JdbcPreparedStatement.toString() could throw a NullPointerException.
@changelog_1003_li
@changelog_1005_li
EclipseLink: Added H2Platform.supportsIdentity().
@changelog_1004_li
@changelog_1006_li
Connection pool: the default login timeout is now 5 minutes.
@changelog_1005_li
@changelog_1007_li
After truncating tables, opening large databases could become slow because indexes were always re-built unnecessarily when opening.
@changelog_1006_li
@changelog_1008_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_1007_li
@changelog_1009_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_1008_li
@changelog_1010_li
Improved error message when the .lock.db file modification time is in the future.
@changelog_1009_li
@changelog_1011_li
The MERGE statement now returns 0 as the generated key if the row was updated.
@changelog_1010_li
@changelog_1012_li
Running code coverage is now automated.
@changelog_1011_li
A file system implementation can now be registered using FileSystem.register. The database file system is no longer included in the jar file, it moved to the test section.
@changelog_1013_li
A file system implementation can now be registered using FileSystem.register.
@changelog_1014_li
The database file system is no longer included in the jar file, it moved to the test section.
@changelog_1012_h2
@changelog_1015_h2
Version 1.1.111 (2009-04-10)
@changelog_1013_li
@changelog_1016_li
In-memory databases can now run inside the Google App Engine.
@changelog_1014_li
@changelog_1017_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_1015_li
@changelog_1018_li
The wrong exception was thrown when using unquoted text for the SQL statements COMMENT, ALTER USER, and SET PASSWORD.
@changelog_1016_li
@changelog_1019_li
The built-in connection pool did not roll back transactions and enable autocommit enabled after closing a connection.
@changelog_1017_li
@changelog_1020_li
Sometimes a StackOverflow occurred when checking for deadlock. See also http://code.google.com/p/h2database/issues/detail?id=61
@changelog_1018_li
@changelog_1021_li
The Shell tool no longer truncates results with only one column, and displays a message if data was truncated.
@changelog_1019_h2
@changelog_1022_h2
Version 1.1.110 (2009-04-03)
@changelog_1020_li
@changelog_1023_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_1021_li
@changelog_1024_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_1022_li
@changelog_1025_li
The data type of a SUBSTRING method was wrong.
@changelog_1023_li
@changelog_1026_li
ResultSet.findColumn and get methods with column label parameters now also check for matching column names (like most databases except MySQL).
@changelog_1024_li
@changelog_1027_li
H2 Console: the browser system property now supports a list of arguments. Example: java -Dh2.browser="open,-a,Safari,%url" ...
@changelog_1025_li
@changelog_1028_li
Improved Javadoc navigation (similar to Scaladoc).
@changelog_1026_li
@changelog_1029_li
H2 Console: auto-complete of identifiers did not work correctly for H2 databases in MySQL mode.
@changelog_1027_li
@changelog_1030_li
DISTINCT and GROUP BY on a CLOB column was broken.
@changelog_1028_li
@changelog_1031_li
The FTP server moved to the tools section and is no longer included in the h2*.jar file.
@changelog_1029_li
@changelog_1032_li
Improved error message for unsupported features: now the message says what exactly is not supported.
@changelog_1030_li
@changelog_1033_li
Improved OSGi support.
@changelog_1031_li
@changelog_1034_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_1032_li
@changelog_1035_li
The API of the tools changed a bit (each tool now returns an exit code).
@changelog_1033_li
@changelog_1036_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_1034_li
@changelog_1037_li
CREATE TABLE: improved compatibility (support for UNIQUE NOT NULL).
@changelog_1035_li
@changelog_1038_li
DatabaseMetaData.getSQLKeywords now returns the correct list.
@changelog_1036_li
@changelog_1039_li
Deterministic user defined functions did not work when the parameter was a column. Fixed.
@changelog_1037_li
@changelog_1040_li
JdbcConnectionPool.setLoginTimeout with 0 now uses the default timeout.
@changelog_1038_li
@changelog_1041_li
Creating a JdbcConnectionPool has been simplified a bit.
@changelog_1039_li
@changelog_1042_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_1040_li
@changelog_1043_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_1041_li
@changelog_1044_li
Linked tables to SQLite database can now be created.
@changelog_1042_li
@changelog_1045_li
Nested IN(IN(...)) didn't work.
@changelog_1043_li
@changelog_1046_li
NIO storage: the nio: prefix was using memory mapped files instead of FileChannel.
@changelog_1044_h2
@changelog_1047_h2
Version 1.1.109 (2009-03-14)
@changelog_1045_li
@changelog_1048_li
The optimization for IN(...) is now only used if comparing a column with an index.
@changelog_1046_li
@changelog_1049_li
User defined functions can now be deterministic (see CREATE ALIAS documentation).
@changelog_1047_li
@changelog_1050_li
Multiple nested queries in the FROM clause with parameters did not always work.
@changelog_1048_li
@changelog_1051_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_1049_li
@changelog_1052_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_1050_li
@changelog_1053_li
The functions BITOR, BITAND, BITXOR, and MOD now accept and return BIGINT instead of INT.
@changelog_1051_li
@changelog_1054_li
Could not use the same linked table multiple times in the same query.
@changelog_1052_li
@changelog_1055_li
Bugs in the server-less multi-connection mode have been fixed.
@changelog_1053_li
@changelog_1056_li
Column names could not be named "UNIQUE" (with the quotes).
@changelog_1054_li
@changelog_1057_li
New system function TRANSACTION_ID() to get the current transaction identifier for a session.
@changelog_1055_h2
@changelog_1058_h2
Version 1.1.108 (2009-02-28)
@changelog_1056_li
@changelog_1059_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_1057_li
@changelog_1060_li
JdbcConnectionPool: it was possible to set a negative connection pool size.
@changelog_1058_li
@changelog_1061_li
Fulltext search did not support table names with a backslash.
@changelog_1059_li
@changelog_1062_li
The internal IntArray class did not work correctly when initialized with a zero length array.
@changelog_1060_li
@changelog_1063_li
The H2 Console web application (war file) did only support ASCII characters. Now UTF-8 is supported.
@changelog_1061_li
@changelog_1064_li
DATEADD does no longer require that the argument is a timestamp.
@changelog_1062_li
@changelog_1065_li
The database file locking mechanism didn't work correctly on Mac OS.
@changelog_1063_li
@changelog_1066_li
Some built-in functions reported the wrong precision, scale, and display size.
@changelog_1064_li
@changelog_1067_li
MySQL compatibility for CREATE TABLE is improved (UNSIGNED, KEY).
@changelog_1065_li
@changelog_1068_li
Recovery did not work if there were more than 255 lobs stored as files.
@changelog_1066_li
@changelog_1069_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_1067_li
@changelog_1070_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_1068_li
@changelog_1071_li
The WebServlet did not close the database when un-deploying the web application.
@changelog_1069_li
@changelog_1072_li
The exception message of failed INSERT or MERGE statements now includes all values and the row number.
@changelog_1070_li
@changelog_1073_li
If opening a database failed with an out of memory exception, some files were not closed.
@changelog_1071_li
@changelog_1074_li
Optimizer: the expected runtime calculation was incorrect. The fixed calculation should give slightly better query plans when using many joins.
@changelog_1072_li
@changelog_1075_li
Improved exception message when connecting to a just started server fails.
@changelog_1073_li
@changelog_1076_li
Connection.isValid is a bit faster.
@changelog_1074_li
@changelog_1077_li
H2 Console: The autocomplete feature has been improved a bit. It can now better parse conditions.
@changelog_1075_li
@changelog_1078_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_1076_h2
@changelog_1079_h2
Version 1.1.107 (2009-01-24)
@changelog_1077_li
@changelog_1080_li
Some DatabaseMetaData operations did not work for non-admin users for versions 1.1.x.
@changelog_1078_li
@changelog_1081_li
The MySQL compatibility extension fromUnixTime now used the English locale.
@changelog_1079_li
@changelog_1082_li
When using LOG=2 and repeatedly updating the last row rows of a table, the index file grew quickly.
@changelog_1080_li
@changelog_1083_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_1081_li
@changelog_1084_li
Enabling the trace mechanism by creating a specially named file is no longer supported.
@changelog_1082_h2
@changelog_1085_h2
Version 1.1.106 (2009-01-04)
@changelog_1083_li
@changelog_1086_li
Statement.setQueryTimeout did not work correctly for some statements.
@changelog_1084_li
@changelog_1087_li
CREATE DOMAIN: Built-in data types can now only be changed if no tables exist.
@changelog_1085_li
@changelog_1088_li
Linked tables: a workaround for Oracle DATE columns has been implemented.
@changelog_1086_li
@changelog_1089_li
DatabaseMetaData.getPrimaryKeys: The column PK_NAME now contains the constraint name instead of the index name (compatibility for PostgreSQL and Derby).
@changelog_1087_li
@changelog_1090_li
Using IN(..) inside a IN(SELECT..) did not always work.
@changelog_1088_li
@changelog_1091_li
Views with IN(..) that used a view itself did not work.
@changelog_1089_li
@changelog_1092_li
Union queries with LIMIT or ORDER BY that are used in a view or subquery did not work.
@changelog_1090_li
@changelog_1093_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_1091_li
@changelog_1094_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_1092_li
@changelog_1095_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_1093_h2
@changelog_1096_h2
Version 1.1.105 (2008-12-19)
@changelog_1094_li
@changelog_1097_li
The setting STORAGE=TEXT is no longer supported.
@changelog_1095_li
@changelog_1098_li
Deleting a database using the tool DeleteDbFiles deleted LOB files of other databases in the same directory.
@changelog_1096_li
@changelog_1099_li
When used in a subquery, LIKE and IN(..) did not work correctly sometimes.
@changelog_1097_li
@changelog_1100_li
The fulltext search documentation has been improved.
@changelog_1098_li
@changelog_1101_li
ARRAY_GET returned the wrong data type (ARRAY). Now it returns VARCHAR.
@changelog_1099_li
@changelog_1102_li
Natural join: the joined columns are not repeated any more when using SELECT *.
@changelog_1100_li
@changelog_1103_li
User defined aggregate functions: the method getType expected internal data types instead of SQL types.
@changelog_1101_li
@changelog_1104_li
User defined aggregate functions did not work if there was no group by expression.
@changelog_1102_li
@changelog_1105_li
MySQL compatibility: support for := assignment as in @sum:=@sum+x
@changelog_1103_li
@changelog_1106_li
INSERT INTO TEST(SELECT * FROM TEST) is now supported.
@changelog_1104_li
@changelog_1107_li
Each session threw an invisible exception when garbage collected.
@changelog_1105_li
@changelog_1108_li
Foreign key constraints that refer to a quoted column did not work.
@changelog_1106_li
@changelog_1109_li
New meta data column INFORMATION_SCHEMA.TABLES.LAST_MODIFICATION to get the table modification counter.
@changelog_1107_li
@changelog_1110_li
Shell: line comments didn't work correctly.
@changelog_1108_li
@changelog_1111_li
H2 Console: Columns are now listed for up to 500 tables instead of 100.
@changelog_1109_li
@changelog_1112_li
H2 Console: Cmd+Enter executes the current statement, Alt+Space for autocomplete.
@changelog_1110_li
@changelog_1113_li
JaQu: the maximum length of a column can now be defined using maxLength. For an example, see Product.java (maxLength(category, 255)).
@changelog_1111_li
@changelog_1114_li
R&\#305;dvan A&\#287;ar has completed the Turkish translation of the H2 Console. Thanks a lot!
@changelog_1112_h2
@changelog_1115_h2
Version 1.1.104 (2008-11-28)
@changelog_1113_li
@changelog_1116_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_1114_li
@changelog_1117_li
JaQu: tables are now auto-created when running a query.
@changelog_1115_li
@changelog_1118_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_1116_li
@changelog_1119_li
The function SUM could overflow when using large values. It returns now a data type that is safe.
@changelog_1117_li
@changelog_1120_li
The function AVG could overflow when using large values. Fixed.
@changelog_1118_li
@changelog_1121_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_1119_li
@changelog_1122_li
Build: JAVA_HOME is now automatically detected on Mac OS X.
@changelog_1120_li
@changelog_1123_li
Testing for local connections was very slow on some systems.
@changelog_1121_li
@changelog_1124_li
The cache memory usage calculation is more conservative.
@changelog_1122_li
@changelog_1125_li
Allocating space got slower and slower the larger the database.
@changelog_1123_li
@changelog_1126_li
ALTER TABLE ALTER COLUMN could throw the wrong exception in the last version (Table not found).
@changelog_1124_li
@changelog_1127_li
Updatable result sets: the key columns can now be updated.
@changelog_1125_li
@changelog_1128_li
The H2DatabaseProvider for ActiveObjects is now included in the tools section.
@changelog_1126_li
@changelog_1129_li
The H2Platform for Oracle Toplink Essential has been improved a bit.
@changelog_1127_li
@changelog_1130_li
The Windows service to start H2 didn't work in version 1.1.
@changelog_1128_li
@changelog_1131_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_1129_li
@changelog_1132_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_1130_li
@changelog_1133_li
Compatibility for MS SQL Server DATEDIFF(YYYY, .., ..)
@changelog_1131_li
@changelog_1134_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_1132_li
@changelog_1135_li
The interface CloseListener has a new method 'remove' that is called when the trigger is dropped.
@changelog_1133_li
@changelog_1136_li
Fulltext search: there was a memory leak when creating and dropping fulltext indexes in a loop.
@changelog_1134_h2
@changelog_1137_h2
Version 1.1.103 (2008-11-07)
@changelog_1135_li
@changelog_1138_li
Could not order by a formula when the formula was in the group by list but not in the select list.
@changelog_1136_li
@changelog_1139_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_1137_li
@changelog_1140_li
ALTER TABLE used a lot of memory when using multi-version concurrency.
@changelog_1138_li
@changelog_1141_li
Referential integrity for in-memory databases didn't work in some cases in version 1.1.102.
@changelog_1139_li
@changelog_1142_li
New column INFORMATION_SCHEMA.COLUMNS.SEQUENCE_NAME to get the name of the sequence for auto-increment columns.
@changelog_1140_li
@changelog_1143_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_1141_li
@changelog_1144_li
The Japanese translation has been completed by Masahiro Ikemoto. Thanks a lot!
@changelog_1142_li
@changelog_1145_li
Improved PostgreSQL compatibility for NEXTVAL and CURRVAL.
@changelog_1143_li
@changelog_1146_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_1144_li
@changelog_1147_li
New system property h2.browser to set the browser to use.
@changelog_1145_li
@changelog_1148_li
To start the browser, java.awt.Desktop.browse is now used if available.
@changelog_1146_h2
@changelog_1149_h2
Version 1.1.102 (2008-10-24)
@changelog_1147_li
@changelog_1150_li
The French translation of the H2 Console has been improved by Olivier Parent. Thanks a lot!
@changelog_1148_li
@changelog_1151_li
There was a memory leak when creating and dropping tables and indexes in a loop (persistent database only).
@changelog_1149_li
@changelog_1152_li
SET LOG 2 was not effective if executed after opening the database.
@changelog_1150_li
@changelog_1153_li
Translating the H2 Console is now simpler.
@changelog_1151_li
@changelog_1154_li
Common exception (error code 23*) are no longer written to the .trace.db file by default.
@changelog_1152_li
@changelog_1155_li
In-memory databases don't write LOBs to files any longer.
@changelog_1153_li
@changelog_1156_li
Self referencing constraints didn't restrict deleting rows that reference itself if there is another row that references it.
@changelog_1154_li
@changelog_1157_li
ResultSetMetaData.getColumnName now returns the alias name except for columns.
