, LIKE and IN(..) did not work correctly sometimes.
@changelog_1169_li
@changelog_1170_li
The fulltext search documentation has been improved.
@changelog_1170_li
@changelog_1171_li
ARRAY_GET returned the wrong data type (ARRAY). Now it returns VARCHAR.
@changelog_1171_li
@changelog_1172_li
Natural join: the joined columns are not repeated any more when using SELECT *.
@changelog_1172_li
@changelog_1173_li
User defined aggregate functions: the method getType expected internal data types instead of SQL types.
@changelog_1173_li
@changelog_1174_li
User defined aggregate functions did not work if there was no group by expression.
@changelog_1174_li
@changelog_1175_li
MySQL compatibility: support for := assignment as in @sum:=@sum+x
@changelog_1175_li
@changelog_1176_li
INSERT INTO TEST(SELECT * FROM TEST) is now supported.
@changelog_1176_li
@changelog_1177_li
Each session threw an invisible exception when garbage collected.
@changelog_1177_li
@changelog_1178_li
Foreign key constraints that refer to a quoted column did not work.
@changelog_1178_li
@changelog_1179_li
New meta data column INFORMATION_SCHEMA.TABLES.LAST_MODIFICATION to get the table modification counter.
@changelog_1179_li
@changelog_1180_li
Shell: line comments didn't work correctly.
@changelog_1180_li
@changelog_1181_li
H2 Console: columns are now listed for up to 500 tables instead of 100.
@changelog_1181_li
@changelog_1182_li
H2 Console: Cmd+Enter executes the current statement, Alt+Space for autocomplete.
@changelog_1182_li
@changelog_1183_li
JaQu: the maximum length of a column can now be defined using maxLength. For an example, see Product.java (maxLength(category, 255)).
@changelog_1183_li
@changelog_1184_li
R&\#305;dvan A&\#287;ar has completed the Turkish translation of the H2 Console. Thanks a lot!
@changelog_1184_h2
@changelog_1185_h2
Version 1.1.104 (2008-11-28)
@changelog_1185_li
@changelog_1186_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_1186_li
@changelog_1187_li
JaQu: tables are now auto-created when running a query.
@changelog_1187_li
@changelog_1188_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_1188_li
@changelog_1189_li
The function SUM could overflow when using large values. It returns now a data type that is safe.
@changelog_1189_li
@changelog_1190_li
The function AVG could overflow when using large values. Fixed.
@changelog_1190_li
@changelog_1191_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_1191_li
@changelog_1192_li
Build: JAVA_HOME is now automatically detected on Mac OS X.
@changelog_1192_li
@changelog_1193_li
Testing for local connections was very slow on some systems.
@changelog_1193_li
@changelog_1194_li
The cache memory usage calculation is more conservative.
@changelog_1194_li
@changelog_1195_li
Allocating space got slower and slower the larger the database.
@changelog_1195_li
@changelog_1196_li
ALTER TABLE ALTER COLUMN could throw the wrong exception in the last version (Table not found).
@changelog_1196_li
@changelog_1197_li
Updatable result sets: the key columns can now be updated.
@changelog_1197_li
@changelog_1198_li
The H2DatabaseProvider for ActiveObjects is now included in the tools section.
@changelog_1198_li
@changelog_1199_li
The H2Platform for Oracle Toplink Essential has been improved a bit.
@changelog_1199_li
@changelog_1200_li
The Windows service to start H2 didn't work in version 1.1.
@changelog_1200_li
@changelog_1201_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_1201_li
@changelog_1202_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_1202_li
@changelog_1203_li
Compatibility for MS SQL Server DATEDIFF(YYYY, .., ..)
@changelog_1203_li
@changelog_1204_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_1204_li
@changelog_1205_li
The interface CloseListener has a new method 'remove' that is called when the trigger is dropped.
@changelog_1205_li
@changelog_1206_li
Fulltext search: there was a memory leak when creating and dropping fulltext indexes in a loop.
@changelog_1206_h2
@changelog_1207_h2
Version 1.1.103 (2008-11-07)
@changelog_1207_li
@changelog_1208_li
Could not order by a formula when the formula was in the group by list but not in the select list.
@changelog_1208_li
@changelog_1209_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_1209_li
@changelog_1210_li
ALTER TABLE used a lot of memory when using multi-version concurrency.
@changelog_1210_li
@changelog_1211_li
Referential integrity for in-memory databases didn't work in some cases in version 1.1.102.
@changelog_1211_li
@changelog_1212_li
New column INFORMATION_SCHEMA.COLUMNS.SEQUENCE_NAME to get the name of the sequence for auto-increment columns.
@changelog_1212_li
@changelog_1213_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_1213_li
@changelog_1214_li
The Japanese translation has been completed by Masahiro Ikemoto. Thanks a lot!
@changelog_1214_li
@changelog_1215_li
Improved PostgreSQL compatibility for NEXTVAL and CURRVAL.
@changelog_1215_li
@changelog_1216_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_1216_li
@changelog_1217_li
New system property h2.browser to set the browser to use.
@changelog_1217_li
@changelog_1218_li
To start the browser, java.awt.Desktop.browse is now used if available.
@changelog_1218_h2
@changelog_1219_h2
Version 1.1.102 (2008-10-24)
@changelog_1219_li
@changelog_1220_li
The French translation of the H2 Console has been improved by Olivier Parent. Thanks a lot!
@changelog_1220_li
@changelog_1221_li
There was a memory leak when creating and dropping tables and indexes in a loop (persistent database only).
@changelog_1221_li
@changelog_1222_li
SET LOG 2 was not effective if executed after opening the database.
@changelog_1222_li
@changelog_1223_li
Translating the H2 Console is now simpler.
@changelog_1223_li
@changelog_1224_li
Common exception (error code 23*) are no longer written to the .trace.db file by default.
@changelog_1224_li
@changelog_1225_li
In-memory databases don't write LOBs to files any longer.
@changelog_1225_li
@changelog_1226_li
Self referencing constraints didn't restrict deleting rows that reference itself if there is another row that references it.
@changelog_1226_li
@changelog_1227_li
ResultSetMetaData.getColumnName now returns the alias name except for columns.
@changelog_1227_li
@changelog_1228_li
Temporary files are now deleted when the database is closed, even if they were not garbage collected so far.
@changelog_1228_h2
@changelog_1229_h2
Version 1.1.101 (2008-10-17)
@changelog_1229_li
@changelog_1230_li
Errors with code 42000 - 42999 are no longer written to the trace file by default.
@changelog_1230_li
@changelog_1231_li
Queries with more than 10 tables are now faster.
@changelog_1231_li
@changelog_1232_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_1232_li
@changelog_1233_li
IF [NOT] EXISTS is supported for named constraints in ALTER TABLE ... ADD/DROP CONSTRAINT.
@changelog_1233_li
@changelog_1234_li
The error messages have been translated to Spanish by Dario V. Fassi. Thanks a lot!
@changelog_1234_li
@changelog_1235_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_1235_li
@changelog_1236_li
Opening large database is now faster.
@changelog_1236_li
@changelog_1237_li
New system property h2.socketConnectTimeout, the timeout in milliseconds to connect to a server. The default is 2000 (2 seconds).
@changelog_1237_li
@changelog_1238_li
The wrong parameters were bound to subqueries with parameters, specially when using IN(SELECT ...) and IN(...).
@changelog_1238_li
@changelog_1239_li
Unset parameters were not detected when the query was re-compiled.
@changelog_1239_li
@changelog_1240_li
New functions ISO_YEAR, ISO_WEEK, ISO_DAY_OF_WEEK. Thanks a lot to Robert Rathsack for implementing those!
@changelog_1240_li
@changelog_1241_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_1241_li
@changelog_1242_li
An out of memory error while deleting or updating many rows could result in a strange exception.
@changelog_1242_li
@changelog_1243_li
Linked tables: compatibility with MS SQL Server has been improved.
@changelog_1243_li
@changelog_1244_li
Renaming tables that have foreign keys with cascade didn't work correctly.
@changelog_1244_li
@changelog_1245_li
The auto-reconnect feature didn't work when using the auto-server mode. Fixed.
@changelog_1245_li
@changelog_1246_li
Fulltext search: new method FT_DROP_INDEX.
@changelog_1246_li
@changelog_1247_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_1247_li
@changelog_1248_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_1248_li
@changelog_1249_li
The default value for MAX_MEMORY_UNDO is now 50000.
@changelog_1249_li
@changelog_1250_li
For alias columns, ResultSetMetaData.getTableName() and getColumnName() now return the real table and column name in the default mode.
@changelog_1250_li
@changelog_1251_li
In SQL scripts created with SCRIPT TO, schemas are now only created if they don't exist yet.
@changelog_1251_li
@changelog_1252_li
After re-connecting to a database, the database event listener (if set) is informed about it.
@changelog_1252_li
@changelog_1253_li
Local temporary tables now support indexes. Thanks a lot to Matt Roy!
@changelog_1253_li
@changelog_1254_li
RUNSCRIPT no longer uses a temporary file.
@changelog_1254_li
@changelog_1255_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_1255_li
@changelog_1256_li
After an automatic re-connect, part of the session state stays (the part that is stored in the SESSION_STATE table).
@changelog_1256_li
@changelog_1257_li
The build didn't work if the directory temp didn't exist before.
@changelog_1257_li
@changelog_1258_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_1258_li
@changelog_1259_li
WHERE .. IN (SELECT ...) could throw a NullPointerException.
@changelog_1259_li
@changelog_1260_li
Improved Glassfish / Toplink support in H2Platform thanks to Marcio Borges from Brazil. Thanks a lot!
@changelog_1260_h2
@changelog_1261_h2
Version 1.1.100 (2008-10-04)
@changelog_1261_li
@changelog_1262_li
In version 1.1, the following system properties are now enabled by default: h2.lobFilesInDirectories, h2.optimizeGroupSorted, h2.optimizeInJoin, h2.shareLinkedConnections
@changelog_1262_li
@changelog_1263_li
The H2 Console tool now works with the JDBC-ODBC bridge.
@changelog_1263_li
@changelog_1264_li
The H2 Console tool now supports command line options to start things separately.
@changelog_1264_li
@changelog_1265_li
Large objects did not work for in-memory databases in server mode in Linux.
@changelog_1265_li
@changelog_1266_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_1266_li
@changelog_1267_li
The h2console.war can now be built using the Java build.
@changelog_1267_li
@changelog_1268_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_1268_li
@changelog_1269_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_1269_li
@changelog_1270_li
CreateCluster: the property 'serverlist' is now called 'serverList'.
@changelog_1270_li
@changelog_1271_li
The ConvertTraceFile tool could not parse some files because the trace mechanism did not encode prepared statement parameters.
@changelog_1271_li
@changelog_1272_li
Databases names can now be one character long (the minimum size used to be 2 characters).
@changelog_1272_h2
@changelog_1273_h2
Version 1.0.79 (2008-09-26)
@changelog_1273_li
@changelog_1274_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_1274_li
@changelog_1275_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_1275_li
@changelog_1276_li
The server tool now displays the correct IP address if networked.
@changelog_1276_li
@changelog_1277_li
Can now start a TCP server with port 0 (automatically select a port).
@changelog_1277_li
@changelog_1278_li
Result sets with just a unique index can now be updated (previously a primary key was required).
@changelog_1278_li
@changelog_1279_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_1279_li
@changelog_1280_li
LINKED TABLE: worked around a bug in Oracle with the CHAR data type.
@changelog_1280_li
@changelog_1281_li
Faster hash code calculation for large binary arrays.
@changelog_1281_li
@changelog_1282_li
Faster storage re-use algorithm thanks to Greg Dhuse from cleversafe.com.
@changelog_1282_li
@changelog_1283_li
The database supports the SHOW command for better MySQL and PostgreSQL compatibility.
@changelog_1283_li
@changelog_1284_li
The H2 Console now abbreviates large texts in results.
@changelog_1284_li
@changelog_1285_li
Multiple UNION queries could not be used in derived tables.
@changelog_1285_li
@changelog_1286_li
Linked tables can now be read-only.
@changelog_1286_li
@changelog_1287_li
Temporary linked tables are now supported.
@changelog_1287_li
@changelog_1288_li
It was possible to create tables in read-only databases.
@changelog_1288_li
@changelog_1289_li
SET SCHEMA_SEARCH_PATH is now documented.
@changelog_1289_li
@changelog_1290_li
SET SCHEMA did not work for views.
@changelog_1290_li
@changelog_1291_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_1291_li
@changelog_1292_li
The maximum log file size setting was ignored for large databases.
@changelog_1292_li
@changelog_1293_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_1293_li
@changelog_1294_li
The data type JAVA_OBJECT could not be used in updatable result sets.
@changelog_1294_li
@changelog_1295_li
The system property h2.optimizeInJoin did not work correctly.
@changelog_1295_li
@changelog_1296_li
Conditions such as ID=? AND ID>? were slow.
@changelog_1296_h2
@changelog_1297_h2
Version 1.0.78 (2008-08-28)
@changelog_1297_li
@changelog_1298_li
The documentation no longer uses a frameset (except the Javadocs).
@changelog_1298_li
@changelog_1299_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_1299_li
@changelog_1300_li
Java methods with variable number of parameters can now be used (for Java 1.5 or newer).
@changelog_1300_li
@changelog_1301_li
The Japanese translation has been improved by Masahiro Ikemoto. Thanks a lot!
@changelog_1301_li
@changelog_1302_li
The H2 Console replaced an empty user name with a single space.
@changelog_1302_li
@changelog_1303_li
The build target 'build jarSmall' now includes the embedded database.
@changelog_1303_li
@changelog_1304_li
JdbcDataSource now keeps the password in a char array where possible.
@changelog_1304_li
@changelog_1305_li
ResultSet.absolute did not always work with large result sets.
@changelog_1305_li
@changelog_1306_li
Column aliases can now be used in GROUP BY and HAVING.
@changelog_1306_li
@changelog_1307_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_1307_h2
@changelog_1308_h2
Version 1.0.77 (2008-08-16)
@changelog_1308_li
@changelog_1309_li
JaQu is now using prepared statements and supports Date, Time, Timestamp.
@changelog_1309_li
@changelog_1310_li
When using remote in-memory databases, large LOB objects did not work.
@changelog_1310_li
@changelog_1311_li
Timestamp columns such as TIMESTAMP(6) were not compatible to other database.
@changelog_1311_li
@changelog_1312_li
Opening a large database was slow if there was a problem opening the previous time.
@changelog_1312_li
@changelog_1313_li
NOT IN(SELECT ...) was incorrect if the subquery returns no rows.
@changelog_1313_li
@changelog_1314_li
CREATE TABLE AS SELECT did not work correctly in the multi-version concurrency mode.
@changelog_1314_li
@changelog_1315_li
Support a comma before closing a list, as in: create table test(id int,)
@changelog_1315_li
@changelog_1316_li
MySQL compatibility: linked tables had lower case column names on some systems.
