@@ -992,7 +992,7 @@ This database is written in Java and therefore works on many platforms. It can a
Environment
@build_1012_p
A Java Runtime Environment (JRE) version 1.4 or higher is required to run this database.
A Java Runtime Environment (JRE) version 1.5 or higher is required to run this database.
@build_1013_p
To build the database executables, the following software stack was used. Newer version or compatible software works too.
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@@ -1001,7 +1001,7 @@ To build the database executables, the following software stack was used. Newer
Mac OS X and Windows XP
@build_1015_a
Sun JDK Version 1.4, 1.5, and 1.6
Sun JDK Version 1.5 and 1.6
@build_1016_a
Eclipse Version 3.4
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@@ -1031,7 +1031,7 @@ Maven 2.0.9
Building the Software
@build_1025_p
You need to install a JDK, for example the Sun JDK version 1.4, 1.5 or 1.6. Ensure that Java binary directory is included in the PATH environment variable, and that the environment variable JAVA_HOME points to your Java installation. On the command line, go to the directory h2 and execute the following command:
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 PATH environment variable, and that the environment variable JAVA_HOME points to your Java installation. On the command line, go to the directory h2 and execute the following command:
@build_1026_p
For Linux and OS X, use <code>./build.sh</code> instead of <code>build</code> .
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@@ -1043,7 +1043,7 @@ You will get a list of targets. If you want to build the jar file, execute (Wind
Switching the Source Code
@build_1029_p
By default the source code uses Java 1.5 features, however Java 1.4 and 1.5 are supported as well. To switch the source code to the install version of Java, run:
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 install version of Java, run:
@build_1030_h2
Build Targets
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@@ -1112,7 +1112,7 @@ Providing Patches
If you like to provide patches, please consider the following guidelines to simplify merging them:
@build_1052_li
Only use Java 1.4 features (do not use Java 1.5 or 1.6) (see Environment).
Only use Java 1.5 features (do not use Java 1.6) (see Environment).
@build_1053_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> .
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@@ -1172,927 +1172,942 @@ Change Log
Next Version (unreleased)
@changelog_1002_li
-
The RunScript tool and SQL statement did not work with the compression method LZF.
@changelog_1003_h2
Version 1.1.114 (2009-06-01)
@changelog_1003_li
Fulltext search: searching for NULL or an empty string threw an exception.
@changelog_1004_li
ResultSetMetaData.getColumnClassName returned the wrong class for CLOB and BLOB columns.
Lucene fulltext search: FTL_DROP_ALL did not drop the triggers.
@changelog_1005_li
Fulltext search: Data is no longer deleted and re-inserted if the indexed columns didn't change.
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_1006_li
In some situations, an ArrayIndexOutOfBoundsException was thrown when adding rows. This was caused by a bug in the b-tree code.
Data types: LONG is now an alias for BIGINT.
@changelog_1007_li
More bugs in the server-less multi-connection mode have been fixed.
@changelog_1008_h2
Version 1.1.114 (2009-06-01)
@changelog_1009_li
ResultSetMetaData.getColumnClassName returned the wrong class for CLOB and BLOB columns.
@changelog_1010_li
Fulltext search: Data is no longer deleted and re-inserted if the indexed columns didn't change.
@changelog_1011_li
In some situations, an ArrayIndexOutOfBoundsException was thrown when adding rows. This was caused by a bug in the b-tree code.
@changelog_1012_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_1008_li
@changelog_1013_li
The Recover tool did not always work when the database contains referential integrity constraints.
@changelog_1009_li
@changelog_1014_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_1010_h2
@changelog_1015_h2
Version 1.1.113 (2009-05-21)
@changelog_1011_li
@changelog_1016_li
Shell tool: the built-in commands EXIT, HELP, ?, LIST, and so on didn't work with a semicolon at the end.
@changelog_1012_li
@changelog_1017_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_1013_li
@changelog_1018_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_1014_li
@changelog_1019_li
Identifiers with a digit and then a dollar sign didn't work. Example: A1$B.
@changelog_1015_li
@changelog_1020_li
MS SQL Server compatibility: support for linked tables with NVARCHAR, NCHAR, NCLOB, and LONGNVARCHAR.
@changelog_1016_li
@changelog_1021_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_1017_li
@changelog_1022_li
Calling execute() or prepareStatement() with null as the SQL statement now throws an exception.
@changelog_1018_li
@changelog_1023_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_1019_li
@changelog_1024_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_1020_li
@changelog_1025_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_1021_h2
@changelog_1026_h2
Version 1.1.112 (2009-05-01)
@changelog_1022_li
@changelog_1027_li
JdbcPreparedStatement.toString() could throw a NullPointerException.
@changelog_1023_li
@changelog_1028_li
EclipseLink: Added H2Platform.supportsIdentity().
@changelog_1024_li
@changelog_1029_li
Connection pool: the default login timeout is now 5 minutes.
@changelog_1025_li
@changelog_1030_li
After truncating tables, opening large databases could become slow because indexes were always re-built unnecessarily when opening.
@changelog_1026_li
@changelog_1031_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_1027_li
@changelog_1032_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_1028_li
@changelog_1033_li
Improved error message when the .lock.db file modification time is in the future.
@changelog_1029_li
@changelog_1034_li
The MERGE statement now returns 0 as the generated key if the row was updated.
@changelog_1030_li
@changelog_1035_li
Running code coverage is now automated.
@changelog_1031_li
@changelog_1036_li
A file system implementation can now be registered using FileSystem.register.
@changelog_1032_li
@changelog_1037_li
The database file system is no longer included in the jar file, it moved to the test section.
@changelog_1033_h2
@changelog_1038_h2
Version 1.1.111 (2009-04-10)
@changelog_1034_li
@changelog_1039_li
In-memory databases can now run inside the Google App Engine.
@changelog_1035_li
@changelog_1040_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_1036_li
@changelog_1041_li
The wrong exception was thrown when using unquoted text for the SQL statements COMMENT, ALTER USER, and SET PASSWORD.
@changelog_1037_li
@changelog_1042_li
The built-in connection pool did not roll back transactions and enable autocommit enabled after closing a connection.
@changelog_1038_li
@changelog_1043_li
Sometimes a StackOverflow occurred when checking for deadlock. See also http://code.google.com/p/h2database/issues/detail?id=61
@changelog_1039_li
@changelog_1044_li
The Shell tool no longer truncates results with only one column, and displays a message if data was truncated.
@changelog_1040_h2
@changelog_1045_h2
Version 1.1.110 (2009-04-03)
@changelog_1041_li
@changelog_1046_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_1042_li
@changelog_1047_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_1043_li
@changelog_1048_li
The data type of a SUBSTRING method was wrong.
@changelog_1044_li
@changelog_1049_li
ResultSet.findColumn and get methods with column label parameters now also check for matching column names (like most databases except MySQL).
@changelog_1045_li
@changelog_1050_li
H2 Console: the browser system property now supports a list of arguments. Example: java -Dh2.browser="open,-a,Safari,%url" ...
@changelog_1046_li
@changelog_1051_li
Improved Javadoc navigation (similar to Scaladoc).
@changelog_1047_li
@changelog_1052_li
H2 Console: auto-complete of identifiers did not work correctly for H2 databases in MySQL mode.
@changelog_1048_li
@changelog_1053_li
DISTINCT and GROUP BY on a CLOB column was broken.
@changelog_1049_li
@changelog_1054_li
The FTP server moved to the tools section and is no longer included in the h2*.jar file.
@changelog_1050_li
@changelog_1055_li
Improved error message for unsupported features: now the message says what exactly is not supported.
@changelog_1051_li
@changelog_1056_li
Improved OSGi support.
@changelog_1052_li
@changelog_1057_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_1053_li
@changelog_1058_li
The API of the tools changed a bit (each tool now returns an exit code).
@changelog_1054_li
@changelog_1059_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_1055_li
@changelog_1060_li
CREATE TABLE: improved compatibility (support for UNIQUE NOT NULL).
@changelog_1056_li
@changelog_1061_li
DatabaseMetaData.getSQLKeywords now returns the correct list.
@changelog_1057_li
@changelog_1062_li
Deterministic user defined functions did not work when the parameter was a column. Fixed.
@changelog_1058_li
@changelog_1063_li
JdbcConnectionPool.setLoginTimeout with 0 now uses the default timeout.
@changelog_1059_li
@changelog_1064_li
Creating a JdbcConnectionPool has been simplified a bit.
@changelog_1060_li
@changelog_1065_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_1061_li
@changelog_1066_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_1062_li
@changelog_1067_li
Linked tables to SQLite database can now be created.
@changelog_1063_li
@changelog_1068_li
Nested IN(IN(...)) didn't work.
@changelog_1064_li
@changelog_1069_li
NIO storage: the nio: prefix was using memory mapped files instead of FileChannel.
@changelog_1065_h2
@changelog_1070_h2
Version 1.1.109 (2009-03-14)
@changelog_1066_li
@changelog_1071_li
The optimization for IN(...) is now only used if comparing a column with an index.
@changelog_1067_li
@changelog_1072_li
User defined functions can now be deterministic (see CREATE ALIAS documentation).
@changelog_1068_li
@changelog_1073_li
Multiple nested queries in the FROM clause with parameters did not always work.
@changelog_1069_li
@changelog_1074_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_1070_li
@changelog_1075_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_1071_li
@changelog_1076_li
The functions BITOR, BITAND, BITXOR, and MOD now accept and return BIGINT instead of INT.
@changelog_1072_li
@changelog_1077_li
Could not use the same linked table multiple times in the same query.
@changelog_1073_li
@changelog_1078_li
Bugs in the server-less multi-connection mode have been fixed.
@changelog_1074_li
@changelog_1079_li
Column names could not be named "UNIQUE" (with the quotes).
@changelog_1075_li
@changelog_1080_li
New system function TRANSACTION_ID() to get the current transaction identifier for a session.
@changelog_1076_h2
@changelog_1081_h2
Version 1.1.108 (2009-02-28)
@changelog_1077_li
@changelog_1082_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_1078_li
@changelog_1083_li
JdbcConnectionPool: it was possible to set a negative connection pool size.
@changelog_1079_li
@changelog_1084_li
Fulltext search did not support table names with a backslash.
@changelog_1080_li
@changelog_1085_li
The internal IntArray class did not work correctly when initialized with a zero length array.
@changelog_1081_li
@changelog_1086_li
The H2 Console web application (war file) did only support ASCII characters. Now UTF-8 is supported.
@changelog_1082_li
@changelog_1087_li
DATEADD does no longer require that the argument is a timestamp.
@changelog_1083_li
@changelog_1088_li
The database file locking mechanism didn't work correctly on Mac OS.
@changelog_1084_li
@changelog_1089_li
Some built-in functions reported the wrong precision, scale, and display size.
@changelog_1085_li
@changelog_1090_li
MySQL compatibility for CREATE TABLE is improved (UNSIGNED, KEY).
@changelog_1086_li
@changelog_1091_li
Recovery did not work if there were more than 255 lobs stored as files.