@changelog_1155_li
@changelog_1158_li
Temporary files are now deleted when the database is closed, even if they were not garbage collected so far.
@changelog_1156_h2
@changelog_1159_h2
Version 1.1.101 (2008-10-17)
@changelog_1157_li
@changelog_1160_li
Errors with code 42000 - 42999 are no longer written to the trace file by default.
@changelog_1158_li
@changelog_1161_li
Queries with more than 10 tables are now faster.
@changelog_1159_li
@changelog_1162_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_1160_li
@changelog_1163_li
IF [NOT] EXISTS is supported for named constraints in ALTER TABLE ... ADD/DROP CONSTRAINT.
@changelog_1161_li
@changelog_1164_li
The error messages have been translated to Spanish by Dario V. Fassi. Thanks a lot!
@changelog_1162_li
@changelog_1165_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_1163_li
@changelog_1166_li
Opening large database is now faster.
@changelog_1164_li
@changelog_1167_li
New system property h2.socketConnectTimeout, the timeout in milliseconds to connect to a server. The default is 2000 (2 seconds).
@changelog_1165_li
@changelog_1168_li
The wrong parameters were bound to subqueries with parameters, specially when using IN(SELECT ...) and IN(...).
@changelog_1166_li
@changelog_1169_li
Unset parameters were not detected when the query was re-compiled.
@changelog_1167_li
@changelog_1170_li
New functions ISO_YEAR, ISO_WEEK, ISO_DAY_OF_WEEK. Thanks a lot to Robert Rathsack for implementing those!
@changelog_1168_li
@changelog_1171_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_1169_li
@changelog_1172_li
An out of memory error while deleting or updating many rows could result in a strange exception.
@changelog_1170_li
@changelog_1173_li
Linked tables: compatibility with MS SQL Server has been improved.
@changelog_1171_li
@changelog_1174_li
Renaming tables that have foreign keys with cascade didn't work correctly.
@changelog_1172_li
@changelog_1175_li
The auto-reconnect feature didn't work when using the auto-server mode. Fixed.
@changelog_1173_li
@changelog_1176_li
Fulltext search: new method FT_DROP_INDEX.
@changelog_1174_li
@changelog_1177_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_1175_li
@changelog_1178_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_1176_li
@changelog_1179_li
The default value for MAX_MEMORY_UNDO is now 50000.
@changelog_1177_li
@changelog_1180_li
For alias columns, ResultSetMetaData.getTableName() and getColumnName() now return the real table and column name in the default mode.
@changelog_1178_li
@changelog_1181_li
In SQL scripts created with SCRIPT TO, schemas are now only created if they don't exist yet.
@changelog_1179_li
@changelog_1182_li
After re-connecting to a database, the database event listener (if set) is informed about it.
@changelog_1180_li
@changelog_1183_li
Local temporary tables now support indexes. Thanks a lot to Matt Roy!
@changelog_1181_li
@changelog_1184_li
RUNSCRIPT no longer uses a temporary file.
@changelog_1182_li
@changelog_1185_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_1183_li
@changelog_1186_li
After an automatic re-connect, part of the session state stays (the part that is stored in the SESSION_STATE table).
@changelog_1184_li
@changelog_1187_li
The build didn't work if the directory temp didn't exist before.
@changelog_1185_li
@changelog_1188_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_1186_li
@changelog_1189_li
WHERE .. IN (SELECT ...) could throw a NullPointerException.
@changelog_1187_li
@changelog_1190_li
Improved Glassfish / Toplink support in H2Platform thanks to Marcio Borges from Brazil. Thanks a lot!
@changelog_1188_h2
@changelog_1191_h2
Version 1.1.100 (2008-10-04)
@changelog_1189_li
@changelog_1192_li
In version 1.1, the following system properties are now enabled by default: h2.lobFilesInDirectories, h2.optimizeGroupSorted, h2.optimizeInJoin, h2.shareLinkedConnections
@changelog_1190_li
@changelog_1193_li
The H2 Console tool now works with the JDBC-ODBC bridge.
@changelog_1191_li
@changelog_1194_li
The H2 Console tool now supports command line options to start things separately.
@changelog_1192_li
@changelog_1195_li
Large objects did not work for in-memory databases in server mode in Linux.
@changelog_1193_li
@changelog_1196_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_1194_li
@changelog_1197_li
The h2console.war can now be built using the Java build.
@changelog_1195_li
@changelog_1198_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_1196_li
@changelog_1199_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_1197_li
@changelog_1200_li
CreateCluster: the property 'serverlist' is now called 'serverList'.
@changelog_1198_li
@changelog_1201_li
The ConvertTraceFile tool could not parse some files because the trace mechanism did not encode prepared statement parameters.
@changelog_1199_li
@changelog_1202_li
Databases names can now be one character long (the minimum size used to be 2 characters).
@changelog_1200_h2
@changelog_1203_h2
Version 1.0.79 (2008-09-26)
@changelog_1201_li
@changelog_1204_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_1202_li
@changelog_1205_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_1203_li
@changelog_1206_li
The server tool now displays the correct IP address if networked.
@changelog_1204_li
@changelog_1207_li
Can now start a TCP server with port 0 (automatically select a port).
@changelog_1205_li
@changelog_1208_li
Result sets with just a unique index can now be updated (previously a primary key was required).
@changelog_1206_li
@changelog_1209_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_1207_li
@changelog_1210_li
LINKED TABLE: worked around a bug in Oracle with the CHAR data type.
@changelog_1208_li
@changelog_1211_li
Faster hash code calculation for large binary arrays.
@changelog_1209_li
@changelog_1212_li
Faster storage re-use algorithm thanks to Greg Dhuse from cleversafe.com.
@changelog_1210_li
@changelog_1213_li
The database supports the SHOW command for better MySQL and PostgreSQL compatibility.
@changelog_1211_li
@changelog_1214_li
The H2 Console now abbreviates large texts in results.
@changelog_1212_li
@changelog_1215_li
Multiple UNION queries could not be used in derived tables.
@changelog_1213_li
@changelog_1216_li
Linked tables can now be read-only.
@changelog_1214_li
@changelog_1217_li
Temporary linked tables are now supported.
@changelog_1215_li
@changelog_1218_li
It was possible to create tables in read-only databases.
@changelog_1216_li
@changelog_1219_li
SET SCHEMA_SEARCH_PATH is now documented.
@changelog_1217_li
@changelog_1220_li
SET SCHEMA did not work for views.
@changelog_1218_li
@changelog_1221_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_1219_li
@changelog_1222_li
The maximum log file size setting was ignored for large databases.
@changelog_1220_li
@changelog_1223_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_1221_li
@changelog_1224_li
The data type JAVA_OBJECT could not be used in updatable result sets.
@changelog_1222_li
@changelog_1225_li
The system property h2.optimizeInJoin did not work correctly.
@changelog_1223_li
@changelog_1226_li
Conditions such as ID=? AND ID>? were slow.
@changelog_1224_h2
@changelog_1227_h2
Version 1.0.78 (2008-08-28)
@changelog_1225_li
@changelog_1228_li
The documentation no longer uses a frameset (except the Javadocs).
@changelog_1226_li
@changelog_1229_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_1227_li
@changelog_1230_li
Java methods with variable number of parameters can now be used (for Java 1.5 or newer).
@changelog_1228_li
@changelog_1231_li
The Japanese translation has been improved by Masahiro Ikemoto. Thanks a lot!
@changelog_1229_li
@changelog_1232_li
The H2 Console replaced an empty user name with a single space.
@changelog_1230_li
@changelog_1233_li
The build target 'build jarSmall' now includes the embedded database.
@changelog_1231_li
@changelog_1234_li
JdbcDataSource now keeps the password in a char array where possible.
@changelog_1232_li
@changelog_1235_li
ResultSet.absolute did not always work with large result sets.
@changelog_1233_li
@changelog_1236_li
Column aliases can now be used in GROUP BY and HAVING.
@changelog_1234_li
@changelog_1237_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_1235_h2
@changelog_1238_h2
Version 1.0.77 (2008-08-16)
@changelog_1236_li
@changelog_1239_li
JaQu is now using prepared statements and supports Date, Time, Timestamp.
@changelog_1237_li
@changelog_1240_li
When using remote in-memory databases, large LOB objects did not work.
@changelog_1238_li
@changelog_1241_li
Timestamp columns such as TIMESTAMP(6) were not compatible to other database.
@changelog_1239_li
@changelog_1242_li
Opening a large database was slow if there was a problem opening the previous time.
@changelog_1240_li
@changelog_1243_li
NOT IN(SELECT ...) was incorrect if the subquery returns no rows.
@changelog_1241_li
@changelog_1244_li
CREATE TABLE AS SELECT did not work correctly in the multi-version concurrency mode.
@changelog_1242_li
@changelog_1245_li
Support a comma before closing a list, as in: create table test(id int,)
@changelog_1243_li
@changelog_1246_li
MySQL compatibility: linked tables had lower case column names on some systems.
@changelog_1244_li
@changelog_1247_li
DB2 compatibility: the DB2 fetch-first-clause is supported.
@changelog_1245_li
@changelog_1248_li
Oracle compatibility: old style outer join syntax using (+) did work correctly sometimes.
@changelog_1246_li
@changelog_1249_li
ResultSet.setFetchSize is now supported.
@changelog_1247_li
@changelog_1250_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_1248_h2
@changelog_1251_h2
Version 1.0.76 (2008-07-27)
@changelog_1249_li
@changelog_1252_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_1250_li
@changelog_1253_li
Invalid database names are now detected and a better error message is thrown.
@changelog_1251_li
@changelog_1254_li
ResultSetMetaData.getColumnClassName now returns the correct class name for BLOB and CLOB.
@changelog_1252_li
@changelog_1255_li
Fixed the Oracle mode: Oracle allows multiple rows only where all columns of the unique index are NULL.
@changelog_1253_li
@changelog_1256_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_1254_li
@changelog_1257_li
ORDER BY on tableName.columnName didn't work correctly if the column name was also used as an alias.
@changelog_1255_li
@changelog_1258_li
H2 Console: The progress display when opening a database has been improved.
@changelog_1256_li
@changelog_1259_li
The error message when the server doesn't start has been improved.
@changelog_1257_li
@changelog_1260_li
Key values can now be changed in updatable result sets.
@changelog_1258_li
@changelog_1261_li
Changes in updatable result sets are now visible even when resetting the result set.
@changelog_1259_li
@changelog_1262_li
Temporary files were sometimes deleted too late when executing large insert, update, or delete operations.
@changelog_1260_li
@changelog_1263_li
The database file was growing after deleting many rows, and after large update operations.
@changelog_1261_h2
@changelog_1264_h2
Version 1.0.75 (2008-07-14)
@changelog_1262_li
@changelog_1265_li
Multi version concurrency (MVCC): when a row was updated or deleted, but this change was rolled back, the row was not visible by other sessions if no index was used to access it. Fixed.
@changelog_1263_li
@changelog_1266_li
Views with multiple joined tables (where one was an outer join) couldn't be used in some cases. Fixed.
@changelog_1264_li
@changelog_1267_li
The CSVREAD method did not process NULL correctly when using a whitespace field separator.
@changelog_1265_li
@changelog_1268_li
Fixed the Oracle mode: Oracle allows multiple rows with NULL in a unique index.
@changelog_1266_li
@changelog_1269_li
Running out of memory could result in incomplete transactions or corrupted databases. Fixed.
@changelog_1267_li
@changelog_1270_li
When using order by in a query that uses the same table multiple times, the order could be incorrect. Fixed.
@changelog_1268_li
@changelog_1271_li
Referential constraint checking improvement: now the constraint is only checked if the key column values change.
@changelog_1269_li
@changelog_1272_li
Some database metadata calls returned the wrong data type for DATA_TYPE columns.
@changelog_1270_li
@changelog_1273_li
The Lucene fulltext index was empty when opening a database with fulltext index enabled, and re-indexing it didn't work. Fixed.
@changelog_1271_li
@changelog_1274_li
The character '$' could not be used in identifier names (table name, column names and so on). Fixed.
@changelog_1272_li
@changelog_1275_li
The new method org.h2.tools.Server.startWebServer(conn) starts the H2 Console to inspect a database while debugging.
@changelog_1273_li
@changelog_1276_li
Stopping a WebServer didn't always work. Fixed.
@changelog_1274_h2
@changelog_1277_h2
Version 1.0.74 (2008-06-21)
@changelog_1275_li
@changelog_1278_li
Work on row level locking has been started (but there is nothing usable yet).
@changelog_1276_li
@changelog_1279_li
JaQu (Java Query), a tool similar to LINQ (Language Integrated Query; from Microsoft) is now included under src/tools/org/h2/jaqu. A small sample application is included under src/test/org/h2/test/jaqu.
@changelog_1277_li
@changelog_1280_li
The source code is now switched to Java 1.6 by default. To switch back to Java 1.4, run 'build compile'. The h2.jar file is still Java 1.4.
@changelog_1278_li
@changelog_1281_li
The ChangePassword tool is now called ChangeFileEncryption.
@changelog_1279_li
@changelog_1282_li
It is no longer allowed to create columns with the data type NULL. Also, it is no longer allowed to convert a column to the data type NULL. This was possible before but caused data loss.
@changelog_1280_li
@changelog_1283_li
When using computed columns or default values with a different data type than the column data type, a class cast exception could occur. Fixed.
@changelog_1281_li
@changelog_1284_li
Opening databases larger than 1 GB was sometimes very slow if a lot of data was deleted previously. Fixed.
@changelog_1282_li
@changelog_1285_li
RUNSCRIPT could throw a NullPointerException if the script name was an expression.
@changelog_1283_li
@changelog_1286_li
Improved compatibility. New compatibility modes for Oracle and Derby. New compatibility flag uniqueIndexNullDistinct to only allow one row with 'NULL' in a unique index. This flag is enabled for Derby, Oracle, MSSQLServer, and HSQLDB.
@changelog_1284_li
@changelog_1287_li
Linked tables: To view the statements that are executed against the target table, set the trace level to 3.
@changelog_1285_li
@changelog_1288_li
RunScript tool: new options to show and check the results of queries.
@changelog_1286_li
@changelog_1289_li
Deadlocks are now detected. One transaction is rolled back automatically.
@changelog_1287_li
@changelog_1290_li
The Lucene fulltext index was always re-created when opening a database with fulltext index enabled.
@changelog_1288_li
@changelog_1291_li
Support for overloaded Java methods. A user defined function can now be bound to multiple Java methods, if the Java methods have the same name but a different number of parameters. Thanks to Gary Tong for providing a patch!
@changelog_1289_h2
@changelog_1292_h2
Version 1.0.73 (2008-05-31)
@changelog_1290_li
@changelog_1293_li
ParameterMetaData now returns the right data type for most conditions, as in WHERE ID=?.
@changelog_1291_li
@changelog_1294_li
The table SYSTEM_RANGE now supports expressions and parameters.
@changelog_1292_li
@changelog_1295_li
New column INFORMATION_SCHEMA.CONSTRAINTS.UNIQUE_INDEX_NAME that contains the name of the unique index used to enforce this constraint, if there is such an index.
@changelog_1293_li
@changelog_1296_li
SET QUERY_TIMEOUT and Statement.setQueryTimeout no longer commits a transaction. The same applies to SET @VARIABLE, SET LOCK_TIMEOUT, SET TRACE_LEVEL_*, SET THROTTLE, and SET PATH.
@changelog_1294_li
@changelog_1297_li
The SCRIPT command does now emit IF NOT EXISTS for CREATE ROLE.