@changelog_1316_li
@changelog_1317_li
DB2 compatibility: the DB2 fetch-first-clause is supported.
@changelog_1317_li
@changelog_1318_li
Oracle compatibility: old style outer join syntax using (+) did work correctly sometimes.
@changelog_1318_li
@changelog_1319_li
ResultSet.setFetchSize is now supported.
@changelog_1319_li
@changelog_1320_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_1320_h2
@changelog_1321_h2
Version 1.0.76 (2008-07-27)
@changelog_1321_li
@changelog_1322_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_1322_li
@changelog_1323_li
Invalid database names are now detected and a better error message is thrown.
@changelog_1323_li
@changelog_1324_li
ResultSetMetaData.getColumnClassName now returns the correct class name for BLOB and CLOB.
@changelog_1324_li
@changelog_1325_li
Fixed the Oracle mode: Oracle allows multiple rows only where all columns of the unique index are NULL.
@changelog_1325_li
@changelog_1326_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_1326_li
@changelog_1327_li
ORDER BY on tableName.columnName didn't work correctly if the column name was also used as an alias.
@changelog_1327_li
@changelog_1328_li
H2 Console: the progress display when opening a database has been improved.
@changelog_1328_li
@changelog_1329_li
The error message when the server doesn't start has been improved.
@changelog_1329_li
@changelog_1330_li
Key values can now be changed in updatable result sets.
@changelog_1330_li
@changelog_1331_li
Changes in updatable result sets are now visible even when resetting the result set.
@changelog_1331_li
@changelog_1332_li
Temporary files were sometimes deleted too late when executing large insert, update, or delete operations.
@changelog_1332_li
@changelog_1333_li
The database file was growing after deleting many rows, and after large update operations.
@download_1000_h1
...
...
@@ -7604,1218 +7607,1206 @@ Page store: new storage mechanism
[Requires page store] Shutdown compact
@roadmap_1007_li
Optimize IN(...) for SELECT, DELETE, and UPDATE.
@roadmap_1008_li
More tests with MULTI_THREADED=1
@roadmap_1009_li
@roadmap_1008_li
RECOVER=1 should automatically recover, =2 should run the recovery tool if required
@roadmap_1010_li
@roadmap_1009_li
Optimization: result set caching (like MySQL)
@roadmap_1011_li
@roadmap_1010_li
Server side cursors
@roadmap_1012_h2
@roadmap_1011_h2
Priority 2
@roadmap_1013_li
@roadmap_1012_li
Improve test code coverage
@roadmap_1014_li
@roadmap_1013_li
Procedural language / script language (Java, Javascript)
@roadmap_1015_li
@roadmap_1014_li
Fulltext search: support streaming CLOB data.
@roadmap_1015_li
Optimize ID=? OR ID=? to ID IN(?, ?) or UNION if the cost is lower
@roadmap_1016_li
Optimize .. OR .. to IN(..) or UNION if the cost is lower
Enable warning for 'Local variable declaration hides another field or variable'.
@roadmap_1017_li
Enable warning for 'Local variable declaration hides another field or variable'.
Test multi-threaded in-memory db access
@roadmap_1018_li
Test multi-threaded in-memory db access
MVCC: select for update should only lock the selected rows.
@roadmap_1019_li
MVCC: select for update should only lock the selected rows.
Option to shutdown all the running servers (on the same VM).
@roadmap_1020_li
Option to shutdown all the running servers (on the same VM).
Index organized tables CREATE TABLE...(...) ORGANIZATION INDEX (store in data file) (probably file format changes are required for rowId)
@roadmap_1021_li
Optimize ID=? OR ID=?: convert to IN(...)
[Requires page store] Better space re-use in the files after deleting data: shrink the data file without closing the database (if the end of the file is empty)
@roadmap_1022_li
Index organized tables CREATE TABLE...(...) ORGANIZATION INDEX (store in data file) (probably file format changes are required for rowId)
Full outer joins
@roadmap_1023_li
[Requires page store] Better space re-use in the files after deleting data: shrink the data file without closing the database (if the end of the file is empty)
Implement INSTEAD OF trigger (for views, tables, metadata tables).
@roadmap_1024_li
Implement INSTEAD OF trigger (for views, tables, metadata tables).
Support triggers for INFORMATION_SCHEMA tables (to better support PostgreSQL catalog: rebuild after creating new tables)
@roadmap_1025_li
Triggers for metadata tables; use for PostgreSQL catalog
Use triggers for metadata tables; use for PostgreSQL catalog
@roadmap_1026_li
Support triggers for INFORMATION_SCHEMA tables (to better support PostgreSQL catalog: rebuild after creating new tables)
Maven: deploy / upload h2..-sources.jar and javadocs as well.
@roadmap_1027_li
Full outer joins
Test very large databases and LOBs (up to 256 GB)
@roadmap_1028_li
Maven: deploy / upload h2..-sources.jar and javadocs as well.
Support hints for the optimizer (which index to use, enforce the join order).
@roadmap_1029_li
Support trigger on the tables information_schema.tables and ...columns
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_1030_li
Test very large databases and LOBs (up to 256 GB)
Clustering: recovery needs to becomes fully automatic. Global write lock feature.
@roadmap_1031_li
Support hints for the optimizer (which index to use, enforce the join order).
Support mixed clustering mode (one embedded, the other server mode)
@roadmap_1032_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)
Sequence: add features [NO] MINVALUE, MAXVALUE, CYCLE
@roadmap_1033_li
Clustering: recovery needs to becomes fully automatic. Global write lock feature.
Linked schema using CSV files: one schema for a directory of files; support indexes for CSV files
Include SMPT (mail) server (at least client) (alert on cluster failure, low disk space,...)
@roadmap_1071_li
iReport to support H2
Drop with restrict (currently cascade is the default)
@roadmap_1072_li
Implement missing JDBC API (CallableStatement,...)
JSON parser and functions
@roadmap_1073_li
Compression of the cache
Automatic collection of statistics (auto ANALYZE)
@roadmap_1074_li
Include SMPT (mail) server (at least client) (alert on cluster failure, low disk space,...)
Server: client ping from time to time (to avoid timeout - is timeout a problem?)
@roadmap_1075_li
Drop with restrict (currently cascade is the default)
Copy database: tool with config GUI and batch mode, extensible (example: compare)
@roadmap_1076_li
JSON parser and functions
Document, implement tool for long running transactions using user-defined compensation statements.
@roadmap_1077_li
Automatic collection of statistics (auto ANALYZE)
Support SET TABLE DUAL READONLY
@roadmap_1078_li
Server: client ping from time to time (to avoid timeout - is timeout a problem?)
GCJ: what is the state now?
@roadmap_1079_li
Copy database: tool with config GUI and batch mode, extensible (example: compare)
Events for: database Startup, Connections, Login attempts, Disconnections, Prepare (after parsing), Web Server (see http://docs.openlinksw.com/virtuoso/fn_dbev_startup.html)
@roadmap_1080_li
Document, implement tool for long running transactions using user-defined compensation statements.
Optimization: log compression
@roadmap_1081_li
Support SET TABLE DUAL READONLY
ROW_NUMBER() OVER([ORDER BY columnName])
@roadmap_1082_li
GCJ: what is the state now?
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_1083_li
Events for: database Startup, Connections, Login attempts, Disconnections, Prepare (after parsing), Web Server (see http://docs.openlinksw.com/virtuoso/fn_dbev_startup.html)
Compatibility: in MySQL, HSQLDB, /0.0 is NULL; in PostgreSQL, Derby: division by zero
@roadmap_1084_li
Optimization: log compression
Functional tables should accept parameters from other tables (see FunctionMultiReturn) SELECT * FROM TEST T, P2C(T.A, T.R)
@roadmap_1085_li
ROW_NUMBER() OVER([ORDER BY columnName])
Custom class loader to reload functions on demand
@roadmap_1086_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)
Test http://mysql-je.sourceforge.net/
@roadmap_1087_li
Compatibility: in MySQL, HSQLDB, /0.0 is NULL; in PostgreSQL, Derby: division by zero
Close all files when closing the database (including LOB files that are open on the client side)
@roadmap_1088_li
Functional tables should accept parameters from other tables (see FunctionMultiReturn) SELECT * FROM TEST T, P2C(T.A, T.R)
EXE file: maybe use http://jsmooth.sourceforge.net
@roadmap_1089_li
Custom class loader to reload functions on demand
Performance: automatically build in-memory indexes if the whole table is in memory
@roadmap_1090_li
Test http://mysql-je.sourceforge.net/
H2 Console: the webclient could support more features like phpMyAdmin.
@roadmap_1091_li
Close all files when closing the database (including LOB files that are open on the client side)
Use Janino to convert Java to C++
@roadmap_1092_li
EXE file: maybe use http://jsmooth.sourceforge.net
The HELP information schema can be directly exposed in the Console
@roadmap_1093_li
Performance: automatically build in-memory indexes if the whole table is in memory
Maybe use the 0x1234 notation for binary fields, see MS SQL Server
@roadmap_1094_li
H2 Console: the webclient could support more features like phpMyAdmin.
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_1095_li
Use Janino to convert Java to C++
SQL Server 2005, Oracle: support COUNT(*) OVER(). See http://www.orafusion.com/art_anlytc.htm
@roadmap_1096_li
The HELP information schema can be directly exposed in the Console
RANK() and DENSE_RANK(), Partition using OVER()
@roadmap_1097_li
Maybe use the 0x1234 notation for binary fields, see MS SQL Server
Max memory rows / max undo log size: use block count / row size not row count
@roadmap_1102_li
Version column (number/sequence and timestamp based)
Support 123L syntax as in Java; example: SELECT (2000000000*2)
@roadmap_1103_li
Optimize getGeneratedKey: send last identity after each execute (server).
Implement point-in-time recovery
@roadmap_1104_li
Test and document UPDATE TEST SET (ID, NAME) = (SELECT ID*10, NAME || '!' FROM TEST T WHERE T.ID=TEST.ID);
LIKE: improved version for larger texts (currently using naive search)
@roadmap_1105_li
Max memory rows / max undo log size: use block count / row size not row count
Automatically convert to the next 'higher' data type whenever there is an overflow.
@roadmap_1106_li
Support 123L syntax as in Java; example: SELECT (2000000000*2)
Throw an exception when the application calls getInt on a Long (optional)
@roadmap_1107_li
Implement point-in-time recovery
Default date format for input and output (local date constants)
@roadmap_1108_li
LIKE: improved version for larger texts (currently using naive search)
Support custom Collators
@roadmap_1109_li
Automatically convert to the next 'higher' data type whenever there is an overflow.
@roadmap_1110_li
Throw an exception when the application calls getInt on a Long (optional)
@roadmap_1111_li
Default date format for input and output (local date constants)
@roadmap_1112_li
Support custom Collators
@roadmap_1113_li
Document ROWNUM usage for reports: SELECT ROWNUM, * FROM (subquery)
@roadmap_1114_li
@roadmap_1110_li
Clustering: reads should be randomly distributed or to a designated database on RAM
@roadmap_1115_li
@roadmap_1111_li
Clustering: when a database is back alive, automatically synchronize with the master
@roadmap_1116_li
@roadmap_1112_li
Standalone tool to get relevant system properties and add it to the trace output.
@roadmap_1117_li
@roadmap_1113_li
Support 'call proc(1=value)' (PostgreSQL, Oracle)
@roadmap_1118_li
@roadmap_1114_li
JAMon (proxy jdbc driver)
@roadmap_1119_li
@roadmap_1115_li
Console: improve editing data (Tab, Shift-Tab, Enter, Up, Down, Shift+Del?)
@roadmap_1120_li
@roadmap_1116_li
Console: autocomplete Ctrl+Space inserts template
@roadmap_1121_li
@roadmap_1117_li
Simplify translation ('Donate a translation')
@roadmap_1122_li
@roadmap_1118_li
Option to encrypt .trace.db file
@roadmap_1123_li
@roadmap_1119_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
@roadmap_1124_li
@roadmap_1120_li
Functions with unknown return or parameter data types: serialize / deserialize
@roadmap_1125_li
@roadmap_1121_li
Test if idle TCP connections are closed, and how to disable that
@roadmap_1126_li
@roadmap_1122_li
Try using a factory for Row, Value[] (faster?), http://javolution.org/, alternative ObjectArray / IntArray
@roadmap_1127_li
@roadmap_1123_li
Auto-Update feature for database, .jar file
@roadmap_1128_li
@roadmap_1124_li
ResultSet SimpleResultSet.readFromURL(String url): id varchar, state varchar, released timestamp
@roadmap_1129_li
@roadmap_1125_li
Partial indexing (see PostgreSQL)
@roadmap_1130_li
@roadmap_1126_li
The build should fail if the test fails
@roadmap_1131_li
@roadmap_1127_li
Add GUI to build a custom version (embedded, fulltext,...) using build flags
@roadmap_1132_li
@roadmap_1128_li
http://rubyforge.org/projects/hypersonic/
@roadmap_1133_li
@roadmap_1129_li
Add comparator (x === y) : (x = y or (x is null and y is null))
@roadmap_1134_li
@roadmap_1130_li
Try to create trace file even for read only databases
@roadmap_1135_li
@roadmap_1131_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)
@roadmap_1136_li
@roadmap_1132_li
Count on a column that can not be null could be optimized to COUNT(*)
@roadmap_1137_li
@roadmap_1133_li
Table order: ALTER TABLE TEST ORDER BY NAME DESC (MySQL compatibility)
@roadmap_1138_li
@roadmap_1134_li
Backup tool should work with other databases as well
@roadmap_1139_li
@roadmap_1135_li
Console: -ifExists doesn't work for the console. Add a flag to disable other dbs
@roadmap_1140_li
@roadmap_1136_li
Performance: update in-place
@roadmap_1141_li
@roadmap_1137_li
Check if 'FSUTIL behavior set disablelastaccess 1' improves the performance (fsutil behavior query disablelastaccess)
Implement Clob / Blob truncate and the remaining functionality
@roadmap_1146_li
@roadmap_1142_li
Maybe close LOBs after closing connection
@roadmap_1147_li
@roadmap_1143_li
Tree join functionality
@roadmap_1148_li
@roadmap_1144_li
Support alter table add column if table has views defined
@roadmap_1149_li
@roadmap_1145_li
Add multiple columns at the same time with ALTER TABLE .. ADD .. ADD ..
@roadmap_1150_li
@roadmap_1146_li
Add H2 to Gem (Ruby install system)
@roadmap_1151_li
@roadmap_1147_li
API for functions / user tables
@roadmap_1152_li
@roadmap_1148_li
Order conditions inside AND / OR to optimize the performance
@roadmap_1153_li
@roadmap_1149_li
Support linked JCR tables
@roadmap_1154_li
@roadmap_1150_li
Make sure H2 is supported by Execute Query: http://executequery.org/
@roadmap_1155_li
@roadmap_1151_li
Read InputStream when executing, as late as possible (maybe only embedded mode). Problem with re-execute.