@changelog_1087_li
@changelog_1092_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_1088_li
@changelog_1093_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_1089_li
@changelog_1094_li
The WebServlet did not close the database when un-deploying the web application.
@changelog_1090_li
@changelog_1095_li
The exception message of failed INSERT or MERGE statements now includes all values and the row number.
@changelog_1091_li
@changelog_1096_li
If opening a database failed with an out of memory exception, some files were not closed.
@changelog_1092_li
@changelog_1097_li
Optimizer: the expected runtime calculation was incorrect. The fixed calculation should give slightly better query plans when using many joins.
@changelog_1093_li
@changelog_1098_li
Improved exception message when connecting to a just started server fails.
@changelog_1094_li
@changelog_1099_li
Connection.isValid is a bit faster.
@changelog_1095_li
@changelog_1100_li
H2 Console: The autocomplete feature has been improved a bit. It can now better parse conditions.
@changelog_1096_li
@changelog_1101_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_1097_h2
@changelog_1102_h2
Version 1.1.107 (2009-01-24)
@changelog_1098_li
@changelog_1103_li
Some DatabaseMetaData operations did not work for non-admin users for versions 1.1.x.
@changelog_1099_li
@changelog_1104_li
The MySQL compatibility extension fromUnixTime now used the English locale.
@changelog_1100_li
@changelog_1105_li
When using LOG=2 and repeatedly updating the last row rows of a table, the index file grew quickly.
@changelog_1101_li
@changelog_1106_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_1102_li
@changelog_1107_li
Enabling the trace mechanism by creating a specially named file is no longer supported.
@changelog_1103_h2
@changelog_1108_h2
Version 1.1.106 (2009-01-04)
@changelog_1104_li
@changelog_1109_li
Statement.setQueryTimeout did not work correctly for some statements.
@changelog_1105_li
@changelog_1110_li
CREATE DOMAIN: Built-in data types can now only be changed if no tables exist.
@changelog_1106_li
@changelog_1111_li
Linked tables: a workaround for Oracle DATE columns has been implemented.
@changelog_1107_li
@changelog_1112_li
DatabaseMetaData.getPrimaryKeys: The column PK_NAME now contains the constraint name instead of the index name (compatibility for PostgreSQL and Derby).
@changelog_1108_li
@changelog_1113_li
Using IN(..) inside a IN(SELECT..) did not always work.
@changelog_1109_li
@changelog_1114_li
Views with IN(..) that used a view itself did not work.
@changelog_1110_li
@changelog_1115_li
Union queries with LIMIT or ORDER BY that are used in a view or subquery did not work.
@changelog_1111_li
@changelog_1116_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_1112_li
@changelog_1117_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_1113_li
@changelog_1118_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_1114_h2
@changelog_1119_h2
Version 1.1.105 (2008-12-19)
@changelog_1115_li
@changelog_1120_li
The setting STORAGE=TEXT is no longer supported.
@changelog_1116_li
@changelog_1121_li
Deleting a database using the tool DeleteDbFiles deleted LOB files of other databases in the same directory.
@changelog_1117_li
@changelog_1122_li
When used in a subquery, LIKE and IN(..) did not work correctly sometimes.
@changelog_1118_li
@changelog_1123_li
The fulltext search documentation has been improved.
@changelog_1119_li
@changelog_1124_li
ARRAY_GET returned the wrong data type (ARRAY). Now it returns VARCHAR.
@changelog_1120_li
@changelog_1125_li
Natural join: the joined columns are not repeated any more when using SELECT *.
@changelog_1121_li
@changelog_1126_li
User defined aggregate functions: the method getType expected internal data types instead of SQL types.
@changelog_1122_li
@changelog_1127_li
User defined aggregate functions did not work if there was no group by expression.
@changelog_1123_li
@changelog_1128_li
MySQL compatibility: support for := assignment as in @sum:=@sum+x
@changelog_1124_li
@changelog_1129_li
INSERT INTO TEST(SELECT * FROM TEST) is now supported.
@changelog_1125_li
@changelog_1130_li
Each session threw an invisible exception when garbage collected.
@changelog_1126_li
@changelog_1131_li
Foreign key constraints that refer to a quoted column did not work.
@changelog_1127_li
@changelog_1132_li
New meta data column INFORMATION_SCHEMA.TABLES.LAST_MODIFICATION to get the table modification counter.
@changelog_1128_li
@changelog_1133_li
Shell: line comments didn't work correctly.
@changelog_1129_li
@changelog_1134_li
H2 Console: Columns are now listed for up to 500 tables instead of 100.
@changelog_1130_li
@changelog_1135_li
H2 Console: Cmd+Enter executes the current statement, Alt+Space for autocomplete.
@changelog_1131_li
@changelog_1136_li
JaQu: the maximum length of a column can now be defined using maxLength. For an example, see Product.java (maxLength(category, 255)).
@changelog_1132_li
@changelog_1137_li
R&\#305;dvan A&\#287;ar has completed the Turkish translation of the H2 Console. Thanks a lot!
@changelog_1133_h2
@changelog_1138_h2
Version 1.1.104 (2008-11-28)
@changelog_1134_li
@changelog_1139_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_1135_li
@changelog_1140_li
JaQu: tables are now auto-created when running a query.
@changelog_1136_li
@changelog_1141_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_1137_li
@changelog_1142_li
The function SUM could overflow when using large values. It returns now a data type that is safe.
@changelog_1138_li
@changelog_1143_li
The function AVG could overflow when using large values. Fixed.
@changelog_1139_li
@changelog_1144_li
The emergency reserve file has been removed. It didn't provide an appropriate solution for the problem. It is still possible for an application to detect and deal with the low disk space problem (deleting temporary files for example) using DatabaseEventListener.diskSpaceIsLow, but this method is now always called with stillAvailable=0.
@changelog_1140_li
@changelog_1145_li
Build: JAVA_HOME is now automatically detected on Mac OS X.
@changelog_1141_li
@changelog_1146_li
Testing for local connections was very slow on some systems.
@changelog_1142_li
@changelog_1147_li
The cache memory usage calculation is more conservative.
@changelog_1143_li
@changelog_1148_li
Allocating space got slower and slower the larger the database.
@changelog_1144_li
@changelog_1149_li
ALTER TABLE ALTER COLUMN could throw the wrong exception in the last version (Table not found).
@changelog_1145_li
@changelog_1150_li
Updatable result sets: the key columns can now be updated.
@changelog_1146_li
@changelog_1151_li
The H2DatabaseProvider for ActiveObjects is now included in the tools section.
@changelog_1147_li
@changelog_1152_li
The H2Platform for Oracle Toplink Essential has been improved a bit.
@changelog_1148_li
@changelog_1153_li
The Windows service to start H2 didn't work in version 1.1.
@changelog_1149_li
@changelog_1154_li
File systems with a maximum file size (for example FAT) are now supported using the file prefix 'split:'. In this case the files are split in parts of 1 GB. Example URL: jdbc:h2:split:~/db/test. If you want to split into parts of 1 MB, use jdbc:h2:split:20:~/db/test (the part size is 1 << x, the default is 30 meaning 1 GB).
@changelog_1150_li
@changelog_1155_li
The database now tries to detect if the classloader or virtual machine has almost shut down by checking if static final variables are set to null. This should help reduce exceptions when stopping the web application.
@changelog_1151_li
@changelog_1156_li
Compatibility for MS SQL Server DATEDIFF(YYYY, .., ..)
@changelog_1152_li
@changelog_1157_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_1153_li
@changelog_1158_li
The interface CloseListener has a new method 'remove' that is called when the trigger is dropped.
@changelog_1154_li
@changelog_1159_li
Fulltext search: there was a memory leak when creating and dropping fulltext indexes in a loop.
@changelog_1155_h2
@changelog_1160_h2
Version 1.1.103 (2008-11-07)
@changelog_1156_li
@changelog_1161_li
Could not order by a formula when the formula was in the group by list but not in the select list.
@changelog_1157_li
@changelog_1162_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_1158_li
@changelog_1163_li
ALTER TABLE used a lot of memory when using multi-version concurrency.
@changelog_1159_li
@changelog_1164_li
Referential integrity for in-memory databases didn't work in some cases in version 1.1.102.
@changelog_1160_li
@changelog_1165_li
New column INFORMATION_SCHEMA.COLUMNS.SEQUENCE_NAME to get the name of the sequence for auto-increment columns.
@changelog_1161_li
@changelog_1166_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_1162_li
@changelog_1167_li
The Japanese translation has been completed by Masahiro Ikemoto. Thanks a lot!
@changelog_1163_li
@changelog_1168_li
Improved PostgreSQL compatibility for NEXTVAL and CURRVAL.
@changelog_1164_li
@changelog_1169_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_1165_li
@changelog_1170_li
New system property h2.browser to set the browser to use.
@changelog_1166_li
@changelog_1171_li
To start the browser, java.awt.Desktop.browse is now used if available.
@changelog_1167_h2
@changelog_1172_h2
Version 1.1.102 (2008-10-24)
@changelog_1168_li
@changelog_1173_li
The French translation of the H2 Console has been improved by Olivier Parent. Thanks a lot!
@changelog_1169_li
@changelog_1174_li
There was a memory leak when creating and dropping tables and indexes in a loop (persistent database only).
@changelog_1170_li
@changelog_1175_li
SET LOG 2 was not effective if executed after opening the database.
@changelog_1171_li
@changelog_1176_li
Translating the H2 Console is now simpler.
@changelog_1172_li
@changelog_1177_li
Common exception (error code 23*) are no longer written to the .trace.db file by default.
@changelog_1173_li
@changelog_1178_li
In-memory databases don't write LOBs to files any longer.
@changelog_1174_li
@changelog_1179_li
Self referencing constraints didn't restrict deleting rows that reference itself if there is another row that references it.
@changelog_1175_li
@changelog_1180_li
ResultSetMetaData.getColumnName now returns the alias name except for columns.
@changelog_1176_li
@changelog_1181_li
Temporary files are now deleted when the database is closed, even if they were not garbage collected so far.
@changelog_1177_h2
@changelog_1182_h2
Version 1.1.101 (2008-10-17)
@changelog_1178_li
@changelog_1183_li
Errors with code 42000 - 42999 are no longer written to the trace file by default.
@changelog_1179_li
@changelog_1184_li
Queries with more than 10 tables are now faster.
@changelog_1180_li
@changelog_1185_li
Opening a connection with AUTO_SERVER=TRUE is now fast when the database is already open in another process (less than 0.01 seconds instead of 2 seconds).
@changelog_1181_li
@changelog_1186_li
IF [NOT] EXISTS is supported for named constraints in ALTER TABLE ... ADD/DROP CONSTRAINT.
@changelog_1182_li
@changelog_1187_li
The error messages have been translated to Spanish by Dario V. Fassi. Thanks a lot!
@changelog_1183_li
@changelog_1188_li
Linked tables: the automatic connection sharing didn't work. Actually the system property h2.shareLinkedConnections was working in the opposite direction: it was disabled when set to true. Now it works as expected.
@changelog_1184_li
@changelog_1189_li
Opening large database is now faster.