@changelog_1295_li
@changelog_1298_li
MySQL compatibility: auto_increment column are no longer automatically converted to primary key columns.
@changelog_1296_li
@changelog_1299_li
PostgreSQL compatibility: support for BOOL_OR and BOOL_AND aggregate functions.
@changelog_1297_li
@changelog_1300_li
Negative scale values for DECIMAL or NUMBER columns are now supported in regular tables and in linked tables.
@changelog_1298_li
@changelog_1301_li
A role or right can now be granted or revoked multiple times without getting an exception.
@changelog_1299_li
@changelog_1302_li
Infinite numbers in SQL scripts are listed as POWER(0, -1)), negative infinite as (-POWER(0, -1)), and NaN (not a number) as SQRT(-1).
@changelog_1300_li
@changelog_1303_li
The special double and float values 'NaN' (not a number) did not work correctly when sorting or comparing.
@changelog_1301_li
@changelog_1304_li
The fulltext search did not support CLOB data types.
@changelog_1302_li
@changelog_1305_li
If the drive with the database files was disconnected or unmounted while writing, sometimes a stack overflow exception was thrown instead of a IO exception.
@changelog_1303_li
@changelog_1306_li
The H2 Console could not be shut down from within the tool if the browser supports keepAlive (most browsers do).
@changelog_1304_li
@changelog_1307_li
If the password was passed as a char array, it was kept in an internal buffer longer than required. Theoretically the password could have been stolen if the main memory was swapped to disk before the garbage collection was run.
@changelog_1305_h2
@changelog_1308_h2
Version 1.0.72 (2008-05-10)
@changelog_1306_li
@changelog_1309_li
Some databases could not be opened when appending ;RECOVER=1 to the database URL.
@changelog_1307_li
@changelog_1310_li
The Japanese translation of the error messages and the H2 Console has been completed by Masahiro Ikemoto (Arizona Design Inc.)
@changelog_1308_li
@changelog_1311_li
Updates made to updatable rows are now visible within the same result set. DatabaseMetaData.ownUpdatesAreVisible now returns true.
@changelog_1309_li
@changelog_1312_li
ParameterMetaData now returns the correct data for INSERT and UPDATE statements.
@changelog_1310_li
@changelog_1313_li
H2 Shell: DESCRIBE now supports an schema name.
@changelog_1311_li
@changelog_1314_li
A subset of the PostgreSQL 'dollar quoting' feature is now supported.
@changelog_1312_li
@changelog_1315_li
SLF4J is now supported by using adding TRACE_LEVEL_FILE=4 to the database URL.
@changelog_1313_li
@changelog_1316_li
The recovery tool did not work if the table name contained spaces or if there was a comment on the table.
@changelog_1314_li
@changelog_1317_li
Triggers are no longer executed when changing the table structure (ALTER TABLE).
@changelog_1315_li
@changelog_1318_li
When setting BLOB or CLOB values larger than 65 KB using a remote connection, temporary files were kept on the client longer than required (until the connection was closed or the object is garbage collected). Now they are removed as soon as the PreparedStatement is closed, or when the value is overwritten.
@changelog_1316_li
@changelog_1319_li
Statements can now be canceled remotely (when using remote connections).
@changelog_1317_li
@changelog_1320_li
The Shell tool now uses java.io.Console to read the password when using JDK 1.6
@changelog_1318_li
@changelog_1321_li
When using read-only databases and setting LOG=2, an exception was written to the trace file when closing the database. Fixed.
@changelog_1319_h2
@changelog_1322_h2
Version 1.0.71 (2008-04-25)
@changelog_1320_li
@changelog_1323_li
H2 is now dual-licensed under the Eclipse Public License (EPL) and the old 'H2 License' (which is basically MPL).
@changelog_1321_li
@changelog_1324_li
Sometimes an exception 'File ID mismatch' or 'try to add a record twice' occurred after large records (8 KB or larger) are updated or deleted. See also http://code.google.com/p/h2database/issues/detail?id=22
@changelog_1322_li
@changelog_1325_li
H2 Console: The tools can now be translated (it didn't work in the last release).
@changelog_1323_li
@changelog_1326_li
New traditional Chinese translation. Thanks a lot to Derek Chao!
@changelog_1324_li
@changelog_1327_li
Indexes were not used when enabling the optimization for IN(SELECT...) (system property h2.optimizeInJoin).
@changelog_1325_h2
@changelog_1328_h2
Version 1.0.70 (2008-04-20)
@changelog_1326_li
@changelog_1329_li
The plan is to dual-license H2. The additional license is EPL (Eclipse Public License). The current license (MPL, Mozilla Public License) will stay. Current users are not affected because they can keep MPL. EPL is very similar to MPL, the only bigger difference is related to patents (EPL is a bit more business friendly in this regard). See also http://opensource.org/licenses/eclipse-1.0.php, http://www.eclipse.org/legal/eplfaq.php (FAQ), http://blogs.zdnet.com/Burnette/?p=131
@changelog_1327_li
@changelog_1330_li
Multi version concurrency (MVCC): when a row was updated, and the updated column was not indexed, this update was visible sometimes for other sessions even if it was not committed.
@changelog_1328_li
@changelog_1331_li
Calling SHUTDOWN on one connection and starting a query on another connection concurrently could result in a Java level deadlock.
@changelog_1329_li
@changelog_1332_li
New system property h2.enableAnonymousSSL (default: true) to enable anonymous SSL connections.
@changelog_1330_li
@changelog_1333_li
The precision if SUBSTR is now calculated if possible.
@changelog_1331_li
@changelog_1334_li
The autocomplete in the H2 Console has been improved a bit.
@changelog_1332_li
@changelog_1335_li
The tools in the H2 Console are now translatable.
@changelog_1333_li
@changelog_1336_li
The servlet and lucene jar files are now automatically downloaded when building.
@changelog_1334_li
@changelog_1337_li
The code switch tool has been replaced by a simpler tool called SwitchSource that just uses find and replace.
@changelog_1335_li
@changelog_1338_li
Started to write a Ant replacement ('JAnt') that uses pure Java build definitions. Advantages: ability to debug the build, extensible, flexible, no XML, a bit faster. Future plan: support creating custom h2 distributions (for embedded use). Maybe create a new project 'Jant' or 'Javen' if other people are interested.
@changelog_1336_li
@changelog_1339_li
The jar file is now about 10% smaller because the variable debugging info is no longer included. The source file and line number debugging info is still included. If required, the jar file size of the full version can be further reduced to about 720 KB using 'build jarSmall' or even more by removing unneeded components.
@changelog_1337_li
@changelog_1340_li
Added shell scripts run.sh and build.sh. chmod +x is required, but otherwise it should work. Feedback or improvements are welcome!
@changelog_1338_li
@changelog_1341_li
Databases in zip files: large queries are now supported. Temp files are created in the temp directory if required. The documentation how to create the zip file has been corrected.
The Japanese translation of the error messages and the H2 Console has been improved. Thanks a lot to Masahiro IKEMOTO.
@changelog_1341_li
@changelog_1344_li
Optimization for MIN() and MAX() when using MVCC.
@changelog_1342_li
@changelog_1345_li
To protect against remote brute force password attacks, the delay after each unsuccessful login now gets double as long. New system properties h2.delayWrongPasswordMin and h2.delayWrongPasswordMax.
@changelog_1343_li
@changelog_1346_li
After setting the query timeout and then resetting it, the next query would still timeout. Fixed.
@changelog_1344_li
@changelog_1347_li
Adding a IDENTITY column to a table with data threw a lock timeout.
@changelog_1345_li
@changelog_1348_li
OutOfMemoryError could occur when using EXISTS or IN(SELECT ..).
@changelog_1346_li
@changelog_1349_li
The built-in connection pool is not called JdbcConnectionPool. The API and documentation has been changed.
@changelog_1347_li
@changelog_1350_li
The ConvertTraceFile tool now generates SQL statement statistics at the end of the SQL script file (similar to the profiling data generated when using java -Xrunhprof).
@changelog_1348_li
@changelog_1351_li
Nested joins are now supported (A JOIN B JOIN C ON .. ON ..)
@download_1000_h1
Downloads
@download_1001_h3
Version 1.1.111 (2009-04-10)
Version 1.1.112 (2009-05-01)
@download_1002_a
Windows Installer
...
...
@@ -2219,7 +2228,7 @@ Windows Installer
Platform-Independent Zip
@download_1004_h3
Version 1.1.110 (2009-04-03, Last Stable)
Version 1.1.111 (2009-04-10, Last Stable)
@download_1005_a
Windows Installer
...
...
@@ -5834,7 +5843,7 @@ Small footprint: around 1 MB jar file size
Download
@mainWeb_1007_td
Version 1.1.111 (2009-04-10):
Version 1.1.112 (2009-05-01):
@mainWeb_1008_a
Windows Installer (3.3 MB)
...
...
@@ -7907,699 +7916,696 @@ Read InputStream when executing, as late as possible (maybe only embedded mode).
Native fulltext search: min word length; store word positions
@roadmap_1156_li
FTP Server: Implement a client to send / receive files to server (dir, get, put)
Recursive Queries (see details)
@roadmap_1157_li
FTP Server: Implement SFTP / FTPS
Add an option to the SCRIPT command to generate only portable / standard SQL
@roadmap_1158_li
Add an option to the SCRIPT command to generate only portable / standard SQL
Test Dezign for Databases (http://www.datanamic.com)
@roadmap_1159_li
Test Dezign for Databases (http://www.datanamic.com)
Fast library for parsing / formatting: http://javolution.org/
@roadmap_1160_li
Fast library for parsing / formatting: http://javolution.org/
Updatable Views (simple cases first)
@roadmap_1161_li
Updatable Views (simple cases first)
Improve create index performance
@roadmap_1162_li
Improve create index performance
Implement more JDBC 4.0 features
@roadmap_1163_li
Implement more JDBC 4.0 features
Support TRANSFORM / PIVOT as in MS Access
@roadmap_1164_li
Support TRANSFORM / PIVOT as in MS Access
SELECT * FROM (VALUES (...), (...), ....) AS alias(f1, ...)
@roadmap_1165_li
SELECT * FROM (VALUES (...), (...), ....) AS alias(f1, ...)
Support updatable views with join on primary keys (to extend a table)
@roadmap_1166_li
Support updatable views with join on primary keys (to extend a table)
Public interface for functions (not public static)
@roadmap_1167_li
Public interface for functions (not public static)
Autocomplete: if I type the name of a table that does not exist (should say: syntax not supported)
@roadmap_1168_li
Autocomplete: if I type the name of a table that does not exist (should say: syntax not supported)
Document FTP server, including -ftpTask option to execute / kill remote processes
@roadmap_1169_li
Document FTP server, including -ftpTask option to execute / kill remote processes
Eliminate undo log records if stored on disk (just one pointer per block, not per record)
@roadmap_1170_li
Eliminate undo log records if stored on disk (just one pointer per block, not per record)
Feature matrix like in <a href="http://www.inetsoftware.de/products/jdbc/mssql/features/default.asp">i-net software</a> .
@roadmap_1171_li
Feature matrix like in <a href="http://www.inetsoftware.de/products/jdbc/mssql/features/default.asp">i-net software</a> .
Updatable result set on table without primary key or unique index
@roadmap_1172_li
Updatable result set on table without primary key or unique index
Use LinkedList instead of ArrayList where applicable
@roadmap_1173_li
Use LinkedList instead of ArrayList where applicable
Support % operator (modulo)
@roadmap_1174_li
Support % operator (modulo)
Support 1+'2'=3, '1'+'2'='12' (MS SQL Server compatibility)
@roadmap_1175_li
Support 1+'2'=3, '1'+'2'='12' (MS SQL Server compatibility)
Support nested transactions
@roadmap_1176_li
Support nested transactions
Add a benchmark for big databases, and one for many users
@roadmap_1177_li
Add a benchmark for big databases, and one for many users
Compression in the result set (repeating values in the same column) over TCP/IP
@roadmap_1178_li
Compression in the result set (repeating values in the same column) over TCP/IP
Support curtimestamp (like curtime, curdate)
@roadmap_1179_li
Support curtimestamp (like curtime, curdate)
Support ANALYZE {TABLE|INDEX} tableName COMPUTE|ESTIMATE|DELETE STATISTICS ptnOption options
@roadmap_1180_li
Support ANALYZE {TABLE|INDEX} tableName COMPUTE|ESTIMATE|DELETE STATISTICS ptnOption options
Support Sequoia (Continuent.org)
@roadmap_1181_li
Support Sequoia (Continuent.org)
Dynamic length numbers / special methods for DataPage.writeByte / writeShort / Ronni Nielsen
@roadmap_1182_li
Dynamic length numbers / special methods for DataPage.writeByte / writeShort / Ronni Nielsen
Pluggable ThreadPool, (AvalonDB / deebee / Paul Hammant)
@roadmap_1183_li
Pluggable ThreadPool, (AvalonDB / deebee / Paul Hammant)
Release locks (shared or exclusive) on demand
@roadmap_1184_li
Recursive Queries (see details)
Support OUTER UNION
@roadmap_1185_li
Release locks (shared or exclusive) on demand
Support parameterized views (similar to CSVREAD, but using just SQL for the definition)
@roadmap_1186_li
Support OUTER UNION
A way (JDBC driver) to map an URL (jdbc:h2map:c1) to a connection object
@roadmap_1187_li
Support parameterized views (similar to CSVREAD, but using just SQL for the definition)
Option for SCRIPT to only process one or a set of tables, and append to a file
@roadmap_1188_li
A way (JDBC driver) to map an URL (jdbc:h2map:c1) to a connection object
Support using a unique index for IS NULL (including linked tables)
@roadmap_1189_li
Option for SCRIPT to only process one or a set of tables, and append to a file
Support linked tables to the current database
@roadmap_1190_li
Support using a unique index for IS NULL (including linked tables)
Support dynamic linked schema (automatically adding/updating/removing tables)
@roadmap_1191_li
Support linked tables to the current database
Compatibility with Derby: VALUES(1), (2); SELECT * FROM (VALUES (1), (2)) AS myTable(c1)
@roadmap_1192_li
Support dynamic linked schema (automatically adding/updating/removing tables)
Compatibility: # is the start of a single line comment (MySQL) but date quote (Access). Mode specific
@roadmap_1193_li
Compatibility with Derby: VALUES(1), (2); SELECT * FROM (VALUES (1), (2)) AS myTable(c1)
Run benchmarks with JDK 1.5, JDK 1.6, java -server
@roadmap_1194_li
Compatibility: # is the start of a single line comment (MySQL) but date quote (Access). Mode specific
Optimizations: Faster hash function for strings, byte arrays
@roadmap_1195_li
Run benchmarks with JDK 1.5, JDK 1.6, java -server
DatabaseEventListener: callback for all operations (including expected time, RUNSCRIPT) and cancel functionality
@roadmap_1196_li
Optimizations: Faster hash function for strings, byte arrays
H2 Console / large result sets: use 'streaming' instead of building the page in-memory
@roadmap_1197_li
DatabaseEventListener: callback for all operations (including expected time, RUNSCRIPT) and cancel functionality
Benchmark: add a graph to show how databases scale (performance/database size)
@roadmap_1198_li
H2 Console / large result sets: use 'streaming' instead of building the page in-memory
Implement a SQLData interface to map your data over to a custom object
@roadmap_1199_li
Benchmark: add a graph to show how databases scale (performance/database size)
In the MySQL and PostgreSQL mode, use lower case identifiers by default (DatabaseMetaData.storesLowerCaseIdentifiers = true)
@roadmap_1200_li
Implement a SQLData interface to map your data over to a custom object
Make DDL (Data Definition) operations transactional
@roadmap_1201_li
In the MySQL and PostgreSQL mode, use lower case identifiers by default (DatabaseMetaData.storesLowerCaseIdentifiers = true)
Allow execution time prepare for SELECT * FROM CSVREAD(?, 'columnNameString')
@roadmap_1202_li
Make DDL (Data Definition) operations transactional
Support multiple directories (on different hard drives) for the same database
@roadmap_1203_li
Allow execution time prepare for SELECT * FROM CSVREAD(?, 'columnNameString')
Server protocol: use challenge response authentication, but client sends hash(user+password) encrypted with response
@roadmap_1204_li
Support multiple directories (on different hard drives) for the same database
Support EXEC[UTE] (doesn't return a result set, compatible to MS SQL Server)
@roadmap_1205_li
Server protocol: use challenge response authentication, but client sends hash(user+password) encrypted with response
Support native XML data type
@roadmap_1206_li
Support EXEC[UTE] (doesn't return a result set, compatible to MS SQL Server)
Support triggers with a string property or option: SpringTrigger, OSGITrigger
@roadmap_1207_li
Support native XML data type
Clustering: adding a node should be very fast and without interrupting clients (very short lock)
@roadmap_1208_li
Support triggers with a string property or option: SpringTrigger, OSGITrigger
Support materialized views (using triggers)
@roadmap_1209_li
Clustering: adding a node should be very fast and without interrupting clients (very short lock)
Store dates in local time zone (portability of database files)
@roadmap_1210_li
Support materialized views (using triggers)
Ability to resize the cache array when resizing the cache
@roadmap_1211_li
Store dates in local time zone (portability of database files)
Time based cache writing (one second after writing the log)
@roadmap_1212_li
Ability to resize the cache array when resizing the cache
Check state of H2 driver for DDLUtils: https://issues.apache.org/jira/browse/DDLUTILS-185
@roadmap_1213_li
Time based cache writing (one second after writing the log)
Index usage for REGEXP LIKE.