@roadmap_1156_li
@roadmap_1152_li
Native fulltext search: min word length; store word positions
@roadmap_1157_li
@roadmap_1153_li
Store dates in local time zone (portability of database files)
@roadmap_1158_li
@roadmap_1154_li
Recursive Queries (see details)
@roadmap_1159_li
@roadmap_1155_li
Add an option to the SCRIPT command to generate only portable / standard SQL
@roadmap_1160_li
@roadmap_1156_li
Test Dezign for Databases (http://www.datanamic.com)
@roadmap_1161_li
@roadmap_1157_li
Fast library for parsing / formatting: http://javolution.org/
@roadmap_1162_li
@roadmap_1158_li
Updatable Views (simple cases first)
@roadmap_1163_li
@roadmap_1159_li
Improve create index performance
@roadmap_1164_li
@roadmap_1160_li
Implement more JDBC 4.0 features
@roadmap_1165_li
@roadmap_1161_li
Support TRANSFORM / PIVOT as in MS Access
@roadmap_1166_li
@roadmap_1162_li
SELECT * FROM (VALUES (...), (...), ....) AS alias(f1, ...)
@roadmap_1167_li
@roadmap_1163_li
Support updatable views with join on primary keys (to extend a table)
@roadmap_1168_li
@roadmap_1164_li
Public interface for functions (not public static)
@roadmap_1169_li
@roadmap_1165_li
Autocomplete: if I type the name of a table that does not exist (should say: syntax not supported)
@roadmap_1170_li
@roadmap_1166_li
Document FTP server, including -ftpTask option to execute / kill remote processes
@roadmap_1171_li
@roadmap_1167_li
Eliminate undo log records if stored on disk (just one pointer per block, not per record)
@roadmap_1172_li
@roadmap_1168_li
Feature matrix like in <a href="http://www.inetsoftware.de/products/jdbc/mssql/features/default.asp">i-net software</a> .
@roadmap_1173_li
@roadmap_1169_li
Updatable result set on table without primary key or unique index
@roadmap_1174_li
@roadmap_1170_li
Use LinkedList instead of ArrayList where applicable
@roadmap_1175_li
@roadmap_1171_li
Optimizer: use an index for IS NULL and IS NOT NULL (including linked tables). ID IS NOT NULL could be converted to ID >= Integer.MIN_VALUE.
@roadmap_1176_li
@roadmap_1172_li
Support % operator (modulo)
@roadmap_1177_li
@roadmap_1173_li
Support 1+'2'=3, '1'+'2'='12' (MS SQL Server compatibility)
@roadmap_1178_li
@roadmap_1174_li
Support nested transactions
@roadmap_1179_li
@roadmap_1175_li
Add a benchmark for big databases, and one for many users
@roadmap_1180_li
@roadmap_1176_li
Compression in the result set (repeating values in the same column) over TCP/IP
@roadmap_1181_li
@roadmap_1177_li
Support curtimestamp (like curtime, curdate)
@roadmap_1182_li
@roadmap_1178_li
Support ANALYZE {TABLE|INDEX} tableName COMPUTE|ESTIMATE|DELETE STATISTICS ptnOption options
@roadmap_1183_li
@roadmap_1179_li
Support Sequoia (Continuent.org)
@roadmap_1184_li
@roadmap_1180_li
Dynamic length numbers / special methods for DataPage.writeByte / writeShort / Ronni Nielsen
@roadmap_1185_li
@roadmap_1181_li
Pluggable ThreadPool, (AvalonDB / deebee / Paul Hammant)
@roadmap_1186_li
@roadmap_1182_li
Release locks (shared or exclusive) on demand
@roadmap_1187_li
@roadmap_1183_li
Support OUTER UNION
@roadmap_1188_li
@roadmap_1184_li
Support parameterized views (similar to CSVREAD, but using just SQL for the definition)
@roadmap_1189_li
@roadmap_1185_li
A way (JDBC driver) to map an URL (jdbc:h2map:c1) to a connection object
@roadmap_1190_li
@roadmap_1186_li
Option for SCRIPT to only process one or a set of tables, and append to a file
@roadmap_1191_li
@roadmap_1187_li
Support linked tables to the current database
@roadmap_1192_li
@roadmap_1188_li
Support dynamic linked schema (automatically adding/updating/removing tables)
@roadmap_1193_li
@roadmap_1189_li
Compatibility with Derby: VALUES(1), (2); SELECT * FROM (VALUES (1), (2)) AS myTable(c1)
@roadmap_1194_li
@roadmap_1190_li
Compatibility: # is the start of a single line comment (MySQL) but date quote (Access). Mode specific
@roadmap_1195_li
@roadmap_1191_li
Run benchmarks with JDK 1.5, JDK 1.6, java -server
@roadmap_1196_li
@roadmap_1192_li
Optimizations: faster hash function for strings, byte arrays
@roadmap_1197_li
@roadmap_1193_li
DatabaseEventListener: callback for all operations (including expected time, RUNSCRIPT) and cancel functionality
@roadmap_1198_li
@roadmap_1194_li
H2 Console / large result sets: use 'streaming' instead of building the page in-memory
@roadmap_1199_li
@roadmap_1195_li
Benchmark: add a graph to show how databases scale (performance/database size)
@roadmap_1200_li
@roadmap_1196_li
Implement a SQLData interface to map your data over to a custom object
@roadmap_1201_li
@roadmap_1197_li
In the MySQL and PostgreSQL mode, use lower case identifiers by default (DatabaseMetaData.storesLowerCaseIdentifiers = true)
@roadmap_1202_li
@roadmap_1198_li
Allow execution time prepare for SELECT * FROM CSVREAD(?, 'columnNameString')
@roadmap_1203_li
@roadmap_1199_li
Support multiple directories (on different hard drives) for the same database
@roadmap_1204_li
@roadmap_1200_li
Server protocol: use challenge response authentication, but client sends hash(user+password) encrypted with response
@roadmap_1205_li
@roadmap_1201_li
Support EXEC[UTE] (doesn't return a result set, compatible to MS SQL Server)
@roadmap_1206_li
@roadmap_1202_li
Support native XML data type
@roadmap_1207_li
@roadmap_1203_li
Support triggers with a string property or option: SpringTrigger, OSGITrigger
@roadmap_1208_li
@roadmap_1204_li
Clustering: adding a node should be very fast and without interrupting clients (very short lock)
@roadmap_1209_li
@roadmap_1205_li
Support materialized views (using triggers)
@roadmap_1210_li
@roadmap_1206_li
Ability to resize the cache array when resizing the cache
@roadmap_1211_li
@roadmap_1207_li
Time based cache writing (one second after writing the log)
@roadmap_1212_li
@roadmap_1208_li
Check state of H2 driver for DDLUtils: https://issues.apache.org/jira/browse/DDLUTILS-185
@roadmap_1213_li
@roadmap_1209_li
Support JMX: create an MBean for each database and server (support JConsole). See http://thedevcloud.blogspot.com/2008/10/displaying-hsql-database-manager-in.html http://java.sun.com/j2se/1.5.0/docs/api/java/lang/management/ManagementFactory.html#getPlatformMBeanServer() http://java.sun.com/j2se/1.5.0/docs/guide/management/agent.html
@roadmap_1214_li
@roadmap_1210_li
Index usage for REGEXP LIKE.
@roadmap_1215_li
@roadmap_1211_li
Compatibility: add a role DBA (like ADMIN).
@roadmap_1216_li
@roadmap_1212_li
Better support multiple processors for in-memory databases.
@roadmap_1217_li
@roadmap_1213_li
Access rights: remember the owner of an object. COMMENT: allow owner of object to change it.
@roadmap_1218_li
@roadmap_1214_li
Access rights: finer grained access control (grant access for specific functions)
@roadmap_1219_li
@roadmap_1215_li
Support N'text'
@roadmap_1220_li
@roadmap_1216_li
Support SCOPE_IDENTITY() to avoid problems when inserting rows in a trigger
@roadmap_1221_li
@roadmap_1217_li
Set a connection read only (Connection.setReadOnly)
@roadmap_1222_li
@roadmap_1218_li
In MySQL mode, for AUTO_INCREMENT columns, don't set the primary key
@roadmap_1223_li
@roadmap_1219_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).
@roadmap_1224_li
@roadmap_1220_li
Support compatibility for jdbc:hsqldb:res:
@roadmap_1225_li
@roadmap_1221_li
Provide an Java SQL builder with standard and H2 syntax
@roadmap_1226_li
@roadmap_1222_li
Trace: write OS, file system, JVM,... when opening the database
@roadmap_1227_li
@roadmap_1223_li
Support indexes for views (probably requires materialized views)
@roadmap_1228_li
@roadmap_1224_li
Document SET SEARCH_PATH, BEGIN, EXECUTE, parameters
@roadmap_1229_li
@roadmap_1225_li
Browser: use Desktop.isDesktopSupported and browse when using JDK 1.6
@roadmap_1230_li
@roadmap_1226_li
Server: use one listener (detect if the request comes from an PG or TCP client)
@roadmap_1231_li
@roadmap_1227_li
Store dates as 'local'. Existing files use GMT. Use escape syntax for compatibility.
@roadmap_1232_li
@roadmap_1228_li
Support data type INTERVAL
@roadmap_1233_li
@roadmap_1229_li
Optimize SELECT MIN(ID), MAX(ID), COUNT(*) FROM TEST WHERE ID BETWEEN 100 AND 200
@roadmap_1234_li
@roadmap_1230_li
Support Oracle functions: TRUNC, NVL2, TO_CHAR, TO_DATE, TO_NUMBER
Does the FTP server has problems with multithreading?
@roadmap_1260_li
@roadmap_1256_li
Write an article about SQLInjection (h2\src\docsrc\html\images\SQLInjection.txt)
@roadmap_1261_li
@roadmap_1257_li
Convert SQL-injection-2.txt to html document, include SQLInjection.java sample
@roadmap_1262_li
@roadmap_1258_li
Improve LOB in directories performance
@roadmap_1263_li
@roadmap_1259_li
Web site design: http://www.igniterealtime.org/projects/openfire/index.jsp
@roadmap_1264_li
@roadmap_1260_li
HSQLDB compatibility: Openfire server uses: CREATE SCHEMA PUBLIC AUTHORIZATION DBA; CREATE USER SA PASSWORD ""; GRANT DBA TO SA; SET SCHEMA PUBLIC
@roadmap_1265_li
@roadmap_1261_li
Translation: use ?? in help.csv
@roadmap_1266_li
@roadmap_1262_li
Translated .pdf
@roadmap_1267_li
@roadmap_1263_li
Cluster: hot deploy (adding a node at runtime)
@roadmap_1268_li
@roadmap_1264_li
MySQL compatibility: update test1 t1, test2 t2 set t1.id = t2.id where t1.id = t2.id;
@roadmap_1269_li
@roadmap_1265_li
Recovery tool: bad blocks should be converted to INSERT INTO SYSTEM_ERRORS(...), and things should go into the .trace.db file
@roadmap_1270_li
@roadmap_1266_li
RECOVER=2 to backup the database, run recovery, open the database
@roadmap_1271_li
@roadmap_1267_li
Recovery should work with encrypted databases
@roadmap_1272_li
@roadmap_1268_li
Corruption: new error code, add help
@roadmap_1273_li
@roadmap_1269_li
Space reuse: after init, scan all storages and free those that don't belong to a live database object
@roadmap_1274_li
@roadmap_1270_li
SysProperties: change everything to H2_...
@roadmap_1275_li
@roadmap_1271_li
Use FilterIn / FilterOut putStream?
@roadmap_1276_li
@roadmap_1272_li
Access rights: add missing features (users should be 'owner' of objects; missing rights for sequences; dropping objects)
@roadmap_1277_li
@roadmap_1273_li
Support NOCACHE table option (Oracle)
@roadmap_1278_li
@roadmap_1274_li
Support table partitioning.
@roadmap_1279_li
@roadmap_1275_li
Index usage for UPDATE ... WHERE .. IN (SELECT...)
@roadmap_1280_li
@roadmap_1276_li
Add regular javadocs (using the default doclet, but another css) to the homepage.
@roadmap_1281_li
@roadmap_1277_li
The database should be kept open for a longer time when using the server mode.
@roadmap_1282_li
@roadmap_1278_li
Javadocs: for each tool, add a copy & paste sample in the class level.
@roadmap_1283_li
@roadmap_1279_li
Javadocs: add @author tags.
@roadmap_1284_li
@roadmap_1280_li
Fluent API for tools: Server.createTcpServer().setPort(9081).setPassword(password).start();
@roadmap_1285_li
@roadmap_1281_li
MySQL compatibility: real SQL statement for DESCRIBE TEST
@roadmap_1286_li
@roadmap_1282_li
Use a default delay of 1 second before closing a database.
@roadmap_1287_li
@roadmap_1283_li
Write (log) to system table before adding to internal data structures.
@roadmap_1288_li
@roadmap_1284_li
Support very large deletes and updates.
@roadmap_1289_li
@roadmap_1285_li
Doclet (javadocs): constructors are not listed.
@roadmap_1290_li
@roadmap_1286_li
Support direct lookup for MIN and MAX when using WHERE (see todo.txt / Direct Lookup).
@roadmap_1291_li
@roadmap_1287_li
Support other array types (String[], double[]) in PreparedStatement.setObject(int, Object);
@roadmap_1292_li
@roadmap_1288_li
MVCC should not be memory bound (uncommitted data is kept in memory in the delta index; maybe using a regular b-tree index solves the problem).
@roadmap_1293_li
@roadmap_1289_li
Oracle compatibility: support NLS_DATE_FORMAT.
@roadmap_1294_li
@roadmap_1290_li
Support flashback queries as in Oracle.
@roadmap_1295_li
@roadmap_1291_li
Import / Export of fixed with text files.
@roadmap_1296_li
@roadmap_1292_li
Support OUT parameters in user-defined procedures.
@roadmap_1297_li
@roadmap_1293_li
Support getGeneratedKeys to return multiple rows when used with batch updates. This is supported by MySQL, but not Derby. Both PostgreSQL and HSQLDB don't support getGeneratedKeys. Also support it when using INSERT ... SELECT.
@roadmap_1298_li
@roadmap_1294_li
HSQLDB compatibility: automatic data type for SUM if value is the value is too big (by default use the same type as the data).
@roadmap_1299_li
@roadmap_1295_li
Improve the optimizer to select the right index for special cases: where id between 2 and 4 and booleanColumn
@roadmap_1300_li
@roadmap_1296_li
Linked tables: make hidden columns available (Oracle: rowid and ora_rowscn columns).
@roadmap_1301_li
@roadmap_1297_li
Support merge join.
@roadmap_1302_li
@roadmap_1298_li
H2 Console: in-place autocomplete.