@changelog_1185_li
@changelog_1190_li
New system property h2.socketConnectTimeout, the timeout in milliseconds to connect to a server. The default is 2000 (2 seconds).
@changelog_1186_li
@changelog_1191_li
The wrong parameters were bound to subqueries with parameters, specially when using IN(SELECT ...) and IN(...).
@changelog_1187_li
@changelog_1192_li
Unset parameters were not detected when the query was re-compiled.
@changelog_1188_li
@changelog_1193_li
New functions ISO_YEAR, ISO_WEEK, ISO_DAY_OF_WEEK. Thanks a lot to Robert Rathsack for implementing those!
@changelog_1189_li
@changelog_1194_li
The date functions DAYOFYEAR, DAYOFMONTH, DAYOFWEEK are now called DAY_OF_YEAR, DAY_OF_MONTH, DAY_OF_WEEK (the old names still work).
@changelog_1190_li
@changelog_1195_li
An out of memory error while deleting or updating many rows could result in a strange exception.
@changelog_1191_li
@changelog_1196_li
Linked tables: compatibility with MS SQL Server has been improved.
@changelog_1192_li
@changelog_1197_li
Renaming tables that have foreign keys with cascade didn't work correctly.
@changelog_1193_li
@changelog_1198_li
The auto-reconnect feature didn't work when using the auto-server mode. Fixed.
@changelog_1194_li
@changelog_1199_li
Fulltext search: new method FT_DROP_INDEX.
@changelog_1195_li
@changelog_1200_li
The optimization to group using an index didn't work in some cases in version 1.1 (see also system property h2.optimizeGroupSorted).
@changelog_1196_li
@changelog_1201_li
OSGi meta data is included in the manifest file. An OSGi BundleActivator is included: it loads the database driver when starting the bundle, and unloads it when stopping the bundle.
@changelog_1197_li
@changelog_1202_li
The default value for MAX_MEMORY_UNDO is now 50000.
@changelog_1198_li
@changelog_1203_li
For alias columns, ResultSetMetaData.getTableName() and getColumnName() now return the real table and column name in the default mode.
@changelog_1199_li
@changelog_1204_li
In SQL scripts created with SCRIPT TO, schemas are now only created if they don't exist yet.
@changelog_1200_li
@changelog_1205_li
After re-connecting to a database, the database event listener (if set) is informed about it.
@changelog_1201_li
@changelog_1206_li
Local temporary tables now support indexes. Thanks a lot to Matt Roy!
@changelog_1202_li
@changelog_1207_li
RUNSCRIPT no longer uses a temporary file.
@changelog_1203_li
@changelog_1208_li
New system table INFORMATION_SCHEMA.SESSION_STATE containing the SQL statements that make up the session state. The list currently contains variables (SET @..) and local temporary tables (without data).
@changelog_1204_li
@changelog_1209_li
After an automatic re-connect, part of the session state stays (the part that is stored in the SESSION_STATE table).
@changelog_1205_li
@changelog_1210_li
The build didn't work if the directory temp didn't exist before.
@changelog_1206_li
@changelog_1211_li
New system property h2.maxReconnect (default 3) to limit the number of re-connects for the same SQL statement (this is usually only important for SHUTDOWN).
@changelog_1207_li
@changelog_1212_li
WHERE .. IN (SELECT ...) could throw a NullPointerException.
@changelog_1208_li
@changelog_1213_li
Improved Glassfish / Toplink support in H2Platform thanks to Marcio Borges from Brazil. Thanks a lot!
@changelog_1209_h2
@changelog_1214_h2
Version 1.1.100 (2008-10-04)
@changelog_1210_li
@changelog_1215_li
In version 1.1, the following system properties are now enabled by default: h2.lobFilesInDirectories, h2.optimizeGroupSorted, h2.optimizeInJoin, h2.shareLinkedConnections
@changelog_1211_li
@changelog_1216_li
The H2 Console tool now works with the JDBC-ODBC bridge.
@changelog_1212_li
@changelog_1217_li
The H2 Console tool now supports command line options to start things separately.
@changelog_1213_li
@changelog_1218_li
Large objects did not work for in-memory databases in server mode in Linux.
@changelog_1214_li
@changelog_1219_li
Connections from a local address other than 'localhost' were not allowed if remote connections were disabled. This was always a problem, but only got visible in the last release because the server no longer connects to 'localhost' if networked.
@changelog_1215_li
@changelog_1220_li
The h2console.war can now be built using the Java build.
@changelog_1216_li
@changelog_1221_li
By default, databases are shared in the same process. For read-only databases this causes unnecessary synchronization, but safes memory. If you want that each connection opens its own database, append ;OPEN_NEW=TRUE to the database URL.
@changelog_1217_li
@changelog_1222_li
New auto-reconnect feature will cause the JDBC driver to reconnect to the database if the connection is lost. To enable, append ;AUTO_RECONNECT=TRUE to the database URL. This is specially helpful when using AUTO_SERVER. AUTO_SERVER automatically uses auto-reconnect.
@changelog_1218_li
@changelog_1223_li
CreateCluster: the property 'serverlist' is now called 'serverList'.
@changelog_1219_li
@changelog_1224_li
The ConvertTraceFile tool could not parse some files because the trace mechanism did not encode prepared statement parameters.
@changelog_1220_li
@changelog_1225_li
Databases names can now be one character long (the minimum size used to be 2 characters).
@changelog_1221_h2
@changelog_1226_h2
Version 1.0.79 (2008-09-26)
@changelog_1222_li
@changelog_1227_li
Linked tables that point to the same database can now share the connection within the same database. Access to the same connection is serialized. To enable this feature, set the system property h2.shareLinkedConnections to true.
@changelog_1223_li
@changelog_1228_li
Multiple processes can now access the same database without having to explicitly start the server. To do that, append ;AUTO_SERVER=TRUE to the database URL. In this case, the server is started automatically if the connection is in embedded mode, and the server mode is used if a server is running. If the process that opened the first connection is closed, the other client need to reconnect (there is no automatic re-connect so far). Remote connections are allowed, but only to this database.
@changelog_1224_li
@changelog_1229_li
The server tool now displays the correct IP address if networked.
@changelog_1225_li
@changelog_1230_li
Can now start a TCP server with port 0 (automatically select a port).
@changelog_1226_li
@changelog_1231_li
Result sets with just a unique index can now be updated (previously a primary key was required).
@changelog_1227_li
@changelog_1232_li
LINKED TABLE: the schema name can now be set. When multiple tables exist in different schema, and the schema name is not set, an exception is thrown.
@changelog_1228_li
@changelog_1233_li
LINKED TABLE: worked around a bug in Oracle with the CHAR data type.
@changelog_1229_li
@changelog_1234_li
Faster hash code calculation for large binary arrays.
@changelog_1230_li
@changelog_1235_li
Faster storage re-use algorithm thanks to Greg Dhuse from cleversafe.com.
@changelog_1231_li
@changelog_1236_li
The database supports the SHOW command for better MySQL and PostgreSQL compatibility.
@changelog_1232_li
@changelog_1237_li
The H2 Console now abbreviates large texts in results.
@changelog_1233_li
@changelog_1238_li
Multiple UNION queries could not be used in derived tables.
@changelog_1234_li
@changelog_1239_li
Linked tables can now be read-only.
@changelog_1235_li
@changelog_1240_li
Temporary linked tables are now supported.
@changelog_1236_li
@changelog_1241_li
It was possible to create tables in read-only databases.
@changelog_1237_li
@changelog_1242_li
SET SCHEMA_SEARCH_PATH is now documented.
@changelog_1238_li
@changelog_1243_li
SET SCHEMA did not work for views.
@changelog_1239_li
@changelog_1244_li
Row level locking for MVCC is now enabled. The exception 'Concurrent update in table ...' is still thrown, but only after the lock timeout.
@changelog_1240_li
@changelog_1245_li
The maximum log file size setting was ignored for large databases.
@changelog_1241_li
@changelog_1246_li
Multi-Version Concurrency (MVCC) may no longer be used when using the multi-threaded kernel feature (MULTI_THREADED). An exception is thrown when trying to connect with both settings. Additional synchronization is required before those features can be used together.
@changelog_1242_li
@changelog_1247_li
The data type JAVA_OBJECT could not be used in updatable result sets.
@changelog_1243_li
@changelog_1248_li
The system property h2.optimizeInJoin did not work correctly.
@changelog_1244_li
@changelog_1249_li
Conditions such as ID=? AND ID>? were slow.
@changelog_1245_h2
@changelog_1250_h2
Version 1.0.78 (2008-08-28)
@changelog_1246_li
@changelog_1251_li
The documentation no longer uses a frameset (except the Javadocs).
@changelog_1247_li
@changelog_1252_li
When using DB_CLOSE_DELAY, sometimes a NullPointerException is thrown when the database is opened almost at the same time as it is closed automatically. Thanks a lot to Dmitry Pekar for finding this!
@changelog_1248_li
@changelog_1253_li
Java methods with variable number of parameters can now be used (for Java 1.5 or newer).
@changelog_1249_li
@changelog_1254_li
The Japanese translation has been improved by Masahiro Ikemoto. Thanks a lot!
@changelog_1250_li
@changelog_1255_li
The H2 Console replaced an empty user name with a single space.
@changelog_1251_li
@changelog_1256_li
The build target 'build jarSmall' now includes the embedded database.
@changelog_1252_li
@changelog_1257_li
JdbcDataSource now keeps the password in a char array where possible.
@changelog_1253_li
@changelog_1258_li
ResultSet.absolute did not always work with large result sets.
@changelog_1254_li
@changelog_1259_li
Column aliases can now be used in GROUP BY and HAVING.
@changelog_1255_li
@changelog_1260_li
Jason Brittain has contributed MySQL date functions. Thanks a lot! They are not in the h2.jar file currently, but in src/tools/org/h2/mode/FunctionsMySQL.java. To install, add this class to the classpath and call FunctionsMySQL.register(conn) in the Java code.
@changelog_1256_h2
@changelog_1261_h2
Version 1.0.77 (2008-08-16)
@changelog_1257_li
@changelog_1262_li
JaQu is now using prepared statements and supports Date, Time, Timestamp.
@changelog_1258_li
@changelog_1263_li
When using remote in-memory databases, large LOB objects did not work.
@changelog_1259_li
@changelog_1264_li
Timestamp columns such as TIMESTAMP(6) were not compatible to other database.
@changelog_1260_li
@changelog_1265_li
Opening a large database was slow if there was a problem opening the previous time.
@changelog_1261_li
@changelog_1266_li
NOT IN(SELECT ...) was incorrect if the subquery returns no rows.
@changelog_1262_li
@changelog_1267_li
CREATE TABLE AS SELECT did not work correctly in the multi-version concurrency mode.
@changelog_1263_li
@changelog_1268_li
Support a comma before closing a list, as in: create table test(id int,)
@changelog_1264_li
@changelog_1269_li
MySQL compatibility: linked tables had lower case column names on some systems.
@changelog_1265_li
@changelog_1270_li
DB2 compatibility: the DB2 fetch-first-clause is supported.