@roadmap_1214_li
Check state of H2 driver for DDLUtils: https://issues.apache.org/jira/browse/DDLUTILS-185
Compatibility: add a role DBA (like ADMIN).
@roadmap_1215_li
Index usage for REGEXP LIKE.
Better support multiple processors for in-memory databases.
@roadmap_1216_li
Compatibility: add a role DBA (like ADMIN).
Access rights: remember the owner of an object. COMMENT: allow owner of object to change it.
@roadmap_1217_li
Better support multiple processors for in-memory databases.
Access rights: Finer grained access control (grant access for specific functions)
@roadmap_1218_li
Access rights: remember the owner of an object. COMMENT: allow owner of object to change it.
Support N'text'
@roadmap_1219_li
Access rights: Finer grained access control (grant access for specific functions)
Support SCOPE_IDENTITY() to avoid problems when inserting rows in a trigger
@roadmap_1220_li
Support N'text'
Set a connection read only (Connection.setReadOnly)
@roadmap_1221_li
Support SCOPE_IDENTITY() to avoid problems when inserting rows in a trigger
In MySQL mode, for AUTO_INCREMENT columns, don't set the primary key
@roadmap_1222_li
Set a connection read only (Connection.setReadOnly)
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_1223_li
In MySQL mode, for AUTO_INCREMENT columns, don't set the primary key
Support compatibility for jdbc:hsqldb:res:
@roadmap_1224_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).
Provide an Java SQL builder with standard and H2 syntax
@roadmap_1225_li
Support compatibility for jdbc:hsqldb:res:
Trace: write OS, file system, JVM,... when opening the database
@roadmap_1226_li
Provide an Java SQL builder with standard and H2 syntax
Support indexes for views (probably requires materialized views)
@roadmap_1227_li
Trace: write OS, file system, JVM,... when opening the database
Document SET SEARCH_PATH, BEGIN, EXECUTE, parameters
@roadmap_1228_li
Support indexes for views (probably requires materialized views)
Browser: use Desktop.isDesktopSupported and browse when using JDK 1.6
@roadmap_1229_li
Document SET SEARCH_PATH, BEGIN, EXECUTE, parameters
Server: use one listener (detect if the request comes from an PG or TCP client)
@roadmap_1230_li
Browser: use Desktop.isDesktopSupported and browse when using JDK 1.6
Store dates as 'local'. Existing files use GMT. Use escape syntax for compatibility.
@roadmap_1231_li
Server: use one listener (detect if the request comes from an PG or TCP client)
Support data type INTERVAL
@roadmap_1232_li
Store dates as 'local'. Existing files use GMT. Use escape syntax for compatibility.
Optimize SELECT MIN(ID), MAX(ID), COUNT(*) FROM TEST WHERE ID BETWEEN 100 AND 200
@roadmap_1233_li
Support data type INTERVAL
Support Oracle functions: TRUNC, NVL2, TO_CHAR, TO_DATE, TO_NUMBER
@roadmap_1234_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_1259_li
Write an article about SQLInjection (h2\src\docsrc\html\images\SQLInjection.txt)
@roadmap_1261_li
@roadmap_1260_li
Convert SQL-injection-2.txt to html document, include SQLInjection.java sample
@roadmap_1262_li
@roadmap_1261_li
Improve LOB in directories performance
@roadmap_1263_li
@roadmap_1262_li
Web site design: http://www.igniterealtime.org/projects/openfire/index.jsp
@roadmap_1264_li
@roadmap_1263_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_1264_li
Web site: Rename Performance to Comparison [/Compatibility], move Comparison to Other Database Engines to Comparison, move Products that Work with H2 to Comparison, move Performance Tuning to Advanced Topics
@roadmap_1266_li
@roadmap_1265_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
@roadmap_1267_li
@roadmap_1266_li
Translation: use ?? in help.csv
@roadmap_1268_li
@roadmap_1267_li
Translated .pdf
@roadmap_1269_li
@roadmap_1268_li
Cluster: hot deploy (adding a node at runtime)
@roadmap_1270_li
@roadmap_1269_li
MySQL compatibility: update test1 t1, test2 t2 set t1.id = t2.id where t1.id = t2.id;
@roadmap_1271_li
@roadmap_1270_li
Recovery tool: bad blocks should be converted to INSERT INTO SYSTEM_ERRORS(...), and things should go into the .trace.db file
@roadmap_1272_li
@roadmap_1271_li
RECOVER=2 to backup the database, run recovery, open the database
@roadmap_1273_li
@roadmap_1272_li
Recovery should work with encrypted databases
@roadmap_1274_li
@roadmap_1273_li
Corruption: new error code, add help
@roadmap_1275_li
@roadmap_1274_li
Space reuse: after init, scan all storages and free those that don't belong to a live database object
@roadmap_1276_li
@roadmap_1275_li
SysProperties: change everything to H2_...
@roadmap_1277_li
@roadmap_1276_li
Use FilterIn / FilterOut putStream?
@roadmap_1278_li
@roadmap_1277_li
Access rights: add missing features (users should be 'owner' of objects; missing rights for sequences; dropping objects)
@roadmap_1279_li
@roadmap_1278_li
Support NOCACHE table option (Oracle)
@roadmap_1280_li
@roadmap_1279_li
Index usage for UPDATE ... WHERE .. IN (SELECT...)
@roadmap_1281_li
@roadmap_1280_li
Add regular javadocs (using the default doclet, but another css) to the homepage.
@roadmap_1282_li
@roadmap_1281_li
The database should be kept open for a longer time when using the server mode.
@roadmap_1283_li
@roadmap_1282_li
Javadocs: for each tool, add a copy & paste sample in the class level.
@roadmap_1284_li
@roadmap_1283_li
Javadocs: add @author tags.
@roadmap_1285_li
@roadmap_1284_li
Fluent API for tools: Server.createTcpServer().setPort(9081).setPassword(password).start();
@roadmap_1286_li
@roadmap_1285_li
MySQL compatibility: real SQL statement for DESCRIBE TEST
@roadmap_1287_li
@roadmap_1286_li
Use a default delay of 1 second before closing a database.
@roadmap_1288_li
@roadmap_1287_li
Write (log) to system table before adding to internal data structures.
@roadmap_1289_li
@roadmap_1288_li
Support very large deletes and updates.
@roadmap_1290_li
@roadmap_1289_li
Doclet (javadocs): constructors are not listed.
@roadmap_1291_li
@roadmap_1290_li
Support direct lookup for MIN and MAX when using WHERE (see todo.txt / Direct Lookup).
@roadmap_1292_li
@roadmap_1291_li
Support other array types (String[], double[]) in PreparedStatement.setObject(int, Object);
@roadmap_1293_li
@roadmap_1292_li
MVCC should not be memory bound (uncommitted data is kept in memory in the delta index; maybe using a regular btree index solves the problem).
@roadmap_1294_li
@roadmap_1293_li
Oracle compatibility: support NLS_DATE_FORMAT.
@roadmap_1295_li
@roadmap_1294_li
Support flashback queries as in Oracle.
@roadmap_1296_li
@roadmap_1295_li
Import / Export of fixed with text files.
@roadmap_1297_li
@roadmap_1296_li
Support OUT parameters in user-defined procedures.
@roadmap_1298_li
@roadmap_1297_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_1299_li
@roadmap_1298_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_1300_li
@roadmap_1299_li
Improve the optimizer to select the right index for special cases: where id between 2 and 4 and booleanColumn
@roadmap_1301_li
@roadmap_1300_li
Linked tables: make hidden columns available (Oracle: rowid and ora_rowscn columns).
@roadmap_1302_li
@roadmap_1301_li
Support merge join.
@roadmap_1303_li
@roadmap_1302_li
H2 Console: in-place autocomplete.
@roadmap_1304_li
@roadmap_1303_li
Oracle: support DECODE method (convert to CASE WHEN).
@roadmap_1305_li
@roadmap_1304_li
Support large databases: split LOB (BLOB, CLOB) to multiple directories / disks (similar to tablespaces).
@roadmap_1306_li
@roadmap_1305_li
Support to assign a primary key index a user defined name.
@roadmap_1307_li
@roadmap_1306_li
Cluster: Add feature to make sure cluster nodes can not get out of sync (for example by stopping one process).
@roadmap_1308_li
@roadmap_1307_li
H2 Console: support configuration option for fixed width (monospace) font.
@roadmap_1309_li
@roadmap_1308_li
Native fulltext search: support analyzers (specially for Chinese, Japanese).
@roadmap_1310_li
@roadmap_1309_li
Automatically compact databases from time to time (as a background process).
@roadmap_1311_li
@roadmap_1310_li
Support SCOPE_IDENTITY().
@roadmap_1312_li
@roadmap_1311_li
Support GRANT SELECT, UPDATE ON *.
@roadmap_1313_li
@roadmap_1312_li
Test Eclipse DTP.
@roadmap_1314_li
@roadmap_1313_li
H2 Console: autocomplete: keep the previous setting
@roadmap_1315_li
@roadmap_1314_li
MySQL, MS SQL Server compatibility: support case sensitive (mixed case) identifiers without quotes.
@roadmap_1316_li
@roadmap_1315_li
executeBatch: option to stop at the first failed statement.
@roadmap_1317_li
@roadmap_1316_li
Implement OLAP features as described here: http://www.devx.com/getHelpOn/10MinuteSolution/16573/0/page/5
@roadmap_1318_li
@roadmap_1317_li
Support Oracle ROWID (unique identifier for each row).
@roadmap_1319_li
@roadmap_1318_li
Server mode: Improve performance for batch updates.
@roadmap_1320_li
@roadmap_1319_li
Applets: Support read-only databases in a zip file (accessed as a resource).
@roadmap_1321_li
@roadmap_1320_li
Long running queries / errors / trace system table.
@roadmap_1322_li
@roadmap_1321_li
H2 Console should support JaQu directly.
@roadmap_1323_li
@roadmap_1322_li
H2 Console: support single file upload and directory download (optional).
@roadmap_1324_li
@roadmap_1323_li
Document FTL_SEARCH, FTL_SEARCH_DATA.
@roadmap_1325_li
@roadmap_1324_li
Sequences: CURRVAL should be session specific. Compatibility with PostgreSQL.
@roadmap_1326_li
@roadmap_1325_li
Support DatabaseMetaData.insertsAreDetected: updatable result sets should detect inserts.
@roadmap_1327_li
@roadmap_1326_li
Auto-server: add option to define the IP address range or list.
@roadmap_1328_li
@roadmap_1327_li
Index creation only using deterministic functions.
@roadmap_1329_li
@roadmap_1328_li
Use http://recaptcha.net somehow to secure the Google Group.
@roadmap_1330_li
@roadmap_1329_li
Support DELETE with TOP or LIMIT. See also: http://dev.mysql.com/doc/refman/5.1/de/delete.html
@roadmap_1331_li
@roadmap_1330_li
Change the default for NULL || 'x' to return NULL
@roadmap_1332_li
@roadmap_1331_li
ANALYZE: Use a bloom filter for each indexed column to estimate count of distinct values.
@roadmap_1333_li
@roadmap_1332_li
ANALYZE: For unique indexes that allow null, count the number of null.
@roadmap_1334_li
@roadmap_1333_li
AUTO_SERVER: support changing IP addresses (disable a network while the database is open).
@roadmap_1335_li
@roadmap_1334_li
Avoid using java.util.Calendar internally because it's slow, complicated, and seems to be buggy.
@roadmap_1336_li
@roadmap_1335_li
Support TRUNCATE .. CASCADE like PostgreSQL.
@roadmap_1337_li
@roadmap_1336_li
Support opening a database that is in the classpath, maybe using a new file system.
@roadmap_1338_li
@roadmap_1337_li
Fulltext search: lazy result generation using SimpleRowSource.
@roadmap_1339_li
@roadmap_1338_li
Support transformation to join for user defined functions, as for IN(SELECT...).
@roadmap_1340_li
@roadmap_1339_li
Fulltext search: Support alternative syntax: WHERE FTL_CONTAINS(name, 'hello').
@roadmap_1341_li
@roadmap_1340_li
MySQL compatibility: support REPLACE, see http://dev.mysql.com/doc/refman/5.1/de/replace.html
@roadmap_1342_li
@roadmap_1341_li
MySQL compatibility: support INSERT INTO table SET column1 = value1, column2 = value2
@roadmap_1343_li
@roadmap_1342_li
Docs: Add a one line description for each functions and SQL statements at the top (in the link section).
@roadmap_1344_li
@roadmap_1343_li
Javadoc search: weight for titles should be higher ('random' should list Functions as the best match).
@roadmap_1345_li
@roadmap_1344_li
Replace information_schema tables with regular tables that are automatically re-built when needed. Use indexes.
@roadmap_1346_li
@roadmap_1345_li
Support a special trigger on all tables.
@roadmap_1347_li
@roadmap_1346_li
Delete temporary files or objects using finalize.
@roadmap_1348_li
@roadmap_1347_li
Oracle compatibility: support calling 0-parameters functions without parenthesis. Make constants obsolete.
@roadmap_1349_li
@roadmap_1348_li
MySQL, HSQLDB compatibility: support where 'a'=1 (not supported by Derby, PostgreSQL)
@roadmap_1350_li
@roadmap_1349_li
Allow calling function with no parameters without parenthesis. See http://code.google.com/p/h2database/issues/detail?id=50
@roadmap_1351_li
@roadmap_1350_li
CSV: currently # is a line comment and can start at any field. Make it optional.
@roadmap_1352_li
@roadmap_1351_li
Add database creation date and time to the database.
@roadmap_1353_li
@roadmap_1352_li
Support ASSERTIONS.