@roadmap_1303_li
@roadmap_1299_li
Oracle: support DECODE method (convert to CASE WHEN).
@roadmap_1304_li
@roadmap_1300_li
Support large databases: split LOB (BLOB, CLOB) to multiple directories / disks (similar to tablespaces).
@roadmap_1305_li
@roadmap_1301_li
Support to assign a primary key index a user defined name.
@roadmap_1306_li
@roadmap_1302_li
Cluster: add feature to make sure cluster nodes can not get out of sync (for example by stopping one process).
@roadmap_1307_li
@roadmap_1303_li
H2 Console: support configuration option for fixed width (monospace) font.
@roadmap_1308_li
@roadmap_1304_li
Native fulltext search: support analyzers (specially for Chinese, Japanese).
@roadmap_1309_li
@roadmap_1305_li
Automatically compact databases from time to time (as a background process).
@roadmap_1310_li
@roadmap_1306_li
Support SCOPE_IDENTITY().
@roadmap_1311_li
@roadmap_1307_li
Support GRANT SELECT, UPDATE ON *.
@roadmap_1312_li
@roadmap_1308_li
Test Eclipse DTP.
@roadmap_1313_li
@roadmap_1309_li
Pure SQL triggers (example: update parent table if the child table is changed).
@roadmap_1314_li
@roadmap_1310_li
H2 Console: autocomplete: keep the previous setting
@roadmap_1315_li
@roadmap_1311_li
MySQL, MS SQL Server compatibility: support case sensitive (mixed case) identifiers without quotes.
@roadmap_1316_li
@roadmap_1312_li
executeBatch: option to stop at the first failed statement.
@roadmap_1317_li
@roadmap_1313_li
Implement OLAP features as described here: http://www.devx.com/getHelpOn/10MinuteSolution/16573/0/page/5
@roadmap_1318_li
@roadmap_1314_li
Support Oracle ROWID (unique identifier for each row).
@roadmap_1319_li
@roadmap_1315_li
Server mode: improve performance for batch updates.
@roadmap_1320_li
@roadmap_1316_li
Applets: support read-only databases in a zip file (accessed as a resource).
@roadmap_1321_li
@roadmap_1317_li
Long running queries / errors / trace system table.
@roadmap_1322_li
@roadmap_1318_li
H2 Console should support JaQu directly.
@roadmap_1323_li
@roadmap_1319_li
H2 Console: support single file upload and directory download (optional).
@roadmap_1324_li
@roadmap_1320_li
Document FTL_SEARCH, FTL_SEARCH_DATA.
@roadmap_1325_li
@roadmap_1321_li
Sequences: CURRVAL should be session specific. Compatibility with PostgreSQL.
@roadmap_1326_li
@roadmap_1322_li
Support DatabaseMetaData.insertsAreDetected: updatable result sets should detect inserts.
@roadmap_1327_li
@roadmap_1323_li
Auto-server: add option to define the IP address range or list.
@roadmap_1328_li
@roadmap_1324_li
Index creation only using deterministic functions.
@roadmap_1329_li
@roadmap_1325_li
Use http://recaptcha.net somehow to secure the Google Group.
@roadmap_1330_li
@roadmap_1326_li
Support DELETE with TOP or LIMIT. See also: http://dev.mysql.com/doc/refman/5.1/de/delete.html
@roadmap_1331_li
@roadmap_1327_li
Change the default for NULL || 'x' to return NULL
@roadmap_1332_li
@roadmap_1328_li
ANALYZE: use a bloom filter for each indexed column to estimate count of distinct values.
@roadmap_1333_li
@roadmap_1329_li
ANALYZE: for unique indexes that allow null, count the number of null.
@roadmap_1334_li
@roadmap_1330_li
AUTO_SERVER: support changing IP addresses (disable a network while the database is open).
@roadmap_1335_li
@roadmap_1331_li
Avoid using java.util.Calendar internally because it's slow, complicated, and seems to be buggy.
@roadmap_1336_li
@roadmap_1332_li
Support TRUNCATE .. CASCADE like PostgreSQL.
@roadmap_1337_li
@roadmap_1333_li
Support opening a database that is in the classpath, maybe using a new file system.
@roadmap_1338_li
@roadmap_1334_li
Fulltext search: lazy result generation using SimpleRowSource.
@roadmap_1339_li
@roadmap_1335_li
Support transformation to join for user defined functions, as for IN(SELECT...).
@roadmap_1340_li
@roadmap_1336_li
Fulltext search: support alternative syntax: WHERE FTL_CONTAINS(name, 'hello').
@roadmap_1341_li
@roadmap_1337_li
MySQL compatibility: support REPLACE, see http://dev.mysql.com/doc/refman/5.1/de/replace.html
@roadmap_1342_li
@roadmap_1338_li
MySQL compatibility: support INSERT INTO table SET column1 = value1, column2 = value2
@roadmap_1343_li
@roadmap_1339_li
Docs: add a one line description for each functions and SQL statements at the top (in the link section).
@roadmap_1344_li
@roadmap_1340_li
Javadoc search: weight for titles should be higher ('random' should list Functions as the best match).
@roadmap_1345_li
@roadmap_1341_li
Replace information_schema tables with regular tables that are automatically re-built when needed. Use indexes.
@roadmap_1346_li
@roadmap_1342_li
Support a special trigger on all tables.
@roadmap_1347_li
@roadmap_1343_li
Delete temporary files or objects using finalize.
@roadmap_1348_li
@roadmap_1344_li
Oracle compatibility: support calling 0-parameters functions without parenthesis. Make constants obsolete.
@roadmap_1349_li
@roadmap_1345_li
MySQL, HSQLDB compatibility: support where 'a'=1 (not supported by Derby, PostgreSQL)
@roadmap_1350_li
@roadmap_1346_li
Allow calling function with no parameters without parenthesis. See http://code.google.com/p/h2database/issues/detail?id=50
@roadmap_1351_li
@roadmap_1347_li
CSV: currently # is a line comment and can start at any field. Make it optional.
@roadmap_1352_li
@roadmap_1348_li
Add database creation date and time to the database.
@roadmap_1353_li
@roadmap_1349_li
Support ASSERTIONS.
@roadmap_1354_li
@roadmap_1350_li
MySQL compatibility: support comparing 1='a'
@roadmap_1355_li
@roadmap_1351_li
Support PostgreSQL lock modes: http://www.postgresql.org/docs/8.3/static/explicit-locking.html
@roadmap_1356_li
@roadmap_1352_li
PostgreSQL compatibility: test DbVisualizer and Squirrel SQL using a new PostgreSQL JDBC driver.
@roadmap_1357_li
@roadmap_1353_li
RunScript should be able to read from system in (or quite mode for Shell).
@roadmap_1358_li
@roadmap_1354_li
Natural join: support select x from dual natural join dual.
@roadmap_1359_li
@roadmap_1355_li
Natural join: somehow support this: select a.x, b.x, x from dual a natural join dual b
@roadmap_1360_li
@roadmap_1356_li
MySQL compatibility: for auto_increment columns, convert 0 to next value (as when inserting NULL).
@roadmap_1361_li
@roadmap_1357_li
Functions: support hashcode(value); cryptographic and fast
@roadmap_1362_li
@roadmap_1358_li
Serialized file lock: support long running queries.
@roadmap_1363_li
@roadmap_1359_li
Network: use 127.0.0.1 if other addresses don't work.
@roadmap_1364_li
@roadmap_1360_li
Select for update in mvcc mode: only lock the selected records.
@roadmap_1365_li
@roadmap_1361_li
Support reading JCR data: one table per node type; query table; cache option
@roadmap_1366_li
@roadmap_1362_li
OSGi: create a sample application, test, document.
@roadmap_1367_li
@roadmap_1363_li
help.csv: use complete examples for functions; run as test case.
@roadmap_1368_li
@roadmap_1364_li
Re-implement PooledConnection; use a lightweight connection object.
@roadmap_1369_li
@roadmap_1365_li
Doclet: convert tests in javadocs to a java class.
@roadmap_1370_li
@roadmap_1366_li
Doclet: format fields like methods, but support sorting by name and value.
@roadmap_1371_li
@roadmap_1367_li
Doclet: shrink the html files.
@roadmap_1372_li
@roadmap_1368_li
Finer granularity for SLF4J trace - See http://code.google.com/p/h2database/issues/detail?id=62
@roadmap_1373_li
@roadmap_1369_li
MySQL compatibility: support REPLACE - See http://code.google.com/p/h2database/issues/detail?id=73
@roadmap_1374_li
@roadmap_1370_li
MySQL compatibility: support SET NAMES 'latin1' - See also http://code.google.com/p/h2database/issues/detail?id=56
@roadmap_1375_li
@roadmap_1371_li
MySQL compatibility: DELETE .. FROM .. USING - See http://dev.mysql.com/doc/refman/5.0/en/delete.html
@roadmap_1376_li
@roadmap_1372_li
Allow to scan index backwards starting with a value (to better support ORDER BY DESC).
@roadmap_1377_li
@roadmap_1373_li
Java Service Wrapper: try http://yajsw.sourceforge.net/
@roadmap_1378_li
@roadmap_1374_li
Batch parameter for INSERT, UPDATE, and DELETE, and commit after each batch. See also MySQL DELETE.
@roadmap_1379_li
@roadmap_1375_li
MySQL compatibility: support ALTER TABLE .. MODIFY COLUMN.
@roadmap_1380_li
@roadmap_1376_li
Use a lazy and auto-close input stream (open resource when reading, close on eof).
#The stack trace of very common exceptions is no longer written to the .trace.db file by default.
@changelog_1003_h2
@changelog_1003_li
#An optimization for IN(..) and IN(SELECT...) is implemented, but disabled by default. To enable, set the system property h2.optimizeInList to true before loading the H2 JDBC driver. If enabled, this overrides h2.optimizeIn and h2.optimizeInJoin. Unlike now, this optimization will also speed up updates and deletes.
@changelog_1004_h2
#Version 1.1.117 (2009-08-09)
@changelog_1004_li
@changelog_1005_li
#New committer: Sam Van Oort has been contributing to H2 since quite some time in many ways (on the mailing list, documentation, and in the form of patches). He is now a committer.
@changelog_1005_li
@changelog_1006_li
#JaQu: the order of the fields in the database no longer needs to match the order in the database.
@changelog_1006_li
@changelog_1007_li
#Issue 103: MVCC: the setting MAX_MEMORY_UNDO can currently not be supported when using multi-version concurrency, that means the complete undo log must fit in memory.
@changelog_1007_li
@changelog_1008_li
#LIKE: the escape mechanism can now be disable using ESCAPE ''. The default escape character can be changed using the system property h2.defaultEscape. The default is still '\' (as in MySQL and PostgreSQL).
@changelog_1008_li
@changelog_1009_li
#Views using functions were not re-evaluated when necessary.
@changelog_1009_li
@changelog_1010_li
#Improved MySQL compatibility for SHOW COLUMNS.
@changelog_1010_li
@changelog_1011_li
#Improved PostgreSQL compatibility for timestamp literals with timezone.
@changelog_1011_li
@changelog_1012_li
#Sergi Vladykin translated the error messages to Russian. Thanks a lot!
@changelog_1012_li
@changelog_1013_li
#Support for Java 6 DatabaseMetaData.getTables, getColumns, getProcedures, and getProcedureColumns.
@changelog_1013_li
@changelog_1014_li
#Issue 101: Rollback of a large transaction (more than 100000 rows) could fail.
@changelog_1014_li
@changelog_1015_li
#Various bugfixes and improvements in the page store mechanism (still experimental).
@changelog_1015_li
@changelog_1016_li
#The functions LENGTH, OCTET_LENGTH, and BIT_LENGTH now return BIGINT.
@changelog_1016_li
@changelog_1017_li
#Data types CLOB and BLOB: the maximum precision was Integer.MAX_VALUE, it is now Long.MAX_VALUE.
@changelog_1017_li
@changelog_1018_li
#Multi-threaded kernel: creating and dropping temporary database objects and the potentially free pages list was not correctly synchronized. Thanks a lot to Eric Faulhaber for the test case and patch!
@changelog_1018_li
@changelog_1019_li
#Parsing SQL script files is now faster.
@changelog_1019_li
@changelog_1020_li
#CSV reading is now faster.
@changelog_1020_li
@changelog_1021_li
#SimpleResultSet.newInstance(SimpleRowSource rs) did not work.
@changelog_1021_h2
@changelog_1022_h2
#Version 1.1.116 (2009-07-18)
@changelog_1022_li
@changelog_1023_li
#Server-less multi-connection mode: more bugs are fixed.
@changelog_1023_li
@changelog_1024_li
#The built-in help (INFORMATION_SCHEMA.HELP) is smaller, shrinking the jar file size a bit.
@changelog_1024_li
@changelog_1025_li
#H2 Console: column of tables of non-default schemas are now also listed, except for schemas starting with 'INFO'.
@changelog_1025_li
@changelog_1026_li
#ALTER TABLE: removing an auto-increment or identity column didn't remove the sequence.
@changelog_1026_li
@changelog_1027_li
#Creating indexes is now a bit faster.
@changelog_1027_li
@changelog_1028_li
#PG Server: new system property h2.pgClientEncoding to explicitly set the encoding for clients that don't send the encoding (the default encoding is UTF-8). Thanks a lot to Sergi Vladykin for the patch!
@changelog_1028_li
@changelog_1029_li
#PG Server: improved compatibility by using the type ids of the PostgreSQL driver. Thanks a lot to Sergi Vladykin for the patch!
@changelog_1029_li
@changelog_1030_li
#H2 Console: Oracle system tables are no longer listed, improving performance.
@changelog_1030_li
@changelog_1031_li
#Result sets are now read-only except if the statement or prepared statement was created with the concurrency ResultSet.CONCUR_UPDATABLE. This change is required because the old behavior (all result set are updatable) violated the JDBC spec. For backward compatibility, use the system property h2.defaultResultSetConcurrency.
@changelog_1031_li
@changelog_1032_li
#New system property h2.defaultResultSetConcurrency to change the default result set concurrency.
@changelog_1032_li
@changelog_1033_li
#JDBC: using an invalid result set type or concurrency now throws an exception.
@changelog_1033_li
@changelog_1034_li
#If a pooled connection was not closed but garbage collected, a NullPointerException could occur.
@changelog_1034_li
@changelog_1035_li
#Fulltext search: a NullPointerException was thrown when updating a value that was NULL previously.
@changelog_1035_li
@changelog_1036_li
#The Recover tool did not work with .data.db files of the wrong size.
@changelog_1036_li
@changelog_1037_li
#Triggers: if there was an exception when initializing a trigger, this exception could be hidden, and in some cases (specially when using the Lucene fulltext index mechanism) a NullPointerException was thrown later on. Now the exception that occurred on init is thrown when changing data.