@changelog_1266_li
@changelog_1271_li
Oracle compatibility: old style outer join syntax using (+) did work correctly sometimes.
@changelog_1267_li
@changelog_1272_li
ResultSet.setFetchSize is now supported.
@changelog_1268_li
@changelog_1273_li
It has been reported that when using Install4j on some Linux systems and enabling the 'pack200' option, the h2.jar becomes corrupted by the install process, causing application failure. A workaround is to add an empty file h2.jar.nopack next to the h2.jar file. The reason for this problem is not known.
@changelog_1269_h2
@changelog_1274_h2
Version 1.0.76 (2008-07-27)
@changelog_1270_li
@changelog_1275_li
The comment of a domain (user defined data type) is now used as the default column comment when creating a column with this domain.
@changelog_1271_li
@changelog_1276_li
Invalid database names are now detected and a better error message is thrown.
@changelog_1272_li
@changelog_1277_li
ResultSetMetaData.getColumnClassName now returns the correct class name for BLOB and CLOB.
@changelog_1273_li
@changelog_1278_li
Fixed the Oracle mode: Oracle allows multiple rows only where all columns of the unique index are NULL.
@changelog_1274_li
@changelog_1279_li
There is a problem with Hibernate when using Boolean columns. A patch for Hibernate has been submitted at http://opensource.atlassian.com/projects/hibernate/browse/HHH-3401
@changelog_1275_li
@changelog_1280_li
ORDER BY on tableName.columnName didn't work correctly if the column name was also used as an alias.
@changelog_1276_li
@changelog_1281_li
H2 Console: The progress display when opening a database has been improved.
@changelog_1277_li
@changelog_1282_li
The error message when the server doesn't start has been improved.
@changelog_1278_li
@changelog_1283_li
Key values can now be changed in updatable result sets.
@changelog_1279_li
@changelog_1284_li
Changes in updatable result sets are now visible even when resetting the result set.
@changelog_1280_li
@changelog_1285_li
Temporary files were sometimes deleted too late when executing large insert, update, or delete operations.
@changelog_1281_li
@changelog_1286_li
The database file was growing after deleting many rows, and after large update operations.
@changelog_1282_h2
@changelog_1287_h2
Version 1.0.75 (2008-07-14)
@changelog_1283_li
@changelog_1288_li
Multi version concurrency (MVCC): when a row was updated or deleted, but this change was rolled back, the row was not visible by other sessions if no index was used to access it. Fixed.
@changelog_1284_li
@changelog_1289_li
Views with multiple joined tables (where one was an outer join) couldn't be used in some cases. Fixed.
@changelog_1285_li
@changelog_1290_li
The CSVREAD method did not process NULL correctly when using a whitespace field separator.
@changelog_1286_li
@changelog_1291_li
Fixed the Oracle mode: Oracle allows multiple rows with NULL in a unique index.
@changelog_1287_li
@changelog_1292_li
Running out of memory could result in incomplete transactions or corrupted databases. Fixed.
@changelog_1288_li
@changelog_1293_li
When using order by in a query that uses the same table multiple times, the order could be incorrect. Fixed.
@changelog_1289_li
@changelog_1294_li
Referential constraint checking improvement: now the constraint is only checked if the key column values change.
@changelog_1290_li
@changelog_1295_li
Some database metadata calls returned the wrong data type for DATA_TYPE columns.
@changelog_1291_li
@changelog_1296_li
The Lucene fulltext index was empty when opening a database with fulltext index enabled, and re-indexing it didn't work. Fixed.
@changelog_1292_li
@changelog_1297_li
The character '$' could not be used in identifier names (table name, column names and so on). Fixed.
@changelog_1293_li
@changelog_1298_li
The new method org.h2.tools.Server.startWebServer(conn) starts the H2 Console to inspect a database while debugging.
@changelog_1294_li
@changelog_1299_li
Stopping a WebServer didn't always work. Fixed.
@changelog_1295_h2
@changelog_1300_h2
Version 1.0.74 (2008-06-21)
@changelog_1296_li
@changelog_1301_li
Work on row level locking has been started (but there is nothing usable yet).
@changelog_1297_li
@changelog_1302_li
JaQu (Java Query), a tool similar to LINQ (Language Integrated Query; from Microsoft) is now included under src/tools/org/h2/jaqu. A small sample application is included under src/test/org/h2/test/jaqu.
@changelog_1298_li
@changelog_1303_li
The source code is now switched to Java 1.6 by default. To switch back to Java 1.4, run 'build compile'. The h2.jar file is still Java 1.4.
@changelog_1299_li
@changelog_1304_li
The ChangePassword tool is now called ChangeFileEncryption.
@changelog_1300_li
@changelog_1305_li
It is no longer allowed to create columns with the data type NULL. Also, it is no longer allowed to convert a column to the data type NULL. This was possible before but caused data loss.
@changelog_1301_li
@changelog_1306_li
When using computed columns or default values with a different data type than the column data type, a class cast exception could occur. Fixed.
@changelog_1302_li
@changelog_1307_li
Opening databases larger than 1 GB was sometimes very slow if a lot of data was deleted previously. Fixed.
@changelog_1303_li
@changelog_1308_li
RUNSCRIPT could throw a NullPointerException if the script name was an expression.
@changelog_1304_li
@changelog_1309_li
Improved compatibility. New compatibility modes for Oracle and Derby. New compatibility flag uniqueIndexNullDistinct to only allow one row with 'NULL' in a unique index. This flag is enabled for Derby, Oracle, MSSQLServer, and HSQLDB.
@changelog_1305_li
@changelog_1310_li
Linked tables: To view the statements that are executed against the target table, set the trace level to 3.
@changelog_1306_li
@changelog_1311_li
RunScript tool: new options to show and check the results of queries.
@changelog_1307_li
@changelog_1312_li
Deadlocks are now detected. One transaction is rolled back automatically.
@changelog_1308_li
@changelog_1313_li
The Lucene fulltext index was always re-created when opening a database with fulltext index enabled.
@changelog_1309_li
@changelog_1314_li
Support for overloaded Java methods. A user defined function can now be bound to multiple Java methods, if the Java methods have the same name but a different number of parameters. Thanks to Gary Tong for providing a patch!
@download_1000_h1
...
...
@@ -2276,7 +2291,7 @@ In addition to that, running out of memory should be avoided. In older versions,
Areas that are not fully tested:
@faq_1044_li
Platforms other than Windows XP, Linux, Mac OS X, or JVMs other than Sun 1.4 - 1.6
Platforms other than Windows XP, Linux, Mac OS X, or JVMs other than Sun 1.5 or 1.6
@faq_1045_li
The features AUTO_SERVER and AUTO_RECONNECT
...
...
@@ -3959,7 +3974,7 @@ By default, this database uses its own native 'trace' facility. This facility is
SLF4J
@features_1543_p
is a simple facade for various logging APIs and allows to plug in the desired implementation at deployment time. SLF4J supports implementations such as Logback, Log4j, Jakarta Commons Logging (JCL), JDK 1.4 logging, x4juli, and Simple Log.
is a simple facade for various logging APIs and allows to plug in the desired implementation at deployment time. SLF4J supports implementations such as Logback, Log4j, Jakarta Commons Logging (JCL), Java logging, x4juli, and Simple Log.
@features_1544_p
To enable SLF4J, set the file trace level to 4 in the database URL:
...
...
@@ -4400,7 +4415,7 @@ Windows XP, Mac OS X, or Linux
Recommended Windows file system: NTFS (FAT32 supports files up to 4 GB)
@installation_1009_li
Sun JDK 1.4 or newer
Sun JDK 1.5 or newer
@installation_1010_li
Mozilla Firefox 1.5 or newer
...
...
@@ -4409,7 +4424,7 @@ Mozilla Firefox 1.5 or newer
Supported Platforms
@installation_1012_p
As this database is written in Java, it can run on many different platforms. It is tested with Java 1.4, 1.5, and 1.6 but can also be compiled to native code using GCJ. The source code does not use features of Java 1.5. Currently, the database is developed and tested on Windows XP and Mac OS X using the Sun JDK 1.5, but it also works in many other operating systems and using other Java runtime environments.
As this database is written in Java, it can run on many different platforms. It is tested with Java 1.5 and 1.6 but can also be compiled to native code using GCJ. The source code does not use features of Java 1.6. Currently, the database is developed and tested on Windows XP and Mac OS X using the Sun JDK 1.5, but it also works in many other operating systems and using other Java runtime environments.
@installation_1013_h2
Installing the Software
...
...
@@ -5387,345 +5402,351 @@ Java Simon
Simple Monitoring API.
@links_1107_a
jBPM
JBoss jBPM
@links_1108_p
A platform for executable process languages ranging from business process management (BPM) over workflow to service orchestration.
@links_1109_a
JGeocoder
JBoss Jopr
@links_1110_p
Free Java geocoder. Geocoding is the process of estimating a latitude and longitude for a given location.
An enterprise management solution for JBoss middleware projects and other application technologies.
@links_1111_a
JGrass
JGeocoder
@links_1112_p
Java Geographic Resources Analysis Support System. Free, multi platform, open source GIS based on the GIS framework of uDig.
Free Java geocoder. Geocoding is the process of estimating a latitude and longitude for a given location.
@links_1113_a
Jena
JGrass
@links_1114_p
Java framework for building Semantic Web applications.
Java Geographic Resources Analysis Support System. Free, multi platform, open source GIS based on the GIS framework of uDig.
@links_1115_a
JMatter
Jena
@links_1116_p
Framework for constructing workgroup business applications based on the Naked Objects Architectural Pattern.
Java framework for building Semantic Web applications.
@links_1117_a
JotBot
JMatter
@links_1118_p
Records your day at user defined intervals.
Framework for constructing workgroup business applications based on the Naked Objects Architectural Pattern.
@links_1119_a
JPOX
JotBot
@links_1120_p
Java persistent objects.
Records your day at user defined intervals.
@links_1121_a
Liftweb
JPOX
@links_1122_p
A Scala-based, secure, developer friendly web framework.
Java persistent objects.
@links_1123_a
LiquiBase
Liftweb
@links_1124_p
A tool to manage database changes and refactorings.
A Scala-based, secure, developer friendly web framework.
@links_1125_a
Luntbuild
LiquiBase
@links_1126_p
Build automation and management tool.
A tool to manage database changes and refactorings.
@links_1127_a
localdb
Luntbuild
@links_1128_p
A tool that locates the full file path of the folder containing the database files.
Build automation and management tool.
@links_1129_a
Magnolia
localdb
@links_1130_p
Microarray Data Management and Export System for PFGRC (Pathogen Functional Genomics Resource Center) Microarrays.
A tool that locates the full file path of the folder containing the database files.
@links_1131_a
MiniConnectionPoolManager
Magnolia
@links_1132_p
A lightweight standalone JDBC connection pool manager.
Microarray Data Management and Export System for PFGRC (Pathogen Functional Genomics Resource Center) Microarrays.
@links_1133_a
Mr. Persister
MiniConnectionPoolManager
@links_1134_p
Simple, small and fast object relational mapping.