@roadmap_1354_li
@roadmap_1353_li
MySQL compatibility: support comparing 1='a'
@roadmap_1355_li
@roadmap_1354_li
Support PostgreSQL lock modes: http://www.postgresql.org/docs/8.3/static/explicit-locking.html
@roadmap_1356_li
@roadmap_1355_li
PostgreSQL compatibility: test DbVisualizer and Squirrel SQL using a new PostgreSQL JDBC driver.
@roadmap_1357_li
@roadmap_1356_li
RunScript should be able to read from system in (or quite mode for Shell).
@roadmap_1358_li
@roadmap_1357_li
Natural join: support select x from dual natural join dual.
@roadmap_1359_li
@roadmap_1358_li
Natural join: somehow support this: select a.x, b.x, x from dual a natural join dual b
@roadmap_1360_li
@roadmap_1359_li
MySQL compatibility: for auto_increment columns, convert 0 to next value (as when inserting NULL).
@roadmap_1361_li
@roadmap_1360_li
Functions: support hashcode(value); cryptographic and fast
@roadmap_1362_li
@roadmap_1361_li
Serialized file lock: support long running queries.
@roadmap_1363_li
@roadmap_1362_li
Network: use 127.0.0.1 if other addresses don't work.
@roadmap_1364_li
@roadmap_1363_li
Select for update in mvcc mode: only lock the selected records.
@roadmap_1365_li
@roadmap_1364_li
Support reading JCR data: one table per node type; query table; cache option
@roadmap_1366_li
@roadmap_1365_li
OSGi: create a sample application, test, document.
@roadmap_1367_li
@roadmap_1366_li
help.csv: use complete examples for functions; run as test case.
@roadmap_1368_li
@roadmap_1367_li
Re-implement PooledConnection; use a lightweight connection object.
@roadmap_1369_li
@roadmap_1368_li
Doclet: convert tests in javadocs to a java class.
@roadmap_1370_li
@roadmap_1369_li
Doclet: format fields like methods, but support sorting by name and value.
@roadmap_1371_li
@roadmap_1370_li
Doclet: shrink the html files.
@roadmap_1372_li
@roadmap_1371_li
Finer granularity for SLF4J trace - See http://code.google.com/p/h2database/issues/detail?id=62
@roadmap_1373_li
@roadmap_1372_li
MySQL compatibility: support REPLACE - See http://code.google.com/p/h2database/issues/detail?id=73
@roadmap_1374_li
@roadmap_1373_li
MySQL compatibility: support SET NAMES 'latin1' - See also http://code.google.com/p/h2database/issues/detail?id=56
@roadmap_1375_li
@roadmap_1374_li
MySQL compatibility: DELETE .. FROM .. USING - See http://dev.mysql.com/doc/refman/5.0/en/delete.html
@roadmap_1376_li
@roadmap_1375_li
Allow to scan index backwards starting with a value (to better support ORDER BY DESC).
@roadmap_1377_li
@roadmap_1376_li
Java Service Wrapper: try http://yajsw.sourceforge.net/
@roadmap_1378_li
@roadmap_1377_li
Batch parameter for INSERT, UPDATE, and DELETE, and commit after each batch. See also MySQL DELETE.
@roadmap_1379_li
@roadmap_1378_li
MySQL compatibility: support ALTER TABLE .. MODIFY COLUMN.
@roadmap_1380_li
@roadmap_1379_li
Use a lazy and auto-close input stream (open resource when reading, close on eof).
#Connection pool: the default login timeout is now 5 minutes.
@changelog_1005_li
@changelog_1007_li
#After truncating tables, opening large databases could become slow because indexes were always re-built unnecessarily when opening.
@changelog_1006_li
@changelog_1008_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_1007_li
@changelog_1009_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_1008_li
@changelog_1010_li
#Improved error message when the .lock.db file modification time is in the future.
@changelog_1009_li
@changelog_1011_li
#The MERGE statement now returns 0 as the generated key if the row was updated.
@changelog_1010_li
@changelog_1012_li
#Running code coverage is now automated.
@changelog_1011_li
#A file system implementation can now be registered using FileSystem.register. The database file system is no longer included in the jar file, it moved to the test section.
@changelog_1013_li
#A file system implementation can now be registered using FileSystem.register.
@changelog_1014_li
#The database file system is no longer included in the jar file, it moved to the test section.
@changelog_1012_h2
@changelog_1015_h2
#Version 1.1.111 (2009-04-10)
@changelog_1013_li
@changelog_1016_li
#In-memory databases can now run inside the Google App Engine.
@changelog_1014_li
@changelog_1017_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_1015_li
@changelog_1018_li
#The wrong exception was thrown when using unquoted text for the SQL statements COMMENT, ALTER USER, and SET PASSWORD.
@changelog_1016_li
@changelog_1019_li
#The built-in connection pool did not roll back transactions and enable autocommit enabled after closing a connection.
@changelog_1017_li
@changelog_1020_li
#Sometimes a StackOverflow occurred when checking for deadlock. See also http://code.google.com/p/h2database/issues/detail?id=61
@changelog_1018_li
@changelog_1021_li
#The Shell tool no longer truncates results with only one column, and displays a message if data was truncated.
@changelog_1019_h2
@changelog_1022_h2
#Version 1.1.110 (2009-04-03)
@changelog_1020_li
@changelog_1023_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_1021_li
@changelog_1024_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_1022_li
@changelog_1025_li
#The data type of a SUBSTRING method was wrong.
@changelog_1023_li
@changelog_1026_li
#ResultSet.findColumn and get methods with column label parameters now also check for matching column names (like most databases except MySQL).
@changelog_1024_li
@changelog_1027_li
#H2 Console: the browser system property now supports a list of arguments. Example: java -Dh2.browser="open,-a,Safari,%url" ...
@changelog_1025_li
@changelog_1028_li
#Improved Javadoc navigation (similar to Scaladoc).
@changelog_1026_li
@changelog_1029_li
#H2 Console: auto-complete of identifiers did not work correctly for H2 databases in MySQL mode.
@changelog_1027_li
@changelog_1030_li
#DISTINCT and GROUP BY on a CLOB column was broken.
@changelog_1028_li
@changelog_1031_li
#The FTP server moved to the tools section and is no longer included in the h2*.jar file.
@changelog_1029_li
@changelog_1032_li
#Improved error message for unsupported features: now the message says what exactly is not supported.
@changelog_1030_li
@changelog_1033_li
#Improved OSGi support.
@changelog_1031_li
@changelog_1034_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_1032_li
@changelog_1035_li
#The API of the tools changed a bit (each tool now returns an exit code).
@changelog_1033_li
@changelog_1036_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_1034_li
@changelog_1037_li
#CREATE TABLE: improved compatibility (support for UNIQUE NOT NULL).
@changelog_1035_li
@changelog_1038_li
#DatabaseMetaData.getSQLKeywords now returns the correct list.
@changelog_1036_li
@changelog_1039_li
#Deterministic user defined functions did not work when the parameter was a column. Fixed.
@changelog_1037_li
@changelog_1040_li
#JdbcConnectionPool.setLoginTimeout with 0 now uses the default timeout.
@changelog_1038_li
@changelog_1041_li
#Creating a JdbcConnectionPool has been simplified a bit.
@changelog_1039_li
@changelog_1042_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_1040_li
@changelog_1043_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_1041_li
@changelog_1044_li
#Linked tables to SQLite database can now be created.
@changelog_1042_li
@changelog_1045_li
#Nested IN(IN(...)) didn't work.
@changelog_1043_li
@changelog_1046_li
#NIO storage: the nio: prefix was using memory mapped files instead of FileChannel.
@changelog_1044_h2
@changelog_1047_h2
#Version 1.1.109 (2009-03-14)
@changelog_1045_li
@changelog_1048_li
#The optimization for IN(...) is now only used if comparing a column with an index.
@changelog_1046_li
@changelog_1049_li
#User defined functions can now be deterministic (see CREATE ALIAS documentation).
@changelog_1047_li
@changelog_1050_li
#Multiple nested queries in the FROM clause with parameters did not always work.
@changelog_1048_li
@changelog_1051_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_1049_li
@changelog_1052_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_1050_li
@changelog_1053_li
#The functions BITOR, BITAND, BITXOR, and MOD now accept and return BIGINT instead of INT.
@changelog_1051_li
@changelog_1054_li
#Could not use the same linked table multiple times in the same query.
@changelog_1052_li
@changelog_1055_li
#Bugs in the server-less multi-connection mode have been fixed.
@changelog_1053_li
@changelog_1056_li
#Column names could not be named "UNIQUE" (with the quotes).
@changelog_1054_li
@changelog_1057_li
#New system function TRANSACTION_ID() to get the current transaction identifier for a session.
@changelog_1055_h2
@changelog_1058_h2
#Version 1.1.108 (2009-02-28)
@changelog_1056_li
@changelog_1059_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_1057_li
@changelog_1060_li
#JdbcConnectionPool: it was possible to set a negative connection pool size.
@changelog_1058_li
@changelog_1061_li
#Fulltext search did not support table names with a backslash.
@changelog_1059_li
@changelog_1062_li
#The internal IntArray class did not work correctly when initialized with a zero length array.
@changelog_1060_li
@changelog_1063_li
#The H2 Console web application (war file) did only support ASCII characters. Now UTF-8 is supported.
@changelog_1061_li
@changelog_1064_li
#DATEADD does no longer require that the argument is a timestamp.
@changelog_1062_li
@changelog_1065_li
#The database file locking mechanism didn't work correctly on Mac OS.
@changelog_1063_li
@changelog_1066_li
#Some built-in functions reported the wrong precision, scale, and display size.
@changelog_1064_li
@changelog_1067_li
#MySQL compatibility for CREATE TABLE is improved (UNSIGNED, KEY).
@changelog_1065_li
@changelog_1068_li
#Recovery did not work if there were more than 255 lobs stored as files.
@changelog_1066_li
@changelog_1069_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_1067_li
@changelog_1070_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_1068_li
@changelog_1071_li
#The WebServlet did not close the database when un-deploying the web application.
@changelog_1069_li
@changelog_1072_li
#The exception message of failed INSERT or MERGE statements now includes all values and the row number.
@changelog_1070_li
@changelog_1073_li
#If opening a database failed with an out of memory exception, some files were not closed.
@changelog_1071_li
@changelog_1074_li
#Optimizer: the expected runtime calculation was incorrect. The fixed calculation should give slightly better query plans when using many joins.
@changelog_1072_li
@changelog_1075_li
#Improved exception message when connecting to a just started server fails.
@changelog_1073_li
@changelog_1076_li
#Connection.isValid is a bit faster.
@changelog_1074_li
@changelog_1077_li
#H2 Console: The autocomplete feature has been improved a bit. It can now better parse conditions.
@changelog_1075_li
@changelog_1078_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_1076_h2
@changelog_1079_h2
#Version 1.1.107 (2009-01-24)
@changelog_1077_li
@changelog_1080_li
#Some DatabaseMetaData operations did not work for non-admin users for versions 1.1.x.
@changelog_1078_li
@changelog_1081_li
#The MySQL compatibility extension fromUnixTime now used the English locale.
@changelog_1079_li
@changelog_1082_li
#When using LOG=2 and repeatedly updating the last row rows of a table, the index file grew quickly.
@changelog_1080_li
@changelog_1083_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_1081_li
@changelog_1084_li
#Enabling the trace mechanism by creating a specially named file is no longer supported.
@changelog_1082_h2
@changelog_1085_h2
#Version 1.1.106 (2009-01-04)
@changelog_1083_li
@changelog_1086_li
#Statement.setQueryTimeout did not work correctly for some statements.
@changelog_1084_li
@changelog_1087_li
#CREATE DOMAIN: Built-in data types can now only be changed if no tables exist.
@changelog_1085_li
@changelog_1088_li
#Linked tables: a workaround for Oracle DATE columns has been implemented.
@changelog_1086_li
@changelog_1089_li
#DatabaseMetaData.getPrimaryKeys: The column PK_NAME now contains the constraint name instead of the index name (compatibility for PostgreSQL and Derby).
@changelog_1087_li
@changelog_1090_li
#Using IN(..) inside a IN(SELECT..) did not always work.
@changelog_1088_li
@changelog_1091_li
#Views with IN(..) that used a view itself did not work.
@changelog_1089_li
@changelog_1092_li
#Union queries with LIMIT or ORDER BY that are used in a view or subquery did not work.
@changelog_1090_li
@changelog_1093_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_1091_li
@changelog_1094_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_1092_li
@changelog_1095_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_1093_h2
@changelog_1096_h2
#Version 1.1.105 (2008-12-19)
@changelog_1094_li
@changelog_1097_li
#The setting STORAGE=TEXT is no longer supported.
@changelog_1095_li
@changelog_1098_li
#Deleting a database using the tool DeleteDbFiles deleted LOB files of other databases in the same directory.
@changelog_1096_li
@changelog_1099_li
#When used in a subquery, LIKE and IN(..) did not work correctly sometimes.
@changelog_1097_li
@changelog_1100_li
#The fulltext search documentation has been improved.
@changelog_1098_li
@changelog_1101_li
#ARRAY_GET returned the wrong data type (ARRAY). Now it returns VARCHAR.
@changelog_1099_li
@changelog_1102_li
#Natural join: the joined columns are not repeated any more when using SELECT *.
@changelog_1100_li
@changelog_1103_li
#User defined aggregate functions: the method getType expected internal data types instead of SQL types.
@changelog_1101_li
@changelog_1104_li
#User defined aggregate functions did not work if there was no group by expression.
@changelog_1102_li
@changelog_1105_li
#MySQL compatibility: support for := assignment as in @sum:=@sum+x
@changelog_1103_li
@changelog_1106_li
#INSERT INTO TEST(SELECT * FROM TEST) is now supported.
@changelog_1104_li
@changelog_1107_li
#Each session threw an invisible exception when garbage collected.
@changelog_1105_li
@changelog_1108_li
#Foreign key constraints that refer to a quoted column did not work.
@changelog_1106_li
@changelog_1109_li
#New meta data column INFORMATION_SCHEMA.TABLES.LAST_MODIFICATION to get the table modification counter.
@changelog_1107_li
@changelog_1110_li
#Shell: line comments didn't work correctly.
@changelog_1108_li
@changelog_1111_li
#H2 Console: Columns are now listed for up to 500 tables instead of 100.
@changelog_1109_li
@changelog_1112_li
#H2 Console: Cmd+Enter executes the current statement, Alt+Space for autocomplete.
@changelog_1110_li
@changelog_1113_li
#JaQu: the maximum length of a column can now be defined using maxLength. For an example, see Product.java (maxLength(category, 255)).
@changelog_1111_li
@changelog_1114_li
#R&\#305;dvan A&\#287;ar has completed the Turkish translation of the H2 Console. Thanks a lot!
@changelog_1112_h2
@changelog_1115_h2
#Version 1.1.104 (2008-11-28)
@changelog_1113_li
@changelog_1116_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_1114_li
@changelog_1117_li
#JaQu: tables are now auto-created when running a query.
@changelog_1115_li
@changelog_1118_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_1116_li
@changelog_1119_li
#The function SUM could overflow when using large values. It returns now a data type that is safe.
@changelog_1117_li
@changelog_1120_li
#The function AVG could overflow when using large values. Fixed.
@changelog_1118_li
@changelog_1121_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_1119_li
@changelog_1122_li
#Build: JAVA_HOME is now automatically detected on Mac OS X.
@changelog_1120_li
@changelog_1123_li
#Testing for local connections was very slow on some systems.