@changelog_1037_li
@changelog_1038_li
#The soft-references cache (CACHE_TYPE=SOFT_LRU) could throw a NullPointerException.
@changelog_1038_li
@changelog_1039_li
#To enable the new page store mechanism, append ;PAGE_STORE=TRUE to the database URL. or set the system property h2.pageStore to true. This mechanism is still experimental, and the file format will change, but it is quite stable now.
@changelog_1039_h2
@changelog_1040_h2
#Version 1.1.115 (2009-06-21)
@changelog_1040_li
@changelog_1041_li
#The new storage mechanism is now alpha quality. To try it out, set the system property "h2.pageStore" to "true" (java -Dh2.pageStore=true). There are still bugs to be found and fixed, for example inserting many rows references a lot of main memory. Performance is currently about the same as with the regular storage mechanism, but the database file size is smaller. The file format is not stable yet.
@changelog_1041_li
@changelog_1042_li
#ALTER TABLE could throw an exception "object already exists" in some cases.
@changelog_1042_li
@changelog_1043_li
#Views: in some situations, an ArrayIndexOutOfBoundsException was thrown when using the same view concurrently.
@changelog_1043_li
@changelog_1044_li
#java.util.UUID is now supported in PreparedStatement.setObject and user defined Java functions. ResultSet.getObject() returns a java.util.UUID when using the UUID data type.
@changelog_1044_li
@changelog_1045_li
#H2 Console: the language was reset to the browser language when disconnecting.
@changelog_1045_li
@changelog_1046_li
#H2 Console: improved Polish translation.
@changelog_1046_li
@changelog_1047_li
#Server-less multi-connection mode: more bugs are fixed.
@changelog_1047_li
@changelog_1048_li
#The download page now included the SHA1 checksums.
@changelog_1048_li
@changelog_1049_li
#Shell tool: the file encoding workaround is now documented if you run java org.h2.tools.Shell -?.
@changelog_1049_li
@changelog_1050_li
#The RunScript tool and SQL statement did not work with the compression method LZF.
@changelog_1050_li
@changelog_1051_li
#Fulltext search: searching for NULL or an empty string threw an exception.
@changelog_1051_li
@changelog_1052_li
#Lucene fulltext search: FTL_DROP_ALL did not drop the triggers.
@changelog_1052_li
@changelog_1053_li
#Backup: if the database contained CLOB or BLOB data, the backup included a file entry for the LOB directory. This caused the restore to fail.
@changelog_1053_li
@changelog_1054_li
#Data types: LONG is now an alias for BIGINT.
@changelog_1054_h2
@changelog_1055_h2
#Version 1.1.114 (2009-06-01)
@changelog_1055_li
@changelog_1056_li
#ResultSetMetaData.getColumnClassName returned the wrong class for CLOB and BLOB columns.
@changelog_1056_li
@changelog_1057_li
#Fulltext search: data is no longer deleted and re-inserted if the indexed columns didn't change.
@changelog_1057_li
@changelog_1058_li
#In some situations, an ArrayIndexOutOfBoundsException was thrown when adding rows. This was caused by a bug in the b-tree code.
@changelog_1058_li
@changelog_1059_li
#Microsoft Windows Vista: when using the the installer, Vista wrote "This program may not have installed correctly." This message should no longer appear (in the h2.nsi file, the line 'RequestExecutionLevel highest' was added).
@changelog_1059_li
@changelog_1060_li
#The Recover tool did not always work when the database contains referential integrity constraints.
@changelog_1060_li
@changelog_1061_li
#Java 1.5 is now required to run H2. If required, Retrotranslator can be used to create a Java 1.4 version (http://retrotranslator.sourceforge.net/).
@changelog_1061_h2
@changelog_1062_h2
#Version 1.1.113 (2009-05-21)
@changelog_1062_li
@changelog_1063_li
#Shell tool: the built-in commands EXIT, HELP, ?, LIST, and so on didn't work with a semicolon at the end.
@changelog_1063_li
@changelog_1064_li
#JDK 1.5 is now required to build the jar file. However it is still possible to create a jar file for Java 1.4. For details, see buildRelease.sh and buildRelease.bat. As an alternative, compile using JDK 1.5 or 1.6 and use Retrotranslator to create a Java 1.4 version (http://retrotranslator.sourceforge.net/).
@changelog_1064_li
@changelog_1065_li
#When deleting or updating many rows in a table, the space in the index file was not re-used in the default mode (persistent database, b-tree index, LOG=1). This caused the index file to grow over time. Workarounds were to delete and re-created the index file, alter the table (add a remove a column), or append ;LOG=2 to the database URL. To disable the change, set the system property h2.reuseSpaceBtreeIndex to false.
@changelog_1065_li
@changelog_1066_li
#Identifiers with a digit and then a dollar sign didn't work. Example: A1$B.
@changelog_1066_li
@changelog_1067_li
#MS SQL Server compatibility: support for linked tables with NVARCHAR, NCHAR, NCLOB, and LONGNVARCHAR.
@changelog_1067_li
@changelog_1068_li
#Android: workaround for a problem when using read-only databases in zip files (skip seems to be implemented incorrectly on the Android system).
@changelog_1068_li
@changelog_1069_li
#Calling execute() or prepareStatement() with null as the SQL statement now throws an exception.
@changelog_1069_li
@changelog_1070_li
#Benchmark: the number of executed statements was incorrect. The H2 database was loaded at the beginning of the test to collect results, now it is loaded at the very end. Thanks to Fred Toussi from HSQLDB for reporting those problems. However the changed do not affect the relative performance.
@changelog_1070_li
@changelog_1071_li
#H2 Console: command line settings are no longer stored in the properties file. They are now only used for the current process, except if they are explicitly saved.
@changelog_1071_li
@changelog_1072_li
#Cache: support for a second level soft-references cache. To enable it, append ;CACHE_TYPE=SOFT_LRU (or SOFT_TQ) to the database URL, or set the system property h2.cacheTypeDefault to "SOFT_LRU" / "SOFT_TQ". Enabling the second level cache reduces performance for small databases, but speeds up large databases. It makes sense to use it if the available memory size is unknown. Thanks a lot to Jan Kotek!
@changelog_1072_h2
@changelog_1073_h2
#Version 1.1.112 (2009-05-01)
@changelog_1073_li
@changelog_1074_li
#JdbcPreparedStatement.toString() could throw a NullPointerException.
#Connection pool: the default login timeout is now 5 minutes.
@changelog_1076_li
@changelog_1077_li
#After truncating tables, opening large databases could become slow because indexes were always re-built unnecessarily when opening.
@changelog_1077_li
@changelog_1078_li
#More bugs in the server-less multi-connection mode have been fixed: Sometimes parameters of prepared statements were lost when a reconnecting. Concurrent read operations were slow. To improve performance, executeQuery(..) must be used for queries (execute(..) switches to the write mode, which is slow).
@changelog_1078_li
@changelog_1079_li
#GROUP BY queries with a self-join (join to the same table) that were grouped by columns with indexes returned the wrong result in some cases.
@changelog_1079_li
@changelog_1080_li
#Improved error message when the .lock.db file modification time is in the future.
@changelog_1080_li
@changelog_1081_li
#The MERGE statement now returns 0 as the generated key if the row was updated.
@changelog_1081_li
@changelog_1082_li
#Running code coverage is now automated.
@changelog_1082_li
@changelog_1083_li
#A file system implementation can now be registered using FileSystem.register.
@changelog_1083_li
@changelog_1084_li
#The database file system is no longer included in the jar file, it moved to the test section.
@changelog_1084_h2
@changelog_1085_h2
#Version 1.1.111 (2009-04-10)
@changelog_1085_li
@changelog_1086_li
#In-memory databases can now run inside the Google App Engine.
@changelog_1086_li
@changelog_1087_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_1087_li
@changelog_1088_li
#The wrong exception was thrown when using unquoted text for the SQL statements COMMENT, ALTER USER, and SET PASSWORD.
@changelog_1088_li
@changelog_1089_li
#The built-in connection pool did not roll back transactions and enable autocommit enabled after closing a connection.
@changelog_1089_li
@changelog_1090_li
#Sometimes a StackOverflow occurred when checking for deadlock. See also http://code.google.com/p/h2database/issues/detail?id=61
@changelog_1090_li
@changelog_1091_li
#The Shell tool no longer truncates results with only one column, and displays a message if data was truncated.
@changelog_1091_h2
@changelog_1092_h2
#Version 1.1.110 (2009-04-03)
@changelog_1092_li
@changelog_1093_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_1093_li
@changelog_1094_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_1094_li
@changelog_1095_li
#The data type of a SUBSTRING method was wrong.
@changelog_1095_li
@changelog_1096_li
#ResultSet.findColumn and get methods with column label parameters now also check for matching column names (like most databases except MySQL).
@changelog_1096_li
@changelog_1097_li
#H2 Console: the browser system property now supports a list of arguments. Example: java -Dh2.browser="open,-a,Safari,%url" ...
@changelog_1097_li
@changelog_1098_li
#Improved Javadoc navigation (similar to Scaladoc).
@changelog_1098_li
@changelog_1099_li
#H2 Console: auto-complete of identifiers did not work correctly for H2 databases in MySQL mode.
@changelog_1099_li
@changelog_1100_li
#DISTINCT and GROUP BY on a CLOB column was broken.
@changelog_1100_li
@changelog_1101_li
#The FTP server moved to the tools section and is no longer included in the h2*.jar file.
@changelog_1101_li
@changelog_1102_li
#Improved error message for unsupported features: now the message says what exactly is not supported.
@changelog_1102_li
@changelog_1103_li
#Improved OSGi support.
@changelog_1103_li
@changelog_1104_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_1104_li
@changelog_1105_li
#The API of the tools changed a bit (each tool now returns an exit code).
@changelog_1105_li
@changelog_1106_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_1106_li
@changelog_1107_li
#CREATE TABLE: improved compatibility (support for UNIQUE NOT NULL).
@changelog_1107_li
@changelog_1108_li
#DatabaseMetaData.getSQLKeywords now returns the correct list.
@changelog_1108_li
@changelog_1109_li
#Deterministic user defined functions did not work when the parameter was a column. Fixed.
@changelog_1109_li
@changelog_1110_li
#JdbcConnectionPool.setLoginTimeout with 0 now uses the default timeout.
@changelog_1110_li
@changelog_1111_li
#Creating a JdbcConnectionPool has been simplified a bit.
@changelog_1111_li
@changelog_1112_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_1112_li
@changelog_1113_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_1113_li
@changelog_1114_li
#Linked tables to SQLite database can now be created.
@changelog_1114_li
@changelog_1115_li
#Nested IN(IN(...)) didn't work.
@changelog_1115_li
@changelog_1116_li
#NIO storage: the nio: prefix was using memory mapped files instead of FileChannel.
@changelog_1116_h2
@changelog_1117_h2
#Version 1.1.109 (2009-03-14)
@changelog_1117_li
@changelog_1118_li
#The optimization for IN(...) is now only used if comparing a column with an index.
@changelog_1118_li
@changelog_1119_li
#User defined functions can now be deterministic (see CREATE ALIAS documentation).
@changelog_1119_li
@changelog_1120_li
#Multiple nested queries in the FROM clause with parameters did not always work.
@changelog_1120_li
@changelog_1121_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_1121_li
@changelog_1122_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_1122_li
@changelog_1123_li
#The functions BITOR, BITAND, BITXOR, and MOD now accept and return BIGINT instead of INT.
@changelog_1123_li
@changelog_1124_li
#Could not use the same linked table multiple times in the same query.
@changelog_1124_li
@changelog_1125_li
#Bugs in the server-less multi-connection mode have been fixed.
@changelog_1125_li
@changelog_1126_li
#Column names could not be named "UNIQUE" (with the quotes).
@changelog_1126_li
@changelog_1127_li
#New system function TRANSACTION_ID() to get the current transaction identifier for a session.
@changelog_1127_h2
@changelog_1128_h2
#Version 1.1.108 (2009-02-28)
@changelog_1128_li
@changelog_1129_li
#When the shutdown hook closed the database, the last log file was deleted too early. This could cause uncommitted changes to be persisted. In some cases, this could cause data corruption.
@changelog_1129_li
@changelog_1130_li
#JdbcConnectionPool: it was possible to set a negative connection pool size.
@changelog_1130_li
@changelog_1131_li
#Fulltext search did not support table names with a backslash.
@changelog_1131_li
@changelog_1132_li
#The internal IntArray class did not work correctly when initialized with a zero length array.
@changelog_1132_li
@changelog_1133_li
#The H2 Console web application (war file) did only support ASCII characters. Now UTF-8 is supported.
@changelog_1133_li
@changelog_1134_li
#DATEADD does no longer require that the argument is a timestamp.
@changelog_1134_li
@changelog_1135_li
#The database file locking mechanism didn't work correctly on Mac OS.
@changelog_1135_li
@changelog_1136_li
#Some built-in functions reported the wrong precision, scale, and display size.
@changelog_1136_li
@changelog_1137_li
#MySQL compatibility for CREATE TABLE is improved (UNSIGNED, KEY).
@changelog_1137_li
@changelog_1138_li
#Recovery did not work if there were more than 255 lobs stored as files.
@changelog_1138_li
@changelog_1139_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_1139_li
@changelog_1140_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_1140_li
@changelog_1141_li
#The WebServlet did not close the database when un-deploying the web application.
@changelog_1141_li
@changelog_1142_li
#The exception message of failed INSERT or MERGE statements now includes all values and the row number.
@changelog_1142_li
@changelog_1143_li
#If opening a database failed with an out of memory exception, some files were not closed.
@changelog_1143_li
@changelog_1144_li
#Optimizer: the expected runtime calculation was incorrect. The fixed calculation should give slightly better query plans when using many joins.
@changelog_1144_li
@changelog_1145_li
#Improved exception message when connecting to a just started server fails.
@changelog_1145_li
@changelog_1146_li
#Connection.isValid is a bit faster.
@changelog_1146_li
@changelog_1147_li
#H2 Console: the autocomplete feature has been improved a bit. It can now better parse conditions.
@changelog_1147_li
@changelog_1148_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_1148_h2
@changelog_1149_h2
#Version 1.1.107 (2009-01-24)
@changelog_1149_li
@changelog_1150_li
#Some DatabaseMetaData operations did not work for non-admin users for versions 1.1.x.
@changelog_1150_li
@changelog_1151_li
#The MySQL compatibility extension fromUnixTime now used the English locale.
@changelog_1151_li
@changelog_1152_li
#When using LOG=2 and repeatedly updating the last row rows of a table, the index file grew quickly.
@changelog_1152_li
@changelog_1153_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_1153_li
@changelog_1154_li
#Enabling the trace mechanism by creating a specially named file is no longer supported.
@changelog_1154_h2
@changelog_1155_h2
#Version 1.1.106 (2009-01-04)
@changelog_1155_li
@changelog_1156_li
#Statement.setQueryTimeout did not work correctly for some statements.
