You need to install a JDK, for example the Sun JDK version 1.5 or 1.6. Ensure that Java binary directory is included in the <code>PATH</code> environment variable, and that the environment variable <code>JAVA_HOME</code> points to your Java installation. On the command line, go to the directory <code>h2</code> and execute the following command:
@build_1027_p
@build_1028_p
For Linux and OS X, use <code>./build.sh</code> instead of <code>build</code>.
@build_1028_p
@build_1029_p
You will get a list of targets. If you want to build the <code>jar</code> file, execute (Windows):
@build_1029_h3
@build_1030_h3
Switching the Source Code
@build_1030_p
@build_1031_p
By default the source code uses Java 1.5 features, however Java 1.6 is supported as well. To switch the source code to the installed version of Java, run:
@build_1031_h2
@build_1032_h2
Build Targets
@build_1032_p
@build_1033_p
The build system can generate smaller jar files as well. The following targets are currently supported:
@build_1033_code
@build_1034_code
jarClient
@build_1034_li
@build_1035_li
creates the file <code>h2client.jar</code>. This only contains the JDBC client.
@build_1035_code
@build_1036_code
jarSmall
@build_1036_li
@build_1037_li
creates the file <code>h2small.jar</code>. This only contains the embedded database. Debug information is disabled.
@build_1037_code
@build_1038_code
jarJaqu
@build_1038_li
@build_1039_li
creates the file <code>h2jaqu.jar</code>. This only contains the JaQu (Java Query) implementation. All other jar files do not include JaQu.
@build_1039_code
@build_1040_code
javadocImpl
@build_1040_li
@build_1041_li
creates the Javadocs of the implementation.
@build_1041_p
@build_1042_p
To create the file <code>h2client.jar</code>, go to the directory <code>h2</code> and execute the following command:
@build_1042_h2
@build_1043_h2
Using Maven 2
@build_1043_h3
@build_1044_h3
Using a Central Repository
@build_1044_p
@build_1045_p
You can include the database in your Maven 2 project as a dependency. Example:
@build_1045_p
@build_1046_p
New versions of this database are first uploaded to http://hsql.sourceforge.net/m2-repo/ and then automatically synchronized with the main Maven repository; however after a new release it may take a few hours before they are available there.
@build_1046_h3
@build_1047_h3
Using Snapshot Version
@build_1047_p
@build_1048_p
To build a <code>h2-*-SNAPSHOT.jar</code> file and upload it the to the local Maven 2 repository, execute the following command:
@build_1048_p
@build_1049_p
Afterwards, you can include the database in your Maven 2 project as a dependency:
@build_1049_h2
@build_1050_h2
Translating
@build_1050_p
@build_1051_p
The translation of this software is split into the following parts:
Web site: <code>src/docsrc/text/_docs_*.utf8.txt</code>
@build_1054_p
@build_1055_p
To translate the H2 Console, start it and select Preferences / Translate. The conversion between UTF-8 and Java encoding (using the <code>\u</code> syntax), as well as the HTML entities (<code>&#..;</code>) is automated by running the tool <code>PropertiesToUTF8</code>. The web site translation is automated as well, using <code>build docs</code>.
@build_1055_h2
@build_1056_h2
Providing Patches
@build_1056_p
@build_1057_p
If you like to provide patches, please consider the following guidelines to simplify merging them:
@build_1057_li
@build_1058_li
Only use Java 1.5 features (do not use Java 1.6) (see <a href="#environment">Environment</a>).
@build_1058_li
@build_1059_li
Follow the coding style used in the project, and use Checkstyle (see above) to verify. For example, do not use tabs (use spaces instead). The checkstyle configuration is in <code>src/installer/checkstyle.xml</code>.
@build_1059_li
@build_1060_li
Please provide test cases and integrate them into the test suite. For Java level tests, see <code>src/test/org/h2/test/TestAll.java</code>. For SQL level tests, see <code>src/test/org/h2/test/test.in.txt</code> or <code>testSimple.in.txt</code>.
@build_1060_li
@build_1061_li
The test cases should cover at least 90% of the changed and new code; use a code coverage tool to verify that (see above). or use the build target <code>coverage</code>.
@build_1061_li
@build_1062_li
Verify that you did not break other features: run the test cases by executing <code>build test</code>.
@build_1062_li
@build_1063_li
Provide end user documentation if required (<code>src/docsrc/html/*</code>).
@build_1063_li
@build_1064_li
Document grammar changes in <code>src/docsrc/help/help.csv</code>
@build_1064_li
@build_1065_li
Provide a change log entry (<code>src/docsrc/html/changelog.html</code>).
@build_1065_li
@build_1066_li
Verify the spelling using <code>build spellcheck</code>. If required add the new words to <code>src/tools/org/h2/build/doc/dictionary.txt</code>.
@build_1066_li
@build_1067_li
Run <code>src/installer/buildRelease</code> to find and fix formatting errors.
@build_1067_li
@build_1068_li
Verify the formatting using <code>build docs</code> and <code>build javadoc</code>.
@build_1068_li
@build_1069_li
Submit patches as <code>.patch</code> files (compressed if big). To create a patch using Eclipse, use Team / Create Patch.
@build_1069_p
@build_1070_p
For legal reasons, patches need to be public in the form of an email to the <a href="http://groups.google.com/group/h2-database">group</a>, or in the form of an <a href="http://code.google.com/p/h2database/issues/list">issue report or attachment</a>. Significant contributions need to include the following statement:
@build_1070_p
@build_1071_p
"I wrote the code, it's mine, and I'm contributing it to H2 for distribution multiple-licensed under the H2 License, version 1.0, and under the Eclipse Public License, version 1.0 (http://h2database.com/html/license.html)."
@build_1071_h2
@build_1072_h2
Automated Build
@build_1072_p
@build_1073_p
This build process is automated and runs regularly. The build process includes running the tests and code coverage, using the command line <code>./build.sh clean jar coverage -Dh2.ftpPassword=... uploadBuild</code>. The last results are available here:
@build_1073_a
@build_1074_a
Test Output
@build_1074_a
@build_1075_a
Code Coverage Summary
@build_1075_a
@build_1076_a
Code Coverage Details (download, 1.3 MB)
@build_1076_a
@build_1077_a
Build Newsfeed
@build_1077_a
@build_1078_a
Latest Jar File (download, 1 MB)
@build_1079_h2
Generating Railroad Diagrams
@build_1080_p
The railroad diagrams are HTML, formatted as nested tables. The diagrams are generated as follows:
@build_1081_li
The BNF parser (<code>org.h2.bnf.Bnf</code>) reads and parses the BNF from the file <code>help.csv</code>.
@build_1082_li
The page parser (<code>org.h2.server.web.PageParser</code>) reads the template HTML file and fills in the diagrams.
@build_1083_li
The rail images (one straight, four junctions, two turns) are generated using a simple Java application.
@build_1084_p
To generate railroad diagrams for other grammars, see the package <code>org.h2.jcr</code>. This package is used to generate the SQL-2 railroad diagrams for the JCR 2.0 specification.
@changelog_1000_h1
Change Log
...
...
@@ -1319,979 +1340,952 @@ Change Log
Next Version (unreleased)
@changelog_1002_li
Clustering: there is now a way to detect which cluster instances are running.
The newsfeeds are now Atom 1.0 standard compliant according to
@changelog_1003_li
The database is now closed after an out of memory exception, because the database could get corrupt otherwise.
@changelog_1004_h2
Version 1.2.124 (2009-11-20)
@changelog_1005_li
Clustering: there is now a way to detect which cluster instances are running.
@changelog_1006_li
ConvertTraceFile: the SQL statement statistics are better formatted (newline are removed).
@changelog_1004_li
@changelog_1007_li
The file lock thread is now stopped when the database is closed.
@changelog_1005_li
@changelog_1008_li
Issue 140: the Script tool now supports writing to a stream.
@changelog_1006_li
@changelog_1009_li
Issue 138: the trace output of Statement.execute(String, int) and executeUpdate was incorrect.
@changelog_1007_li
@changelog_1010_li
Page store: new databases can not be opened with older versions.
@changelog_1008_li
@changelog_1011_li
Page store: multi-column indexes didn't work if the cache was very small.
@changelog_1009_li
@changelog_1012_li
Page store: opening a database could theoretically result in an endless loop.
@changelog_1010_li
@changelog_1013_li
Page store: adding large indexed columns could get very slow.
@changelog_1011_li
@changelog_1014_li
Page store: after a duplicate key exception, an ArrayIndexOutOfBoundsException could be thrown (only for very large rows).
@changelog_1012_li
@changelog_1015_li
Page store: the recover tool sometimes generated a script file that contained duplicate data.
@changelog_1013_li
@changelog_1016_li
Page store: sometimes opening a read-only database failed.
@changelog_1014_li
@changelog_1017_li
Page store: opening a database sometimes failed if large rows where updated, or if a table was truncated before.
@changelog_1015_li
@changelog_1018_li
Page store: when using a very small page size (128 bytes or smaller), writing a large row could result in an endless recursion. This is only a theoretical problem, as the page size is 2 KB.
@changelog_1016_li
@changelog_1019_li
Page store: getting the min value from a descending index with NULL entries could return the wrong result.
@changelog_1017_li
@changelog_1020_li
Page store: improved auto-recovery after power failure.
@changelog_1018_li
@changelog_1021_li
The JDBC client did not detect that it was not talking to an H2 server. This could result in strange exceptions when trying to connect to another kind of server.
@changelog_1019_li
@changelog_1022_li
User defined functions can be created with source code. Example: CREATE ALIAS HI AS 'String hi() { return "Hello"; }'
@changelog_1020_li
@changelog_1023_li
Database file lock: the exception "lock file modified in the future" is longer thrown; instead, opening the file will be delayed by 2 seconds.
@changelog_1021_li
@changelog_1024_li
Inserting LOBs got slower each time the process was restarted. It could loop endlessly after about 1000 process restarts.
@changelog_1022_li
@changelog_1025_li
Issue 117: Multi-version concurrency: concurrent MERGE statements now work.
@changelog_1023_li
@changelog_1026_li
Improved read-only database detection.
@changelog_1024_h2
@changelog_1027_h2
Version 1.2.123 (2009-11-08)
@changelog_1025_li
@changelog_1028_li
Page store: new databases can not be opened with older versions.
@changelog_1026_li
@changelog_1029_li
Page store: updating large rows (rows with more than 2000 bytes of data) could corrupt the database.
@changelog_1027_li
@changelog_1030_li
Page store: inserting very large rows failed with ArrayIndexOutOfBoundsException.
@changelog_1028_li
@changelog_1031_li
When using multi-threaded kernel mode, setting disabling locking (LOCK_MODE=0) will now throw an exception. At this time this combination will result in corruption when multiple threads try to update the same table.
@changelog_1029_li
@changelog_1032_li
The fulltext search methods and fields are now protected instead of private, to make the classes more easily extensible.
@changelog_1030_li
@changelog_1033_li
The Lucene fulltext search now also returns the score.
@changelog_1031_li
@changelog_1034_li
New function SCOPE_IDENTITY() to avoid problems when inserting rows in a trigger.
@changelog_1032_li
@changelog_1035_li
Statement.getGeneratedKeys() returned the wrong value if a trigger changed the identity value after inserting the row.
@changelog_1033_li
@changelog_1036_li
Improved error messages: identifiers and values are now quoted.
@changelog_1034_li
@changelog_1037_li
Improved error message when casting a value failed: the column name and type is included in the message.
@changelog_1035_li
@changelog_1038_li
Improved support for GAE for Java thanks to Vince Bonfanti.
@changelog_1036_h2
@changelog_1039_h2
Version 1.2.122 (2009-10-28)
@changelog_1037_li
@changelog_1040_li
The native fulltext search now supports streaming CLOB data.
@changelog_1038_li
@changelog_1041_li
If the database URL ends with ;PAGE_STORE=TRUE and a database in the old format exists, it is automatically converted to the new page store format if possible. A backup of the database is created first. Automatic conversion is not supported if the database was not closed normally (if it contains uncommitted transactions).
@changelog_1039_li
@changelog_1042_li
Dropping the current user is now allowed if another admin user exists.
@changelog_1040_li
@changelog_1043_li
Values of type BINARY or BLOB could not be converted to the data type OTHER.
@changelog_1041_li
@changelog_1044_li
SHUTDOWN COMPACT now fully compacts the database.
@changelog_1042_li
@changelog_1045_li
New system properties h2.maxCompactCount and h2.maxCompactTime to allow changing the default behavior (at most 2 seconds compacting when closing the database).
@changelog_1043_li
@changelog_1046_li
New sorted insert optimization (see Performance / Database Performance Tuning).
@changelog_1044_li
@changelog_1047_li
Issue 116: The files h2*-sources.jar and h2*-javadoc.jar are now in the Maven repository.
@changelog_1045_li
@changelog_1048_li
Page store: opening a large database was slow if it was not closed before.
@changelog_1046_li
@changelog_1049_li
Page store: new write and read counters in the meta data table. Use SELECT * FROM INFORMATION_SCHEMA.SETTINGS WHERE NAME IN( 'info.FILE_WRITE_TOTAL', 'info.FILE_WRITE', 'info.FILE_READ', 'info.CACHE_MAX_SIZE', 'info.CACHE_SIZE')
@changelog_1047_li
@changelog_1050_li
The SQL syntax is documented using (railroad) diagrams. The diagrams are HTML.
@changelog_1048_li
@changelog_1051_li
The documentation is no longer available in Japanese because the translation was too much out of sync. Please use the Google translation instead.
@changelog_1049_li
@changelog_1052_li
Certain queries were not sorted if subselect queries were involved
@changelog_1050_li
@changelog_1053_li
More bugs in the server-less multi-connection mode have been fixed: 90097 The database is read only, caches must be cleared on reconnect, etc.
@changelog_1051_h2
@changelog_1054_h2
Version 1.2.121 (2009-10-11)
@changelog_1052_li
@changelog_1055_li
Better support GaeVFS (Google App Engine Virtual File System) thanks to Thanks to Vince Bonfanti.
@changelog_1053_li
@changelog_1056_li
CSVREAD didn't close the file. Thanks to Vince Bonfanti for the patch!
@changelog_1054_li
@changelog_1057_li
If a database in the old format exists, it is now used. The system property is used for new databases, or if databases exist in both formats. In any case, the flag in the URL overrides this logic.
@changelog_1055_li
@changelog_1058_li
Page store bugs were fixed. Large values in indexed columns could corrupt the index.
@changelog_1056_li
@changelog_1059_li
The page store did not work when using Retrotranslator (because the Retrotranslator doesn't support Integer.reverse and Long.reverse).
@changelog_1057_li
@changelog_1060_li
New system property h2.pageStoreTrim to disable shrinking the database when closing (disabled by default, meaning by default the database is trimmed).
@changelog_1058_h2
@changelog_1061_h2
Version 1.2.120 (2009-10-04)
@changelog_1059_li
@changelog_1062_li
This is a beta version.
@changelog_1060_li
@changelog_1063_li
Large updates could throw an ArrayIndexOutOfBoundsException in RowList.writeRow.
@changelog_1061_li
@changelog_1064_li
In version 1.2, the following system properties are now enabled by default: h2.pageStore, h2.nullConcatIsNull, h2.optimizeInList. The default value for h2.defaultMaxLengthInplaceLob is now 4096 (it was 1024 with version 1.1).
@changelog_1062_li
@changelog_1065_li
New databases are now stored in the new 'page store' file format. Existing databases are kept in the old file format. To use the old file format, append ;PAGE_STORE=FALSE to the database URL or set the system property h2.pageStore to false.
@changelog_1063_li
@changelog_1066_li
Issue 125: Renaming primary keys was not persistent. Fixed. Unfortunately, databases created by this version can not be opened with older versions because of this change.