A lightweight standalone JDBC connection pool manager.
@links_1135_a
Myna Application Server
Mr. Persister
@links_1136_p
Java web app that provides dynamic web content and Java libraries access from JavaScript.
Simple, small and fast object relational mapping.
@links_1137_a
MyTunesRss
Myna Application Server
@links_1138_p
MyTunesRSS lets you listen to your music wherever you are.
Java web app that provides dynamic web content and Java libraries access from JavaScript.
@links_1139_a
NCGC CurveFit
MyTunesRss
@links_1140_p
MyTunesRSS lets you listen to your music wherever you are.
@links_1141_a
NCGC CurveFit
@links_1142_p
From: NIH Chemical Genomics Center, National Institutes of Health, USA. An open source application in the life sciences research field. This application handles chemical structures and biological responses of thousands of compounds with the potential to handle million+ compounds. It utilizes an embedded H2 database to enable flexible query/retrieval of all data including advanced chemical substructure and similarity searching. The application highlights an automated curve fitting and classification algorithm that outperforms commercial packages in the field. Commercial alternatives are typically small desktop software that handle a few dose response curves at a time. A couple of commercial packages that do handle several thousand curves are very expensive tools (>60k USD) that require manual curation of analysis by the user; require a license to Oracle; lack advanced query/retrieval; and the ability to handle chemical structures.
@links_1141_a
@links_1143_a
Nuxeo
@links_1142_p
@links_1144_p
Standards-based, open source platform for building ECM applications.
@links_1143_a
@links_1145_a
nWire
@links_1144_p
@links_1146_p
Eclipse plug-in which expedites Java development. It's main purpose is to help developers find code quicker and easily understand how it relates to the rest of the application, thus, understand the application structure.
@links_1145_a
@links_1147_a
Ontology Works
@links_1146_p
@links_1148_p
This company provides semantic technologies including deductive information repositories (the Ontology Works Knowledge Servers), semantic information fusion and semantic federation of legacy databases, ontology-based domain modeling, and management of the distributed enterprise.
@links_1147_a
@links_1149_a
Ontoprise OntoBroker
@links_1148_p
@links_1150_p
SemanticWeb-Middleware. It supports all W3C Semantic Web recommendations: OWL, RDF, RDFS, SPARQL, and F-Logic.
@links_1149_a
@links_1151_a
Open Anzo
@links_1150_p
@links_1152_p
Semantic Application Server.
@links_1151_a
@links_1153_a
OpenGroove
@links_1152_p
@links_1154_p
OpenGroove is a groupware program that allows users to synchronize data.
@links_1153_a
@links_1155_a
OpenSocial Development Environment (OSDE)
@links_1154_p
@links_1156_p
Development tool for OpenSocial application.
@links_1155_a
@links_1157_a
Orion
@links_1156_p
@links_1158_p
J2EE Application Server.
@links_1157_a
@links_1159_a
P5H2
@links_1158_p
@links_1160_p
A library for the <a href="http://www.processing.org">Processing</a> programming language and environment.
@links_1159_a
@links_1161_a
Phase-6
@links_1160_p
@links_1162_p
A computer based learning software.
@links_1161_a
@links_1163_a
Pickle
@links_1162_p
@links_1164_p
Pickle is a Java library containing classes for persistence, concurrency, and logging.
@links_1163_a
@links_1165_a
Piman
@links_1164_p
@links_1166_p
Water treatment projects data management.
@links_1165_a
@links_1167_a
PolePosition
@links_1166_p
@links_1168_p
Open source database benchmark.
@links_1167_a
@links_1169_a
Poormans
@links_1168_p
@links_1170_p
Very basic CMS running as a SWT application and generating static html pages.
@links_1169_a
@links_1171_a
Railo
@links_1170_p
@links_1172_p
Railo is an alternative engine for the Cold Fusion Markup Language, that compiles code programmed in CFML into Java bytecode and executes it on a servlet engine.
@links_1171_a
@links_1173_a
Razuna
@links_1172_p
@links_1174_p
Open source Digital Asset Management System with integrated Web Content Management.
@links_1173_a
@links_1175_a
RIFE
@links_1174_p
@links_1176_p
A full-stack web application framework with tools and APIs to implement most common web features.
@links_1175_a
@links_1177_a
Rutema
@links_1176_p
@links_1178_p
Rutema is a test execution and management tool for heterogeneous development environments written in Ruby.
@links_1177_a
@links_1179_a
Sava
@links_1178_p
@links_1180_p
Open-source web-based content management system.
@links_1179_a
@links_1181_a
Scriptella
@links_1180_p
@links_1182_p
ETL (Extract-Transform-Load) and script execution tool.
@links_1181_a
@links_1183_a
Sesar
@links_1182_p
@links_1184_p
Dependency Injection Container with Aspect Oriented Programming.
@links_1183_a
@links_1185_a
SemmleCode
@links_1184_p
@links_1186_p
Eclipse plugin to help you improve software quality.
@links_1185_a
@links_1187_a
SeQuaLite
@links_1186_p
@links_1188_p
A free, light-weight, java data access framework.
@links_1187_a
@links_1189_a
ShapeLogic
@links_1188_p
@links_1190_p
Toolkit for declarative programming, image processing and computer vision.
@links_1189_a
@links_1191_a
Shellbook
@links_1190_p
@links_1192_p
Desktop publishing application.
@links_1191_a
@links_1193_a
Signsoft intelliBO
@links_1192_p
@links_1194_p
Persistence middleware supporting the JDO specification.
@links_1193_a
@links_1195_a
SimpleORM
@links_1194_p
@links_1196_p
Simple Java Object Relational Mapping.
@links_1195_a
@links_1197_a
SymmetricDS
@links_1196_p
@links_1198_p
A web-enabled, database independent, data synchronization/replication software.
@links_1197_a
@links_1199_a
SmartFoxServer
@links_1198_p
@links_1200_p
Platform for developing multiuser applications and games with Macromedia Flash.
@links_1199_a
@links_1201_a
Social Bookmarks Friend Finder
@links_1200_p
@links_1202_p
A GUI application that allows you to find users with similar bookmarks to the user specified (for delicious.com).
@links_1201_a
@links_1203_a
Springfuse
@links_1202_p
@links_1204_p
Code generation For Spring, Spring MVC & Hibernate.
@links_1203_a
@links_1205_a
SQLOrm
@links_1204_p
@links_1206_p
Java Object Relation Mapping.
@links_1205_a
@links_1207_a
StorYBook
@links_1206_p
@links_1208_p
A summary-based tool for novelist and script writers. It helps to keep the overview over the various traces a story has.
@links_1207_a
@links_1209_a
StreamCruncher
@links_1208_p
@links_1210_p
Event (stream) processing kernel.
@links_1209_a
@links_1211_a
Tune Backup
@links_1210_p
@links_1212_p
Easy-to-use backup solution for your iTunes library.
@links_1211_a
@links_1213_a
weblica
@links_1212_p
@links_1214_p
Desktop CMS.
@links_1213_a
@links_1215_a
Web of Web
@links_1214_p
@links_1216_p
Collaborative and realtime interactive media platform for the web.
@links_1215_a
@links_1217_a
Werkzeugkasten
@links_1216_p
@links_1218_p
Minimum Java Toolset.
@links_1217_a
@links_1219_a
VPDA
@links_1218_p
@links_1220_p
View providers driven applications is a Java based application framework for building applications composed from server components - view providers.
@links_1219_a
@links_1221_a
Volunteer database
@links_1220_p
@links_1222_p
A database front end to register volunteers, partnership and donation for a Non Profit organization.
@@ -6731,7 +6752,7 @@ Benchmark Results and Comments
H2
@performance_1240_p
Version 1.0.78 (2008-08-28) was used for the test. For simpler operations, the performance of H2 is about the same as for HSQLDB. For more complex queries, the query optimizer is very important. However H2 is not very fast in every case, certain kind of queries may still be slow. One situation where is H2 is slow is large result sets, because they are buffered to disk if more than a certain number of records are returned. The advantage of buffering is, there is no limit on the result set size. The open/close time is almost fixed, because of the file locking protocol: The engine waits some time after opening a database to ensure the database files are not opened by another process.
Version 1.1.114 (2009-06-01) was used for the test. For simpler operations, the performance of H2 is about the same as for HSQLDB. For more complex queries, the query optimizer is very important. However H2 is not very fast in every case, certain kind of queries may still be slow. One situation where is H2 is slow is large result sets, because they are buffered to disk if more than a certain number of records are returned. The advantage of buffering is, there is no limit on the result set size. The open/close time is almost fixed, because of the file locking protocol: The engine waits some time after opening a database to ensure the database files are not opened by another process.
@performance_1241_h4
HSQLDB
...
...
@@ -6752,13 +6773,13 @@ Version 10.4.2.0 was used for the test. Derby is clearly the slowest embedded da
PostgreSQL
@performance_1247_p
Version 8.3.4 was used for the test. The following options where changed in postgresql.conf: fsync = off, commit_delay = 1000. PostgreSQL is run in server mode. It looks like the base performance is slower than MySQL, the reason could be the network layer. The memory usage number is incorrect, because only the memory usage of the JDBC driver is measured.
Version 8.3.7 was used for the test. The following options where changed in postgresql.conf: fsync = off, commit_delay = 1000. PostgreSQL is run in server mode. It looks like the base performance is slower than MySQL, the reason could be the network layer. The memory usage number is incorrect, because only the memory usage of the JDBC driver is measured.
@performance_1248_h4
MySQL
@performance_1249_p
Version 5.0.67 was used for the test. MySQL was run with the InnoDB backend. The setting innodb_flush_log_at_trx_commit (found in the my.ini file) was set to 0. Otherwise (and by default), MySQL is really slow (around 140 statements per second in this test) because it tries to flush the data to disk for each commit. For small transactions (when autocommit is on) this is really slow. But many use cases use small or relatively small transactions. Too bad this setting is not listed in the configuration wizard, and it always overwritten when using the wizard. You need to change this setting manually in the file my.ini, and then restart the service. The memory usage number is incorrect, because only the memory usage of the JDBC driver is measured.
Version 5.1.34-community was used for the test. MySQL was run with the InnoDB backend. The setting innodb_flush_log_at_trx_commit (found in the my.ini file) was set to 0. Otherwise (and by default), MySQL is really slow (around 140 statements per second in this test) because it tries to flush the data to disk for each commit. For small transactions (when autocommit is on) this is really slow. But many use cases use small or relatively small transactions. Too bad this setting is not listed in the configuration wizard, and it always overwritten when using the wizard. You need to change this setting manually in the file my.ini, and then restart the service. The memory usage number is incorrect, because only the memory usage of the JDBC driver is measured.
@performance_1250_h4
Firebird
...
...
@@ -8548,78 +8569,6 @@ HSQLDB (did) support this: select id i from test where i<0 (other databases d
@roadmap_1391_li
String.intern (so that Strings can be compared with ==) will not be used because some VMs have problems when used extensively.