@changelog_1156_li
@changelog_1157_li
#CREATE DOMAIN: built-in data types can now only be changed if no tables exist.
@changelog_1157_li
@changelog_1158_li
#Linked tables: a workaround for Oracle DATE columns has been implemented.
@changelog_1158_li
@changelog_1159_li
#DatabaseMetaData.getPrimaryKeys: the column PK_NAME now contains the constraint name instead of the index name (compatibility for PostgreSQL and Derby).
@changelog_1159_li
@changelog_1160_li
#Using IN(..) inside a IN(SELECT..) did not always work.
@changelog_1160_li
@changelog_1161_li
#Views with IN(..) that used a view itself did not work.
@changelog_1161_li
@changelog_1162_li
#Union queries with LIMIT or ORDER BY that are used in a view or subquery did not work.
@changelog_1162_li
@changelog_1163_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_1163_li
@changelog_1164_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_1164_li
@changelog_1165_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_1165_h2
@changelog_1166_h2
#Version 1.1.105 (2008-12-19)
@changelog_1166_li
@changelog_1167_li
#The setting STORAGE=TEXT is no longer supported.
@changelog_1167_li
@changelog_1168_li
#Deleting a database using the tool DeleteDbFiles deleted LOB files of other databases in the same directory.
@changelog_1168_li
@changelog_1169_li
#When used in a subquery, LIKE and IN(..) did not work correctly sometimes.
@changelog_1169_li
@changelog_1170_li
#The fulltext search documentation has been improved.
@changelog_1170_li
@changelog_1171_li
#ARRAY_GET returned the wrong data type (ARRAY). Now it returns VARCHAR.
@changelog_1171_li
@changelog_1172_li
#Natural join: the joined columns are not repeated any more when using SELECT *.
@changelog_1172_li
@changelog_1173_li
#User defined aggregate functions: the method getType expected internal data types instead of SQL types.
@changelog_1173_li
@changelog_1174_li
#User defined aggregate functions did not work if there was no group by expression.
@changelog_1174_li
@changelog_1175_li
#MySQL compatibility: support for := assignment as in @sum:=@sum+x
@changelog_1175_li
@changelog_1176_li
#INSERT INTO TEST(SELECT * FROM TEST) is now supported.
@changelog_1176_li
@changelog_1177_li
#Each session threw an invisible exception when garbage collected.
@changelog_1177_li
@changelog_1178_li
#Foreign key constraints that refer to a quoted column did not work.
@changelog_1178_li
@changelog_1179_li
#New meta data column INFORMATION_SCHEMA.TABLES.LAST_MODIFICATION to get the table modification counter.
@changelog_1179_li
@changelog_1180_li
#Shell: line comments didn't work correctly.
@changelog_1180_li
@changelog_1181_li
#H2 Console: columns are now listed for up to 500 tables instead of 100.
@changelog_1181_li
@changelog_1182_li
#H2 Console: Cmd+Enter executes the current statement, Alt+Space for autocomplete.
@changelog_1182_li
@changelog_1183_li
#JaQu: the maximum length of a column can now be defined using maxLength. For an example, see Product.java (maxLength(category, 255)).
@changelog_1183_li
@changelog_1184_li
#R&\#305;dvan A&\#287;ar has completed the Turkish translation of the H2 Console. Thanks a lot!
@changelog_1184_h2
@changelog_1185_h2
#Version 1.1.104 (2008-11-28)
@changelog_1185_li
@changelog_1186_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_1186_li
@changelog_1187_li
#JaQu: tables are now auto-created when running a query.
@changelog_1187_li
@changelog_1188_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_1188_li
@changelog_1189_li
#The function SUM could overflow when using large values. It returns now a data type that is safe.
@changelog_1189_li
@changelog_1190_li
#The function AVG could overflow when using large values. Fixed.
@changelog_1190_li
@changelog_1191_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_1191_li
@changelog_1192_li
#Build: JAVA_HOME is now automatically detected on Mac OS X.
@changelog_1192_li
@changelog_1193_li
#Testing for local connections was very slow on some systems.
@changelog_1193_li
@changelog_1194_li
#The cache memory usage calculation is more conservative.
@changelog_1194_li
@changelog_1195_li
#Allocating space got slower and slower the larger the database.
@changelog_1195_li
@changelog_1196_li
#ALTER TABLE ALTER COLUMN could throw the wrong exception in the last version (Table not found).
@changelog_1196_li
@changelog_1197_li
#Updatable result sets: the key columns can now be updated.
@changelog_1197_li
@changelog_1198_li
#The H2DatabaseProvider for ActiveObjects is now included in the tools section.
@changelog_1198_li
@changelog_1199_li
#The H2Platform for Oracle Toplink Essential has been improved a bit.
@changelog_1199_li
@changelog_1200_li
#The Windows service to start H2 didn't work in version 1.1.
@changelog_1200_li
@changelog_1201_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_1201_li
@changelog_1202_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_1202_li
@changelog_1203_li
#Compatibility for MS SQL Server DATEDIFF(YYYY, .., ..)
@changelog_1203_li
@changelog_1204_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_1204_li
@changelog_1205_li
#The interface CloseListener has a new method 'remove' that is called when the trigger is dropped.
@changelog_1205_li
@changelog_1206_li
#Fulltext search: there was a memory leak when creating and dropping fulltext indexes in a loop.
@changelog_1206_h2
@changelog_1207_h2
#Version 1.1.103 (2008-11-07)
@changelog_1207_li
@changelog_1208_li
#Could not order by a formula when the formula was in the group by list but not in the select list.
@changelog_1208_li
@changelog_1209_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_1209_li
@changelog_1210_li
#ALTER TABLE used a lot of memory when using multi-version concurrency.
@changelog_1210_li
@changelog_1211_li
#Referential integrity for in-memory databases didn't work in some cases in version 1.1.102.
@changelog_1211_li
@changelog_1212_li
#New column INFORMATION_SCHEMA.COLUMNS.SEQUENCE_NAME to get the name of the sequence for auto-increment columns.
@changelog_1212_li
@changelog_1213_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_1213_li
@changelog_1214_li
#The Japanese translation has been completed by Masahiro Ikemoto. Thanks a lot!
@changelog_1214_li
@changelog_1215_li
#Improved PostgreSQL compatibility for NEXTVAL and CURRVAL.
@changelog_1215_li
@changelog_1216_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_1216_li
@changelog_1217_li
#New system property h2.browser to set the browser to use.
@changelog_1217_li
@changelog_1218_li
#To start the browser, java.awt.Desktop.browse is now used if available.
@changelog_1218_h2
@changelog_1219_h2
#Version 1.1.102 (2008-10-24)
@changelog_1219_li
@changelog_1220_li
#The French translation of the H2 Console has been improved by Olivier Parent. Thanks a lot!
@changelog_1220_li
@changelog_1221_li
#There was a memory leak when creating and dropping tables and indexes in a loop (persistent database only).
@changelog_1221_li
@changelog_1222_li
#SET LOG 2 was not effective if executed after opening the database.
@changelog_1222_li
@changelog_1223_li
#Translating the H2 Console is now simpler.
@changelog_1223_li
@changelog_1224_li
#Common exception (error code 23*) are no longer written to the .trace.db file by default.
@changelog_1224_li
@changelog_1225_li
#In-memory databases don't write LOBs to files any longer.
@changelog_1225_li
@changelog_1226_li
#Self referencing constraints didn't restrict deleting rows that reference itself if there is another row that references it.
@changelog_1226_li
@changelog_1227_li
#ResultSetMetaData.getColumnName now returns the alias name except for columns.
@changelog_1227_li
@changelog_1228_li
#Temporary files are now deleted when the database is closed, even if they were not garbage collected so far.
@changelog_1228_h2
@changelog_1229_h2
#Version 1.1.101 (2008-10-17)
@changelog_1229_li
@changelog_1230_li
#Errors with code 42000 - 42999 are no longer written to the trace file by default.
@changelog_1230_li
@changelog_1231_li
#Queries with more than 10 tables are now faster.
@changelog_1231_li
@changelog_1232_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_1232_li
@changelog_1233_li
#IF [NOT] EXISTS is supported for named constraints in ALTER TABLE ... ADD/DROP CONSTRAINT.
@changelog_1233_li
@changelog_1234_li
#The error messages have been translated to Spanish by Dario V. Fassi. Thanks a lot!
@changelog_1234_li
@changelog_1235_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_1235_li
@changelog_1236_li
#Opening large database is now faster.
@changelog_1236_li
@changelog_1237_li
#New system property h2.socketConnectTimeout, the timeout in milliseconds to connect to a server. The default is 2000 (2 seconds).
@changelog_1237_li
@changelog_1238_li
#The wrong parameters were bound to subqueries with parameters, specially when using IN(SELECT ...) and IN(...).
@changelog_1238_li
@changelog_1239_li
#Unset parameters were not detected when the query was re-compiled.
@changelog_1239_li
@changelog_1240_li
#New functions ISO_YEAR, ISO_WEEK, ISO_DAY_OF_WEEK. Thanks a lot to Robert Rathsack for implementing those!
@changelog_1240_li
@changelog_1241_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_1241_li
@changelog_1242_li
#An out of memory error while deleting or updating many rows could result in a strange exception.
@changelog_1242_li
@changelog_1243_li
#Linked tables: compatibility with MS SQL Server has been improved.
@changelog_1243_li
@changelog_1244_li
#Renaming tables that have foreign keys with cascade didn't work correctly.
@changelog_1244_li
@changelog_1245_li
#The auto-reconnect feature didn't work when using the auto-server mode. Fixed.
@changelog_1245_li
@changelog_1246_li
#Fulltext search: new method FT_DROP_INDEX.
@changelog_1246_li
@changelog_1247_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_1247_li
@changelog_1248_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_1248_li
@changelog_1249_li
#The default value for MAX_MEMORY_UNDO is now 50000.
@changelog_1249_li
@changelog_1250_li
#For alias columns, ResultSetMetaData.getTableName() and getColumnName() now return the real table and column name in the default mode.
@changelog_1250_li
@changelog_1251_li
#In SQL scripts created with SCRIPT TO, schemas are now only created if they don't exist yet.
@changelog_1251_li
@changelog_1252_li
#After re-connecting to a database, the database event listener (if set) is informed about it.
@changelog_1252_li
@changelog_1253_li
#Local temporary tables now support indexes. Thanks a lot to Matt Roy!
@changelog_1253_li
@changelog_1254_li
#RUNSCRIPT no longer uses a temporary file.
@changelog_1254_li
@changelog_1255_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_1255_li
@changelog_1256_li
#After an automatic re-connect, part of the session state stays (the part that is stored in the SESSION_STATE table).
@changelog_1256_li
@changelog_1257_li
#The build didn't work if the directory temp didn't exist before.
@changelog_1257_li
@changelog_1258_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_1258_li
@changelog_1259_li
#WHERE .. IN (SELECT ...) could throw a NullPointerException.
@changelog_1259_li
@changelog_1260_li
#Improved Glassfish / Toplink support in H2Platform thanks to Marcio Borges from Brazil. Thanks a lot!
@changelog_1260_h2
@changelog_1261_h2
#Version 1.1.100 (2008-10-04)
@changelog_1261_li
@changelog_1262_li
#In version 1.1, the following system properties are now enabled by default: h2.lobFilesInDirectories, h2.optimizeGroupSorted, h2.optimizeInJoin, h2.shareLinkedConnections
@changelog_1262_li
@changelog_1263_li
#The H2 Console tool now works with the JDBC-ODBC bridge.
@changelog_1263_li
@changelog_1264_li
#The H2 Console tool now supports command line options to start things separately.
@changelog_1264_li
@changelog_1265_li
#Large objects did not work for in-memory databases in server mode in Linux.
@changelog_1265_li
@changelog_1266_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_1266_li
@changelog_1267_li
#The h2console.war can now be built using the Java build.
@changelog_1267_li
@changelog_1268_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_1268_li
@changelog_1269_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_1269_li
@changelog_1270_li
#CreateCluster: the property 'serverlist' is now called 'serverList'.
@changelog_1270_li
@changelog_1271_li
#The ConvertTraceFile tool could not parse some files because the trace mechanism did not encode prepared statement parameters.
@changelog_1271_li
@changelog_1272_li
#Databases names can now be one character long (the minimum size used to be 2 characters).
@changelog_1272_h2
@changelog_1273_h2
#Version 1.0.79 (2008-09-26)
@changelog_1273_li
@changelog_1274_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_1274_li
@changelog_1275_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_1275_li
@changelog_1276_li
#The server tool now displays the correct IP address if networked.
@changelog_1276_li
@changelog_1277_li
#Can now start a TCP server with port 0 (automatically select a port).
@changelog_1277_li
@changelog_1278_li
#Result sets with just a unique index can now be updated (previously a primary key was required).
@changelog_1278_li
@changelog_1279_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_1279_li
@changelog_1280_li
#LINKED TABLE: worked around a bug in Oracle with the CHAR data type.
@changelog_1280_li
@changelog_1281_li
#Faster hash code calculation for large binary arrays.
@changelog_1281_li
@changelog_1282_li
#Faster storage re-use algorithm thanks to Greg Dhuse from cleversafe.com.
@changelog_1282_li
@changelog_1283_li
#The database supports the SHOW command for better MySQL and PostgreSQL compatibility.
@changelog_1283_li
@changelog_1284_li
#The H2 Console now abbreviates large texts in results.
@changelog_1284_li
@changelog_1285_li
#Multiple UNION queries could not be used in derived tables.
@changelog_1285_li
@changelog_1286_li
#Linked tables can now be read-only.
@changelog_1286_li
@changelog_1287_li
#Temporary linked tables are now supported.
@changelog_1287_li
@changelog_1288_li
#It was possible to create tables in read-only databases.
@changelog_1288_li
@changelog_1289_li
#SET SCHEMA_SEARCH_PATH is now documented.
@changelog_1289_li
@changelog_1290_li
#SET SCHEMA did not work for views.
@changelog_1290_li
@changelog_1291_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_1291_li
@changelog_1292_li
#The maximum log file size setting was ignored for large databases.
@changelog_1292_li
@changelog_1293_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_1293_li
@changelog_1294_li
#The data type JAVA_OBJECT could not be used in updatable result sets.
@changelog_1294_li
@changelog_1295_li
#The system property h2.optimizeInJoin did not work correctly.
@changelog_1295_li
@changelog_1296_li
#Conditions such as ID=? AND ID>? were slow.
@changelog_1296_h2
@changelog_1297_h2
#Version 1.0.78 (2008-08-28)
@changelog_1297_li
@changelog_1298_li
#The documentation no longer uses a frameset (except the Javadocs).
@changelog_1298_li
@changelog_1299_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_1299_li
@changelog_1300_li
#Java methods with variable number of parameters can now be used (for Java 1.5 or newer).