@changelog_1064_li
@changelog_1067_li
Issue 124: Hibernate schema validation failed for decimal/numeric columns. This problem is fixed in the Hibernate dialect that is included with H2 (src/tools/org/hibernate/dialect/H2Dialect.java.txt), but not in Hibernate yet.
@changelog_1065_li
@changelog_1068_li
PostgreSQL compatibility: function LASTVAL() as an alias for IDENTITY().
@changelog_1066_li
@changelog_1069_li
Linked tables now support default values when inserting, updating or merging.
@changelog_1067_li
@changelog_1070_li
Bugfixes in the page store.
@changelog_1068_li
@changelog_1071_li
Possibility to set a vendor id in Constants.java, so that unofficial builds are distinguishable from official releases.
@changelog_1069_li
@changelog_1072_li
Allow writing to linked tables in readonly databases.
@changelog_1070_h2
@changelog_1073_h2
Version 1.1.119 (2009-09-26)
@changelog_1071_li
@changelog_1074_li
SQL statements in the exception message are no longer included if they contain '--hide--'.
@changelog_1072_li
@changelog_1075_li
Temporary local tables did not always work after reconnect if AUTO_SERVER=TRUE
@changelog_1073_li
@changelog_1076_li
New system property h2.defaultMaxLengthInplaceLob to change the default maximum size of an in-place LOB object.
@changelog_1074_li
@changelog_1077_li
New system property h2.nullConcatIsNull to change the default null concatenation behavior. The default will be enabled in version 1.2.
@changelog_1075_li
@changelog_1078_li
The cache algorithm TQ is disabled in this version, because it is unstable, and because the current implementation does not have any measurable advantages over the default.
@changelog_1076_li
@changelog_1079_li
New committer: Christian Peter. He works for <a href="http://www.docware.com">Docware</a> and helped a lot finding and fixing bugs, and generally improving the database. He is now a committer.
@changelog_1077_li
@changelog_1080_li
ChangeFileEncryption did not work with Lob subdirectories. Fixed.
@changelog_1078_li
@changelog_1081_li
Issue 121: JaQu: new simple update and merge methods.
@changelog_1079_li
@changelog_1082_li
Issue 120: JaQu didn't close result sets.
@changelog_1080_li
@changelog_1083_li
Issue 119: JaQu creates wrong WHERE conditions on some inputs.
@changelog_1081_li
@changelog_1084_li
The new page store mechanism is now alpha-level quality. The next release will most likely be "1.2.120 beta" where this mode is enabled by default. To use it right now, append ;PAGE_STORE=TRUE to the database URL. The file format of this mode will probably not change any more.
@changelog_1082_li
@changelog_1085_li
SELECT COUNT(*) FROM SYSTEM_RANGE(...) returned the wrong result. Fixed.
@changelog_1083_li
@changelog_1086_li
The Recover tool now also processes the log files, however applying those changes is still a manual process.
@changelog_1084_li
@changelog_1087_li
New sample application that shows how to pass data to a trigger.
@changelog_1085_li
@changelog_1088_li
More bugs in the server-less multi-connection mode have been fixed: On Windows, two processes could write to the same database at the same time.
@changelog_1086_li
@changelog_1089_li
When loading triggers or other client classes (static functions, database event listener, user aggregate functions, other JDBC drivers), the database now uses the context class loader if the class could not be found using Class.forName().
@changelog_1087_li
@changelog_1090_li
Updating many rows with the same CLOB or BLOB values could result in FileNotFoundException.
@changelog_1088_li
@changelog_1091_li
Statement.getConnection() threw an exception if the connection was already closed.
@changelog_1089_li
@changelog_1092_li
The native fulltext index kept a reference to a database after the database was closed.
@changelog_1090_li
@changelog_1093_li
Non-unique in-memory hash indexes are now supported. Thanks a lot to Sergi Vladykin for the patch!
@changelog_1091_li
@changelog_1094_li
The optimizer does a better job for joins if indexes are missing.
@changelog_1092_h2
@changelog_1095_h2
Version 1.1.118 (2009-09-04)
@changelog_1093_li
@changelog_1096_li
SHOW COLUMNS only listed indexed columns.
@changelog_1094_li
@changelog_1097_li
When calling SHUTDOWN IMMEDIATELY in the server mode, the .trace.db file was not closed.
@changelog_1095_li
@changelog_1098_li
DatabaseMetaData.getPrimaryKeys: the wrong constraint name was reported if there was another constraint on the same table and columns.
@changelog_1096_li
@changelog_1099_li
AUTO_INCREMENT now works in the same way in ALTER TABLE ALTER COLUMN as in CREATE TABLE (it does not create a primary key).
@changelog_1097_li
@changelog_1100_li
Native fulltext search: before searching, FT_INIT() had to be called. This is no longer required.
@changelog_1098_li
@changelog_1101_li
Better support GaeVFS (Google App Engine Virtual File System).
@changelog_1099_li
@changelog_1102_li
JaQu: the plan is to support natural (pure Java / Scala) conditions such as (id == 1 && name.equals("Test")). A proof of concept decompiler is now included (it doesn't work yet).
@changelog_1100_li
@changelog_1103_li
Various bugfixes and improvements in the page store mechanism (still experimental).
@changelog_1101_li
@changelog_1104_li
PreparedStatement.setObject now converts a java.lang.Character to a string.
@changelog_1102_li
@changelog_1105_li
H2 Console: PierPaolo Ucchino has completed the Italian translation. Thanks a lot!
@changelog_1103_li
@changelog_1106_li
Various tools now use Java 5 var-args, such as main the methods and SimpleResultSet.addRow.
@changelog_1104_li
@changelog_1107_li
H2 Console: indexes of tables of non-default schemas are now also listed.
@changelog_1105_li
@changelog_1108_li
Issue 111: Multi-version concurrency / duplicate primary key after rollback.
@changelog_1106_li
@changelog_1109_li
Issue 110: Multi-version concurrency / wrong exception is thrown.
@changelog_1107_li
@changelog_1110_li
Parser: sequenceName.NEXTVAL and CURRVAL did not respect the schema search path.
@changelog_1108_li
@changelog_1111_li
Issue 101: The following sequence could throw the exception "Row not found when trying to delete": start a transaction, insert many rows, delete many rows, rollback. The number of rows depends on the cache size.
@changelog_1109_li
@changelog_1112_li
The stack trace of very common exceptions is no longer written to the .trace.db file by default.
@changelog_1110_li
@changelog_1113_li
An optimization for OR is implemented, but disabled by default. Expressions of the type X=1 OR X=2 are converted to X IN(1, 2). To enable, set the system property h2.optimizeInList to true before loading the H2 JDBC driver.
@changelog_1111_li
@changelog_1114_li
An optimization for IN(..) and IN(SELECT...) is implemented, but disabled by default. To enable, set the system property h2.optimizeInList to true before loading the H2 JDBC driver. If enabled, this overrides h2.optimizeIn and h2.optimizeInJoin. Unlike now, this optimization will also speed up updates and deletes.
@changelog_1112_h2
@changelog_1115_h2
Version 1.1.117 (2009-08-09)
@changelog_1113_li
@changelog_1116_li
New committer: Sam Van Oort has been contributing to H2 since quite some time in many ways (on the mailing list, documentation, and in the form of patches). He is now a committer.
@changelog_1114_li
@changelog_1117_li
JaQu: the order of the fields in the database no longer needs to match the order in the database.
@changelog_1115_li
@changelog_1118_li
Issue 103: MVCC: the setting MAX_MEMORY_UNDO can currently not be supported when using multi-version concurrency, that means the complete undo log must fit in memory.
@changelog_1116_li
@changelog_1119_li
LIKE: the escape mechanism can now be disable using ESCAPE ''. The default escape character can be changed using the system property h2.defaultEscape. The default is still '\' (as in MySQL and PostgreSQL).
@changelog_1117_li
@changelog_1120_li
Views using functions were not re-evaluated when necessary.
@changelog_1118_li
@changelog_1121_li
Improved MySQL compatibility for SHOW COLUMNS.
@changelog_1119_li
@changelog_1122_li
Improved PostgreSQL compatibility for timestamp literals with timezone.
@changelog_1120_li
@changelog_1123_li
Sergi Vladykin translated the error messages to Russian. Thanks a lot!
@changelog_1121_li
@changelog_1124_li
Support for Java 6 DatabaseMetaData.getTables, getColumns, getProcedures, and getProcedureColumns.
@changelog_1122_li
@changelog_1125_li
Issue 101: Rollback of a large transaction (more than 100000 rows) could fail.
@changelog_1123_li
@changelog_1126_li
Various bugfixes and improvements in the page store mechanism (still experimental).
@changelog_1124_li
@changelog_1127_li
The functions LENGTH, OCTET_LENGTH, and BIT_LENGTH now return BIGINT.
@changelog_1125_li
@changelog_1128_li
Data types CLOB and BLOB: the maximum precision was Integer.MAX_VALUE, it is now Long.MAX_VALUE.
@changelog_1126_li
@changelog_1129_li
Multi-threaded kernel: creating and dropping temporary database objects and the potentially free pages list was not correctly synchronized. Thanks a lot to Eric Faulhaber for the test case and patch!
@changelog_1127_li
@changelog_1130_li
Parsing SQL script files is now faster.
@changelog_1128_li
@changelog_1131_li
CSV reading is now faster.
@changelog_1129_li
@changelog_1132_li
SimpleResultSet.newInstance(SimpleRowSource rs) did not work.
@changelog_1130_h2
@changelog_1133_h2
Version 1.1.116 (2009-07-18)
@changelog_1131_li
@changelog_1134_li
Server-less multi-connection mode: more bugs are fixed.
@changelog_1132_li
@changelog_1135_li
The built-in help (INFORMATION_SCHEMA.HELP) is smaller, shrinking the jar file size a bit.
@changelog_1133_li
@changelog_1136_li
H2 Console: column of tables of non-default schemas are now also listed, except for schemas starting with 'INFO'.
@changelog_1134_li
@changelog_1137_li
ALTER TABLE: removing an auto-increment or identity column didn't remove the sequence.
@changelog_1135_li
@changelog_1138_li
Creating indexes is now a bit faster.
@changelog_1136_li
@changelog_1139_li
PG Server: new system property h2.pgClientEncoding to explicitly set the encoding for clients that don't send the encoding (the default encoding is UTF-8). Thanks a lot to Sergi Vladykin for the patch!
@changelog_1137_li
@changelog_1140_li
PG Server: improved compatibility by using the type ids of the PostgreSQL driver. Thanks a lot to Sergi Vladykin for the patch!
@changelog_1138_li
@changelog_1141_li
H2 Console: Oracle system tables are no longer listed, improving performance.
@changelog_1139_li
@changelog_1142_li
Result sets are now read-only except if the statement or prepared statement was created with the concurrency ResultSet.CONCUR_UPDATABLE. This change is required because the old behavior (all result set are updatable) violated the JDBC spec. For backward compatibility, use the system property h2.defaultResultSetConcurrency.
@changelog_1140_li
@changelog_1143_li
New system property h2.defaultResultSetConcurrency to change the default result set concurrency.
@changelog_1141_li
@changelog_1144_li
JDBC: using an invalid result set type or concurrency now throws an exception.
@changelog_1142_li
@changelog_1145_li
If a pooled connection was not closed but garbage collected, a NullPointerException could occur.
@changelog_1143_li
@changelog_1146_li
Fulltext search: a NullPointerException was thrown when updating a value that was NULL previously.
@changelog_1144_li
@changelog_1147_li
The Recover tool did not work with .data.db files of the wrong size.
@changelog_1145_li
@changelog_1148_li
Triggers: if there was an exception when initializing a trigger, this exception could be hidden, and in some cases (specially when using the Lucene fulltext index mechanism) a NullPointerException was thrown later on. Now the exception that occurred on init is thrown when changing data.
@changelog_1146_li
@changelog_1149_li
The soft-references cache (CACHE_TYPE=SOFT_LRU) could throw a NullPointerException.
@changelog_1147_li
@changelog_1150_li
To enable the new page store mechanism, append ;PAGE_STORE=TRUE to the database URL. or set the system property h2.pageStore to true. This mechanism is still experimental, and the file format will change, but it is quite stable now.
@changelog_1148_h2
@changelog_1151_h2
Version 1.1.115 (2009-06-21)
@changelog_1149_li
@changelog_1152_li
The new storage mechanism is now alpha quality. To try it out, set the system property "h2.pageStore" to "true" (java -Dh2.pageStore=true). There are still bugs to be found and fixed, for example inserting many rows references a lot of main memory. Performance is currently about the same as with the regular storage mechanism, but the database file size is smaller. The file format is not stable yet.
@changelog_1150_li
@changelog_1153_li
ALTER TABLE could throw an exception "object already exists" in some cases.
@changelog_1151_li
@changelog_1154_li
Views: in some situations, an ArrayIndexOutOfBoundsException was thrown when using the same view concurrently.
@changelog_1152_li
@changelog_1155_li
java.util.UUID is now supported in PreparedStatement.setObject and user defined Java functions. ResultSet.getObject() returns a java.util.UUID when using the UUID data type.
@changelog_1153_li
@changelog_1156_li
H2 Console: the language was reset to the browser language when disconnecting.
@changelog_1154_li
@changelog_1157_li
H2 Console: improved Polish translation.
@changelog_1155_li
@changelog_1158_li
Server-less multi-connection mode: more bugs are fixed.
@changelog_1156_li
@changelog_1159_li
The download page now included the SHA1 checksums.
@changelog_1157_li
@changelog_1160_li
Shell tool: the file encoding workaround is now documented if you run java org.h2.tools.Shell -?.
@changelog_1158_li
@changelog_1161_li
The RunScript tool and SQL statement did not work with the compression method LZF.
@changelog_1159_li
@changelog_1162_li
Fulltext search: searching for NULL or an empty string threw an exception.
@changelog_1160_li
@changelog_1163_li
Lucene fulltext search: FTL_DROP_ALL did not drop the triggers.
@changelog_1161_li
@changelog_1164_li
Backup: if the database contained CLOB or BLOB data, the backup included a file entry for the LOB directory. This caused the restore to fail.
@changelog_1162_li
@changelog_1165_li
Data types: LONG is now an alias for BIGINT.
@changelog_1163_h2
@changelog_1166_h2
Version 1.1.114 (2009-06-01)
@changelog_1164_li
@changelog_1167_li
ResultSetMetaData.getColumnClassName returned the wrong class for CLOB and BLOB columns.
@changelog_1165_li
@changelog_1168_li
Fulltext search: data is no longer deleted and re-inserted if the indexed columns didn't change.
@changelog_1166_li
@changelog_1169_li
In some situations, an ArrayIndexOutOfBoundsException was thrown when adding rows. This was caused by a bug in the b-tree code.
@changelog_1167_li
@changelog_1170_li
Microsoft Windows Vista: when using the the installer, Vista wrote "This program may not have installed correctly." This message should no longer appear (in the h2.nsi file, the line 'RequestExecutionLevel highest' was added).
@changelog_1168_li
@changelog_1171_li
The Recover tool did not always work when the database contains referential integrity constraints.
@changelog_1169_li
@changelog_1172_li
Java 1.5 is now required to run H2. If required, Retrotranslator can be used to create a Java 1.4 version (http://retrotranslator.sourceforge.net/).
@changelog_1170_h2
@changelog_1173_h2
Version 1.1.113 (2009-05-21)
@changelog_1171_li
@changelog_1174_li
Shell tool: the built-in commands EXIT, HELP, ?, LIST, and so on didn't work with a semicolon at the end.