@changelog_1121_li
@changelog_1124_li
#The cache memory usage calculation is more conservative.
@changelog_1122_li
@changelog_1125_li
#Allocating space got slower and slower the larger the database.
@changelog_1123_li
@changelog_1126_li
#ALTER TABLE ALTER COLUMN could throw the wrong exception in the last version (Table not found).
@changelog_1124_li
@changelog_1127_li
#Updatable result sets: the key columns can now be updated.
@changelog_1125_li
@changelog_1128_li
#The H2DatabaseProvider for ActiveObjects is now included in the tools section.
@changelog_1126_li
@changelog_1129_li
#The H2Platform for Oracle Toplink Essential has been improved a bit.
@changelog_1127_li
@changelog_1130_li
#The Windows service to start H2 didn't work in version 1.1.
@changelog_1128_li
@changelog_1131_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_1129_li
@changelog_1132_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_1130_li
@changelog_1133_li
#Compatibility for MS SQL Server DATEDIFF(YYYY, .., ..)
@changelog_1131_li
@changelog_1134_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_1132_li
@changelog_1135_li
#The interface CloseListener has a new method 'remove' that is called when the trigger is dropped.
@changelog_1133_li
@changelog_1136_li
#Fulltext search: there was a memory leak when creating and dropping fulltext indexes in a loop.
@changelog_1134_h2
@changelog_1137_h2
#Version 1.1.103 (2008-11-07)
@changelog_1135_li
@changelog_1138_li
#Could not order by a formula when the formula was in the group by list but not in the select list.
@changelog_1136_li
@changelog_1139_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_1137_li
@changelog_1140_li
#ALTER TABLE used a lot of memory when using multi-version concurrency.
@changelog_1138_li
@changelog_1141_li
#Referential integrity for in-memory databases didn't work in some cases in version 1.1.102.
@changelog_1139_li
@changelog_1142_li
#New column INFORMATION_SCHEMA.COLUMNS.SEQUENCE_NAME to get the name of the sequence for auto-increment columns.
@changelog_1140_li
@changelog_1143_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_1141_li
@changelog_1144_li
#The Japanese translation has been completed by Masahiro Ikemoto. Thanks a lot!
@changelog_1142_li
@changelog_1145_li
#Improved PostgreSQL compatibility for NEXTVAL and CURRVAL.
@changelog_1143_li
@changelog_1146_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_1144_li
@changelog_1147_li
#New system property h2.browser to set the browser to use.
@changelog_1145_li
@changelog_1148_li
#To start the browser, java.awt.Desktop.browse is now used if available.
@changelog_1146_h2
@changelog_1149_h2
#Version 1.1.102 (2008-10-24)
@changelog_1147_li
@changelog_1150_li
#The French translation of the H2 Console has been improved by Olivier Parent. Thanks a lot!
@changelog_1148_li
@changelog_1151_li
#There was a memory leak when creating and dropping tables and indexes in a loop (persistent database only).
@changelog_1149_li
@changelog_1152_li
#SET LOG 2 was not effective if executed after opening the database.
@changelog_1150_li
@changelog_1153_li
#Translating the H2 Console is now simpler.
@changelog_1151_li
@changelog_1154_li
#Common exception (error code 23*) are no longer written to the .trace.db file by default.
@changelog_1152_li
@changelog_1155_li
#In-memory databases don't write LOBs to files any longer.
@changelog_1153_li
@changelog_1156_li
#Self referencing constraints didn't restrict deleting rows that reference itself if there is another row that references it.
@changelog_1154_li
@changelog_1157_li
#ResultSetMetaData.getColumnName now returns the alias name except for columns.
@changelog_1155_li
@changelog_1158_li
#Temporary files are now deleted when the database is closed, even if they were not garbage collected so far.
@changelog_1156_h2
@changelog_1159_h2
#Version 1.1.101 (2008-10-17)
@changelog_1157_li
@changelog_1160_li
#Errors with code 42000 - 42999 are no longer written to the trace file by default.
@changelog_1158_li
@changelog_1161_li
#Queries with more than 10 tables are now faster.
@changelog_1159_li
@changelog_1162_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_1160_li
@changelog_1163_li
#IF [NOT] EXISTS is supported for named constraints in ALTER TABLE ... ADD/DROP CONSTRAINT.
@changelog_1161_li
@changelog_1164_li
#The error messages have been translated to Spanish by Dario V. Fassi. Thanks a lot!
@changelog_1162_li
@changelog_1165_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_1163_li
@changelog_1166_li
#Opening large database is now faster.
@changelog_1164_li
@changelog_1167_li
#New system property h2.socketConnectTimeout, the timeout in milliseconds to connect to a server. The default is 2000 (2 seconds).
@changelog_1165_li
@changelog_1168_li
#The wrong parameters were bound to subqueries with parameters, specially when using IN(SELECT ...) and IN(...).
@changelog_1166_li
@changelog_1169_li
#Unset parameters were not detected when the query was re-compiled.
@changelog_1167_li
@changelog_1170_li
#New functions ISO_YEAR, ISO_WEEK, ISO_DAY_OF_WEEK. Thanks a lot to Robert Rathsack for implementing those!
@changelog_1168_li
@changelog_1171_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_1169_li
@changelog_1172_li
#An out of memory error while deleting or updating many rows could result in a strange exception.
@changelog_1170_li
@changelog_1173_li
#Linked tables: compatibility with MS SQL Server has been improved.
@changelog_1171_li
@changelog_1174_li
#Renaming tables that have foreign keys with cascade didn't work correctly.
@changelog_1172_li
@changelog_1175_li
#The auto-reconnect feature didn't work when using the auto-server mode. Fixed.
@changelog_1173_li
@changelog_1176_li
#Fulltext search: new method FT_DROP_INDEX.
@changelog_1174_li
@changelog_1177_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_1175_li
@changelog_1178_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_1176_li
@changelog_1179_li
#The default value for MAX_MEMORY_UNDO is now 50000.
@changelog_1177_li
@changelog_1180_li
#For alias columns, ResultSetMetaData.getTableName() and getColumnName() now return the real table and column name in the default mode.
@changelog_1178_li
@changelog_1181_li
#In SQL scripts created with SCRIPT TO, schemas are now only created if they don't exist yet.
@changelog_1179_li
@changelog_1182_li
#After re-connecting to a database, the database event listener (if set) is informed about it.
@changelog_1180_li
@changelog_1183_li
#Local temporary tables now support indexes. Thanks a lot to Matt Roy!
@changelog_1181_li
@changelog_1184_li
#RUNSCRIPT no longer uses a temporary file.
@changelog_1182_li
@changelog_1185_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_1183_li
@changelog_1186_li
#After an automatic re-connect, part of the session state stays (the part that is stored in the SESSION_STATE table).
@changelog_1184_li
@changelog_1187_li
#The build didn't work if the directory temp didn't exist before.
@changelog_1185_li
@changelog_1188_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_1186_li
@changelog_1189_li
#WHERE .. IN (SELECT ...) could throw a NullPointerException.
@changelog_1187_li
@changelog_1190_li
#Improved Glassfish / Toplink support in H2Platform thanks to Marcio Borges from Brazil. Thanks a lot!
@changelog_1188_h2
@changelog_1191_h2
#Version 1.1.100 (2008-10-04)
@changelog_1189_li
@changelog_1192_li
#In version 1.1, the following system properties are now enabled by default: h2.lobFilesInDirectories, h2.optimizeGroupSorted, h2.optimizeInJoin, h2.shareLinkedConnections
@changelog_1190_li
@changelog_1193_li
#The H2 Console tool now works with the JDBC-ODBC bridge.
@changelog_1191_li
@changelog_1194_li
#The H2 Console tool now supports command line options to start things separately.
@changelog_1192_li
@changelog_1195_li
#Large objects did not work for in-memory databases in server mode in Linux.
@changelog_1193_li
@changelog_1196_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_1194_li
@changelog_1197_li
#The h2console.war can now be built using the Java build.
@changelog_1195_li
@changelog_1198_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_1196_li
@changelog_1199_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_1197_li
@changelog_1200_li
#CreateCluster: the property 'serverlist' is now called 'serverList'.
@changelog_1198_li
@changelog_1201_li
#The ConvertTraceFile tool could not parse some files because the trace mechanism did not encode prepared statement parameters.
@changelog_1199_li
@changelog_1202_li
#Databases names can now be one character long (the minimum size used to be 2 characters).
@changelog_1200_h2
@changelog_1203_h2
#Version 1.0.79 (2008-09-26)
@changelog_1201_li
@changelog_1204_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_1202_li
@changelog_1205_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_1203_li
@changelog_1206_li
#The server tool now displays the correct IP address if networked.
@changelog_1204_li
@changelog_1207_li
#Can now start a TCP server with port 0 (automatically select a port).
@changelog_1205_li
@changelog_1208_li
#Result sets with just a unique index can now be updated (previously a primary key was required).
@changelog_1206_li
@changelog_1209_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_1207_li
@changelog_1210_li
#LINKED TABLE: worked around a bug in Oracle with the CHAR data type.
@changelog_1208_li
@changelog_1211_li
#Faster hash code calculation for large binary arrays.
@changelog_1209_li
@changelog_1212_li
#Faster storage re-use algorithm thanks to Greg Dhuse from cleversafe.com.
@changelog_1210_li
@changelog_1213_li
#The database supports the SHOW command for better MySQL and PostgreSQL compatibility.
@changelog_1211_li
@changelog_1214_li
#The H2 Console now abbreviates large texts in results.
@changelog_1212_li
@changelog_1215_li
#Multiple UNION queries could not be used in derived tables.
@changelog_1213_li
@changelog_1216_li
#Linked tables can now be read-only.
@changelog_1214_li
@changelog_1217_li
#Temporary linked tables are now supported.
@changelog_1215_li
@changelog_1218_li
#It was possible to create tables in read-only databases.
@changelog_1216_li
@changelog_1219_li
#SET SCHEMA_SEARCH_PATH is now documented.
@changelog_1217_li
@changelog_1220_li
#SET SCHEMA did not work for views.
@changelog_1218_li
@changelog_1221_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_1219_li
@changelog_1222_li
#The maximum log file size setting was ignored for large databases.
@changelog_1220_li
@changelog_1223_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_1221_li
@changelog_1224_li
#The data type JAVA_OBJECT could not be used in updatable result sets.
@changelog_1222_li
@changelog_1225_li
#The system property h2.optimizeInJoin did not work correctly.
@changelog_1223_li
@changelog_1226_li
#Conditions such as ID=? AND ID>? were slow.
@changelog_1224_h2
@changelog_1227_h2
#Version 1.0.78 (2008-08-28)
@changelog_1225_li
@changelog_1228_li
#The documentation no longer uses a frameset (except the Javadocs).
@changelog_1226_li
@changelog_1229_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_1227_li
@changelog_1230_li
#Java methods with variable number of parameters can now be used (for Java 1.5 or newer).
@changelog_1228_li
@changelog_1231_li
#The Japanese translation has been improved by Masahiro Ikemoto. Thanks a lot!
@changelog_1229_li
@changelog_1232_li
#The H2 Console replaced an empty user name with a single space.
@changelog_1230_li
@changelog_1233_li
#The build target 'build jarSmall' now includes the embedded database.
@changelog_1231_li
@changelog_1234_li
#JdbcDataSource now keeps the password in a char array where possible.
@changelog_1232_li
@changelog_1235_li
#ResultSet.absolute did not always work with large result sets.
@changelog_1233_li
@changelog_1236_li
#Column aliases can now be used in GROUP BY and HAVING.
@changelog_1234_li
@changelog_1237_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_1235_h2
@changelog_1238_h2
#Version 1.0.77 (2008-08-16)
@changelog_1236_li
@changelog_1239_li
#JaQu is now using prepared statements and supports Date, Time, Timestamp.
@changelog_1237_li
@changelog_1240_li
#When using remote in-memory databases, large LOB objects did not work.
@changelog_1238_li
@changelog_1241_li
#Timestamp columns such as TIMESTAMP(6) were not compatible to other database.
@changelog_1239_li
@changelog_1242_li
#Opening a large database was slow if there was a problem opening the previous time.
@changelog_1240_li
@changelog_1243_li
#NOT IN(SELECT ...) was incorrect if the subquery returns no rows.
@changelog_1241_li
@changelog_1244_li
#CREATE TABLE AS SELECT did not work correctly in the multi-version concurrency mode.
@changelog_1242_li
@changelog_1245_li
#Support a comma before closing a list, as in: create table test(id int,)
@changelog_1243_li
@changelog_1246_li
#MySQL compatibility: linked tables had lower case column names on some systems.
@changelog_1244_li
@changelog_1247_li
#DB2 compatibility: the DB2 fetch-first-clause is supported.
@changelog_1245_li
@changelog_1248_li
#Oracle compatibility: old style outer join syntax using (+) did work correctly sometimes.
@changelog_1246_li
@changelog_1249_li
#ResultSet.setFetchSize is now supported.
@changelog_1247_li
@changelog_1250_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_1248_h2
@changelog_1251_h2
#Version 1.0.76 (2008-07-27)
@changelog_1249_li
@changelog_1252_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_1250_li
@changelog_1253_li
#Invalid database names are now detected and a better error message is thrown.
@changelog_1251_li
@changelog_1254_li
#ResultSetMetaData.getColumnClassName now returns the correct class name for BLOB and CLOB.
@changelog_1252_li
@changelog_1255_li
#Fixed the Oracle mode: Oracle allows multiple rows only where all columns of the unique index are NULL.
@changelog_1253_li
@changelog_1256_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_1254_li
@changelog_1257_li
#ORDER BY on tableName.columnName didn't work correctly if the column name was also used as an alias.
@changelog_1255_li
@changelog_1258_li
#H2 Console: The progress display when opening a database has been improved.
@changelog_1256_li
@changelog_1259_li
#The error message when the server doesn't start has been improved.
@changelog_1257_li
@changelog_1260_li
#Key values can now be changed in updatable result sets.
@changelog_1258_li
@changelog_1261_li
#Changes in updatable result sets are now visible even when resetting the result set.
@changelog_1259_li
@changelog_1262_li
#Temporary files were sometimes deleted too late when executing large insert, update, or delete operations.
@changelog_1260_li
@changelog_1263_li
#The database file was growing after deleting many rows, and after large update operations.
@changelog_1261_h2
@changelog_1264_h2
#Version 1.0.75 (2008-07-14)
@changelog_1262_li
@changelog_1265_li
#Multi version concurrency (MVCC): when a row was updated or deleted, but this change was rolled back, the row was not visible by other sessions if no index was used to access it. Fixed.
@changelog_1263_li
@changelog_1266_li
#Views with multiple joined tables (where one was an outer join) couldn't be used in some cases. Fixed.
@changelog_1264_li
@changelog_1267_li
#The CSVREAD method did not process NULL correctly when using a whitespace field separator.
@changelog_1265_li
@changelog_1268_li
#Fixed the Oracle mode: Oracle allows multiple rows with NULL in a unique index.
@changelog_1266_li
@changelog_1269_li
#Running out of memory could result in incomplete transactions or corrupted databases. Fixed.
@changelog_1267_li
@changelog_1270_li
#When using order by in a query that uses the same table multiple times, the order could be incorrect. Fixed.
@changelog_1268_li
@changelog_1271_li
#Referential constraint checking improvement: now the constraint is only checked if the key column values change.
@changelog_1269_li
@changelog_1272_li
#Some database metadata calls returned the wrong data type for DATA_TYPE columns.
@changelog_1270_li
@changelog_1273_li
#The Lucene fulltext index was empty when opening a database with fulltext index enabled, and re-indexing it didn't work. Fixed.