@changelog_1300_li
@changelog_1301_li
#The Japanese translation has been improved by Masahiro Ikemoto. Thanks a lot!
@changelog_1301_li
@changelog_1302_li
#The H2 Console replaced an empty user name with a single space.
@changelog_1302_li
@changelog_1303_li
#The build target 'build jarSmall' now includes the embedded database.
@changelog_1303_li
@changelog_1304_li
#JdbcDataSource now keeps the password in a char array where possible.
@changelog_1304_li
@changelog_1305_li
#ResultSet.absolute did not always work with large result sets.
@changelog_1305_li
@changelog_1306_li
#Column aliases can now be used in GROUP BY and HAVING.
@changelog_1306_li
@changelog_1307_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_1307_h2
@changelog_1308_h2
#Version 1.0.77 (2008-08-16)
@changelog_1308_li
@changelog_1309_li
#JaQu is now using prepared statements and supports Date, Time, Timestamp.
@changelog_1309_li
@changelog_1310_li
#When using remote in-memory databases, large LOB objects did not work.
@changelog_1310_li
@changelog_1311_li
#Timestamp columns such as TIMESTAMP(6) were not compatible to other database.
@changelog_1311_li
@changelog_1312_li
#Opening a large database was slow if there was a problem opening the previous time.
@changelog_1312_li
@changelog_1313_li
#NOT IN(SELECT ...) was incorrect if the subquery returns no rows.
@changelog_1313_li
@changelog_1314_li
#CREATE TABLE AS SELECT did not work correctly in the multi-version concurrency mode.
@changelog_1314_li
@changelog_1315_li
#Support a comma before closing a list, as in: create table test(id int,)
@changelog_1315_li
@changelog_1316_li
#MySQL compatibility: linked tables had lower case column names on some systems.
@changelog_1316_li
@changelog_1317_li
#DB2 compatibility: the DB2 fetch-first-clause is supported.
@changelog_1317_li
@changelog_1318_li
#Oracle compatibility: old style outer join syntax using (+) did work correctly sometimes.
@changelog_1318_li
@changelog_1319_li
#ResultSet.setFetchSize is now supported.
@changelog_1319_li
@changelog_1320_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_1320_h2
@changelog_1321_h2
#Version 1.0.76 (2008-07-27)
@changelog_1321_li
@changelog_1322_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_1322_li
@changelog_1323_li
#Invalid database names are now detected and a better error message is thrown.
@changelog_1323_li
@changelog_1324_li
#ResultSetMetaData.getColumnClassName now returns the correct class name for BLOB and CLOB.
@changelog_1324_li
@changelog_1325_li
#Fixed the Oracle mode: Oracle allows multiple rows only where all columns of the unique index are NULL.
@changelog_1325_li
@changelog_1326_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_1326_li
@changelog_1327_li
#ORDER BY on tableName.columnName didn't work correctly if the column name was also used as an alias.
@changelog_1327_li
@changelog_1328_li
#H2 Console: the progress display when opening a database has been improved.
@changelog_1328_li
@changelog_1329_li
#The error message when the server doesn't start has been improved.
@changelog_1329_li
@changelog_1330_li
#Key values can now be changed in updatable result sets.
@changelog_1330_li
@changelog_1331_li
#Changes in updatable result sets are now visible even when resetting the result set.
@changelog_1331_li
@changelog_1332_li
#Temporary files were sometimes deleted too late when executing large insert, update, or delete operations.
@changelog_1332_li
@changelog_1333_li
#The database file was growing after deleting many rows, and after large update operations.
#RECOVER=1 should automatically recover, =2 should run the recovery tool if required
@roadmap_1010_li
@roadmap_1009_li
#Optimization: result set caching (like MySQL)
@roadmap_1011_li
@roadmap_1010_li
#Server side cursors
@roadmap_1012_h2
@roadmap_1011_h2
#Priority 2
@roadmap_1013_li
@roadmap_1012_li
#Improve test code coverage
@roadmap_1014_li
@roadmap_1013_li
#Procedural language / script language (Java, Javascript)
@roadmap_1015_li
@roadmap_1014_li
#Fulltext search: support streaming CLOB data.
@roadmap_1015_li
#Optimize ID=? OR ID=? to ID IN(?, ?) or UNION if the cost is lower
@roadmap_1016_li
#Optimize .. OR .. to IN(..) or UNION if the cost is lower
#Enable warning for 'Local variable declaration hides another field or variable'.
@roadmap_1017_li
#Enable warning for 'Local variable declaration hides another field or variable'.
#Test multi-threaded in-memory db access
@roadmap_1018_li
#Test multi-threaded in-memory db access
#MVCC: select for update should only lock the selected rows.
@roadmap_1019_li
#MVCC: select for update should only lock the selected rows.
#Option to shutdown all the running servers (on the same VM).
@roadmap_1020_li
#Option to shutdown all the running servers (on the same VM).
#Index organized tables CREATE TABLE...(...) ORGANIZATION INDEX (store in data file) (probably file format changes are required for rowId)
@roadmap_1021_li
#Optimize ID=? OR ID=?: convert to IN(...)
#[Requires page store] Better space re-use in the files after deleting data: shrink the data file without closing the database (if the end of the file is empty)
@roadmap_1022_li
#Index organized tables CREATE TABLE...(...) ORGANIZATION INDEX (store in data file) (probably file format changes are required for rowId)
#Full outer joins
@roadmap_1023_li
#[Requires page store] Better space re-use in the files after deleting data: shrink the data file without closing the database (if the end of the file is empty)
#Implement INSTEAD OF trigger (for views, tables, metadata tables).
@roadmap_1024_li
#Implement INSTEAD OF trigger (for views, tables, metadata tables).
#Support triggers for INFORMATION_SCHEMA tables (to better support PostgreSQL catalog: rebuild after creating new tables)
@roadmap_1025_li
#Triggers for metadata tables; use for PostgreSQL catalog
#Use triggers for metadata tables; use for PostgreSQL catalog
@roadmap_1026_li
#Support triggers for INFORMATION_SCHEMA tables (to better support PostgreSQL catalog: rebuild after creating new tables)
#Maven: deploy / upload h2..-sources.jar and javadocs as well.
@roadmap_1027_li
#Full outer joins
#Test very large databases and LOBs (up to 256 GB)
@roadmap_1028_li
#Maven: deploy / upload h2..-sources.jar and javadocs as well.
#Support hints for the optimizer (which index to use, enforce the join order).
@roadmap_1029_li
#Support trigger on the tables information_schema.tables and ...columns
#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_1030_li
#Test very large databases and LOBs (up to 256 GB)
#Clustering: recovery needs to becomes fully automatic. Global write lock feature.
@roadmap_1031_li
#Support hints for the optimizer (which index to use, enforce the join order).
#Support mixed clustering mode (one embedded, the other server mode)
@roadmap_1032_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)
#Sequence: add features [NO] MINVALUE, MAXVALUE, CYCLE
@roadmap_1033_li
#Clustering: recovery needs to becomes fully automatic. Global write lock feature.
#Linked schema using CSV files: one schema for a directory of files; support indexes for CSV files
#Include SMPT (mail) server (at least client) (alert on cluster failure, low disk space,...)
@roadmap_1071_li
#iReport to support H2
#Drop with restrict (currently cascade is the default)
@roadmap_1072_li
#Implement missing JDBC API (CallableStatement,...)
#JSON parser and functions
@roadmap_1073_li
#Compression of the cache
#Automatic collection of statistics (auto ANALYZE)
@roadmap_1074_li
#Include SMPT (mail) server (at least client) (alert on cluster failure, low disk space,...)
#Server: client ping from time to time (to avoid timeout - is timeout a problem?)
@roadmap_1075_li
#Drop with restrict (currently cascade is the default)
#Copy database: tool with config GUI and batch mode, extensible (example: compare)
@roadmap_1076_li
#JSON parser and functions
#Document, implement tool for long running transactions using user-defined compensation statements.
@roadmap_1077_li
#Automatic collection of statistics (auto ANALYZE)
#Support SET TABLE DUAL READONLY
@roadmap_1078_li
#Server: client ping from time to time (to avoid timeout - is timeout a problem?)
#GCJ: what is the state now?
@roadmap_1079_li
#Copy database: tool with config GUI and batch mode, extensible (example: compare)
#Events for: database Startup, Connections, Login attempts, Disconnections, Prepare (after parsing), Web Server (see http://docs.openlinksw.com/virtuoso/fn_dbev_startup.html)
@roadmap_1080_li
#Document, implement tool for long running transactions using user-defined compensation statements.
#Optimization: log compression
@roadmap_1081_li
#Support SET TABLE DUAL READONLY
#ROW_NUMBER() OVER([ORDER BY columnName])
@roadmap_1082_li
#GCJ: what is the state now?
#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_1083_li
#Events for: database Startup, Connections, Login attempts, Disconnections, Prepare (after parsing), Web Server (see http://docs.openlinksw.com/virtuoso/fn_dbev_startup.html)
#Compatibility: in MySQL, HSQLDB, /0.0 is NULL; in PostgreSQL, Derby: division by zero
@roadmap_1084_li
#Optimization: log compression
#Functional tables should accept parameters from other tables (see FunctionMultiReturn) SELECT * FROM TEST T, P2C(T.A, T.R)
@roadmap_1085_li
#ROW_NUMBER() OVER([ORDER BY columnName])
#Custom class loader to reload functions on demand
@roadmap_1086_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)
#Test http://mysql-je.sourceforge.net/
@roadmap_1087_li
#Compatibility: in MySQL, HSQLDB, /0.0 is NULL; in PostgreSQL, Derby: division by zero
#Close all files when closing the database (including LOB files that are open on the client side)
@roadmap_1088_li
#Functional tables should accept parameters from other tables (see FunctionMultiReturn) SELECT * FROM TEST T, P2C(T.A, T.R)
#EXE file: maybe use http://jsmooth.sourceforge.net
@roadmap_1089_li
#Custom class loader to reload functions on demand
#Performance: automatically build in-memory indexes if the whole table is in memory
@roadmap_1090_li
#Test http://mysql-je.sourceforge.net/
#H2 Console: the webclient could support more features like phpMyAdmin.
@roadmap_1091_li
#Close all files when closing the database (including LOB files that are open on the client side)
#Use Janino to convert Java to C++
@roadmap_1092_li
#EXE file: maybe use http://jsmooth.sourceforge.net
#The HELP information schema can be directly exposed in the Console
@roadmap_1093_li
#Performance: automatically build in-memory indexes if the whole table is in memory
#Maybe use the 0x1234 notation for binary fields, see MS SQL Server
@roadmap_1094_li
#H2 Console: the webclient could support more features like phpMyAdmin.
#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_1095_li
#Use Janino to convert Java to C++
#SQL Server 2005, Oracle: support COUNT(*) OVER(). See http://www.orafusion.com/art_anlytc.htm
@roadmap_1096_li
#The HELP information schema can be directly exposed in the Console
#RANK() and DENSE_RANK(), Partition using OVER()
@roadmap_1097_li
#Maybe use the 0x1234 notation for binary fields, see MS SQL Server
#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_1124_li
@roadmap_1120_li
#Functions with unknown return or parameter data types: serialize / deserialize
@roadmap_1125_li
@roadmap_1121_li
#Test if idle TCP connections are closed, and how to disable that
@roadmap_1126_li
@roadmap_1122_li
#Try using a factory for Row, Value[] (faster?), http://javolution.org/, alternative ObjectArray / IntArray
@roadmap_1127_li
@roadmap_1123_li
#Auto-Update feature for database, .jar file
@roadmap_1128_li
@roadmap_1124_li
#ResultSet SimpleResultSet.readFromURL(String url): id varchar, state varchar, released timestamp
@roadmap_1129_li
@roadmap_1125_li
#Partial indexing (see PostgreSQL)
@roadmap_1130_li
@roadmap_1126_li
#The build should fail if the test fails
@roadmap_1131_li
@roadmap_1127_li
#Add GUI to build a custom version (embedded, fulltext,...) using build flags
@roadmap_1132_li
@roadmap_1128_li
#http://rubyforge.org/projects/hypersonic/
@roadmap_1133_li
@roadmap_1129_li
#Add comparator (x === y) : (x = y or (x is null and y is null))
@roadmap_1134_li
@roadmap_1130_li
#Try to create trace file even for read only databases
@roadmap_1135_li
@roadmap_1131_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)
@roadmap_1136_li
@roadmap_1132_li
#Count on a column that can not be null could be optimized to COUNT(*)
@roadmap_1137_li
@roadmap_1133_li
#Table order: ALTER TABLE TEST ORDER BY NAME DESC (MySQL compatibility)
@roadmap_1138_li
@roadmap_1134_li
#Backup tool should work with other databases as well
@roadmap_1139_li
@roadmap_1135_li
#Console: -ifExists doesn't work for the console. Add a flag to disable other dbs
@roadmap_1140_li
@roadmap_1136_li
#Performance: update in-place
@roadmap_1141_li
@roadmap_1137_li
#Check if 'FSUTIL behavior set disablelastaccess 1' improves the performance (fsutil behavior query disablelastaccess)
#Compatibility with Derby: VALUES(1), (2); SELECT * FROM (VALUES (1), (2)) AS myTable(c1)
@roadmap_1194_li
@roadmap_1190_li
#Compatibility: # is the start of a single line comment (MySQL) but date quote (Access). Mode specific
@roadmap_1195_li
@roadmap_1191_li
#Run benchmarks with JDK 1.5, JDK 1.6, java -server
@roadmap_1196_li
@roadmap_1192_li
#Optimizations: faster hash function for strings, byte arrays
@roadmap_1197_li
@roadmap_1193_li
#DatabaseEventListener: callback for all operations (including expected time, RUNSCRIPT) and cancel functionality
@roadmap_1198_li
@roadmap_1194_li
#H2 Console / large result sets: use 'streaming' instead of building the page in-memory
@roadmap_1199_li
@roadmap_1195_li
#Benchmark: add a graph to show how databases scale (performance/database size)
@roadmap_1200_li
@roadmap_1196_li
#Implement a SQLData interface to map your data over to a custom object
@roadmap_1201_li
@roadmap_1197_li
#In the MySQL and PostgreSQL mode, use lower case identifiers by default (DatabaseMetaData.storesLowerCaseIdentifiers = true)
@roadmap_1202_li
@roadmap_1198_li
#Allow execution time prepare for SELECT * FROM CSVREAD(?, 'columnNameString')
@roadmap_1203_li
@roadmap_1199_li
#Support multiple directories (on different hard drives) for the same database
@roadmap_1204_li
@roadmap_1200_li
#Server protocol: use challenge response authentication, but client sends hash(user+password) encrypted with response
@roadmap_1205_li
@roadmap_1201_li
#Support EXEC[UTE] (doesn't return a result set, compatible to MS SQL Server)
@roadmap_1206_li
@roadmap_1202_li
#Support native XML data type
@roadmap_1207_li
@roadmap_1203_li
#Support triggers with a string property or option: SpringTrigger, OSGITrigger
@roadmap_1208_li
@roadmap_1204_li
#Clustering: adding a node should be very fast and without interrupting clients (very short lock)
@roadmap_1209_li
@roadmap_1205_li
#Support materialized views (using triggers)
@roadmap_1210_li
@roadmap_1206_li
#Ability to resize the cache array when resizing the cache
@roadmap_1211_li
@roadmap_1207_li
#Time based cache writing (one second after writing the log)
@roadmap_1212_li
@roadmap_1208_li
#Check state of H2 driver for DDLUtils: https://issues.apache.org/jira/browse/DDLUTILS-185
@roadmap_1213_li
@roadmap_1209_li
#Support JMX: create an MBean for each database and server (support JConsole). See http://thedevcloud.blogspot.com/2008/10/displaying-hsql-database-manager-in.html http://java.sun.com/j2se/1.5.0/docs/api/java/lang/management/ManagementFactory.html#getPlatformMBeanServer() http://java.sun.com/j2se/1.5.0/docs/guide/management/agent.html
@roadmap_1214_li
@roadmap_1210_li
#Index usage for REGEXP LIKE.