@changelog_1172_li
@changelog_1175_li
JDK 1.5 is now required to build the jar file. However it is still possible to create a jar file for Java 1.4. For details, see buildRelease.sh and buildRelease.bat. As an alternative, compile using JDK 1.5 or 1.6 and use Retrotranslator to create a Java 1.4 version (http://retrotranslator.sourceforge.net/).
@changelog_1173_li
@changelog_1176_li
When deleting or updating many rows in a table, the space in the index file was not re-used in the default mode (persistent database, b-tree index, LOG=1). This caused the index file to grow over time. Workarounds were to delete and re-created the index file, alter the table (add a remove a column), or append ;LOG=2 to the database URL. To disable the change, set the system property h2.reuseSpaceBtreeIndex to false.
@changelog_1174_li
@changelog_1177_li
Identifiers with a digit and then a dollar sign didn't work. Example: A1$B.
@changelog_1175_li
@changelog_1178_li
MS SQL Server compatibility: support for linked tables with NVARCHAR, NCHAR, NCLOB, and LONGNVARCHAR.
@changelog_1176_li
@changelog_1179_li
Android: workaround for a problem when using read-only databases in zip files (skip seems to be implemented incorrectly on the Android system).
@changelog_1177_li
@changelog_1180_li
Calling execute() or prepareStatement() with null as the SQL statement now throws an exception.
@changelog_1178_li
@changelog_1181_li
Benchmark: the number of executed statements was incorrect. The H2 database was loaded at the beginning of the test to collect results, now it is loaded at the very end. Thanks to Fred Toussi from HSQLDB for reporting those problems. However the changed do not affect the relative performance.
@changelog_1179_li
@changelog_1182_li
H2 Console: command line settings are no longer stored in the properties file. They are now only used for the current process, except if they are explicitly saved.
@changelog_1180_li
@changelog_1183_li
Cache: support for a second level soft-references cache. To enable it, append ;CACHE_TYPE=SOFT_LRU (or SOFT_TQ) to the database URL, or set the system property h2.cacheTypeDefault to "SOFT_LRU" / "SOFT_TQ". Enabling the second level cache reduces performance for small databases, but speeds up large databases. It makes sense to use it if the available memory size is unknown. Thanks a lot to Jan Kotek!
@changelog_1181_h2
@changelog_1184_h2
Version 1.1.112 (2009-05-01)
@changelog_1182_li
@changelog_1185_li
JdbcPreparedStatement.toString() could throw a NullPointerException.
@changelog_1183_li
@changelog_1186_li
EclipseLink: added H2Platform.supportsIdentity().
@changelog_1184_li
@changelog_1187_li
Connection pool: the default login timeout is now 5 minutes.
@changelog_1185_li
@changelog_1188_li
After truncating tables, opening large databases could become slow because indexes were always re-built unnecessarily when opening.
@changelog_1186_li
@changelog_1189_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_1187_li
@changelog_1190_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_1188_li
@changelog_1191_li
Improved error message when the .lock.db file modification time is in the future.
@changelog_1189_li
@changelog_1192_li
The MERGE statement now returns 0 as the generated key if the row was updated.
@changelog_1190_li
@changelog_1193_li
Running code coverage is now automated.
@changelog_1191_li
@changelog_1194_li
A file system implementation can now be registered using FileSystem.register.
@changelog_1192_li
@changelog_1195_li
The database file system is no longer included in the jar file, it moved to the test section.
@changelog_1193_h2
@changelog_1196_h2
Version 1.1.111 (2009-04-10)
@changelog_1194_li
@changelog_1197_li
In-memory databases can now run inside the Google App Engine.
@changelog_1195_li
@changelog_1198_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_1196_li
@changelog_1199_li
The wrong exception was thrown when using unquoted text for the SQL statements COMMENT, ALTER USER, and SET PASSWORD.
@changelog_1197_li
@changelog_1200_li
The built-in connection pool did not roll back transactions and enable autocommit enabled after closing a connection.
@changelog_1198_li
@changelog_1201_li
Sometimes a StackOverflow occurred when checking for deadlock. See also http://code.google.com/p/h2database/issues/detail?id=61
@changelog_1199_li
@changelog_1202_li
The Shell tool no longer truncates results with only one column, and displays a message if data was truncated.
@changelog_1200_h2
@changelog_1203_h2
Version 1.1.110 (2009-04-03)
@changelog_1201_li
@changelog_1204_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_1202_li
@changelog_1205_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_1203_li
@changelog_1206_li
The data type of a SUBSTRING method was wrong.
@changelog_1204_li
@changelog_1207_li
ResultSet.findColumn and get methods with column label parameters now also check for matching column names (like most databases except MySQL).
@changelog_1205_li
@changelog_1208_li
H2 Console: the browser system property now supports a list of arguments. Example: java -Dh2.browser="open,-a,Safari,%url" ...
@changelog_1206_li
@changelog_1209_li
Improved Javadoc navigation (similar to Scaladoc).
@changelog_1207_li
@changelog_1210_li
H2 Console: auto-complete of identifiers did not work correctly for H2 databases in MySQL mode.
@changelog_1208_li
@changelog_1211_li
DISTINCT and GROUP BY on a CLOB column was broken.
@changelog_1209_li
@changelog_1212_li
The FTP server moved to the tools section and is no longer included in the h2*.jar file.
@changelog_1210_li
@changelog_1213_li
Improved error message for unsupported features: now the message says what exactly is not supported.
@changelog_1211_li
@changelog_1214_li
Improved OSGi support.
@changelog_1212_li
@changelog_1215_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_1213_li
@changelog_1216_li
The API of the tools changed a bit (each tool now returns an exit code).
@changelog_1214_li
@changelog_1217_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_1215_li
@changelog_1218_li
CREATE TABLE: improved compatibility (support for UNIQUE NOT NULL).
@changelog_1216_li
@changelog_1219_li
DatabaseMetaData.getSQLKeywords now returns the correct list.
@changelog_1217_li
@changelog_1220_li
Deterministic user defined functions did not work when the parameter was a column. Fixed.
@changelog_1218_li
@changelog_1221_li
JdbcConnectionPool.setLoginTimeout with 0 now uses the default timeout.
@changelog_1219_li
@changelog_1222_li
Creating a JdbcConnectionPool has been simplified a bit.
@changelog_1220_li
@changelog_1223_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_1221_li
@changelog_1224_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_1222_li
@changelog_1225_li
Linked tables to SQLite database can now be created.
@changelog_1223_li
@changelog_1226_li
Nested IN(IN(...)) didn't work.
@changelog_1224_li
@changelog_1227_li
NIO storage: the nio: prefix was using memory mapped files instead of FileChannel.
@changelog_1225_h2
@changelog_1228_h2
Version 1.1.109 (2009-03-14)
@changelog_1226_li
@changelog_1229_li
The optimization for IN(...) is now only used if comparing a column with an index.
@changelog_1227_li
@changelog_1230_li
User defined functions can now be deterministic (see CREATE ALIAS documentation).
@changelog_1228_li
@changelog_1231_li
Multiple nested queries in the FROM clause with parameters did not always work.
@changelog_1229_li
@changelog_1232_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_1230_li
@changelog_1233_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_1231_li
@changelog_1234_li
The functions BITOR, BITAND, BITXOR, and MOD now accept and return BIGINT instead of INT.
@changelog_1232_li
@changelog_1235_li
Could not use the same linked table multiple times in the same query.
@changelog_1233_li
@changelog_1236_li
Bugs in the server-less multi-connection mode have been fixed.
@changelog_1234_li
@changelog_1237_li
Column names could not be named "UNIQUE" (with the quotes).
@changelog_1235_li
@changelog_1238_li
New system function TRANSACTION_ID() to get the current transaction identifier for a session.
@changelog_1236_h2
@changelog_1239_h2
Version 1.1.108 (2009-02-28)
@changelog_1237_li
@changelog_1240_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_1238_li
@changelog_1241_li
JdbcConnectionPool: it was possible to set a negative connection pool size.
@changelog_1239_li
@changelog_1242_li
Fulltext search did not support table names with a backslash.
@changelog_1240_li
@changelog_1243_li
The internal IntArray class did not work correctly when initialized with a zero length array.
@changelog_1241_li
@changelog_1244_li
The H2 Console web application (war file) did only support ASCII characters. Now UTF-8 is supported.
@changelog_1242_li
@changelog_1245_li
DATEADD does no longer require that the argument is a timestamp.
@changelog_1243_li
@changelog_1246_li
The database file locking mechanism didn't work correctly on Mac OS.
@changelog_1244_li
@changelog_1247_li
Some built-in functions reported the wrong precision, scale, and display size.
@changelog_1245_li
@changelog_1248_li
MySQL compatibility for CREATE TABLE is improved (UNSIGNED, KEY).
@changelog_1246_li
@changelog_1249_li
Recovery did not work if there were more than 255 lobs stored as files.
@changelog_1247_li
@changelog_1250_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_1248_li
@changelog_1251_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_1249_li
@changelog_1252_li
The WebServlet did not close the database when un-deploying the web application.
@changelog_1250_li
@changelog_1253_li
The exception message of failed INSERT or MERGE statements now includes all values and the row number.
@changelog_1251_li
@changelog_1254_li
If opening a database failed with an out of memory exception, some files were not closed.
@changelog_1252_li
@changelog_1255_li
Optimizer: the expected runtime calculation was incorrect. The fixed calculation should give slightly better query plans when using many joins.
@changelog_1253_li
@changelog_1256_li
Improved exception message when connecting to a just started server fails.
@changelog_1254_li
@changelog_1257_li
Connection.isValid is a bit faster.
@changelog_1255_li
@changelog_1258_li
H2 Console: the autocomplete feature has been improved a bit. It can now better parse conditions.
@changelog_1256_li
@changelog_1259_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_1257_h2
@changelog_1260_h2
Version 1.1.107 (2009-01-24)
@changelog_1258_li
@changelog_1261_li
Some DatabaseMetaData operations did not work for non-admin users for versions 1.1.x.
@changelog_1259_li
@changelog_1262_li
The MySQL compatibility extension fromUnixTime now used the English locale.
@changelog_1260_li
@changelog_1263_li
When using LOG=2 and repeatedly updating the last row rows of a table, the index file grew quickly.
@changelog_1261_li
@changelog_1264_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_1262_li
@changelog_1265_li
Enabling the trace mechanism by creating a specially named file is no longer supported.
@changelog_1263_h2
@changelog_1266_h2
Version 1.1.106 (2009-01-04)
@changelog_1264_li
@changelog_1267_li
Statement.setQueryTimeout did not work correctly for some statements.
@changelog_1265_li
@changelog_1268_li
CREATE DOMAIN: built-in data types can now only be changed if no tables exist.
@changelog_1266_li
@changelog_1269_li
Linked tables: a workaround for Oracle DATE columns has been implemented.
@changelog_1267_li
@changelog_1270_li
DatabaseMetaData.getPrimaryKeys: the column PK_NAME now contains the constraint name instead of the index name (compatibility for PostgreSQL and Derby).
@changelog_1268_li
@changelog_1271_li
Using IN(..) inside a IN(SELECT..) did not always work.
@changelog_1269_li
@changelog_1272_li
Views with IN(..) that used a view itself did not work.
@changelog_1270_li
@changelog_1273_li
Union queries with LIMIT or ORDER BY that are used in a view or subquery did not work.
@changelog_1271_li
@changelog_1274_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_1272_li
@changelog_1275_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_1273_li
@changelog_1276_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_1274_h2
@changelog_1277_h2
Version 1.1.105 (2008-12-19)
@changelog_1275_li
@changelog_1278_li
The setting STORAGE=TEXT is no longer supported.
@changelog_1276_li
@changelog_1279_li
Deleting a database using the tool DeleteDbFiles deleted LOB files of other databases in the same directory.
@changelog_1277_li
@changelog_1280_li
When used in a subquery, LIKE and IN(..) did not work correctly sometimes.
@changelog_1278_li
@changelog_1281_li
The fulltext search documentation has been improved.
@changelog_1279_li
@changelog_1282_li
ARRAY_GET returned the wrong data type (ARRAY). Now it returns VARCHAR.
@changelog_1280_li
@changelog_1283_li
Natural join: the joined columns are not repeated any more when using SELECT *.
@changelog_1281_li
@changelog_1284_li
User defined aggregate functions: the method getType expected internal data types instead of SQL types.
@changelog_1282_li
@changelog_1285_li
User defined aggregate functions did not work if there was no group by expression.
@changelog_1283_li
@changelog_1286_li
MySQL compatibility: support for := assignment as in @sum:=@sum+x
@changelog_1284_li
@changelog_1287_li
INSERT INTO TEST(SELECT * FROM TEST) is now supported.
@changelog_1285_li
@changelog_1288_li
Each session threw an invisible exception when garbage collected.
@changelog_1286_li
@changelog_1289_li
Foreign key constraints that refer to a quoted column did not work.
@changelog_1287_li
@changelog_1290_li
New meta data column INFORMATION_SCHEMA.TABLES.LAST_MODIFICATION to get the table modification counter.
@changelog_1288_li
@changelog_1291_li
Shell: line comments didn't work correctly.
@changelog_1289_li
@changelog_1292_li
H2 Console: columns are now listed for up to 500 tables instead of 100.
@changelog_1290_li
@changelog_1293_li
H2 Console: Cmd+Enter executes the current statement, Alt+Space for autocomplete.
@changelog_1291_li
@changelog_1294_li
JaQu: the maximum length of a column can now be defined using maxLength. For an example, see Product.java (maxLength(category, 255)).
@changelog_1292_li
@changelog_1295_li
Rıdvan Ağar has completed the Turkish translation of the H2 Console. Thanks a lot!
@changelog_1293_h2
@changelog_1296_h2
Version 1.1.104 (2008-11-28)
@changelog_1294_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_1295_li
JaQu: tables are now auto-created when running a query.
@changelog_1296_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_1297_li
The function SUM could overflow when using large values. It returns now a data type that is safe.
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_1298_li
The function AVG could overflow when using large values. Fixed.
JaQu: tables are now auto-created when running a query.
@changelog_1299_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.
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_1300_li
Build: JAVA_HOME is now automatically detected on Mac OS X.
The function SUM could overflow when using large values. It returns now a data type that is safe.
@changelog_1301_li
Testing for local connections was very slow on some systems.
The function AVG could overflow when using large values. Fixed.
@changelog_1302_li
The cache memory usage calculation is more conservative.
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_1303_li
Allocating space got slower and slower the larger the database.
Build: JAVA_HOME is now automatically detected on Mac OS X.
@changelog_1304_li
ALTER TABLE ALTER COLUMN could throw the wrong exception in the last version (Table not found).
Testing for local connections was very slow on some systems.
@changelog_1305_li
Updatable result sets: the key columns can now be updated.
The cache memory usage calculation is more conservative.
@changelog_1306_li
The H2DatabaseProvider for ActiveObjects is now included in the tools section.
Allocating space got slower and slower the larger the database.
@changelog_1307_li
The H2Platform for Oracle Toplink Essential has been improved a bit.
ALTER TABLE ALTER COLUMN could throw the wrong exception in the last version (Table not found).
@changelog_1308_li
The Windows service to start H2 didn't work in version 1.1.
Updatable result sets: the key columns can now be updated.
@changelog_1309_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).
The H2DatabaseProvider for ActiveObjects is now included in the tools section.
@changelog_1310_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.
The H2Platform for Oracle Toplink Essential has been improved a bit.
@changelog_1311_li
Compatibility for MS SQL Server DATEDIFF(YYYY, .., ..)
The Windows service to start H2 didn't work in version 1.1.
@changelog_1312_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).
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_1313_li
The interface CloseListener has a new method 'remove' that is called when the trigger is dropped.