@changelog_1271_li
@changelog_1274_li
#The character '$' could not be used in identifier names (table name, column names and so on). Fixed.
@changelog_1272_li
@changelog_1275_li
#The new method org.h2.tools.Server.startWebServer(conn) starts the H2 Console to inspect a database while debugging.
@changelog_1273_li
@changelog_1276_li
#Stopping a WebServer didn't always work. Fixed.
@changelog_1274_h2
@changelog_1277_h2
#Version 1.0.74 (2008-06-21)
@changelog_1275_li
@changelog_1278_li
#Work on row level locking has been started (but there is nothing usable yet).
@changelog_1276_li
@changelog_1279_li
#JaQu (Java Query), a tool similar to LINQ (Language Integrated Query; from Microsoft) is now included under src/tools/org/h2/jaqu. A small sample application is included under src/test/org/h2/test/jaqu.
@changelog_1277_li
@changelog_1280_li
#The source code is now switched to Java 1.6 by default. To switch back to Java 1.4, run 'build compile'. The h2.jar file is still Java 1.4.
@changelog_1278_li
@changelog_1281_li
#The ChangePassword tool is now called ChangeFileEncryption.
@changelog_1279_li
@changelog_1282_li
#It is no longer allowed to create columns with the data type NULL. Also, it is no longer allowed to convert a column to the data type NULL. This was possible before but caused data loss.
@changelog_1280_li
@changelog_1283_li
#When using computed columns or default values with a different data type than the column data type, a class cast exception could occur. Fixed.
@changelog_1281_li
@changelog_1284_li
#Opening databases larger than 1 GB was sometimes very slow if a lot of data was deleted previously. Fixed.
@changelog_1282_li
@changelog_1285_li
#RUNSCRIPT could throw a NullPointerException if the script name was an expression.
@changelog_1283_li
@changelog_1286_li
#Improved compatibility. New compatibility modes for Oracle and Derby. New compatibility flag uniqueIndexNullDistinct to only allow one row with 'NULL' in a unique index. This flag is enabled for Derby, Oracle, MSSQLServer, and HSQLDB.
@changelog_1284_li
@changelog_1287_li
#Linked tables: To view the statements that are executed against the target table, set the trace level to 3.
@changelog_1285_li
@changelog_1288_li
#RunScript tool: new options to show and check the results of queries.
@changelog_1286_li
@changelog_1289_li
#Deadlocks are now detected. One transaction is rolled back automatically.
@changelog_1287_li
@changelog_1290_li
#The Lucene fulltext index was always re-created when opening a database with fulltext index enabled.
@changelog_1288_li
@changelog_1291_li
#Support for overloaded Java methods. A user defined function can now be bound to multiple Java methods, if the Java methods have the same name but a different number of parameters. Thanks to Gary Tong for providing a patch!
@changelog_1289_h2
@changelog_1292_h2
#Version 1.0.73 (2008-05-31)
@changelog_1290_li
@changelog_1293_li
#ParameterMetaData now returns the right data type for most conditions, as in WHERE ID=?.
@changelog_1291_li
@changelog_1294_li
#The table SYSTEM_RANGE now supports expressions and parameters.
@changelog_1292_li
@changelog_1295_li
#New column INFORMATION_SCHEMA.CONSTRAINTS.UNIQUE_INDEX_NAME that contains the name of the unique index used to enforce this constraint, if there is such an index.
@changelog_1293_li
@changelog_1296_li
#SET QUERY_TIMEOUT and Statement.setQueryTimeout no longer commits a transaction. The same applies to SET @VARIABLE, SET LOCK_TIMEOUT, SET TRACE_LEVEL_*, SET THROTTLE, and SET PATH.
@changelog_1294_li
@changelog_1297_li
#The SCRIPT command does now emit IF NOT EXISTS for CREATE ROLE.
@changelog_1295_li
@changelog_1298_li
#MySQL compatibility: auto_increment column are no longer automatically converted to primary key columns.
@changelog_1296_li
@changelog_1299_li
#PostgreSQL compatibility: support for BOOL_OR and BOOL_AND aggregate functions.
@changelog_1297_li
@changelog_1300_li
#Negative scale values for DECIMAL or NUMBER columns are now supported in regular tables and in linked tables.
@changelog_1298_li
@changelog_1301_li
#A role or right can now be granted or revoked multiple times without getting an exception.
@changelog_1299_li
@changelog_1302_li
#Infinite numbers in SQL scripts are listed as POWER(0, -1)), negative infinite as (-POWER(0, -1)), and NaN (not a number) as SQRT(-1).
@changelog_1300_li
@changelog_1303_li
#The special double and float values 'NaN' (not a number) did not work correctly when sorting or comparing.
@changelog_1301_li
@changelog_1304_li
#The fulltext search did not support CLOB data types.
@changelog_1302_li
@changelog_1305_li
#If the drive with the database files was disconnected or unmounted while writing, sometimes a stack overflow exception was thrown instead of a IO exception.
@changelog_1303_li
@changelog_1306_li
#The H2 Console could not be shut down from within the tool if the browser supports keepAlive (most browsers do).
@changelog_1304_li
@changelog_1307_li
#If the password was passed as a char array, it was kept in an internal buffer longer than required. Theoretically the password could have been stolen if the main memory was swapped to disk before the garbage collection was run.
@changelog_1305_h2
@changelog_1308_h2
#Version 1.0.72 (2008-05-10)
@changelog_1306_li
@changelog_1309_li
#Some databases could not be opened when appending ;RECOVER=1 to the database URL.
@changelog_1307_li
@changelog_1310_li
#The Japanese translation of the error messages and the H2 Console has been completed by Masahiro Ikemoto (Arizona Design Inc.)
@changelog_1308_li
@changelog_1311_li
#Updates made to updatable rows are now visible within the same result set. DatabaseMetaData.ownUpdatesAreVisible now returns true.
@changelog_1309_li
@changelog_1312_li
#ParameterMetaData now returns the correct data for INSERT and UPDATE statements.
@changelog_1310_li
@changelog_1313_li
#H2 Shell: DESCRIBE now supports an schema name.
@changelog_1311_li
@changelog_1314_li
#A subset of the PostgreSQL 'dollar quoting' feature is now supported.
@changelog_1312_li
@changelog_1315_li
#SLF4J is now supported by using adding TRACE_LEVEL_FILE=4 to the database URL.
@changelog_1313_li
@changelog_1316_li
#The recovery tool did not work if the table name contained spaces or if there was a comment on the table.
@changelog_1314_li
@changelog_1317_li
#Triggers are no longer executed when changing the table structure (ALTER TABLE).
@changelog_1315_li
@changelog_1318_li
#When setting BLOB or CLOB values larger than 65 KB using a remote connection, temporary files were kept on the client longer than required (until the connection was closed or the object is garbage collected). Now they are removed as soon as the PreparedStatement is closed, or when the value is overwritten.
@changelog_1316_li
@changelog_1319_li
#Statements can now be canceled remotely (when using remote connections).
@changelog_1317_li
@changelog_1320_li
#The Shell tool now uses java.io.Console to read the password when using JDK 1.6
@changelog_1318_li
@changelog_1321_li
#When using read-only databases and setting LOG=2, an exception was written to the trace file when closing the database. Fixed.
@changelog_1319_h2
@changelog_1322_h2
#Version 1.0.71 (2008-04-25)
@changelog_1320_li
@changelog_1323_li
#H2 is now dual-licensed under the Eclipse Public License (EPL) and the old 'H2 License' (which is basically MPL).
@changelog_1321_li
@changelog_1324_li
#Sometimes an exception 'File ID mismatch' or 'try to add a record twice' occurred after large records (8 KB or larger) are updated or deleted. See also http://code.google.com/p/h2database/issues/detail?id=22
@changelog_1322_li
@changelog_1325_li
#H2 Console: The tools can now be translated (it didn't work in the last release).
@changelog_1323_li
@changelog_1326_li
#New traditional Chinese translation. Thanks a lot to Derek Chao!
@changelog_1324_li
@changelog_1327_li
#Indexes were not used when enabling the optimization for IN(SELECT...) (system property h2.optimizeInJoin).
@changelog_1325_h2
@changelog_1328_h2
#Version 1.0.70 (2008-04-20)
@changelog_1326_li
@changelog_1329_li
#The plan is to dual-license H2. The additional license is EPL (Eclipse Public License). The current license (MPL, Mozilla Public License) will stay. Current users are not affected because they can keep MPL. EPL is very similar to MPL, the only bigger difference is related to patents (EPL is a bit more business friendly in this regard). See also http://opensource.org/licenses/eclipse-1.0.php, http://www.eclipse.org/legal/eplfaq.php (FAQ), http://blogs.zdnet.com/Burnette/?p=131
@changelog_1327_li
@changelog_1330_li
#Multi version concurrency (MVCC): when a row was updated, and the updated column was not indexed, this update was visible sometimes for other sessions even if it was not committed.
@changelog_1328_li
@changelog_1331_li
#Calling SHUTDOWN on one connection and starting a query on another connection concurrently could result in a Java level deadlock.
@changelog_1329_li
@changelog_1332_li
#New system property h2.enableAnonymousSSL (default: true) to enable anonymous SSL connections.
@changelog_1330_li
@changelog_1333_li
#The precision if SUBSTR is now calculated if possible.
@changelog_1331_li
@changelog_1334_li
#The autocomplete in the H2 Console has been improved a bit.
@changelog_1332_li
@changelog_1335_li
#The tools in the H2 Console are now translatable.
@changelog_1333_li
@changelog_1336_li
#The servlet and lucene jar files are now automatically downloaded when building.
@changelog_1334_li
@changelog_1337_li
#The code switch tool has been replaced by a simpler tool called SwitchSource that just uses find and replace.
@changelog_1335_li
@changelog_1338_li
#Started to write a Ant replacement ('JAnt') that uses pure Java build definitions. Advantages: ability to debug the build, extensible, flexible, no XML, a bit faster. Future plan: support creating custom h2 distributions (for embedded use). Maybe create a new project 'Jant' or 'Javen' if other people are interested.
@changelog_1336_li
@changelog_1339_li
#The jar file is now about 10% smaller because the variable debugging info is no longer included. The source file and line number debugging info is still included. If required, the jar file size of the full version can be further reduced to about 720 KB using 'build jarSmall' or even more by removing unneeded components.
@changelog_1337_li
@changelog_1340_li
#Added shell scripts run.sh and build.sh. chmod +x is required, but otherwise it should work. Feedback or improvements are welcome!
@changelog_1338_li
@changelog_1341_li
#Databases in zip files: large queries are now supported. Temp files are created in the temp directory if required. The documentation how to create the zip file has been corrected.
#The Japanese translation of the error messages and the H2 Console has been improved. Thanks a lot to Masahiro IKEMOTO.
@changelog_1341_li
@changelog_1344_li
#Optimization for MIN() and MAX() when using MVCC.
@changelog_1342_li
@changelog_1345_li
#To protect against remote brute force password attacks, the delay after each unsuccessful login now gets double as long. New system properties h2.delayWrongPasswordMin and h2.delayWrongPasswordMax.
@changelog_1343_li
@changelog_1346_li
#After setting the query timeout and then resetting it, the next query would still timeout. Fixed.
@changelog_1344_li
@changelog_1347_li
#Adding a IDENTITY column to a table with data threw a lock timeout.
@changelog_1345_li
@changelog_1348_li
#OutOfMemoryError could occur when using EXISTS or IN(SELECT ..).
@changelog_1346_li
@changelog_1349_li
#The built-in connection pool is not called JdbcConnectionPool. The API and documentation has been changed.
@changelog_1347_li
@changelog_1350_li
#The ConvertTraceFile tool now generates SQL statement statistics at the end of the SQL script file (similar to the profiling data generated when using java -Xrunhprof).
@changelog_1348_li
@changelog_1351_li
#Nested joins are now supported (A JOIN B JOIN C ON .. ON ..)
@download_1000_h1
ダウンロード
@download_1001_h3
#Version 1.1.111 (2009-04-10)
#Version 1.1.112 (2009-05-01)
@download_1002_a
Windows Installer
...
...
@@ -2221,7 +2230,7 @@ Windows Installer
Platform-Independent Zip
@download_1004_h3
#Version 1.1.110 (2009-04-03, Last Stable)
#Version 1.1.111 (2009-04-10, Last Stable)
@download_1005_a
Windows Installer
...
...
@@ -5836,7 +5845,7 @@ H2 データベース エンジン
ダウンロード
@mainWeb_1007_td
#Version 1.1.111 (2009-04-10):
#Version 1.1.112 (2009-05-01):
@mainWeb_1008_a
#Windows Installer (3.3 MB)
...
...
@@ -7912,699 +7921,696 @@ SQLコマンドがコマンドエリアに表示されます。
#Native fulltext search: min word length; store word positions
@roadmap_1156_li
#FTP Server: Implement a client to send / receive files to server (dir, get, put)
#Recursive Queries (see details)
@roadmap_1157_li
#FTP Server: Implement SFTP / FTPS
#Add an option to the SCRIPT command to generate only portable / standard SQL
@roadmap_1158_li
#Add an option to the SCRIPT command to generate only portable / standard SQL
#Test Dezign for Databases (http://www.datanamic.com)
@roadmap_1159_li
#Test Dezign for Databases (http://www.datanamic.com)
#Fast library for parsing / formatting: http://javolution.org/
@roadmap_1160_li
#Fast library for parsing / formatting: http://javolution.org/
#Updatable Views (simple cases first)
@roadmap_1161_li
#Updatable Views (simple cases first)
#Improve create index performance
@roadmap_1162_li
#Improve create index performance
#Implement more JDBC 4.0 features
@roadmap_1163_li
#Implement more JDBC 4.0 features
#Support TRANSFORM / PIVOT as in MS Access
@roadmap_1164_li
#Support TRANSFORM / PIVOT as in MS Access
#SELECT * FROM (VALUES (...), (...), ....) AS alias(f1, ...)
@roadmap_1165_li
#SELECT * FROM (VALUES (...), (...), ....) AS alias(f1, ...)
#Support updatable views with join on primary keys (to extend a table)
@roadmap_1166_li
#Support updatable views with join on primary keys (to extend a table)
#Public interface for functions (not public static)
@roadmap_1167_li
#Public interface for functions (not public static)
#Autocomplete: if I type the name of a table that does not exist (should say: syntax not supported)
@roadmap_1168_li
#Autocomplete: if I type the name of a table that does not exist (should say: syntax not supported)
#Document FTP server, including -ftpTask option to execute / kill remote processes
@roadmap_1169_li
#Document FTP server, including -ftpTask option to execute / kill remote processes
#Eliminate undo log records if stored on disk (just one pointer per block, not per record)
@roadmap_1170_li
#Eliminate undo log records if stored on disk (just one pointer per block, not per record)
#Feature matrix like in <a href="http://www.inetsoftware.de/products/jdbc/mssql/features/default.asp">i-net software</a> .
@roadmap_1171_li
#Feature matrix like in <a href="http://www.inetsoftware.de/products/jdbc/mssql/features/default.asp">i-net software</a> .