@roadmap_1215_li
@roadmap_1211_li
#Compatibility: add a role DBA (like ADMIN).
@roadmap_1216_li
@roadmap_1212_li
#Better support multiple processors for in-memory databases.
@roadmap_1217_li
@roadmap_1213_li
#Access rights: remember the owner of an object. COMMENT: allow owner of object to change it.
@roadmap_1218_li
@roadmap_1214_li
#Access rights: finer grained access control (grant access for specific functions)
@roadmap_1219_li
@roadmap_1215_li
#Support N'text'
@roadmap_1220_li
@roadmap_1216_li
#Support SCOPE_IDENTITY() to avoid problems when inserting rows in a trigger
@roadmap_1221_li
@roadmap_1217_li
#Set a connection read only (Connection.setReadOnly)
@roadmap_1222_li
@roadmap_1218_li
#In MySQL mode, for AUTO_INCREMENT columns, don't set the primary key
@roadmap_1223_li
@roadmap_1219_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).
@roadmap_1224_li
@roadmap_1220_li
#Support compatibility for jdbc:hsqldb:res:
@roadmap_1225_li
@roadmap_1221_li
#Provide an Java SQL builder with standard and H2 syntax
@roadmap_1226_li
@roadmap_1222_li
#Trace: write OS, file system, JVM,... when opening the database
@roadmap_1227_li
@roadmap_1223_li
#Support indexes for views (probably requires materialized views)
@roadmap_1228_li
@roadmap_1224_li
#Document SET SEARCH_PATH, BEGIN, EXECUTE, parameters
@roadmap_1229_li
@roadmap_1225_li
#Browser: use Desktop.isDesktopSupported and browse when using JDK 1.6
@roadmap_1230_li
@roadmap_1226_li
#Server: use one listener (detect if the request comes from an PG or TCP client)
@roadmap_1231_li
@roadmap_1227_li
#Store dates as 'local'. Existing files use GMT. Use escape syntax for compatibility.
@roadmap_1232_li
@roadmap_1228_li
#Support data type INTERVAL
@roadmap_1233_li
@roadmap_1229_li
#Optimize SELECT MIN(ID), MAX(ID), COUNT(*) FROM TEST WHERE ID BETWEEN 100 AND 200
#Does the FTP server has problems with multithreading?
@roadmap_1260_li
@roadmap_1256_li
#Write an article about SQLInjection (h2\src\docsrc\html\images\SQLInjection.txt)
@roadmap_1261_li
@roadmap_1257_li
#Convert SQL-injection-2.txt to html document, include SQLInjection.java sample
@roadmap_1262_li
@roadmap_1258_li
#Improve LOB in directories performance
@roadmap_1263_li
@roadmap_1259_li
#Web site design: http://www.igniterealtime.org/projects/openfire/index.jsp
@roadmap_1264_li
@roadmap_1260_li
#HSQLDB compatibility: Openfire server uses: CREATE SCHEMA PUBLIC AUTHORIZATION DBA; CREATE USER SA PASSWORD ""; GRANT DBA TO SA; SET SCHEMA PUBLIC
@roadmap_1265_li
@roadmap_1261_li
#Translation: use ?? in help.csv
@roadmap_1266_li
@roadmap_1262_li
#Translated .pdf
@roadmap_1267_li
@roadmap_1263_li
#Cluster: hot deploy (adding a node at runtime)
@roadmap_1268_li
@roadmap_1264_li
#MySQL compatibility: update test1 t1, test2 t2 set t1.id = t2.id where t1.id = t2.id;
@roadmap_1269_li
@roadmap_1265_li
#Recovery tool: bad blocks should be converted to INSERT INTO SYSTEM_ERRORS(...), and things should go into the .trace.db file
@roadmap_1270_li
@roadmap_1266_li
#RECOVER=2 to backup the database, run recovery, open the database
@roadmap_1271_li
@roadmap_1267_li
#Recovery should work with encrypted databases
@roadmap_1272_li
@roadmap_1268_li
#Corruption: new error code, add help
@roadmap_1273_li
@roadmap_1269_li
#Space reuse: after init, scan all storages and free those that don't belong to a live database object
@roadmap_1274_li
@roadmap_1270_li
#SysProperties: change everything to H2_...
@roadmap_1275_li
@roadmap_1271_li
#Use FilterIn / FilterOut putStream?
@roadmap_1276_li
@roadmap_1272_li
#Access rights: add missing features (users should be 'owner' of objects; missing rights for sequences; dropping objects)
@roadmap_1277_li
@roadmap_1273_li
#Support NOCACHE table option (Oracle)
@roadmap_1278_li
@roadmap_1274_li
#Support table partitioning.
@roadmap_1279_li
@roadmap_1275_li
#Index usage for UPDATE ... WHERE .. IN (SELECT...)
@roadmap_1280_li
@roadmap_1276_li
#Add regular javadocs (using the default doclet, but another css) to the homepage.
@roadmap_1281_li
@roadmap_1277_li
#The database should be kept open for a longer time when using the server mode.
@roadmap_1282_li
@roadmap_1278_li
#Javadocs: for each tool, add a copy & paste sample in the class level.
@roadmap_1283_li
@roadmap_1279_li
#Javadocs: add @author tags.
@roadmap_1284_li
@roadmap_1280_li
#Fluent API for tools: Server.createTcpServer().setPort(9081).setPassword(password).start();
@roadmap_1285_li
@roadmap_1281_li
#MySQL compatibility: real SQL statement for DESCRIBE TEST
@roadmap_1286_li
@roadmap_1282_li
#Use a default delay of 1 second before closing a database.
@roadmap_1287_li
@roadmap_1283_li
#Write (log) to system table before adding to internal data structures.
@roadmap_1288_li
@roadmap_1284_li
#Support very large deletes and updates.
@roadmap_1289_li
@roadmap_1285_li
#Doclet (javadocs): constructors are not listed.
@roadmap_1290_li
@roadmap_1286_li
#Support direct lookup for MIN and MAX when using WHERE (see todo.txt / Direct Lookup).
@roadmap_1291_li
@roadmap_1287_li
#Support other array types (String[], double[]) in PreparedStatement.setObject(int, Object);
@roadmap_1292_li
@roadmap_1288_li
#MVCC should not be memory bound (uncommitted data is kept in memory in the delta index; maybe using a regular b-tree index solves the problem).
@roadmap_1293_li
@roadmap_1289_li
#Oracle compatibility: support NLS_DATE_FORMAT.
@roadmap_1294_li
@roadmap_1290_li
#Support flashback queries as in Oracle.
@roadmap_1295_li
@roadmap_1291_li
#Import / Export of fixed with text files.
@roadmap_1296_li
@roadmap_1292_li
#Support OUT parameters in user-defined procedures.
@roadmap_1297_li
@roadmap_1293_li
#Support getGeneratedKeys to return multiple rows when used with batch updates. This is supported by MySQL, but not Derby. Both PostgreSQL and HSQLDB don't support getGeneratedKeys. Also support it when using INSERT ... SELECT.
@roadmap_1298_li
@roadmap_1294_li
#HSQLDB compatibility: automatic data type for SUM if value is the value is too big (by default use the same type as the data).
@roadmap_1299_li
@roadmap_1295_li
#Improve the optimizer to select the right index for special cases: where id between 2 and 4 and booleanColumn
@roadmap_1300_li
@roadmap_1296_li
#Linked tables: make hidden columns available (Oracle: rowid and ora_rowscn columns).
@roadmap_1301_li
@roadmap_1297_li
#Support merge join.
@roadmap_1302_li
@roadmap_1298_li
#H2 Console: in-place autocomplete.
@roadmap_1303_li
@roadmap_1299_li
#Oracle: support DECODE method (convert to CASE WHEN).
@roadmap_1304_li
@roadmap_1300_li
#Support large databases: split LOB (BLOB, CLOB) to multiple directories / disks (similar to tablespaces).
@roadmap_1305_li
@roadmap_1301_li
#Support to assign a primary key index a user defined name.
@roadmap_1306_li
@roadmap_1302_li
#Cluster: add feature to make sure cluster nodes can not get out of sync (for example by stopping one process).
@roadmap_1307_li
@roadmap_1303_li
#H2 Console: support configuration option for fixed width (monospace) font.
@roadmap_1308_li
@roadmap_1304_li
#Native fulltext search: support analyzers (specially for Chinese, Japanese).
@roadmap_1309_li
@roadmap_1305_li
#Automatically compact databases from time to time (as a background process).
@roadmap_1310_li
@roadmap_1306_li
#Support SCOPE_IDENTITY().
@roadmap_1311_li
@roadmap_1307_li
#Support GRANT SELECT, UPDATE ON *.
@roadmap_1312_li
@roadmap_1308_li
#Test Eclipse DTP.
@roadmap_1313_li
@roadmap_1309_li
#Pure SQL triggers (example: update parent table if the child table is changed).
@roadmap_1314_li
@roadmap_1310_li
#H2 Console: autocomplete: keep the previous setting
@roadmap_1315_li
@roadmap_1311_li
#MySQL, MS SQL Server compatibility: support case sensitive (mixed case) identifiers without quotes.
@roadmap_1316_li
@roadmap_1312_li
#executeBatch: option to stop at the first failed statement.
@roadmap_1317_li
@roadmap_1313_li
#Implement OLAP features as described here: http://www.devx.com/getHelpOn/10MinuteSolution/16573/0/page/5
@roadmap_1318_li
@roadmap_1314_li
#Support Oracle ROWID (unique identifier for each row).
@roadmap_1319_li
@roadmap_1315_li
#Server mode: improve performance for batch updates.
@roadmap_1320_li
@roadmap_1316_li
#Applets: support read-only databases in a zip file (accessed as a resource).
@roadmap_1321_li
@roadmap_1317_li
#Long running queries / errors / trace system table.
@roadmap_1322_li
@roadmap_1318_li
#H2 Console should support JaQu directly.
@roadmap_1323_li
@roadmap_1319_li
#H2 Console: support single file upload and directory download (optional).
@roadmap_1324_li
@roadmap_1320_li
#Document FTL_SEARCH, FTL_SEARCH_DATA.
@roadmap_1325_li
@roadmap_1321_li
#Sequences: CURRVAL should be session specific. Compatibility with PostgreSQL.
@roadmap_1326_li
@roadmap_1322_li
#Support DatabaseMetaData.insertsAreDetected: updatable result sets should detect inserts.
@roadmap_1327_li
@roadmap_1323_li
#Auto-server: add option to define the IP address range or list.
@roadmap_1328_li
@roadmap_1324_li
#Index creation only using deterministic functions.
@roadmap_1329_li
@roadmap_1325_li
#Use http://recaptcha.net somehow to secure the Google Group.
@roadmap_1330_li
@roadmap_1326_li
#Support DELETE with TOP or LIMIT. See also: http://dev.mysql.com/doc/refman/5.1/de/delete.html
@roadmap_1331_li
@roadmap_1327_li
#Change the default for NULL || 'x' to return NULL
@roadmap_1332_li
@roadmap_1328_li
#ANALYZE: use a bloom filter for each indexed column to estimate count of distinct values.
@roadmap_1333_li
@roadmap_1329_li
#ANALYZE: for unique indexes that allow null, count the number of null.
@roadmap_1334_li
@roadmap_1330_li
#AUTO_SERVER: support changing IP addresses (disable a network while the database is open).
@roadmap_1335_li
@roadmap_1331_li
#Avoid using java.util.Calendar internally because it's slow, complicated, and seems to be buggy.
@roadmap_1336_li
@roadmap_1332_li
#Support TRUNCATE .. CASCADE like PostgreSQL.
@roadmap_1337_li
@roadmap_1333_li
#Support opening a database that is in the classpath, maybe using a new file system.
@roadmap_1338_li
@roadmap_1334_li
#Fulltext search: lazy result generation using SimpleRowSource.
@roadmap_1339_li
@roadmap_1335_li
#Support transformation to join for user defined functions, as for IN(SELECT...).
@roadmap_1340_li
@roadmap_1336_li
#Fulltext search: support alternative syntax: WHERE FTL_CONTAINS(name, 'hello').
@roadmap_1341_li
@roadmap_1337_li
#MySQL compatibility: support REPLACE, see http://dev.mysql.com/doc/refman/5.1/de/replace.html
@roadmap_1342_li
@roadmap_1338_li
#MySQL compatibility: support INSERT INTO table SET column1 = value1, column2 = value2
@roadmap_1343_li
@roadmap_1339_li
#Docs: add a one line description for each functions and SQL statements at the top (in the link section).
@roadmap_1344_li
@roadmap_1340_li
#Javadoc search: weight for titles should be higher ('random' should list Functions as the best match).
@roadmap_1345_li
@roadmap_1341_li
#Replace information_schema tables with regular tables that are automatically re-built when needed. Use indexes.
@roadmap_1346_li
@roadmap_1342_li
#Support a special trigger on all tables.
@roadmap_1347_li
@roadmap_1343_li
#Delete temporary files or objects using finalize.
@roadmap_1348_li
@roadmap_1344_li
#Oracle compatibility: support calling 0-parameters functions without parenthesis. Make constants obsolete.
@roadmap_1349_li
@roadmap_1345_li
#MySQL, HSQLDB compatibility: support where 'a'=1 (not supported by Derby, PostgreSQL)
@roadmap_1350_li
@roadmap_1346_li
#Allow calling function with no parameters without parenthesis. See http://code.google.com/p/h2database/issues/detail?id=50
@roadmap_1351_li
@roadmap_1347_li
#CSV: currently # is a line comment and can start at any field. Make it optional.
@roadmap_1352_li
@roadmap_1348_li
#Add database creation date and time to the database.