@search_1000_b
Search:
@search_1001_td
Highlight keyword(s)
@search_1002_a
Home
@search_1003_a
Quickstart
@search_1004_a
Installation
@search_1005_a
Tutorial
@search_1006_a
Features
@search_1007_a
Performance
@search_1008_a
Advanced Topics
@search_1009_a
JaQu
@search_1010_a
Download
@search_1011_b
Reference
@search_1012_a
SQL Grammar
@search_1013_a
Functions
@search_1014_a
Data Types
@search_1015_a
Javadoc
@search_1016_a
Docs as PDF (1 MB)
@search_1017_a
Error Analyzer
@search_1018_b
Appendix
@search_1019_a
Build
@search_1020_a
History & Roadmap
@search_1021_a
Links
@search_1022_a
FAQ
@search_1023_a
License
@sourceError_1000_h1
Online Error Analyzer
...
...
@@ -8741,7 +8690,7 @@ Windows
Click [Start], [All Programs], [H2], and [H2 Console (Command Line)]
@tutorial_1027_td
When using the Sun JDK 1.4 or 1.5, a window with the title 'H2 Console ' should appear. When using the Sun JDK 1.6, an icon will be added to the system tray:
When using the Sun JDK 1.5, a window with the title 'H2 Console ' should appear. When using the Sun JDK 1.6, an icon will be added to the system tray:
@tutorial_1028_td
If you don't get the window and the system tray icon, then maybe Java is not installed correctly (in this case, try another way to start the application). A browser window should open and point to the Login page at http://localhost:8082 .
#A Java Runtime Environment (JRE) version 1.4 or higher is required to run this database.
#A Java Runtime Environment (JRE) version 1.5 or higher is required to run this database.
@build_1013_p
#To build the database executables, the following software stack was used. Newer version or compatible software works too.
...
...
@@ -1003,7 +1003,7 @@ Maven 2 の利用
#Mac OS X and Windows XP
@build_1015_a
#Sun JDK Version 1.4, 1.5, and 1.6
#Sun JDK Version 1.5 and 1.6
@build_1016_a
#Eclipse Version 3.4
...
...
@@ -1033,7 +1033,7 @@ Maven 2 の利用
ソフトウェアのビルド
@build_1025_p
#You need to install a JDK, for example the Sun JDK version 1.4, 1.5 or 1.6. Ensure that Java binary directory is included in the PATH environment variable, and that the environment variable JAVA_HOME points to your Java installation. On the command line, go to the directory h2 and execute the following command:
#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 PATH environment variable, and that the environment variable JAVA_HOME points to your Java installation. On the command line, go to the directory h2 and execute the following command:
@build_1026_p
#For Linux and OS X, use <code>./build.sh</code> instead of <code>build</code> .
...
...
@@ -1045,7 +1045,7 @@ Maven 2 の利用
#Switching the Source Code
@build_1029_p
#By default the source code uses Java 1.5 features, however Java 1.4 and 1.5 are supported as well. To switch the source code to the install version of Java, run:
#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 install version of Java, run:
@build_1030_h2
#Build Targets
...
...
@@ -1114,7 +1114,7 @@ Centralリポジトリの利用
#If you like to provide patches, please consider the following guidelines to simplify merging them:
@build_1052_li
#Only use Java 1.4 features (do not use Java 1.5 or 1.6) (see Environment).
#Only use Java 1.5 features (do not use Java 1.6) (see Environment).
@build_1053_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> .
...
...
@@ -1174,927 +1174,942 @@ Centralリポジトリの利用
#Next Version (unreleased)
@changelog_1002_li
#-
#The RunScript tool and SQL statement did not work with the compression method LZF.
@changelog_1003_h2
#Version 1.1.114 (2009-06-01)
@changelog_1003_li
#Fulltext search: searching for NULL or an empty string threw an exception.
@changelog_1004_li
#ResultSetMetaData.getColumnClassName returned the wrong class for CLOB and BLOB columns.
#Lucene fulltext search: FTL_DROP_ALL did not drop the triggers.
@changelog_1005_li
#Fulltext search: Data is no longer deleted and re-inserted if the indexed columns didn't change.
#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_1006_li
#In some situations, an ArrayIndexOutOfBoundsException was thrown when adding rows. This was caused by a bug in the b-tree code.
#Data types: LONG is now an alias for BIGINT.
@changelog_1007_li
#More bugs in the server-less multi-connection mode have been fixed.
@changelog_1008_h2
#Version 1.1.114 (2009-06-01)
@changelog_1009_li
#ResultSetMetaData.getColumnClassName returned the wrong class for CLOB and BLOB columns.
@changelog_1010_li
#Fulltext search: Data is no longer deleted and re-inserted if the indexed columns didn't change.
@changelog_1011_li
#In some situations, an ArrayIndexOutOfBoundsException was thrown when adding rows. This was caused by a bug in the b-tree code.
@changelog_1012_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_1008_li
@changelog_1013_li
#The Recover tool did not always work when the database contains referential integrity constraints.
@changelog_1009_li
@changelog_1014_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_1010_h2
@changelog_1015_h2
#Version 1.1.113 (2009-05-21)
@changelog_1011_li
@changelog_1016_li
#Shell tool: the built-in commands EXIT, HELP, ?, LIST, and so on didn't work with a semicolon at the end.
@changelog_1012_li
@changelog_1017_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_1013_li
@changelog_1018_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_1014_li
@changelog_1019_li
#Identifiers with a digit and then a dollar sign didn't work. Example: A1$B.
@changelog_1015_li
@changelog_1020_li
#MS SQL Server compatibility: support for linked tables with NVARCHAR, NCHAR, NCLOB, and LONGNVARCHAR.
@changelog_1016_li
@changelog_1021_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_1017_li
@changelog_1022_li
#Calling execute() or prepareStatement() with null as the SQL statement now throws an exception.
@changelog_1018_li
@changelog_1023_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_1019_li
@changelog_1024_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_1020_li
@changelog_1025_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_1021_h2
@changelog_1026_h2
#Version 1.1.112 (2009-05-01)
@changelog_1022_li
@changelog_1027_li
#JdbcPreparedStatement.toString() could throw a NullPointerException.
#Connection pool: the default login timeout is now 5 minutes.
@changelog_1025_li
@changelog_1030_li
#After truncating tables, opening large databases could become slow because indexes were always re-built unnecessarily when opening.
@changelog_1026_li
@changelog_1031_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_1027_li
@changelog_1032_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_1028_li
@changelog_1033_li
#Improved error message when the .lock.db file modification time is in the future.
@changelog_1029_li
@changelog_1034_li
#The MERGE statement now returns 0 as the generated key if the row was updated.
@changelog_1030_li
@changelog_1035_li
#Running code coverage is now automated.
@changelog_1031_li
@changelog_1036_li
#A file system implementation can now be registered using FileSystem.register.
@changelog_1032_li
@changelog_1037_li
#The database file system is no longer included in the jar file, it moved to the test section.
@changelog_1033_h2
@changelog_1038_h2
#Version 1.1.111 (2009-04-10)
@changelog_1034_li
@changelog_1039_li
#In-memory databases can now run inside the Google App Engine.
@changelog_1035_li
@changelog_1040_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_1036_li
@changelog_1041_li
#The wrong exception was thrown when using unquoted text for the SQL statements COMMENT, ALTER USER, and SET PASSWORD.
@changelog_1037_li
@changelog_1042_li
#The built-in connection pool did not roll back transactions and enable autocommit enabled after closing a connection.
@changelog_1038_li
@changelog_1043_li
#Sometimes a StackOverflow occurred when checking for deadlock. See also http://code.google.com/p/h2database/issues/detail?id=61
@changelog_1039_li
@changelog_1044_li
#The Shell tool no longer truncates results with only one column, and displays a message if data was truncated.
@changelog_1040_h2
@changelog_1045_h2
#Version 1.1.110 (2009-04-03)
@changelog_1041_li
@changelog_1046_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_1042_li
@changelog_1047_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_1043_li
@changelog_1048_li
#The data type of a SUBSTRING method was wrong.
@changelog_1044_li
@changelog_1049_li
#ResultSet.findColumn and get methods with column label parameters now also check for matching column names (like most databases except MySQL).
@changelog_1045_li
@changelog_1050_li
#H2 Console: the browser system property now supports a list of arguments. Example: java -Dh2.browser="open,-a,Safari,%url" ...
@changelog_1046_li
@changelog_1051_li
#Improved Javadoc navigation (similar to Scaladoc).
@changelog_1047_li
@changelog_1052_li
#H2 Console: auto-complete of identifiers did not work correctly for H2 databases in MySQL mode.
@changelog_1048_li
@changelog_1053_li
#DISTINCT and GROUP BY on a CLOB column was broken.
@changelog_1049_li
@changelog_1054_li
#The FTP server moved to the tools section and is no longer included in the h2*.jar file.
@changelog_1050_li
@changelog_1055_li
#Improved error message for unsupported features: now the message says what exactly is not supported.
@changelog_1051_li
@changelog_1056_li
#Improved OSGi support.
@changelog_1052_li
@changelog_1057_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_1053_li
@changelog_1058_li
#The API of the tools changed a bit (each tool now returns an exit code).
@changelog_1054_li
@changelog_1059_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_1055_li
@changelog_1060_li
#CREATE TABLE: improved compatibility (support for UNIQUE NOT NULL).
@changelog_1056_li
@changelog_1061_li
#DatabaseMetaData.getSQLKeywords now returns the correct list.
@changelog_1057_li
@changelog_1062_li
#Deterministic user defined functions did not work when the parameter was a column. Fixed.
@changelog_1058_li
@changelog_1063_li
#JdbcConnectionPool.setLoginTimeout with 0 now uses the default timeout.
@changelog_1059_li
@changelog_1064_li
#Creating a JdbcConnectionPool has been simplified a bit.
@changelog_1060_li
@changelog_1065_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_1061_li
@changelog_1066_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_1062_li
@changelog_1067_li
#Linked tables to SQLite database can now be created.
@changelog_1063_li
@changelog_1068_li
#Nested IN(IN(...)) didn't work.
@changelog_1064_li
@changelog_1069_li
#NIO storage: the nio: prefix was using memory mapped files instead of FileChannel.
@changelog_1065_h2
@changelog_1070_h2
#Version 1.1.109 (2009-03-14)
@changelog_1066_li
@changelog_1071_li
#The optimization for IN(...) is now only used if comparing a column with an index.
@changelog_1067_li
@changelog_1072_li
#User defined functions can now be deterministic (see CREATE ALIAS documentation).
@changelog_1068_li
@changelog_1073_li
#Multiple nested queries in the FROM clause with parameters did not always work.
@changelog_1069_li
@changelog_1074_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_1070_li
@changelog_1075_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_1071_li
@changelog_1076_li
#The functions BITOR, BITAND, BITXOR, and MOD now accept and return BIGINT instead of INT.
@changelog_1072_li
@changelog_1077_li
#Could not use the same linked table multiple times in the same query.
@changelog_1073_li
@changelog_1078_li
#Bugs in the server-less multi-connection mode have been fixed.
@changelog_1074_li
@changelog_1079_li
#Column names could not be named "UNIQUE" (with the quotes).