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_1314_li
Fulltext search: there was a memory leak when creating and dropping fulltext indexes in a loop.
Compatibility for MS SQL Server DATEDIFF(YYYY, .., ..)
@changelog_1315_h2
Version 1.1.103 (2008-11-07)
@changelog_1315_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_1316_li
Could not order by a formula when the formula was in the group by list but not in the select list.
The interface CloseListener has a new method 'remove' that is called when the trigger is dropped.
@changelog_1317_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_1318_li
ALTER TABLE used a lot of memory when using multi-version concurrency.
@changelog_1319_li
Referential integrity for in-memory databases didn't work in some cases in version 1.1.102.
@changelog_1320_li
New column INFORMATION_SCHEMA.COLUMNS.SEQUENCE_NAME to get the name of the sequence for auto-increment columns.
@changelog_1321_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_1322_li
The Japanese translation has been completed by Masahiro Ikemoto. Thanks a lot!
@changelog_1323_li
Improved PostgreSQL compatibility for NEXTVAL and CURRVAL.
@changelog_1324_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_1325_li
New system property h2.browser to set the browser to use.
@changelog_1326_li
To start the browser, java.awt.Desktop.browse is now used if available.
Fulltext search: there was a memory leak when creating and dropping fulltext indexes in a loop.
To start the <a href="quickstart.html#h2_console">H2 Console tool</a>, double click the jar file, or run <code>java -jar h2*.jar</code>, <code>h2.bat</code>, or <code>h2.sh</code>.
...
...
@@ -2447,7 +2441,7 @@ database.H2Platform
Downloads
@download_1001_h3
Version 1.2.123 (2009-11-08, Beta)
Version 1.2.124 (2009-11-20, Beta)
@download_1002_a
Windows Installer
...
...
@@ -6284,7 +6278,7 @@ Small footprint: around 1 MB jar file size
Download Beta
@mainWeb_1007_td
Version 1.2.123 (2009-11-08):
Version 1.2.124 (2009-11-20):
@mainWeb_1008_a
Windows Installer (4 MB)
...
...
@@ -8024,7 +8018,7 @@ Priority 1
Bugfixes
@roadmap_1008_li
Support large updates (use the transaction log for rollback instead of persistent UndoLog.file).
Support large updates (use the transaction log for rollback).
@roadmap_1009_li
More tests with MULTI_THREADED=1
...
...
@@ -8153,256 +8147,256 @@ CHECK: find out what makes CHECK=TRUE slow, move to CHECK2
Index usage for (ID, NAME)=(1, 'Hi'); document
@roadmap_1051_li
Make DDL (Data Definition) operations transactional
Clustering: reads should be randomly distributed (optional) or to a designated database on RAM
@roadmap_1052_li
RANK() and DENSE_RANK(), Partition using OVER()
Make DDL (Data Definition) operations transactional
@roadmap_1053_li
Set a connection read only (Connection.setReadOnly) or using a connection parameter
RANK() and DENSE_RANK(), Partition using OVER()
@roadmap_1054_li
Optimizer: use an index for IS NULL and IS NOT NULL (including linked tables). ID IS NOT NULL could be converted to ID >= Integer.MIN_VALUE.
Set a connection read only (Connection.setReadOnly) or using a connection parameter
@roadmap_1055_li
Suggestion: include Jetty as Servlet Container (like LAMP)
Optimizer: use an index for IS NULL and IS NOT NULL (including linked tables). ID IS NOT NULL could be converted to ID >= Integer.MIN_VALUE.
@roadmap_1056_li
Trace shipping to server
Suggestion: include Jetty as Servlet Container (like LAMP)
@roadmap_1057_li
Version check: docs / web console (using Javascript), and maybe in the library (using TCP/IP)
Trace shipping to server
@roadmap_1058_li
Web server classloader: override findResource / getResourceFrom
Version check: docs / web console (using Javascript), and maybe in the library (using TCP/IP)
@roadmap_1059_li
Cost for embedded temporary view is calculated wrong, if result is constant
Web server classloader: override findResource / getResourceFrom
@roadmap_1060_li
Comparison: pluggable sort order: natural sort
Cost for embedded temporary view is calculated wrong, if result is constant
@roadmap_1061_li
Count index range query (count(*) where id between 10 and 20)
Comparison: pluggable sort order: natural sort
@roadmap_1062_li
Recursive Queries (see details)
Count index range query (count(*) where id between 10 and 20)
@roadmap_1063_li
Eclipse plugin
Performance: update in-place
@roadmap_1064_li
Asynchronous queries to support publish/subscribe: SELECT ... FOR READ WAIT [maxMillisToWait]
Implement missing JDBC API (CallableStatement,...)
Linked schema using CSV files: one schema for a directory of files; support indexes for CSV files
@roadmap_1070_li
Compression of the cache
iReport to support H2
@roadmap_1071_li
Include SMPT (mail) server (at least client) (alert on cluster failure, low disk space,...)
Implement missing JDBC API (CallableStatement,...)
@roadmap_1072_li
Drop with restrict (currently cascade is the default)
Compression of the cache
@roadmap_1073_li
JSON parser and functions
Include SMPT (mail) server (at least client) (alert on cluster failure, low disk space,...)
@roadmap_1074_li
Server: client ping from time to time (to avoid timeout - is timeout a problem?)
Drop with restrict (currently cascade is the default)
@roadmap_1075_li
Copy database: tool with config GUI and batch mode, extensible (example: compare)
JSON parser and functions
@roadmap_1076_li
Document, implement tool for long running transactions using user-defined compensation statements.
Server: client ping from time to time (to avoid timeout - is timeout a problem?)
@roadmap_1077_li
Support SET TABLE DUAL READONLY
Copy database: tool with config GUI and batch mode, extensible (example: compare)
@roadmap_1078_li
GCJ: what is the state now?
Document, implement tool for long running transactions using user-defined compensation statements.
@roadmap_1079_li
Events for: database Startup, Connections, Login attempts, Disconnections, Prepare (after parsing), Web Server (see http://docs.openlinksw.com/virtuoso/fn_dbev_startup.html)
Support SET TABLE DUAL READONLY
@roadmap_1080_li
Optimization: log compression
GCJ: what is the state now?
@roadmap_1081_li
ROW_NUMBER() OVER([ORDER BY columnName])
Events for: database Startup, Connections, Login attempts, Disconnections, Prepare (after parsing), Web Server (see http://docs.openlinksw.com/virtuoso/fn_dbev_startup.html)
@roadmap_1082_li
Support standard INFORMATION_SCHEMA tables, as defined in http://www.contrib.andrew.cmu.edu/~shadow/sql/sql1992.txt; specially KEY_COLUMN_USAGE (http://dev.mysql.com/doc/refman/5.0/en/information-schema.html, http://www.xcdsql.org/Misc/INFORMATION_SCHEMA%20With%20Rolenames.gif)
Optimization: log compression
@roadmap_1083_li
Compatibility: in MySQL, HSQLDB, /0.0 is NULL; in PostgreSQL, Derby: division by zero
ROW_NUMBER() OVER([ORDER BY columnName])
@roadmap_1084_li
Functional tables should accept parameters from other tables (see FunctionMultiReturn) SELECT * FROM TEST T, P2C(T.A, T.R)
Support standard INFORMATION_SCHEMA tables, as defined in http://www.contrib.andrew.cmu.edu/~shadow/sql/sql1992.txt; specially KEY_COLUMN_USAGE (http://dev.mysql.com/doc/refman/5.0/en/information-schema.html, http://www.xcdsql.org/Misc/INFORMATION_SCHEMA%20With%20Rolenames.gif)
@roadmap_1085_li
Custom class loader to reload functions on demand
Compatibility: in MySQL, HSQLDB, /0.0 is NULL; in PostgreSQL, Derby: division by zero
@roadmap_1086_li
Test http://mysql-je.sourceforge.net/
Functional tables should accept parameters from other tables (see FunctionMultiReturn) SELECT * FROM TEST T, P2C(T.A, T.R)
@roadmap_1087_li
Close all files when closing the database (including LOB files that are open on the client side)
Custom class loader to reload functions on demand
@roadmap_1088_li
EXE file: maybe use http://jsmooth.sourceforge.net
Test http://mysql-je.sourceforge.net/
@roadmap_1089_li
Performance: automatically build in-memory indexes if the whole table is in memory
Close all files when closing the database (including LOB files that are open on the client side)
@roadmap_1090_li
H2 Console: the webclient could support more features like phpMyAdmin.
EXE file: maybe use http://jsmooth.sourceforge.net
@roadmap_1091_li
Use Janino to convert Java to C++
Performance: automatically build in-memory indexes if the whole table is in memory
@roadmap_1092_li
The HELP information schema can be directly exposed in the Console
H2 Console: the webclient could support more features like phpMyAdmin.
@roadmap_1093_li
Maybe use the 0x1234 notation for binary fields, see MS SQL Server
Use Janino to convert Java to C++
@roadmap_1094_li
Support Oracle CONNECT BY in some way: http://www.adp-gmbh.ch/ora/sql/connect_by.html, http://philip.greenspun.com/sql/trees.html
The HELP information schema can be directly exposed in the Console
@roadmap_1095_li
SQL Server 2005, Oracle: support COUNT(*) OVER(). See http://www.orafusion.com/art_anlytc.htm
Maybe use the 0x1234 notation for binary fields, see MS SQL Server
Test and document UPDATE TEST SET (ID, NAME) = (SELECT ID*10, NAME || '!' FROM TEST T WHERE T.ID=TEST.ID);
Version column (number/sequence and timestamp based)
@roadmap_1100_li
Max memory rows / max undo log size: use block count / row size not row count
Optimize getGeneratedKey: send last identity after each execute (server).
@roadmap_1101_li
Support 123L syntax as in Java; example: SELECT (2000000000*2)
Test and document UPDATE TEST SET (ID, NAME) = (SELECT ID*10, NAME || '!' FROM TEST T WHERE T.ID=TEST.ID);
@roadmap_1102_li
Implement point-in-time recovery
Max memory rows / max undo log size: use block count / row size not row count
@roadmap_1103_li
LIKE: improved version for larger texts (currently using naive search)
Support 123L syntax as in Java; example: SELECT (2000000000*2)
@roadmap_1104_li
Automatically convert to the next 'higher' data type whenever there is an overflow.
Implement point-in-time recovery
@roadmap_1105_li
Throw an exception when the application calls getInt on a Long (optional)
LIKE: improved version for larger texts (currently using naive search)
@roadmap_1106_li
Default date format for input and output (local date constants)
Automatically convert to the next 'higher' data type whenever there is an overflow.
@roadmap_1107_li
Support custom Collators
Throw an exception when the application calls getInt on a Long (optional)
@roadmap_1108_li
Document ROWNUM usage for reports: SELECT ROWNUM, * FROM (subquery)
Default date format for input and output (local date constants)
@roadmap_1109_li
Clustering: reads should be randomly distributed or to a designated database on RAM
Support custom Collators
@roadmap_1110_li
Clustering: when a database is back alive, automatically synchronize with the master
Document ROWNUM usage for reports: SELECT ROWNUM, * FROM (subquery)
@roadmap_1111_li
File system that writes to two file systems (replication, replicating file system)
Clustering: when a database is back alive, automatically synchronize with the master
@roadmap_1112_li
Standalone tool to get relevant system properties and add it to the trace output.
File system that writes to two file systems (replication, replicating file system)
@roadmap_1113_li
Support 'call proc(1=value)' (PostgreSQL, Oracle)
Standalone tool to get relevant system properties and add it to the trace output.
@roadmap_1114_li
JAMon (proxy jdbc driver)
Support 'call proc(1=value)' (PostgreSQL, Oracle)
@roadmap_1115_li
Console: improve editing data (Tab, Shift-Tab, Enter, Up, Down, Shift+Del?)
JAMon (proxy jdbc driver)
@roadmap_1116_li
Console: autocomplete Ctrl+Space inserts template
Console: improve editing data (Tab, Shift-Tab, Enter, Up, Down, Shift+Del?)
@roadmap_1117_li
Option to encrypt .trace.db file
Console: autocomplete Ctrl+Space inserts template
@roadmap_1118_li
Write Behind Cache on SATA leads to data corruption See also http://sr5tech.com/write_back_cache_experiments.htm and http://www.jasonbrome.com/blog/archives/2004/04/03/writecache_enabled.html
Option to encrypt .trace.db file
@roadmap_1119_li
Functions with unknown return or parameter data types: serialize / deserialize
Write Behind Cache on SATA leads to data corruption See also http://sr5tech.com/write_back_cache_experiments.htm and http://www.jasonbrome.com/blog/archives/2004/04/03/writecache_enabled.html
@roadmap_1120_li
Test if idle TCP connections are closed, and how to disable that
Functions with unknown return or parameter data types: serialize / deserialize
@roadmap_1121_li
Try using a factory for Row, Value[] (faster?), http://javolution.org/, alternative ObjectArray / IntArray
Test if idle TCP connections are closed, and how to disable that
@roadmap_1122_li
Auto-Update feature for database, .jar file
Try using a factory for Row, Value[] (faster?), http://javolution.org/, alternative ObjectArray / IntArray
@roadmap_1123_li
ResultSet SimpleResultSet.readFromURL(String url): id varchar, state varchar, released timestamp
Auto-Update feature for database, .jar file
@roadmap_1124_li
Partial indexing (see PostgreSQL)
ResultSet SimpleResultSet.readFromURL(String url): id varchar, state varchar, released timestamp
@roadmap_1125_li
Add GUI to build a custom version (embedded, fulltext,...) using build flags
Partial indexing (see PostgreSQL)
@roadmap_1126_li
http://rubyforge.org/projects/hypersonic/
Add GUI to build a custom version (embedded, fulltext,...) using build flags
@roadmap_1127_li
Add comparator (x === y) : (x = y or (x is null and y is null))
http://rubyforge.org/projects/hypersonic/
@roadmap_1128_li
Try to create trace file even for read only databases
Add comparator (x === y) : (x = y or (x is null and y is null))
@roadmap_1129_li
Add a sample application that runs the H2 unit test and writes the result to a file (so it can be included in the user app)
Try to create trace file even for read only databases
@roadmap_1130_li
Count on a column that can not be null could be optimized to COUNT(*)
Add a sample application that runs the H2 unit test and writes the result to a file (so it can be included in the user app)
@roadmap_1131_li
Table order: ALTER TABLE TEST ORDER BY NAME DESC (MySQL compatibility)
Count on a column that can not be null could be optimized to COUNT(*)
@roadmap_1132_li
Backup tool should work with other databases as well
Table order: ALTER TABLE TEST ORDER BY NAME DESC (MySQL compatibility)
@roadmap_1133_li
Console: -ifExists doesn't work for the console. Add a flag to disable other dbs
Backup tool should work with other databases as well
@roadmap_1134_li
Performance: update in-place
Console: -ifExists doesn't work for the console. Add a flag to disable other dbs
@roadmap_1135_li
Check if 'FSUTIL behavior set disablelastaccess 1' improves the performance (fsutil behavior query disablelastaccess)
...
...
@@ -8993,82 +8987,82 @@ Allow calling function with no parameters without parenthesis. See http://code.g
CSV: currently # is a line comment and can start at any field. Make it optional.
@roadmap_1331_li
Add database creation date and time to the database.
Finer granularity for SLF4J trace - See http://code.google.com/p/h2database/issues/detail?id=62
@roadmap_1332_li
Support ASSERTIONS.
Add database creation date and time to the database.
@roadmap_1333_li
Support multi-threaded kernel with multi-version concurrency.
Support ASSERTIONS.
@roadmap_1334_li
MySQL compatibility: support comparing 1='a'
Support multi-threaded kernel with multi-version concurrency.