#Updatable result set on table without primary key or unique index
@roadmap_1172_li
#Updatable result set on table without primary key or unique index
#Use LinkedList instead of ArrayList where applicable
@roadmap_1173_li
#Use LinkedList instead of ArrayList where applicable
#Support % operator (modulo)
@roadmap_1174_li
#Support % operator (modulo)
#Support 1+'2'=3, '1'+'2'='12' (MS SQL Server compatibility)
@roadmap_1175_li
#Support 1+'2'=3, '1'+'2'='12' (MS SQL Server compatibility)
#Support nested transactions
@roadmap_1176_li
#Support nested transactions
#Add a benchmark for big databases, and one for many users
@roadmap_1177_li
#Add a benchmark for big databases, and one for many users
#Compression in the result set (repeating values in the same column) over TCP/IP
@roadmap_1178_li
#Compression in the result set (repeating values in the same column) over TCP/IP
#Support multiple directories (on different hard drives) for the same database
@roadmap_1203_li
#Allow execution time prepare for SELECT * FROM CSVREAD(?, 'columnNameString')
#Server protocol: use challenge response authentication, but client sends hash(user+password) encrypted with response
@roadmap_1204_li
#Support multiple directories (on different hard drives) for the same database
#Support EXEC[UTE] (doesn't return a result set, compatible to MS SQL Server)
@roadmap_1205_li
#Server protocol: use challenge response authentication, but client sends hash(user+password) encrypted with response
#Support native XML data type
@roadmap_1206_li
#Support EXEC[UTE] (doesn't return a result set, compatible to MS SQL Server)
#Support triggers with a string property or option: SpringTrigger, OSGITrigger
@roadmap_1207_li
#Support native XML data type
#Clustering: adding a node should be very fast and without interrupting clients (very short lock)
@roadmap_1208_li
#Support triggers with a string property or option: SpringTrigger, OSGITrigger
#Support materialized views (using triggers)
@roadmap_1209_li
#Clustering: adding a node should be very fast and without interrupting clients (very short lock)
#Store dates in local time zone (portability of database files)
@roadmap_1210_li
#Support materialized views (using triggers)
#Ability to resize the cache array when resizing the cache
@roadmap_1211_li
#Store dates in local time zone (portability of database files)
#Time based cache writing (one second after writing the log)
@roadmap_1212_li
#Ability to resize the cache array when resizing the cache
#Check state of H2 driver for DDLUtils: https://issues.apache.org/jira/browse/DDLUTILS-185
@roadmap_1213_li
#Time based cache writing (one second after writing the log)
#Index usage for REGEXP LIKE.
@roadmap_1214_li
#Check state of H2 driver for DDLUtils: https://issues.apache.org/jira/browse/DDLUTILS-185
#Compatibility: add a role DBA (like ADMIN).
@roadmap_1215_li
#Index usage for REGEXP LIKE.
#Better support multiple processors for in-memory databases.
@roadmap_1216_li
#Compatibility: add a role DBA (like ADMIN).
#Access rights: remember the owner of an object. COMMENT: allow owner of object to change it.
@roadmap_1217_li
#Better support multiple processors for in-memory databases.
#Access rights: Finer grained access control (grant access for specific functions)
@roadmap_1218_li
#Access rights: remember the owner of an object. COMMENT: allow owner of object to change it.
#Support N'text'
@roadmap_1219_li
#Access rights: Finer grained access control (grant access for specific functions)
#Support SCOPE_IDENTITY() to avoid problems when inserting rows in a trigger
@roadmap_1220_li
#Support N'text'
#Set a connection read only (Connection.setReadOnly)
@roadmap_1221_li
#Support SCOPE_IDENTITY() to avoid problems when inserting rows in a trigger
#In MySQL mode, for AUTO_INCREMENT columns, don't set the primary key
@roadmap_1222_li
#Set a connection read only (Connection.setReadOnly)
#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_1223_li
#In MySQL mode, for AUTO_INCREMENT columns, don't set the primary key
#Support compatibility for jdbc:hsqldb:res:
@roadmap_1224_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).
#Provide an Java SQL builder with standard and H2 syntax
@roadmap_1225_li
#Support compatibility for jdbc:hsqldb:res:
#Trace: write OS, file system, JVM,... when opening the database
@roadmap_1226_li
#Provide an Java SQL builder with standard and H2 syntax
#Support indexes for views (probably requires materialized views)
@roadmap_1227_li
#Trace: write OS, file system, JVM,... when opening the database
#Document SET SEARCH_PATH, BEGIN, EXECUTE, parameters
@roadmap_1228_li
#Support indexes for views (probably requires materialized views)
#Browser: use Desktop.isDesktopSupported and browse when using JDK 1.6
@roadmap_1229_li
#Document SET SEARCH_PATH, BEGIN, EXECUTE, parameters
#Server: use one listener (detect if the request comes from an PG or TCP client)
@roadmap_1230_li
#Browser: use Desktop.isDesktopSupported and browse when using JDK 1.6
#Store dates as 'local'. Existing files use GMT. Use escape syntax for compatibility.
@roadmap_1231_li
#Server: use one listener (detect if the request comes from an PG or TCP client)
#Support data type INTERVAL
@roadmap_1232_li
#Store dates as 'local'. Existing files use GMT. Use escape syntax for compatibility.
#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_1259_li
#Write an article about SQLInjection (h2\src\docsrc\html\images\SQLInjection.txt)
@roadmap_1261_li
@roadmap_1260_li
#Convert SQL-injection-2.txt to html document, include SQLInjection.java sample
@roadmap_1262_li
@roadmap_1261_li
#Improve LOB in directories performance
@roadmap_1263_li
@roadmap_1262_li
#Web site design: http://www.igniterealtime.org/projects/openfire/index.jsp
@roadmap_1264_li
@roadmap_1263_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_1264_li
#Web site: Rename Performance to Comparison [/Compatibility], move Comparison to Other Database Engines to Comparison, move Products that Work with H2 to Comparison, move Performance Tuning to Advanced Topics
@roadmap_1266_li
@roadmap_1265_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
@roadmap_1267_li
@roadmap_1266_li
#Translation: use ?? in help.csv
@roadmap_1268_li
@roadmap_1267_li
#Translated .pdf
@roadmap_1269_li
@roadmap_1268_li
#Cluster: hot deploy (adding a node at runtime)
@roadmap_1270_li
@roadmap_1269_li
#MySQL compatibility: update test1 t1, test2 t2 set t1.id = t2.id where t1.id = t2.id;
@roadmap_1271_li
@roadmap_1270_li
#Recovery tool: bad blocks should be converted to INSERT INTO SYSTEM_ERRORS(...), and things should go into the .trace.db file
@roadmap_1272_li
@roadmap_1271_li
#RECOVER=2 to backup the database, run recovery, open the database
@roadmap_1273_li
@roadmap_1272_li
#Recovery should work with encrypted databases
@roadmap_1274_li
@roadmap_1273_li
#Corruption: new error code, add help
@roadmap_1275_li
@roadmap_1274_li
#Space reuse: after init, scan all storages and free those that don't belong to a live database object
@roadmap_1276_li
@roadmap_1275_li
#SysProperties: change everything to H2_...
@roadmap_1277_li
@roadmap_1276_li
#Use FilterIn / FilterOut putStream?
@roadmap_1278_li
@roadmap_1277_li
#Access rights: add missing features (users should be 'owner' of objects; missing rights for sequences; dropping objects)
@roadmap_1279_li
@roadmap_1278_li
#Support NOCACHE table option (Oracle)
@roadmap_1280_li
@roadmap_1279_li
#Index usage for UPDATE ... WHERE .. IN (SELECT...)
@roadmap_1281_li
@roadmap_1280_li
#Add regular javadocs (using the default doclet, but another css) to the homepage.
@roadmap_1282_li
@roadmap_1281_li
#The database should be kept open for a longer time when using the server mode.
@roadmap_1283_li
@roadmap_1282_li
#Javadocs: for each tool, add a copy & paste sample in the class level.
@roadmap_1284_li
@roadmap_1283_li
#Javadocs: add @author tags.
@roadmap_1285_li
@roadmap_1284_li
#Fluent API for tools: Server.createTcpServer().setPort(9081).setPassword(password).start();
@roadmap_1286_li
@roadmap_1285_li
#MySQL compatibility: real SQL statement for DESCRIBE TEST
@roadmap_1287_li
@roadmap_1286_li
#Use a default delay of 1 second before closing a database.
@roadmap_1288_li
@roadmap_1287_li
#Write (log) to system table before adding to internal data structures.
@roadmap_1289_li
@roadmap_1288_li
#Support very large deletes and updates.
@roadmap_1290_li
@roadmap_1289_li
#Doclet (javadocs): constructors are not listed.
@roadmap_1291_li
@roadmap_1290_li
#Support direct lookup for MIN and MAX when using WHERE (see todo.txt / Direct Lookup).
@roadmap_1292_li
@roadmap_1291_li
#Support other array types (String[], double[]) in PreparedStatement.setObject(int, Object);
@roadmap_1293_li
@roadmap_1292_li
#MVCC should not be memory bound (uncommitted data is kept in memory in the delta index; maybe using a regular btree index solves the problem).
@roadmap_1294_li
@roadmap_1293_li
#Oracle compatibility: support NLS_DATE_FORMAT.
@roadmap_1295_li
@roadmap_1294_li
#Support flashback queries as in Oracle.
@roadmap_1296_li
@roadmap_1295_li
#Import / Export of fixed with text files.
@roadmap_1297_li
@roadmap_1296_li
#Support OUT parameters in user-defined procedures.
@roadmap_1298_li
@roadmap_1297_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_1299_li
@roadmap_1298_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_1300_li
@roadmap_1299_li
#Improve the optimizer to select the right index for special cases: where id between 2 and 4 and booleanColumn
@roadmap_1301_li
@roadmap_1300_li
#Linked tables: make hidden columns available (Oracle: rowid and ora_rowscn columns).
@roadmap_1302_li
@roadmap_1301_li
#Support merge join.
@roadmap_1303_li
@roadmap_1302_li
#H2 Console: in-place autocomplete.
@roadmap_1304_li
@roadmap_1303_li
#Oracle: support DECODE method (convert to CASE WHEN).
@roadmap_1305_li
@roadmap_1304_li
#Support large databases: split LOB (BLOB, CLOB) to multiple directories / disks (similar to tablespaces).
@roadmap_1306_li
@roadmap_1305_li
#Support to assign a primary key index a user defined name.
@roadmap_1307_li
@roadmap_1306_li
#Cluster: Add feature to make sure cluster nodes can not get out of sync (for example by stopping one process).
@roadmap_1308_li
@roadmap_1307_li
#H2 Console: support configuration option for fixed width (monospace) font.
@roadmap_1309_li
@roadmap_1308_li
#Native fulltext search: support analyzers (specially for Chinese, Japanese).
@roadmap_1310_li
@roadmap_1309_li
#Automatically compact databases from time to time (as a background process).
@roadmap_1311_li
@roadmap_1310_li
#Support SCOPE_IDENTITY().
@roadmap_1312_li
@roadmap_1311_li
#Support GRANT SELECT, UPDATE ON *.
@roadmap_1313_li
@roadmap_1312_li
#Test Eclipse DTP.
@roadmap_1314_li
@roadmap_1313_li
#H2 Console: autocomplete: keep the previous setting
@roadmap_1315_li
@roadmap_1314_li
#MySQL, MS SQL Server compatibility: support case sensitive (mixed case) identifiers without quotes.
@roadmap_1316_li
@roadmap_1315_li
#executeBatch: option to stop at the first failed statement.
@roadmap_1317_li
@roadmap_1316_li
#Implement OLAP features as described here: http://www.devx.com/getHelpOn/10MinuteSolution/16573/0/page/5
@roadmap_1318_li
@roadmap_1317_li
#Support Oracle ROWID (unique identifier for each row).
@roadmap_1319_li
@roadmap_1318_li
#Server mode: Improve performance for batch updates.
@roadmap_1320_li
@roadmap_1319_li
#Applets: Support read-only databases in a zip file (accessed as a resource).
@roadmap_1321_li
@roadmap_1320_li
#Long running queries / errors / trace system table.
@roadmap_1322_li
@roadmap_1321_li
#H2 Console should support JaQu directly.
@roadmap_1323_li
@roadmap_1322_li
#H2 Console: support single file upload and directory download (optional).
@roadmap_1324_li
@roadmap_1323_li
#Document FTL_SEARCH, FTL_SEARCH_DATA.
@roadmap_1325_li
@roadmap_1324_li
#Sequences: CURRVAL should be session specific. Compatibility with PostgreSQL.
@roadmap_1326_li
@roadmap_1325_li
#Support DatabaseMetaData.insertsAreDetected: updatable result sets should detect inserts.
@roadmap_1327_li
@roadmap_1326_li
#Auto-server: add option to define the IP address range or list.
@roadmap_1328_li
@roadmap_1327_li
#Index creation only using deterministic functions.
@roadmap_1329_li
@roadmap_1328_li
#Use http://recaptcha.net somehow to secure the Google Group.
@roadmap_1330_li
@roadmap_1329_li
#Support DELETE with TOP or LIMIT. See also: http://dev.mysql.com/doc/refman/5.1/de/delete.html
@roadmap_1331_li
@roadmap_1330_li
#Change the default for NULL || 'x' to return NULL
@roadmap_1332_li
@roadmap_1331_li
#ANALYZE: Use a bloom filter for each indexed column to estimate count of distinct values.
@roadmap_1333_li
@roadmap_1332_li
#ANALYZE: For unique indexes that allow null, count the number of null.
@roadmap_1334_li
@roadmap_1333_li
#AUTO_SERVER: support changing IP addresses (disable a network while the database is open).
@roadmap_1335_li
@roadmap_1334_li
#Avoid using java.util.Calendar internally because it's slow, complicated, and seems to be buggy.
@roadmap_1336_li
@roadmap_1335_li
#Support TRUNCATE .. CASCADE like PostgreSQL.
@roadmap_1337_li
@roadmap_1336_li
#Support opening a database that is in the classpath, maybe using a new file system.
@roadmap_1338_li
@roadmap_1337_li
#Fulltext search: lazy result generation using SimpleRowSource.
@roadmap_1339_li
@roadmap_1338_li
#Support transformation to join for user defined functions, as for IN(SELECT...).
@roadmap_1340_li
@roadmap_1339_li
#Fulltext search: Support alternative syntax: WHERE FTL_CONTAINS(name, 'hello').
@roadmap_1341_li
@roadmap_1340_li
#MySQL compatibility: support REPLACE, see http://dev.mysql.com/doc/refman/5.1/de/replace.html
@roadmap_1342_li
@roadmap_1341_li
#MySQL compatibility: support INSERT INTO table SET column1 = value1, column2 = value2
@roadmap_1343_li
@roadmap_1342_li
#Docs: Add a one line description for each functions and SQL statements at the top (in the link section).
@roadmap_1344_li
@roadmap_1343_li
#Javadoc search: weight for titles should be higher ('random' should list Functions as the best match).
@roadmap_1345_li
@roadmap_1344_li
#Replace information_schema tables with regular tables that are automatically re-built when needed. Use indexes.
@roadmap_1346_li
@roadmap_1345_li
#Support a special trigger on all tables.
@roadmap_1347_li
@roadmap_1346_li
#Delete temporary files or objects using finalize.
@roadmap_1348_li
@roadmap_1347_li
#Oracle compatibility: support calling 0-parameters functions without parenthesis. Make constants obsolete.
@roadmap_1349_li
@roadmap_1348_li
#MySQL, HSQLDB compatibility: support where 'a'=1 (not supported by Derby, PostgreSQL)
@roadmap_1350_li
@roadmap_1349_li
#Allow calling function with no parameters without parenthesis. See http://code.google.com/p/h2database/issues/detail?id=50
@roadmap_1351_li
@roadmap_1350_li
#CSV: currently # is a line comment and can start at any field. Make it optional.
@roadmap_1352_li
@roadmap_1351_li
#Add database creation date and time to the database.