@changelog_1075_li
@changelog_1080_li
#New system function TRANSACTION_ID() to get the current transaction identifier for a session.
@changelog_1076_h2
@changelog_1081_h2
#Version 1.1.108 (2009-02-28)
@changelog_1077_li
@changelog_1082_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_1078_li
@changelog_1083_li
#JdbcConnectionPool: it was possible to set a negative connection pool size.
@changelog_1079_li
@changelog_1084_li
#Fulltext search did not support table names with a backslash.
@changelog_1080_li
@changelog_1085_li
#The internal IntArray class did not work correctly when initialized with a zero length array.
@changelog_1081_li
@changelog_1086_li
#The H2 Console web application (war file) did only support ASCII characters. Now UTF-8 is supported.
@changelog_1082_li
@changelog_1087_li
#DATEADD does no longer require that the argument is a timestamp.
@changelog_1083_li
@changelog_1088_li
#The database file locking mechanism didn't work correctly on Mac OS.
@changelog_1084_li
@changelog_1089_li
#Some built-in functions reported the wrong precision, scale, and display size.
@changelog_1085_li
@changelog_1090_li
#MySQL compatibility for CREATE TABLE is improved (UNSIGNED, KEY).
@changelog_1086_li
@changelog_1091_li
#Recovery did not work if there were more than 255 lobs stored as files.
@changelog_1087_li
@changelog_1092_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_1088_li
@changelog_1093_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_1089_li
@changelog_1094_li
#The WebServlet did not close the database when un-deploying the web application.
@changelog_1090_li
@changelog_1095_li
#The exception message of failed INSERT or MERGE statements now includes all values and the row number.
@changelog_1091_li
@changelog_1096_li
#If opening a database failed with an out of memory exception, some files were not closed.
@changelog_1092_li
@changelog_1097_li
#Optimizer: the expected runtime calculation was incorrect. The fixed calculation should give slightly better query plans when using many joins.
@changelog_1093_li
@changelog_1098_li
#Improved exception message when connecting to a just started server fails.
@changelog_1094_li
@changelog_1099_li
#Connection.isValid is a bit faster.
@changelog_1095_li
@changelog_1100_li
#H2 Console: The autocomplete feature has been improved a bit. It can now better parse conditions.
@changelog_1096_li
@changelog_1101_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_1097_h2
@changelog_1102_h2
#Version 1.1.107 (2009-01-24)
@changelog_1098_li
@changelog_1103_li
#Some DatabaseMetaData operations did not work for non-admin users for versions 1.1.x.
@changelog_1099_li
@changelog_1104_li
#The MySQL compatibility extension fromUnixTime now used the English locale.
@changelog_1100_li
@changelog_1105_li
#When using LOG=2 and repeatedly updating the last row rows of a table, the index file grew quickly.
@changelog_1101_li
@changelog_1106_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_1102_li
@changelog_1107_li
#Enabling the trace mechanism by creating a specially named file is no longer supported.
@changelog_1103_h2
@changelog_1108_h2
#Version 1.1.106 (2009-01-04)
@changelog_1104_li
@changelog_1109_li
#Statement.setQueryTimeout did not work correctly for some statements.
@changelog_1105_li
@changelog_1110_li
#CREATE DOMAIN: Built-in data types can now only be changed if no tables exist.
@changelog_1106_li
@changelog_1111_li
#Linked tables: a workaround for Oracle DATE columns has been implemented.
@changelog_1107_li
@changelog_1112_li
#DatabaseMetaData.getPrimaryKeys: The column PK_NAME now contains the constraint name instead of the index name (compatibility for PostgreSQL and Derby).
@changelog_1108_li
@changelog_1113_li
#Using IN(..) inside a IN(SELECT..) did not always work.
@changelog_1109_li
@changelog_1114_li
#Views with IN(..) that used a view itself did not work.
@changelog_1110_li
@changelog_1115_li
#Union queries with LIMIT or ORDER BY that are used in a view or subquery did not work.
@changelog_1111_li
@changelog_1116_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_1112_li
@changelog_1117_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_1113_li
@changelog_1118_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_1114_h2
@changelog_1119_h2
#Version 1.1.105 (2008-12-19)
@changelog_1115_li
@changelog_1120_li
#The setting STORAGE=TEXT is no longer supported.
@changelog_1116_li
@changelog_1121_li
#Deleting a database using the tool DeleteDbFiles deleted LOB files of other databases in the same directory.
@changelog_1117_li
@changelog_1122_li
#When used in a subquery, LIKE and IN(..) did not work correctly sometimes.
@changelog_1118_li
@changelog_1123_li
#The fulltext search documentation has been improved.
@changelog_1119_li
@changelog_1124_li
#ARRAY_GET returned the wrong data type (ARRAY). Now it returns VARCHAR.
@changelog_1120_li
@changelog_1125_li
#Natural join: the joined columns are not repeated any more when using SELECT *.
@changelog_1121_li
@changelog_1126_li
#User defined aggregate functions: the method getType expected internal data types instead of SQL types.
@changelog_1122_li
@changelog_1127_li
#User defined aggregate functions did not work if there was no group by expression.
@changelog_1123_li
@changelog_1128_li
#MySQL compatibility: support for := assignment as in @sum:=@sum+x
@changelog_1124_li
@changelog_1129_li
#INSERT INTO TEST(SELECT * FROM TEST) is now supported.
@changelog_1125_li
@changelog_1130_li
#Each session threw an invisible exception when garbage collected.
@changelog_1126_li
@changelog_1131_li
#Foreign key constraints that refer to a quoted column did not work.
@changelog_1127_li
@changelog_1132_li
#New meta data column INFORMATION_SCHEMA.TABLES.LAST_MODIFICATION to get the table modification counter.
@changelog_1128_li
@changelog_1133_li
#Shell: line comments didn't work correctly.
@changelog_1129_li
@changelog_1134_li
#H2 Console: Columns are now listed for up to 500 tables instead of 100.
@changelog_1130_li
@changelog_1135_li
#H2 Console: Cmd+Enter executes the current statement, Alt+Space for autocomplete.
@changelog_1131_li
@changelog_1136_li
#JaQu: the maximum length of a column can now be defined using maxLength. For an example, see Product.java (maxLength(category, 255)).
@changelog_1132_li
@changelog_1137_li
#R&\#305;dvan A&\#287;ar has completed the Turkish translation of the H2 Console. Thanks a lot!
@changelog_1133_h2
@changelog_1138_h2
#Version 1.1.104 (2008-11-28)
@changelog_1134_li
@changelog_1139_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_1135_li
@changelog_1140_li
#JaQu: tables are now auto-created when running a query.
@changelog_1136_li
@changelog_1141_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_1137_li
@changelog_1142_li
#The function SUM could overflow when using large values. It returns now a data type that is safe.
@changelog_1138_li
@changelog_1143_li
#The function AVG could overflow when using large values. Fixed.
@changelog_1139_li
@changelog_1144_li
#The emergency reserve file has been removed. It didn't provide an appropriate solution for the problem. It is still possible for an application to detect and deal with the low disk space problem (deleting temporary files for example) using DatabaseEventListener.diskSpaceIsLow, but this method is now always called with stillAvailable=0.
@changelog_1140_li
@changelog_1145_li
#Build: JAVA_HOME is now automatically detected on Mac OS X.
@changelog_1141_li
@changelog_1146_li
#Testing for local connections was very slow on some systems.
@changelog_1142_li
@changelog_1147_li
#The cache memory usage calculation is more conservative.
@changelog_1143_li
@changelog_1148_li
#Allocating space got slower and slower the larger the database.
@changelog_1144_li
@changelog_1149_li
#ALTER TABLE ALTER COLUMN could throw the wrong exception in the last version (Table not found).
@changelog_1145_li
@changelog_1150_li
#Updatable result sets: the key columns can now be updated.
@changelog_1146_li
@changelog_1151_li
#The H2DatabaseProvider for ActiveObjects is now included in the tools section.
@changelog_1147_li
@changelog_1152_li
#The H2Platform for Oracle Toplink Essential has been improved a bit.
@changelog_1148_li
@changelog_1153_li
#The Windows service to start H2 didn't work in version 1.1.
@changelog_1149_li
@changelog_1154_li
#File systems with a maximum file size (for example FAT) are now supported using the file prefix 'split:'. In this case the files are split in parts of 1 GB. Example URL: jdbc:h2:split:~/db/test. If you want to split into parts of 1 MB, use jdbc:h2:split:20:~/db/test (the part size is 1 << x, the default is 30 meaning 1 GB).
@changelog_1150_li
@changelog_1155_li
#The database now tries to detect if the classloader or virtual machine has almost shut down by checking if static final variables are set to null. This should help reduce exceptions when stopping the web application.
@changelog_1151_li
@changelog_1156_li
#Compatibility for MS SQL Server DATEDIFF(YYYY, .., ..)
@changelog_1152_li
@changelog_1157_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_1153_li
@changelog_1158_li
#The interface CloseListener has a new method 'remove' that is called when the trigger is dropped.
@changelog_1154_li
@changelog_1159_li
#Fulltext search: there was a memory leak when creating and dropping fulltext indexes in a loop.
@changelog_1155_h2
@changelog_1160_h2
#Version 1.1.103 (2008-11-07)
@changelog_1156_li
@changelog_1161_li
#Could not order by a formula when the formula was in the group by list but not in the select list.
@changelog_1157_li
@changelog_1162_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_1158_li
@changelog_1163_li
#ALTER TABLE used a lot of memory when using multi-version concurrency.
@changelog_1159_li
@changelog_1164_li
#Referential integrity for in-memory databases didn't work in some cases in version 1.1.102.
@changelog_1160_li
@changelog_1165_li
#New column INFORMATION_SCHEMA.COLUMNS.SEQUENCE_NAME to get the name of the sequence for auto-increment columns.
@changelog_1161_li
@changelog_1166_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_1162_li
@changelog_1167_li
#The Japanese translation has been completed by Masahiro Ikemoto. Thanks a lot!
@changelog_1163_li
@changelog_1168_li
#Improved PostgreSQL compatibility for NEXTVAL and CURRVAL.
@changelog_1164_li
@changelog_1169_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_1165_li
@changelog_1170_li
#New system property h2.browser to set the browser to use.
@changelog_1166_li
@changelog_1171_li
#To start the browser, java.awt.Desktop.browse is now used if available.
@changelog_1167_h2
@changelog_1172_h2
#Version 1.1.102 (2008-10-24)
@changelog_1168_li
@changelog_1173_li
#The French translation of the H2 Console has been improved by Olivier Parent. Thanks a lot!
@changelog_1169_li
@changelog_1174_li
#There was a memory leak when creating and dropping tables and indexes in a loop (persistent database only).
@changelog_1170_li
@changelog_1175_li
#SET LOG 2 was not effective if executed after opening the database.
@changelog_1171_li
@changelog_1176_li
#Translating the H2 Console is now simpler.
@changelog_1172_li
@changelog_1177_li
#Common exception (error code 23*) are no longer written to the .trace.db file by default.