@roadmap_1335_li
Support PostgreSQL lock modes: http://www.postgresql.org/docs/8.3/static/explicit-locking.html
MySQL compatibility: support comparing 1='a'
@roadmap_1336_li
PostgreSQL compatibility: test DbVisualizer and Squirrel SQL using a new PostgreSQL JDBC driver.
Support PostgreSQL lock modes: http://www.postgresql.org/docs/8.3/static/explicit-locking.html
@roadmap_1337_li
RunScript should be able to read from system in (or quite mode for Shell).
PostgreSQL compatibility: test DbVisualizer and Squirrel SQL using a new PostgreSQL JDBC driver.
@roadmap_1338_li
Natural join: support select x from dual natural join dual.
RunScript should be able to read from system in (or quite mode for Shell).
@roadmap_1339_li
Natural join: somehow support this: select a.x, b.x, x from dual a natural join dual b
Natural join: support select x from dual natural join dual.
@roadmap_1340_li
MySQL compatibility: for auto_increment columns, convert 0 to next value (as when inserting NULL).
Natural join: somehow support this: select a.x, b.x, x from dual a natural join dual b
@roadmap_1341_li
Optimization for multi-column IN: use an index if possible. Example: (A, B) IN((1, 2), (2, 3)).
MySQL compatibility: for auto_increment columns, convert 0 to next value (as when inserting NULL).
@roadmap_1342_li
Optimization for EXISTS: convert to inner join or IN(..) if possible.
Optimization for multi-column IN: use an index if possible. Example: (A, B) IN((1, 2), (2, 3)).
@roadmap_1343_li
Functions: support hashcode(value); cryptographic and fast
Optimization for EXISTS: convert to inner join or IN(..) if possible.
@roadmap_1344_li
Serialized file lock: support long running queries.
Functions: support hashcode(value); cryptographic and fast
@roadmap_1345_li
Network: use 127.0.0.1 if other addresses don't work.
Serialized file lock: support long running queries.
@roadmap_1346_li
Pluggable network protocol (currently Socket/ServerSocket over TCP/IP) - see also TransportServer with master slave replication.
Network: use 127.0.0.1 if other addresses don't work.
@roadmap_1347_li
Select for update in mvcc mode: only lock the selected records.
Pluggable network protocol (currently Socket/ServerSocket over TCP/IP) - see also TransportServer with master slave replication.
@roadmap_1348_li
Support reading JCR data: one table per node type; query table; cache option
Select for update in mvcc mode: only lock the selected records.
@roadmap_1349_li
OSGi: create a sample application, test, document.
Support reading JCR data: one table per node type; query table; cache option
@roadmap_1350_li
help.csv: use complete examples for functions; run as test case.
OSGi: create a sample application, test, document.
@roadmap_1351_li
Functions to calculate the memory and disk space usage of a table, a row, or a value.
help.csv: use complete examples for functions; run as test case.
@roadmap_1352_li
Re-implement PooledConnection; use a lightweight connection object.
Functions to calculate the memory and disk space usage of a table, a row, or a value.
@roadmap_1353_li
Doclet: convert tests in javadocs to a java class.
Re-implement PooledConnection; use a lightweight connection object.
@roadmap_1354_li
Doclet: format fields like methods, but support sorting by name and value.
Doclet: convert tests in javadocs to a java class.
@roadmap_1355_li
Doclet: shrink the html files.
Doclet: format fields like methods, but support sorting by name and value.
@roadmap_1356_li
Finer granularity for SLF4J trace - See http://code.google.com/p/h2database/issues/detail?id=62
Doclet: shrink the html files.
@roadmap_1357_li
MySQL compatibility: support REPLACE - See http://code.google.com/p/h2database/issues/detail?id=73
...
...
@@ -9292,13 +9286,16 @@ Recover tool: stream blob / clob data (problem: currently using varchar data typ
@roadmap_1430_li
Move away from system properties where possible.
@roadmap_1431_h2
@roadmap_1431_li
Database file lock: detect hibernate / standby / very slow threads (compare system time).
@roadmap_1432_h2
Not Planned
@roadmap_1432_li
@roadmap_1433_li
HSQLDB (did) support this: select id i from test where i<0 (other databases don't). Supporting it may break compatibility.
@roadmap_1433_li
@roadmap_1434_li
String.intern (so that Strings can be compared with ==) will not be used because some VMs have problems when used extensively.
# You need to install a JDK, for example the Sun JDK version 1.5 or 1.6. Ensure that Java binary directory is included in the <code>PATH</code> environment variable, and that the environment variable <code>JAVA_HOME</code> points to your Java installation. On the command line, go to the directory <code>h2</code> and execute the following command:
@build_1027_p
@build_1028_p
# For Linux and OS X, use <code>./build.sh</code> instead of <code>build</code>.
@build_1028_p
@build_1029_p
# You will get a list of targets. If you want to build the <code>jar</code> file, execute (Windows):
@build_1029_h3
@build_1030_h3
#Switching the Source Code
@build_1030_p
@build_1031_p
# By default the source code uses Java 1.5 features, however Java 1.6 is supported as well. To switch the source code to the installed version of Java, run:
@build_1031_h2
@build_1032_h2
#Build Targets
@build_1032_p
@build_1033_p
# The build system can generate smaller jar files as well. The following targets are currently supported:
@build_1033_code
@build_1034_code
#jarClient
@build_1034_li
@build_1035_li
# creates the file <code>h2client.jar</code>. This only contains the JDBC client.
@build_1035_code
@build_1036_code
#jarSmall
@build_1036_li
@build_1037_li
# creates the file <code>h2small.jar</code>. This only contains the embedded database. Debug information is disabled.
@build_1037_code
@build_1038_code
#jarJaqu
@build_1038_li
@build_1039_li
# creates the file <code>h2jaqu.jar</code>. This only contains the JaQu (Java Query) implementation. All other jar files do not include JaQu.
@build_1039_code
@build_1040_code
#javadocImpl
@build_1040_li
@build_1041_li
# creates the Javadocs of the implementation.
@build_1041_p
@build_1042_p
# To create the file <code>h2client.jar</code>, go to the directory <code>h2</code> and execute the following command:
@build_1042_h2
@build_1043_h2
Maven 2 の利用
@build_1043_h3
@build_1044_h3
Centralリポジトリの利用
@build_1044_p
@build_1045_p
# You can include the database in your Maven 2 project as a dependency. Example:
@build_1045_p
@build_1046_p
# New versions of this database are first uploaded to http://hsql.sourceforge.net/m2-repo/ and then automatically synchronized with the main Maven repository; however after a new release it may take a few hours before they are available there.
@build_1046_h3
@build_1047_h3
スナップショットバージョンの利用
@build_1047_p
@build_1048_p
# To build a <code>h2-*-SNAPSHOT.jar</code> file and upload it the to the local Maven 2 repository, execute the following command:
@build_1048_p
@build_1049_p
# Afterwards, you can include the database in your Maven 2 project as a dependency:
@build_1049_h2
@build_1050_h2
#Translating
@build_1050_p
@build_1051_p
# The translation of this software is split into the following parts:
# To translate the H2 Console, start it and select Preferences / Translate. The conversion between UTF-8 and Java encoding (using the <code>\u</code> syntax), as well as the HTML entities (<code>&#..;</code>) is automated by running the tool <code>PropertiesToUTF8</code>. The web site translation is automated as well, using <code>build docs</code>.
@build_1055_h2
@build_1056_h2
#Providing Patches
@build_1056_p
@build_1057_p
# If you like to provide patches, please consider the following guidelines to simplify merging them:
@build_1057_li
@build_1058_li
#Only use Java 1.5 features (do not use Java 1.6) (see <a href="#environment">Environment</a>).
@build_1058_li
@build_1059_li
#Follow the coding style used in the project, and use Checkstyle (see above) to verify. For example, do not use tabs (use spaces instead). The checkstyle configuration is in <code>src/installer/checkstyle.xml</code>.
@build_1059_li
@build_1060_li
#Please provide test cases and integrate them into the test suite. For Java level tests, see <code>src/test/org/h2/test/TestAll.java</code>. For SQL level tests, see <code>src/test/org/h2/test/test.in.txt</code> or <code>testSimple.in.txt</code>.
@build_1060_li
@build_1061_li
#The test cases should cover at least 90% of the changed and new code; use a code coverage tool to verify that (see above). or use the build target <code>coverage</code>.
@build_1061_li
@build_1062_li
#Verify that you did not break other features: run the test cases by executing <code>build test</code>.
@build_1062_li
@build_1063_li
#Provide end user documentation if required (<code>src/docsrc/html/*</code>).
@build_1063_li
@build_1064_li
#Document grammar changes in <code>src/docsrc/help/help.csv</code>
@build_1064_li
@build_1065_li
#Provide a change log entry (<code>src/docsrc/html/changelog.html</code>).
@build_1065_li
@build_1066_li
#Verify the spelling using <code>build spellcheck</code>. If required add the new words to <code>src/tools/org/h2/build/doc/dictionary.txt</code>.
@build_1066_li
@build_1067_li
#Run <code>src/installer/buildRelease</code> to find and fix formatting errors.
@build_1067_li
@build_1068_li
#Verify the formatting using <code>build docs</code> and <code>build javadoc</code>.
@build_1068_li
@build_1069_li
#Submit patches as <code>.patch</code> files (compressed if big). To create a patch using Eclipse, use Team / Create Patch.
@build_1069_p
@build_1070_p
# For legal reasons, patches need to be public in the form of an email to the <a href="http://groups.google.com/group/h2-database">group</a>, or in the form of an <a href="http://code.google.com/p/h2database/issues/list">issue report or attachment</a>. Significant contributions need to include the following statement:
@build_1070_p
@build_1071_p
# "I wrote the code, it's mine, and I'm contributing it to H2 for distribution multiple-licensed under the H2 License, version 1.0, and under the Eclipse Public License, version 1.0 (http://h2database.com/html/license.html)."
@build_1071_h2
@build_1072_h2
#Automated Build
@build_1072_p
@build_1073_p
# This build process is automated and runs regularly. The build process includes running the tests and code coverage, using the command line <code>./build.sh clean jar coverage -Dh2.ftpPassword=... uploadBuild</code>. The last results are available here:
@build_1073_a
@build_1074_a
#Test Output
@build_1074_a
@build_1075_a
#Code Coverage Summary
@build_1075_a
@build_1076_a
#Code Coverage Details (download, 1.3 MB)
@build_1076_a
@build_1077_a
#Build Newsfeed
@build_1077_a
@build_1078_a
#Latest Jar File (download, 1 MB)
@build_1079_h2
#Generating Railroad Diagrams
@build_1080_p
# The railroad diagrams are HTML, formatted as nested tables. The diagrams are generated as follows:
@build_1081_li
#The BNF parser (<code>org.h2.bnf.Bnf</code>) reads and parses the BNF from the file <code>help.csv</code>.
@build_1082_li
#The page parser (<code>org.h2.server.web.PageParser</code>) reads the template HTML file and fills in the diagrams.
@build_1083_li
#The rail images (one straight, four junctions, two turns) are generated using a simple Java application.
@build_1084_p
# To generate railroad diagrams for other grammars, see the package <code>org.h2.jcr</code>. This package is used to generate the SQL-2 railroad diagrams for the JCR 2.0 specification.
@changelog_1000_h1
変更履歴
...
...
@@ -1319,979 +1340,952 @@ Centralリポジトリの利用
#Next Version (unreleased)
@changelog_1002_li
#Clustering: there is now a way to detect which cluster instances are running.
#The newsfeeds are now Atom 1.0 standard compliant according to
@changelog_1003_li
#The database is now closed after an out of memory exception, because the database could get corrupt otherwise.
@changelog_1004_h2
#Version 1.2.124 (2009-11-20)
@changelog_1005_li
#Clustering: there is now a way to detect which cluster instances are running.
@changelog_1006_li
#ConvertTraceFile: the SQL statement statistics are better formatted (newline are removed).
@changelog_1004_li
@changelog_1007_li
#The file lock thread is now stopped when the database is closed.
@changelog_1005_li
@changelog_1008_li
#Issue 140: the Script tool now supports writing to a stream.
@changelog_1006_li
@changelog_1009_li
#Issue 138: the trace output of Statement.execute(String, int) and executeUpdate was incorrect.
@changelog_1007_li
@changelog_1010_li
#Page store: new databases can not be opened with older versions.
@changelog_1008_li
@changelog_1011_li
#Page store: multi-column indexes didn't work if the cache was very small.
@changelog_1009_li
@changelog_1012_li
#Page store: opening a database could theoretically result in an endless loop.
@changelog_1010_li
@changelog_1013_li
#Page store: adding large indexed columns could get very slow.
@changelog_1011_li
@changelog_1014_li
#Page store: after a duplicate key exception, an ArrayIndexOutOfBoundsException could be thrown (only for very large rows).
@changelog_1012_li
@changelog_1015_li
#Page store: the recover tool sometimes generated a script file that contained duplicate data.
@changelog_1013_li
@changelog_1016_li
#Page store: sometimes opening a read-only database failed.
@changelog_1014_li
@changelog_1017_li
#Page store: opening a database sometimes failed if large rows where updated, or if a table was truncated before.
@changelog_1015_li
@changelog_1018_li
#Page store: when using a very small page size (128 bytes or smaller), writing a large row could result in an endless recursion. This is only a theoretical problem, as the page size is 2 KB.
@changelog_1016_li
@changelog_1019_li
#Page store: getting the min value from a descending index with NULL entries could return the wrong result.
@changelog_1017_li
@changelog_1020_li
#Page store: improved auto-recovery after power failure.
@changelog_1018_li
@changelog_1021_li
#The JDBC client did not detect that it was not talking to an H2 server. This could result in strange exceptions when trying to connect to another kind of server.
@changelog_1019_li
@changelog_1022_li
#User defined functions can be created with source code. Example: CREATE ALIAS HI AS 'String hi() { return "Hello"; }'
@changelog_1020_li
@changelog_1023_li
#Database file lock: the exception "lock file modified in the future" is longer thrown; instead, opening the file will be delayed by 2 seconds.
@changelog_1021_li
@changelog_1024_li
#Inserting LOBs got slower each time the process was restarted. It could loop endlessly after about 1000 process restarts.
@changelog_1022_li
@changelog_1025_li
#Issue 117: Multi-version concurrency: concurrent MERGE statements now work.
@changelog_1023_li
@changelog_1026_li
#Improved read-only database detection.
@changelog_1024_h2
@changelog_1027_h2
#Version 1.2.123 (2009-11-08)
@changelog_1025_li
@changelog_1028_li
#Page store: new databases can not be opened with older versions.
@changelog_1026_li
@changelog_1029_li
#Page store: updating large rows (rows with more than 2000 bytes of data) could corrupt the database.
@changelog_1027_li
@changelog_1030_li
#Page store: inserting very large rows failed with ArrayIndexOutOfBoundsException.
@changelog_1028_li
@changelog_1031_li
#When using multi-threaded kernel mode, setting disabling locking (LOCK_MODE=0) will now throw an exception. At this time this combination will result in corruption when multiple threads try to update the same table.
@changelog_1029_li
@changelog_1032_li
#The fulltext search methods and fields are now protected instead of private, to make the classes more easily extensible.
@changelog_1030_li
@changelog_1033_li
#The Lucene fulltext search now also returns the score.
@changelog_1031_li
@changelog_1034_li
# New function SCOPE_IDENTITY() to avoid problems when inserting rows in a trigger.
@changelog_1032_li
@changelog_1035_li
#Statement.getGeneratedKeys() returned the wrong value if a trigger changed the identity value after inserting the row.
@changelog_1033_li
@changelog_1036_li
#Improved error messages: identifiers and values are now quoted.
@changelog_1034_li
@changelog_1037_li
#Improved error message when casting a value failed: the column name and type is included in the message.
@changelog_1035_li
@changelog_1038_li
#Improved support for GAE for Java thanks to Vince Bonfanti.
@changelog_1036_h2
@changelog_1039_h2
#Version 1.2.122 (2009-10-28)
@changelog_1037_li
@changelog_1040_li
#The native fulltext search now supports streaming CLOB data.
@changelog_1038_li
@changelog_1041_li
#If the database URL ends with ;PAGE_STORE=TRUE and a database in the old format exists, it is automatically converted to the new page store format if possible. A backup of the database is created first. Automatic conversion is not supported if the database was not closed normally (if it contains uncommitted transactions).
@changelog_1039_li
@changelog_1042_li
#Dropping the current user is now allowed if another admin user exists.
@changelog_1040_li
@changelog_1043_li
#Values of type BINARY or BLOB could not be converted to the data type OTHER.
@changelog_1041_li
@changelog_1044_li
#SHUTDOWN COMPACT now fully compacts the database.
@changelog_1042_li
@changelog_1045_li
#New system properties h2.maxCompactCount and h2.maxCompactTime to allow changing the default behavior (at most 2 seconds compacting when closing the database).
@changelog_1043_li
@changelog_1046_li
#New sorted insert optimization (see Performance / Database Performance Tuning).
@changelog_1044_li
@changelog_1047_li
#Issue 116: The files h2*-sources.jar and h2*-javadoc.jar are now in the Maven repository.
@changelog_1045_li
@changelog_1048_li
#Page store: opening a large database was slow if it was not closed before.
@changelog_1046_li
@changelog_1049_li
#Page store: new write and read counters in the meta data table. Use SELECT * FROM INFORMATION_SCHEMA.SETTINGS WHERE NAME IN( 'info.FILE_WRITE_TOTAL', 'info.FILE_WRITE', 'info.FILE_READ', 'info.CACHE_MAX_SIZE', 'info.CACHE_SIZE')
@changelog_1047_li
@changelog_1050_li
#The SQL syntax is documented using (railroad) diagrams. The diagrams are HTML.
@changelog_1048_li
@changelog_1051_li
#The documentation is no longer available in Japanese because the translation was too much out of sync. Please use the Google translation instead.
@changelog_1049_li
@changelog_1052_li
#Certain queries were not sorted if subselect queries were involved
@changelog_1050_li
@changelog_1053_li
#More bugs in the server-less multi-connection mode have been fixed: 90097 The database is read only, caches must be cleared on reconnect, etc.
@changelog_1051_h2
@changelog_1054_h2
#Version 1.2.121 (2009-10-11)
@changelog_1052_li
@changelog_1055_li
#Better support GaeVFS (Google App Engine Virtual File System) thanks to Thanks to Vince Bonfanti.
@changelog_1053_li
@changelog_1056_li
#CSVREAD didn't close the file. Thanks to Vince Bonfanti for the patch!
@changelog_1054_li
@changelog_1057_li
#If a database in the old format exists, it is now used. The system property is used for new databases, or if databases exist in both formats. In any case, the flag in the URL overrides this logic.
@changelog_1055_li
@changelog_1058_li
#Page store bugs were fixed. Large values in indexed columns could corrupt the index.
@changelog_1056_li
@changelog_1059_li
#The page store did not work when using Retrotranslator (because the Retrotranslator doesn't support Integer.reverse and Long.reverse).
@changelog_1057_li
@changelog_1060_li
#New system property h2.pageStoreTrim to disable shrinking the database when closing (disabled by default, meaning by default the database is trimmed).
@changelog_1058_h2
@changelog_1061_h2
#Version 1.2.120 (2009-10-04)
@changelog_1059_li
@changelog_1062_li
#This is a beta version.
@changelog_1060_li
@changelog_1063_li
#Large updates could throw an ArrayIndexOutOfBoundsException in RowList.writeRow.
@changelog_1061_li
@changelog_1064_li
#In version 1.2, the following system properties are now enabled by default: h2.pageStore, h2.nullConcatIsNull, h2.optimizeInList. The default value for h2.defaultMaxLengthInplaceLob is now 4096 (it was 1024 with version 1.1).
@changelog_1062_li
@changelog_1065_li
#New databases are now stored in the new 'page store' file format. Existing databases are kept in the old file format. To use the old file format, append ;PAGE_STORE=FALSE to the database URL or set the system property h2.pageStore to false.
@changelog_1063_li
@changelog_1066_li
#Issue 125: Renaming primary keys was not persistent. Fixed. Unfortunately, databases created by this version can not be opened with older versions because of this change.
@changelog_1064_li
@changelog_1067_li
#Issue 124: Hibernate schema validation failed for decimal/numeric columns. This problem is fixed in the Hibernate dialect that is included with H2 (src/tools/org/hibernate/dialect/H2Dialect.java.txt), but not in Hibernate yet.
@changelog_1065_li
@changelog_1068_li
#PostgreSQL compatibility: function LASTVAL() as an alias for IDENTITY().
@changelog_1066_li
@changelog_1069_li
#Linked tables now support default values when inserting, updating or merging.
@changelog_1067_li
@changelog_1070_li
#Bugfixes in the page store.
@changelog_1068_li
@changelog_1071_li
#Possibility to set a vendor id in Constants.java, so that unofficial builds are distinguishable from official releases.
@changelog_1069_li
@changelog_1072_li
#Allow writing to linked tables in readonly databases.
@changelog_1070_h2
@changelog_1073_h2
#Version 1.1.119 (2009-09-26)
@changelog_1071_li
@changelog_1074_li
#SQL statements in the exception message are no longer included if they contain '--hide--'.
@changelog_1072_li
@changelog_1075_li
#Temporary local tables did not always work after reconnect if AUTO_SERVER=TRUE
@changelog_1073_li
@changelog_1076_li
#New system property h2.defaultMaxLengthInplaceLob to change the default maximum size of an in-place LOB object.
@changelog_1074_li
@changelog_1077_li
#New system property h2.nullConcatIsNull to change the default null concatenation behavior. The default will be enabled in version 1.2.
@changelog_1075_li
@changelog_1078_li
#The cache algorithm TQ is disabled in this version, because it is unstable, and because the current implementation does not have any measurable advantages over the default.
@changelog_1076_li
@changelog_1079_li
#New committer: Christian Peter. He works for <a href="http://www.docware.com">Docware</a> and helped a lot finding and fixing bugs, and generally improving the database. He is now a committer.
@changelog_1077_li
@changelog_1080_li
#ChangeFileEncryption did not work with Lob subdirectories. Fixed.
@changelog_1078_li
@changelog_1081_li
#Issue 121: JaQu: new simple update and merge methods.
@changelog_1079_li
@changelog_1082_li
#Issue 120: JaQu didn't close result sets.
@changelog_1080_li
@changelog_1083_li
#Issue 119: JaQu creates wrong WHERE conditions on some inputs.
@changelog_1081_li
@changelog_1084_li
#The new page store mechanism is now alpha-level quality. The next release will most likely be "1.2.120 beta" where this mode is enabled by default. To use it right now, append ;PAGE_STORE=TRUE to the database URL. The file format of this mode will probably not change any more.
@changelog_1082_li
@changelog_1085_li
#SELECT COUNT(*) FROM SYSTEM_RANGE(...) returned the wrong result. Fixed.
@changelog_1083_li
@changelog_1086_li
#The Recover tool now also processes the log files, however applying those changes is still a manual process.
@changelog_1084_li
@changelog_1087_li
#New sample application that shows how to pass data to a trigger.
@changelog_1085_li
@changelog_1088_li
#More bugs in the server-less multi-connection mode have been fixed: On Windows, two processes could write to the same database at the same time.
@changelog_1086_li
@changelog_1089_li
#When loading triggers or other client classes (static functions, database event listener, user aggregate functions, other JDBC drivers), the database now uses the context class loader if the class could not be found using Class.forName().
@changelog_1087_li
@changelog_1090_li
#Updating many rows with the same CLOB or BLOB values could result in FileNotFoundException.
@changelog_1088_li
@changelog_1091_li
#Statement.getConnection() threw an exception if the connection was already closed.
@changelog_1089_li
@changelog_1092_li
#The native fulltext index kept a reference to a database after the database was closed.
@changelog_1090_li
@changelog_1093_li
#Non-unique in-memory hash indexes are now supported. Thanks a lot to Sergi Vladykin for the patch!
@changelog_1091_li
@changelog_1094_li
#The optimizer does a better job for joins if indexes are missing.
@changelog_1092_h2
@changelog_1095_h2
#Version 1.1.118 (2009-09-04)
@changelog_1093_li
@changelog_1096_li
#SHOW COLUMNS only listed indexed columns.
@changelog_1094_li
@changelog_1097_li
#When calling SHUTDOWN IMMEDIATELY in the server mode, the .trace.db file was not closed.
@changelog_1095_li
@changelog_1098_li
#DatabaseMetaData.getPrimaryKeys: the wrong constraint name was reported if there was another constraint on the same table and columns.
@changelog_1096_li
@changelog_1099_li
#AUTO_INCREMENT now works in the same way in ALTER TABLE ALTER COLUMN as in CREATE TABLE (it does not create a primary key).
@changelog_1097_li
@changelog_1100_li
#Native fulltext search: before searching, FT_INIT() had to be called. This is no longer required.
@changelog_1098_li
@changelog_1101_li
#Better support GaeVFS (Google App Engine Virtual File System).
@changelog_1099_li
@changelog_1102_li
#JaQu: the plan is to support natural (pure Java / Scala) conditions such as (id == 1 && name.equals("Test")). A proof of concept decompiler is now included (it doesn't work yet).
@changelog_1100_li
@changelog_1103_li
#Various bugfixes and improvements in the page store mechanism (still experimental).
@changelog_1101_li
@changelog_1104_li
#PreparedStatement.setObject now converts a java.lang.Character to a string.
@changelog_1102_li
@changelog_1105_li
#H2 Console: PierPaolo Ucchino has completed the Italian translation. Thanks a lot!
@changelog_1103_li
@changelog_1106_li
#Various tools now use Java 5 var-args, such as main the methods and SimpleResultSet.addRow.
@changelog_1104_li
@changelog_1107_li
#H2 Console: indexes of tables of non-default schemas are now also listed.
@changelog_1105_li
@changelog_1108_li
#Issue 111: Multi-version concurrency / duplicate primary key after rollback.
@changelog_1106_li
@changelog_1109_li
#Issue 110: Multi-version concurrency / wrong exception is thrown.
@changelog_1107_li
@changelog_1110_li
#Parser: sequenceName.NEXTVAL and CURRVAL did not respect the schema search path.
@changelog_1108_li
@changelog_1111_li
#Issue 101: The following sequence could throw the exception "Row not found when trying to delete": start a transaction, insert many rows, delete many rows, rollback. The number of rows depends on the cache size.
@changelog_1109_li
@changelog_1112_li
#The stack trace of very common exceptions is no longer written to the .trace.db file by default.
@changelog_1110_li
@changelog_1113_li
#An optimization for OR is implemented, but disabled by default. Expressions of the type X=1 OR X=2 are converted to X IN(1, 2). To enable, set the system property h2.optimizeInList to true before loading the H2 JDBC driver.
@changelog_1111_li
@changelog_1114_li
#An optimization for IN(..) and IN(SELECT...) is implemented, but disabled by default. To enable, set the system property h2.optimizeInList to true before loading the H2 JDBC driver. If enabled, this overrides h2.optimizeIn and h2.optimizeInJoin. Unlike now, this optimization will also speed up updates and deletes.
@changelog_1112_h2
@changelog_1115_h2
#Version 1.1.117 (2009-08-09)
@changelog_1113_li
@changelog_1116_li
#New committer: Sam Van Oort has been contributing to H2 since quite some time in many ways (on the mailing list, documentation, and in the form of patches). He is now a committer.
@changelog_1114_li
@changelog_1117_li
#JaQu: the order of the fields in the database no longer needs to match the order in the database.
@changelog_1115_li
@changelog_1118_li
#Issue 103: MVCC: the setting MAX_MEMORY_UNDO can currently not be supported when using multi-version concurrency, that means the complete undo log must fit in memory.
@changelog_1116_li
@changelog_1119_li
#LIKE: the escape mechanism can now be disable using ESCAPE ''. The default escape character can be changed using the system property h2.defaultEscape. The default is still '\' (as in MySQL and PostgreSQL).
@changelog_1117_li
@changelog_1120_li
#Views using functions were not re-evaluated when necessary.
@changelog_1118_li
@changelog_1121_li
#Improved MySQL compatibility for SHOW COLUMNS.
@changelog_1119_li
@changelog_1122_li
#Improved PostgreSQL compatibility for timestamp literals with timezone.
@changelog_1120_li
@changelog_1123_li
#Sergi Vladykin translated the error messages to Russian. Thanks a lot!
@changelog_1121_li
@changelog_1124_li
#Support for Java 6 DatabaseMetaData.getTables, getColumns, getProcedures, and getProcedureColumns.
@changelog_1122_li
@changelog_1125_li
#Issue 101: Rollback of a large transaction (more than 100000 rows) could fail.
@changelog_1123_li
@changelog_1126_li
#Various bugfixes and improvements in the page store mechanism (still experimental).
@changelog_1124_li
@changelog_1127_li
#The functions LENGTH, OCTET_LENGTH, and BIT_LENGTH now return BIGINT.
@changelog_1125_li
@changelog_1128_li
#Data types CLOB and BLOB: the maximum precision was Integer.MAX_VALUE, it is now Long.MAX_VALUE.
@changelog_1126_li
@changelog_1129_li
#Multi-threaded kernel: creating and dropping temporary database objects and the potentially free pages list was not correctly synchronized. Thanks a lot to Eric Faulhaber for the test case and patch!
@changelog_1127_li
@changelog_1130_li
#Parsing SQL script files is now faster.
@changelog_1128_li
@changelog_1131_li
#CSV reading is now faster.
@changelog_1129_li
@changelog_1132_li
#SimpleResultSet.newInstance(SimpleRowSource rs) did not work.
@changelog_1130_h2
@changelog_1133_h2
#Version 1.1.116 (2009-07-18)
@changelog_1131_li
@changelog_1134_li
#Server-less multi-connection mode: more bugs are fixed.
@changelog_1132_li
@changelog_1135_li
#The built-in help (INFORMATION_SCHEMA.HELP) is smaller, shrinking the jar file size a bit.
@changelog_1133_li
@changelog_1136_li
#H2 Console: column of tables of non-default schemas are now also listed, except for schemas starting with 'INFO'.
@changelog_1134_li
@changelog_1137_li
#ALTER TABLE: removing an auto-increment or identity column didn't remove the sequence.
@changelog_1135_li
@changelog_1138_li
#Creating indexes is now a bit faster.
@changelog_1136_li
@changelog_1139_li
#PG Server: new system property h2.pgClientEncoding to explicitly set the encoding for clients that don't send the encoding (the default encoding is UTF-8). Thanks a lot to Sergi Vladykin for the patch!
@changelog_1137_li
@changelog_1140_li
#PG Server: improved compatibility by using the type ids of the PostgreSQL driver. Thanks a lot to Sergi Vladykin for the patch!
@changelog_1138_li
@changelog_1141_li
#H2 Console: Oracle system tables are no longer listed, improving performance.
@changelog_1139_li
@changelog_1142_li
#Result sets are now read-only except if the statement or prepared statement was created with the concurrency ResultSet.CONCUR_UPDATABLE. This change is required because the old behavior (all result set are updatable) violated the JDBC spec. For backward compatibility, use the system property h2.defaultResultSetConcurrency.
@changelog_1140_li
@changelog_1143_li
#New system property h2.defaultResultSetConcurrency to change the default result set concurrency.
@changelog_1141_li
@changelog_1144_li
#JDBC: using an invalid result set type or concurrency now throws an exception.
@changelog_1142_li
@changelog_1145_li
#If a pooled connection was not closed but garbage collected, a NullPointerException could occur.
@changelog_1143_li
@changelog_1146_li
#Fulltext search: a NullPointerException was thrown when updating a value that was NULL previously.
@changelog_1144_li
@changelog_1147_li
#The Recover tool did not work with .data.db files of the wrong size.
@changelog_1145_li
@changelog_1148_li
#Triggers: if there was an exception when initializing a trigger, this exception could be hidden, and in some cases (specially when using the Lucene fulltext index mechanism) a NullPointerException was thrown later on. Now the exception that occurred on init is thrown when changing data.
@changelog_1146_li
@changelog_1149_li
#The soft-references cache (CACHE_TYPE=SOFT_LRU) could throw a NullPointerException.
@changelog_1147_li
@changelog_1150_li
#To enable the new page store mechanism, append ;PAGE_STORE=TRUE to the database URL. or set the system property h2.pageStore to true. This mechanism is still experimental, and the file format will change, but it is quite stable now.
@changelog_1148_h2
@changelog_1151_h2
#Version 1.1.115 (2009-06-21)
@changelog_1149_li
@changelog_1152_li
#The new storage mechanism is now alpha quality. To try it out, set the system property "h2.pageStore" to "true" (java -Dh2.pageStore=true). There are still bugs to be found and fixed, for example inserting many rows references a lot of main memory. Performance is currently about the same as with the regular storage mechanism, but the database file size is smaller. The file format is not stable yet.
@changelog_1150_li
@changelog_1153_li
#ALTER TABLE could throw an exception "object already exists" in some cases.
@changelog_1151_li
@changelog_1154_li
#Views: in some situations, an ArrayIndexOutOfBoundsException was thrown when using the same view concurrently.
@changelog_1152_li
@changelog_1155_li
#java.util.UUID is now supported in PreparedStatement.setObject and user defined Java functions. ResultSet.getObject() returns a java.util.UUID when using the UUID data type.
@changelog_1153_li
@changelog_1156_li
#H2 Console: the language was reset to the browser language when disconnecting.
@changelog_1154_li
@changelog_1157_li
#H2 Console: improved Polish translation.
@changelog_1155_li
@changelog_1158_li
#Server-less multi-connection mode: more bugs are fixed.
@changelog_1156_li
@changelog_1159_li
#The download page now included the SHA1 checksums.
@changelog_1157_li
@changelog_1160_li
#Shell tool: the file encoding workaround is now documented if you run java org.h2.tools.Shell -?.
@changelog_1158_li
@changelog_1161_li
#The RunScript tool and SQL statement did not work with the compression method LZF.
@changelog_1159_li
@changelog_1162_li
#Fulltext search: searching for NULL or an empty string threw an exception.
@changelog_1160_li
@changelog_1163_li
#Lucene fulltext search: FTL_DROP_ALL did not drop the triggers.
@changelog_1161_li
@changelog_1164_li
#Backup: if the database contained CLOB or BLOB data, the backup included a file entry for the LOB directory. This caused the restore to fail.
@changelog_1162_li
@changelog_1165_li
#Data types: LONG is now an alias for BIGINT.
@changelog_1163_h2
@changelog_1166_h2
#Version 1.1.114 (2009-06-01)
@changelog_1164_li
@changelog_1167_li
#ResultSetMetaData.getColumnClassName returned the wrong class for CLOB and BLOB columns.
@changelog_1165_li
@changelog_1168_li
#Fulltext search: data is no longer deleted and re-inserted if the indexed columns didn't change.
@changelog_1166_li
@changelog_1169_li
#In some situations, an ArrayIndexOutOfBoundsException was thrown when adding rows. This was caused by a bug in the b-tree code.
@changelog_1167_li
@changelog_1170_li
#Microsoft Windows Vista: when using the the installer, Vista wrote "This program may not have installed correctly." This message should no longer appear (in the h2.nsi file, the line 'RequestExecutionLevel highest' was added).
@changelog_1168_li
@changelog_1171_li
#The Recover tool did not always work when the database contains referential integrity constraints.
@changelog_1169_li
@changelog_1172_li
#Java 1.5 is now required to run H2. If required, Retrotranslator can be used to create a Java 1.4 version (http://retrotranslator.sourceforge.net/).
@changelog_1170_h2
@changelog_1173_h2
#Version 1.1.113 (2009-05-21)
@changelog_1171_li
@changelog_1174_li
#Shell tool: the built-in commands EXIT, HELP, ?, LIST, and so on didn't work with a semicolon at the end.
@changelog_1172_li
@changelog_1175_li
#JDK 1.5 is now required to build the jar file. However it is still possible to create a jar file for Java 1.4. For details, see buildRelease.sh and buildRelease.bat. As an alternative, compile using JDK 1.5 or 1.6 and use Retrotranslator to create a Java 1.4 version (http://retrotranslator.sourceforge.net/).
@changelog_1173_li
@changelog_1176_li
#When deleting or updating many rows in a table, the space in the index file was not re-used in the default mode (persistent database, b-tree index, LOG=1). This caused the index file to grow over time. Workarounds were to delete and re-created the index file, alter the table (add a remove a column), or append ;LOG=2 to the database URL. To disable the change, set the system property h2.reuseSpaceBtreeIndex to false.
@changelog_1174_li
@changelog_1177_li
#Identifiers with a digit and then a dollar sign didn't work. Example: A1$B.
@changelog_1175_li
@changelog_1178_li
#MS SQL Server compatibility: support for linked tables with NVARCHAR, NCHAR, NCLOB, and LONGNVARCHAR.
@changelog_1176_li
@changelog_1179_li
#Android: workaround for a problem when using read-only databases in zip files (skip seems to be implemented incorrectly on the Android system).
@changelog_1177_li
@changelog_1180_li
#Calling execute() or prepareStatement() with null as the SQL statement now throws an exception.
@changelog_1178_li
@changelog_1181_li
#Benchmark: the number of executed statements was incorrect. The H2 database was loaded at the beginning of the test to collect results, now it is loaded at the very end. Thanks to Fred Toussi from HSQLDB for reporting those problems. However the changed do not affect the relative performance.
@changelog_1179_li
@changelog_1182_li
#H2 Console: command line settings are no longer stored in the properties file. They are now only used for the current process, except if they are explicitly saved.
@changelog_1180_li
@changelog_1183_li
#Cache: support for a second level soft-references cache. To enable it, append ;CACHE_TYPE=SOFT_LRU (or SOFT_TQ) to the database URL, or set the system property h2.cacheTypeDefault to "SOFT_LRU" / "SOFT_TQ". Enabling the second level cache reduces performance for small databases, but speeds up large databases. It makes sense to use it if the available memory size is unknown. Thanks a lot to Jan Kotek!
@changelog_1181_h2
@changelog_1184_h2
#Version 1.1.112 (2009-05-01)
@changelog_1182_li
@changelog_1185_li
#JdbcPreparedStatement.toString() could throw a NullPointerException.
#Connection pool: the default login timeout is now 5 minutes.
@changelog_1185_li
@changelog_1188_li
#After truncating tables, opening large databases could become slow because indexes were always re-built unnecessarily when opening.
@changelog_1186_li
@changelog_1189_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_1187_li
@changelog_1190_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_1188_li
@changelog_1191_li
#Improved error message when the .lock.db file modification time is in the future.
@changelog_1189_li
@changelog_1192_li
#The MERGE statement now returns 0 as the generated key if the row was updated.
@changelog_1190_li
@changelog_1193_li
#Running code coverage is now automated.
@changelog_1191_li
@changelog_1194_li
#A file system implementation can now be registered using FileSystem.register.
@changelog_1192_li
@changelog_1195_li
#The database file system is no longer included in the jar file, it moved to the test section.
@changelog_1193_h2
@changelog_1196_h2
#Version 1.1.111 (2009-04-10)
@changelog_1194_li
@changelog_1197_li
#In-memory databases can now run inside the Google App Engine.
@changelog_1195_li
@changelog_1198_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_1196_li
@changelog_1199_li
#The wrong exception was thrown when using unquoted text for the SQL statements COMMENT, ALTER USER, and SET PASSWORD.
@changelog_1197_li
@changelog_1200_li
#The built-in connection pool did not roll back transactions and enable autocommit enabled after closing a connection.
@changelog_1198_li
@changelog_1201_li
#Sometimes a StackOverflow occurred when checking for deadlock. See also http://code.google.com/p/h2database/issues/detail?id=61
@changelog_1199_li
@changelog_1202_li
#The Shell tool no longer truncates results with only one column, and displays a message if data was truncated.
@changelog_1200_h2
@changelog_1203_h2
#Version 1.1.110 (2009-04-03)
@changelog_1201_li
@changelog_1204_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_1202_li
@changelog_1205_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_1203_li
@changelog_1206_li
#The data type of a SUBSTRING method was wrong.
@changelog_1204_li
@changelog_1207_li
#ResultSet.findColumn and get methods with column label parameters now also check for matching column names (like most databases except MySQL).
@changelog_1205_li
@changelog_1208_li
#H2 Console: the browser system property now supports a list of arguments. Example: java -Dh2.browser="open,-a,Safari,%url" ...
@changelog_1206_li
@changelog_1209_li
#Improved Javadoc navigation (similar to Scaladoc).
@changelog_1207_li
@changelog_1210_li
#H2 Console: auto-complete of identifiers did not work correctly for H2 databases in MySQL mode.
@changelog_1208_li
@changelog_1211_li
#DISTINCT and GROUP BY on a CLOB column was broken.
@changelog_1209_li
@changelog_1212_li
#The FTP server moved to the tools section and is no longer included in the h2*.jar file.
@changelog_1210_li
@changelog_1213_li
#Improved error message for unsupported features: now the message says what exactly is not supported.
@changelog_1211_li
@changelog_1214_li
#Improved OSGi support.
@changelog_1212_li
@changelog_1215_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_1213_li
@changelog_1216_li
#The API of the tools changed a bit (each tool now returns an exit code).
@changelog_1214_li
@changelog_1217_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_1215_li
@changelog_1218_li
#CREATE TABLE: improved compatibility (support for UNIQUE NOT NULL).
@changelog_1216_li
@changelog_1219_li
#DatabaseMetaData.getSQLKeywords now returns the correct list.
@changelog_1217_li
@changelog_1220_li
#Deterministic user defined functions did not work when the parameter was a column. Fixed.
@changelog_1218_li
@changelog_1221_li
#JdbcConnectionPool.setLoginTimeout with 0 now uses the default timeout.
@changelog_1219_li
@changelog_1222_li
#Creating a JdbcConnectionPool has been simplified a bit.
@changelog_1220_li
@changelog_1223_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_1221_li
@changelog_1224_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_1222_li
@changelog_1225_li
#Linked tables to SQLite database can now be created.
@changelog_1223_li
@changelog_1226_li
#Nested IN(IN(...)) didn't work.
@changelog_1224_li
@changelog_1227_li
#NIO storage: the nio: prefix was using memory mapped files instead of FileChannel.
@changelog_1225_h2
@changelog_1228_h2
#Version 1.1.109 (2009-03-14)
@changelog_1226_li
@changelog_1229_li
#The optimization for IN(...) is now only used if comparing a column with an index.
@changelog_1227_li
@changelog_1230_li
#User defined functions can now be deterministic (see CREATE ALIAS documentation).
@changelog_1228_li
@changelog_1231_li
#Multiple nested queries in the FROM clause with parameters did not always work.
@changelog_1229_li
@changelog_1232_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_1230_li
@changelog_1233_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_1231_li
@changelog_1234_li
#The functions BITOR, BITAND, BITXOR, and MOD now accept and return BIGINT instead of INT.
@changelog_1232_li
@changelog_1235_li
#Could not use the same linked table multiple times in the same query.
@changelog_1233_li
@changelog_1236_li
#Bugs in the server-less multi-connection mode have been fixed.
@changelog_1234_li
@changelog_1237_li
#Column names could not be named "UNIQUE" (with the quotes).
@changelog_1235_li
@changelog_1238_li
#New system function TRANSACTION_ID() to get the current transaction identifier for a session.
@changelog_1236_h2
@changelog_1239_h2
#Version 1.1.108 (2009-02-28)
@changelog_1237_li
@changelog_1240_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_1238_li
@changelog_1241_li
#JdbcConnectionPool: it was possible to set a negative connection pool size.
@changelog_1239_li
@changelog_1242_li
#Fulltext search did not support table names with a backslash.
@changelog_1240_li
@changelog_1243_li
#The internal IntArray class did not work correctly when initialized with a zero length array.
@changelog_1241_li
@changelog_1244_li
#The H2 Console web application (war file) did only support ASCII characters. Now UTF-8 is supported.
@changelog_1242_li
@changelog_1245_li
#DATEADD does no longer require that the argument is a timestamp.
@changelog_1243_li
@changelog_1246_li
#The database file locking mechanism didn't work correctly on Mac OS.
@changelog_1244_li
@changelog_1247_li
#Some built-in functions reported the wrong precision, scale, and display size.
@changelog_1245_li
@changelog_1248_li
#MySQL compatibility for CREATE TABLE is improved (UNSIGNED, KEY).
@changelog_1246_li
@changelog_1249_li
#Recovery did not work if there were more than 255 lobs stored as files.
@changelog_1247_li
@changelog_1250_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_1248_li
@changelog_1251_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_1249_li
@changelog_1252_li
#The WebServlet did not close the database when un-deploying the web application.
@changelog_1250_li
@changelog_1253_li
#The exception message of failed INSERT or MERGE statements now includes all values and the row number.
@changelog_1251_li
@changelog_1254_li
#If opening a database failed with an out of memory exception, some files were not closed.
@changelog_1252_li
@changelog_1255_li
#Optimizer: the expected runtime calculation was incorrect. The fixed calculation should give slightly better query plans when using many joins.
@changelog_1253_li
@changelog_1256_li
#Improved exception message when connecting to a just started server fails.
@changelog_1254_li
@changelog_1257_li
#Connection.isValid is a bit faster.
@changelog_1255_li
@changelog_1258_li
#H2 Console: the autocomplete feature has been improved a bit. It can now better parse conditions.
@changelog_1256_li
@changelog_1259_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_1257_h2
@changelog_1260_h2
#Version 1.1.107 (2009-01-24)
@changelog_1258_li
@changelog_1261_li
#Some DatabaseMetaData operations did not work for non-admin users for versions 1.1.x.
@changelog_1259_li
@changelog_1262_li
#The MySQL compatibility extension fromUnixTime now used the English locale.
@changelog_1260_li
@changelog_1263_li
#When using LOG=2 and repeatedly updating the last row rows of a table, the index file grew quickly.
@changelog_1261_li
@changelog_1264_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_1262_li
@changelog_1265_li
#Enabling the trace mechanism by creating a specially named file is no longer supported.
@changelog_1263_h2
@changelog_1266_h2
#Version 1.1.106 (2009-01-04)
@changelog_1264_li
@changelog_1267_li
#Statement.setQueryTimeout did not work correctly for some statements.
@changelog_1265_li
@changelog_1268_li
#CREATE DOMAIN: built-in data types can now only be changed if no tables exist.
@changelog_1266_li
@changelog_1269_li
#Linked tables: a workaround for Oracle DATE columns has been implemented.
@changelog_1267_li
@changelog_1270_li
#DatabaseMetaData.getPrimaryKeys: the column PK_NAME now contains the constraint name instead of the index name (compatibility for PostgreSQL and Derby).
@changelog_1268_li
@changelog_1271_li
#Using IN(..) inside a IN(SELECT..) did not always work.
@changelog_1269_li
@changelog_1272_li
#Views with IN(..) that used a view itself did not work.
@changelog_1270_li
@changelog_1273_li
#Union queries with LIMIT or ORDER BY that are used in a view or subquery did not work.
@changelog_1271_li
@changelog_1274_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_1272_li
@changelog_1275_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_1273_li
@changelog_1276_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_1274_h2
@changelog_1277_h2
#Version 1.1.105 (2008-12-19)
@changelog_1275_li
@changelog_1278_li
#The setting STORAGE=TEXT is no longer supported.
@changelog_1276_li
@changelog_1279_li
#Deleting a database using the tool DeleteDbFiles deleted LOB files of other databases in the same directory.
@changelog_1277_li
@changelog_1280_li
#When used in a subquery, LIKE and IN(..) did not work correctly sometimes.
@changelog_1278_li
@changelog_1281_li
#The fulltext search documentation has been improved.
@changelog_1279_li
@changelog_1282_li
#ARRAY_GET returned the wrong data type (ARRAY). Now it returns VARCHAR.
@changelog_1280_li
@changelog_1283_li
#Natural join: the joined columns are not repeated any more when using SELECT *.
@changelog_1281_li
@changelog_1284_li
#User defined aggregate functions: the method getType expected internal data types instead of SQL types.
@changelog_1282_li
@changelog_1285_li
#User defined aggregate functions did not work if there was no group by expression.
@changelog_1283_li
@changelog_1286_li
#MySQL compatibility: support for := assignment as in @sum:=@sum+x
@changelog_1284_li
@changelog_1287_li
#INSERT INTO TEST(SELECT * FROM TEST) is now supported.
@changelog_1285_li
@changelog_1288_li
#Each session threw an invisible exception when garbage collected.
@changelog_1286_li
@changelog_1289_li
#Foreign key constraints that refer to a quoted column did not work.
@changelog_1287_li
@changelog_1290_li
#New meta data column INFORMATION_SCHEMA.TABLES.LAST_MODIFICATION to get the table modification counter.
@changelog_1288_li
@changelog_1291_li
#Shell: line comments didn't work correctly.
@changelog_1289_li
@changelog_1292_li
#H2 Console: columns are now listed for up to 500 tables instead of 100.
@changelog_1290_li
@changelog_1293_li
#H2 Console: Cmd+Enter executes the current statement, Alt+Space for autocomplete.
@changelog_1291_li
@changelog_1294_li
#JaQu: the maximum length of a column can now be defined using maxLength. For an example, see Product.java (maxLength(category, 255)).
@changelog_1292_li
@changelog_1295_li
#Rıdvan Ağar has completed the Turkish translation of the H2 Console. Thanks a lot!
@changelog_1293_h2
@changelog_1296_h2
#Version 1.1.104 (2008-11-28)
@changelog_1294_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_1295_li
#JaQu: tables are now auto-created when running a query.
@changelog_1296_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_1297_li
#The function SUM could overflow when using large values. It returns now a data type that is safe.
#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_1298_li
#The function AVG could overflow when using large values. Fixed.
#JaQu: tables are now auto-created when running a query.
@changelog_1299_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.
#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_1300_li
#Build: JAVA_HOME is now automatically detected on Mac OS X.
#The function SUM could overflow when using large values. It returns now a data type that is safe.
@changelog_1301_li
#Testing for local connections was very slow on some systems.
#The function AVG could overflow when using large values. Fixed.
@changelog_1302_li
#The cache memory usage calculation is more conservative.
#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_1303_li
#Allocating space got slower and slower the larger the database.
#Build: JAVA_HOME is now automatically detected on Mac OS X.
@changelog_1304_li
#ALTER TABLE ALTER COLUMN could throw the wrong exception in the last version (Table not found).
#Testing for local connections was very slow on some systems.
@changelog_1305_li
#Updatable result sets: the key columns can now be updated.
#The cache memory usage calculation is more conservative.
@changelog_1306_li
#The H2DatabaseProvider for ActiveObjects is now included in the tools section.
#Allocating space got slower and slower the larger the database.
@changelog_1307_li
#The H2Platform for Oracle Toplink Essential has been improved a bit.
#ALTER TABLE ALTER COLUMN could throw the wrong exception in the last version (Table not found).
@changelog_1308_li
#The Windows service to start H2 didn't work in version 1.1.
#Updatable result sets: the key columns can now be updated.
@changelog_1309_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).
#The H2DatabaseProvider for ActiveObjects is now included in the tools section.
@changelog_1310_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.
#The H2Platform for Oracle Toplink Essential has been improved a bit.
@changelog_1311_li
#Compatibility for MS SQL Server DATEDIFF(YYYY, .., ..)
#The Windows service to start H2 didn't work in version 1.1.
@changelog_1312_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).
#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_1313_li
#The interface CloseListener has a new method 'remove' that is called when the trigger is dropped.
#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_1314_li
#Fulltext search: there was a memory leak when creating and dropping fulltext indexes in a loop.
#Compatibility for MS SQL Server DATEDIFF(YYYY, .., ..)
@changelog_1315_h2
#Version 1.1.103 (2008-11-07)
@changelog_1315_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_1316_li
#Could not order by a formula when the formula was in the group by list but not in the select list.
#The interface CloseListener has a new method 'remove' that is called when the trigger is dropped.
@changelog_1317_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_1318_li
#ALTER TABLE used a lot of memory when using multi-version concurrency.
@changelog_1319_li
#Referential integrity for in-memory databases didn't work in some cases in version 1.1.102.
@changelog_1320_li
#New column INFORMATION_SCHEMA.COLUMNS.SEQUENCE_NAME to get the name of the sequence for auto-increment columns.
@changelog_1321_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_1322_li
#The Japanese translation has been completed by Masahiro Ikemoto. Thanks a lot!
@changelog_1323_li
#Improved PostgreSQL compatibility for NEXTVAL and CURRVAL.
@changelog_1324_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_1325_li
#New system property h2.browser to set the browser to use.
@changelog_1326_li
#To start the browser, java.awt.Desktop.browse is now used if available.
#Fulltext search: there was a memory leak when creating and dropping fulltext indexes in a loop.
#To start the <a href="quickstart.html#h2_console">H2 Console tool</a>, double click the jar file, or run <code>java -jar h2*.jar</code>, <code>h2.bat</code>, or <code>h2.sh</code>.
...
...
@@ -2447,7 +2441,7 @@ jdbc:h2:mem:
ダウンロード
@download_1001_h3
#Version 1.2.123 (2009-11-08, Beta)
#Version 1.2.124 (2009-11-20, Beta)
@download_1002_a
Windows Installer
...
...
@@ -6284,7 +6278,7 @@ H2 データベース エンジン
#Download Beta
@mainWeb_1007_td
# Version 1.2.123 (2009-11-08):
# Version 1.2.124 (2009-11-20):
@mainWeb_1008_a
#Windows Installer (4 MB)
...
...
@@ -8024,7 +8018,7 @@ H2 コンソール アプリケーション
#Bugfixes
@roadmap_1008_li
#Support large updates (use the transaction log for rollback instead of persistent UndoLog.file).
#Support large updates (use the transaction log for rollback).
#Implement missing JDBC API (CallableStatement,...)
#Linked schema using CSV files: one schema for a directory of files; support indexes for CSV files
@roadmap_1070_li
#Compression of the cache
#iReport to support H2
@roadmap_1071_li
#Include SMPT (mail) server (at least client) (alert on cluster failure, low disk space,...)
#Implement missing JDBC API (CallableStatement,...)
@roadmap_1072_li
#Drop with restrict (currently cascade is the default)
#Compression of the cache
@roadmap_1073_li
#JSON parser and functions
#Include SMPT (mail) server (at least client) (alert on cluster failure, low disk space,...)
@roadmap_1074_li
#Server: client ping from time to time (to avoid timeout - is timeout a problem?)
#Drop with restrict (currently cascade is the default)
@roadmap_1075_li
#Copy database: tool with config GUI and batch mode, extensible (example: compare)
#JSON parser and functions
@roadmap_1076_li
#Document, implement tool for long running transactions using user-defined compensation statements.
#Server: client ping from time to time (to avoid timeout - is timeout a problem?)
@roadmap_1077_li
#Support SET TABLE DUAL READONLY
#Copy database: tool with config GUI and batch mode, extensible (example: compare)
@roadmap_1078_li
#GCJ: what is the state now?
#Document, implement tool for long running transactions using user-defined compensation statements.
@roadmap_1079_li
#Events for: database Startup, Connections, Login attempts, Disconnections, Prepare (after parsing), Web Server (see http://docs.openlinksw.com/virtuoso/fn_dbev_startup.html)
#Support SET TABLE DUAL READONLY
@roadmap_1080_li
#Optimization: log compression
#GCJ: what is the state now?
@roadmap_1081_li
#ROW_NUMBER() OVER([ORDER BY columnName])
#Events for: database Startup, Connections, Login attempts, Disconnections, Prepare (after parsing), Web Server (see http://docs.openlinksw.com/virtuoso/fn_dbev_startup.html)
@roadmap_1082_li
#Support standard INFORMATION_SCHEMA tables, as defined in http://www.contrib.andrew.cmu.edu/~shadow/sql/sql1992.txt; specially KEY_COLUMN_USAGE (http://dev.mysql.com/doc/refman/5.0/en/information-schema.html, http://www.xcdsql.org/Misc/INFORMATION_SCHEMA%20With%20Rolenames.gif)
#Optimization: log compression
@roadmap_1083_li
#Compatibility: in MySQL, HSQLDB, /0.0 is NULL; in PostgreSQL, Derby: division by zero
#ROW_NUMBER() OVER([ORDER BY columnName])
@roadmap_1084_li
#Functional tables should accept parameters from other tables (see FunctionMultiReturn) SELECT * FROM TEST T, P2C(T.A, T.R)
#Support standard INFORMATION_SCHEMA tables, as defined in http://www.contrib.andrew.cmu.edu/~shadow/sql/sql1992.txt; specially KEY_COLUMN_USAGE (http://dev.mysql.com/doc/refman/5.0/en/information-schema.html, http://www.xcdsql.org/Misc/INFORMATION_SCHEMA%20With%20Rolenames.gif)
@roadmap_1085_li
#Custom class loader to reload functions on demand
#Compatibility: in MySQL, HSQLDB, /0.0 is NULL; in PostgreSQL, Derby: division by zero
@roadmap_1086_li
#Test http://mysql-je.sourceforge.net/
#Functional tables should accept parameters from other tables (see FunctionMultiReturn) SELECT * FROM TEST T, P2C(T.A, T.R)
@roadmap_1087_li
#Close all files when closing the database (including LOB files that are open on the client side)
#Custom class loader to reload functions on demand
@roadmap_1088_li
#EXE file: maybe use http://jsmooth.sourceforge.net
#Test http://mysql-je.sourceforge.net/
@roadmap_1089_li
#Performance: automatically build in-memory indexes if the whole table is in memory
#Close all files when closing the database (including LOB files that are open on the client side)
@roadmap_1090_li
#H2 Console: the webclient could support more features like phpMyAdmin.
#EXE file: maybe use http://jsmooth.sourceforge.net
@roadmap_1091_li
#Use Janino to convert Java to C++
#Performance: automatically build in-memory indexes if the whole table is in memory
@roadmap_1092_li
#The HELP information schema can be directly exposed in the Console
#H2 Console: the webclient could support more features like phpMyAdmin.
@roadmap_1093_li
#Maybe use the 0x1234 notation for binary fields, see MS SQL Server
#Use Janino to convert Java to C++
@roadmap_1094_li
#Support Oracle CONNECT BY in some way: http://www.adp-gmbh.ch/ora/sql/connect_by.html, http://philip.greenspun.com/sql/trees.html
#The HELP information schema can be directly exposed in the Console
@roadmap_1095_li
#SQL Server 2005, Oracle: support COUNT(*) OVER(). See http://www.orafusion.com/art_anlytc.htm
#Maybe use the 0x1234 notation for binary fields, see MS SQL Server
#Write Behind Cache on SATA leads to data corruption See also http://sr5tech.com/write_back_cache_experiments.htm and http://www.jasonbrome.com/blog/archives/2004/04/03/writecache_enabled.html
#Option to encrypt .trace.db file
@roadmap_1119_li
#Functions with unknown return or parameter data types: serialize / deserialize
#Write Behind Cache on SATA leads to data corruption See also http://sr5tech.com/write_back_cache_experiments.htm and http://www.jasonbrome.com/blog/archives/2004/04/03/writecache_enabled.html
@roadmap_1120_li
#Test if idle TCP connections are closed, and how to disable that
#Functions with unknown return or parameter data types: serialize / deserialize
@roadmap_1121_li
#Try using a factory for Row, Value[] (faster?), http://javolution.org/, alternative ObjectArray / IntArray
#Test if idle TCP connections are closed, and how to disable that
@roadmap_1122_li
#Auto-Update feature for database, .jar file
#Try using a factory for Row, Value[] (faster?), http://javolution.org/, alternative ObjectArray / IntArray
@roadmap_1123_li
#ResultSet SimpleResultSet.readFromURL(String url): id varchar, state varchar, released timestamp
#Auto-Update feature for database, .jar file
@roadmap_1124_li
#Partial indexing (see PostgreSQL)
#ResultSet SimpleResultSet.readFromURL(String url): id varchar, state varchar, released timestamp
@roadmap_1125_li
#Add GUI to build a custom version (embedded, fulltext,...) using build flags
#Partial indexing (see PostgreSQL)
@roadmap_1126_li
#http://rubyforge.org/projects/hypersonic/
#Add GUI to build a custom version (embedded, fulltext,...) using build flags
@roadmap_1127_li
#Add comparator (x === y) : (x = y or (x is null and y is null))
#http://rubyforge.org/projects/hypersonic/
@roadmap_1128_li
#Try to create trace file even for read only databases
#Add comparator (x === y) : (x = y or (x is null and y is null))
@roadmap_1129_li
#Add a sample application that runs the H2 unit test and writes the result to a file (so it can be included in the user app)
#Try to create trace file even for read only databases
@roadmap_1130_li
#Count on a column that can not be null could be optimized to COUNT(*)
#Add a sample application that runs the H2 unit test and writes the result to a file (so it can be included in the user app)
@roadmap_1131_li
#Table order: ALTER TABLE TEST ORDER BY NAME DESC (MySQL compatibility)
#Count on a column that can not be null could be optimized to COUNT(*)
@roadmap_1132_li
#Backup tool should work with other databases as well
#Table order: ALTER TABLE TEST ORDER BY NAME DESC (MySQL compatibility)
@roadmap_1133_li
#Console: -ifExists doesn't work for the console. Add a flag to disable other dbs
#Backup tool should work with other databases as well
@roadmap_1134_li
#Performance: update in-place
#Console: -ifExists doesn't work for the console. Add a flag to disable other dbs
@roadmap_1135_li
#Check if 'FSUTIL behavior set disablelastaccess 1' improves the performance (fsutil behavior query disablelastaccess)
...
...
@@ -8993,82 +8987,82 @@ H2 コンソール アプリケーション
#CSV: currently # is a line comment and can start at any field. Make it optional.
@roadmap_1331_li
#Add database creation date and time to the database.
#Finer granularity for SLF4J trace - See http://code.google.com/p/h2database/issues/detail?id=62
@roadmap_1332_li
#Support ASSERTIONS.
#Add database creation date and time to the database.
@roadmap_1333_li
#Support multi-threaded kernel with multi-version concurrency.
#Support ASSERTIONS.
@roadmap_1334_li
#MySQL compatibility: support comparing 1='a'
#Support multi-threaded kernel with multi-version concurrency.