@changelog_1173_li
@changelog_1178_li
#In-memory databases don't write LOBs to files any longer.
@changelog_1174_li
@changelog_1179_li
#Self referencing constraints didn't restrict deleting rows that reference itself if there is another row that references it.
@changelog_1175_li
@changelog_1180_li
#ResultSetMetaData.getColumnName now returns the alias name except for columns.
@changelog_1176_li
@changelog_1181_li
#Temporary files are now deleted when the database is closed, even if they were not garbage collected so far.
@changelog_1177_h2
@changelog_1182_h2
#Version 1.1.101 (2008-10-17)
@changelog_1178_li
@changelog_1183_li
#Errors with code 42000 - 42999 are no longer written to the trace file by default.
@changelog_1179_li
@changelog_1184_li
#Queries with more than 10 tables are now faster.
@changelog_1180_li
@changelog_1185_li
#Opening a connection with AUTO_SERVER=TRUE is now fast when the database is already open in another process (less than 0.01 seconds instead of 2 seconds).
@changelog_1181_li
@changelog_1186_li
#IF [NOT] EXISTS is supported for named constraints in ALTER TABLE ... ADD/DROP CONSTRAINT.
@changelog_1182_li
@changelog_1187_li
#The error messages have been translated to Spanish by Dario V. Fassi. Thanks a lot!
@changelog_1183_li
@changelog_1188_li
#Linked tables: the automatic connection sharing didn't work. Actually the system property h2.shareLinkedConnections was working in the opposite direction: it was disabled when set to true. Now it works as expected.
@changelog_1184_li
@changelog_1189_li
#Opening large database is now faster.
@changelog_1185_li
@changelog_1190_li
#New system property h2.socketConnectTimeout, the timeout in milliseconds to connect to a server. The default is 2000 (2 seconds).
@changelog_1186_li
@changelog_1191_li
#The wrong parameters were bound to subqueries with parameters, specially when using IN(SELECT ...) and IN(...).
@changelog_1187_li
@changelog_1192_li
#Unset parameters were not detected when the query was re-compiled.
@changelog_1188_li
@changelog_1193_li
#New functions ISO_YEAR, ISO_WEEK, ISO_DAY_OF_WEEK. Thanks a lot to Robert Rathsack for implementing those!
@changelog_1189_li
@changelog_1194_li
#The date functions DAYOFYEAR, DAYOFMONTH, DAYOFWEEK are now called DAY_OF_YEAR, DAY_OF_MONTH, DAY_OF_WEEK (the old names still work).
@changelog_1190_li
@changelog_1195_li
#An out of memory error while deleting or updating many rows could result in a strange exception.
@changelog_1191_li
@changelog_1196_li
#Linked tables: compatibility with MS SQL Server has been improved.
@changelog_1192_li
@changelog_1197_li
#Renaming tables that have foreign keys with cascade didn't work correctly.
@changelog_1193_li
@changelog_1198_li
#The auto-reconnect feature didn't work when using the auto-server mode. Fixed.
@changelog_1194_li
@changelog_1199_li
#Fulltext search: new method FT_DROP_INDEX.
@changelog_1195_li
@changelog_1200_li
#The optimization to group using an index didn't work in some cases in version 1.1 (see also system property h2.optimizeGroupSorted).
@changelog_1196_li
@changelog_1201_li
#OSGi meta data is included in the manifest file. An OSGi BundleActivator is included: it loads the database driver when starting the bundle, and unloads it when stopping the bundle.
@changelog_1197_li
@changelog_1202_li
#The default value for MAX_MEMORY_UNDO is now 50000.
@changelog_1198_li
@changelog_1203_li
#For alias columns, ResultSetMetaData.getTableName() and getColumnName() now return the real table and column name in the default mode.
@changelog_1199_li
@changelog_1204_li
#In SQL scripts created with SCRIPT TO, schemas are now only created if they don't exist yet.
@changelog_1200_li
@changelog_1205_li
#After re-connecting to a database, the database event listener (if set) is informed about it.
@changelog_1201_li
@changelog_1206_li
#Local temporary tables now support indexes. Thanks a lot to Matt Roy!
@changelog_1202_li
@changelog_1207_li
#RUNSCRIPT no longer uses a temporary file.
@changelog_1203_li
@changelog_1208_li
#New system table INFORMATION_SCHEMA.SESSION_STATE containing the SQL statements that make up the session state. The list currently contains variables (SET @..) and local temporary tables (without data).
@changelog_1204_li
@changelog_1209_li
#After an automatic re-connect, part of the session state stays (the part that is stored in the SESSION_STATE table).
@changelog_1205_li
@changelog_1210_li
#The build didn't work if the directory temp didn't exist before.
@changelog_1206_li
@changelog_1211_li
#New system property h2.maxReconnect (default 3) to limit the number of re-connects for the same SQL statement (this is usually only important for SHUTDOWN).
@changelog_1207_li
@changelog_1212_li
#WHERE .. IN (SELECT ...) could throw a NullPointerException.
@changelog_1208_li
@changelog_1213_li
#Improved Glassfish / Toplink support in H2Platform thanks to Marcio Borges from Brazil. Thanks a lot!
@changelog_1209_h2
@changelog_1214_h2
#Version 1.1.100 (2008-10-04)
@changelog_1210_li
@changelog_1215_li
#In version 1.1, the following system properties are now enabled by default: h2.lobFilesInDirectories, h2.optimizeGroupSorted, h2.optimizeInJoin, h2.shareLinkedConnections
@changelog_1211_li
@changelog_1216_li
#The H2 Console tool now works with the JDBC-ODBC bridge.
@changelog_1212_li
@changelog_1217_li
#The H2 Console tool now supports command line options to start things separately.
@changelog_1213_li
@changelog_1218_li
#Large objects did not work for in-memory databases in server mode in Linux.
@changelog_1214_li
@changelog_1219_li
#Connections from a local address other than 'localhost' were not allowed if remote connections were disabled. This was always a problem, but only got visible in the last release because the server no longer connects to 'localhost' if networked.
@changelog_1215_li
@changelog_1220_li
#The h2console.war can now be built using the Java build.
@changelog_1216_li
@changelog_1221_li
#By default, databases are shared in the same process. For read-only databases this causes unnecessary synchronization, but safes memory. If you want that each connection opens its own database, append ;OPEN_NEW=TRUE to the database URL.
@changelog_1217_li
@changelog_1222_li
#New auto-reconnect feature will cause the JDBC driver to reconnect to the database if the connection is lost. To enable, append ;AUTO_RECONNECT=TRUE to the database URL. This is specially helpful when using AUTO_SERVER. AUTO_SERVER automatically uses auto-reconnect.
@changelog_1218_li
@changelog_1223_li
#CreateCluster: the property 'serverlist' is now called 'serverList'.
@changelog_1219_li
@changelog_1224_li
#The ConvertTraceFile tool could not parse some files because the trace mechanism did not encode prepared statement parameters.
@changelog_1220_li
@changelog_1225_li
#Databases names can now be one character long (the minimum size used to be 2 characters).
@changelog_1221_h2
@changelog_1226_h2
#Version 1.0.79 (2008-09-26)
@changelog_1222_li
@changelog_1227_li
#Linked tables that point to the same database can now share the connection within the same database. Access to the same connection is serialized. To enable this feature, set the system property h2.shareLinkedConnections to true.
@changelog_1223_li
@changelog_1228_li
#Multiple processes can now access the same database without having to explicitly start the server. To do that, append ;AUTO_SERVER=TRUE to the database URL. In this case, the server is started automatically if the connection is in embedded mode, and the server mode is used if a server is running. If the process that opened the first connection is closed, the other client need to reconnect (there is no automatic re-connect so far). Remote connections are allowed, but only to this database.
@changelog_1224_li
@changelog_1229_li
#The server tool now displays the correct IP address if networked.
@changelog_1225_li
@changelog_1230_li
#Can now start a TCP server with port 0 (automatically select a port).
@changelog_1226_li
@changelog_1231_li
#Result sets with just a unique index can now be updated (previously a primary key was required).
@changelog_1227_li
@changelog_1232_li
#LINKED TABLE: the schema name can now be set. When multiple tables exist in different schema, and the schema name is not set, an exception is thrown.
@changelog_1228_li
@changelog_1233_li
#LINKED TABLE: worked around a bug in Oracle with the CHAR data type.
@changelog_1229_li
@changelog_1234_li
#Faster hash code calculation for large binary arrays.
@changelog_1230_li
@changelog_1235_li
#Faster storage re-use algorithm thanks to Greg Dhuse from cleversafe.com.
@changelog_1231_li
@changelog_1236_li
#The database supports the SHOW command for better MySQL and PostgreSQL compatibility.
@changelog_1232_li
@changelog_1237_li
#The H2 Console now abbreviates large texts in results.
@changelog_1233_li
@changelog_1238_li
#Multiple UNION queries could not be used in derived tables.
@changelog_1234_li
@changelog_1239_li
#Linked tables can now be read-only.
@changelog_1235_li
@changelog_1240_li
#Temporary linked tables are now supported.
@changelog_1236_li
@changelog_1241_li
#It was possible to create tables in read-only databases.
@changelog_1237_li
@changelog_1242_li
#SET SCHEMA_SEARCH_PATH is now documented.
@changelog_1238_li
@changelog_1243_li
#SET SCHEMA did not work for views.
@changelog_1239_li
@changelog_1244_li
#Row level locking for MVCC is now enabled. The exception 'Concurrent update in table ...' is still thrown, but only after the lock timeout.
@changelog_1240_li
@changelog_1245_li
#The maximum log file size setting was ignored for large databases.
@changelog_1241_li
@changelog_1246_li
#Multi-Version Concurrency (MVCC) may no longer be used when using the multi-threaded kernel feature (MULTI_THREADED). An exception is thrown when trying to connect with both settings. Additional synchronization is required before those features can be used together.
@changelog_1242_li
@changelog_1247_li
#The data type JAVA_OBJECT could not be used in updatable result sets.
@changelog_1243_li
@changelog_1248_li
#The system property h2.optimizeInJoin did not work correctly.
@changelog_1244_li
@changelog_1249_li
#Conditions such as ID=? AND ID>? were slow.
@changelog_1245_h2
@changelog_1250_h2
#Version 1.0.78 (2008-08-28)
@changelog_1246_li
@changelog_1251_li
#The documentation no longer uses a frameset (except the Javadocs).
@changelog_1247_li
@changelog_1252_li
#When using DB_CLOSE_DELAY, sometimes a NullPointerException is thrown when the database is opened almost at the same time as it is closed automatically. Thanks a lot to Dmitry Pekar for finding this!
@changelog_1248_li
@changelog_1253_li
#Java methods with variable number of parameters can now be used (for Java 1.5 or newer).
@changelog_1249_li
@changelog_1254_li
#The Japanese translation has been improved by Masahiro Ikemoto. Thanks a lot!
@changelog_1250_li
@changelog_1255_li
#The H2 Console replaced an empty user name with a single space.
@changelog_1251_li
@changelog_1256_li
#The build target 'build jarSmall' now includes the embedded database.
@changelog_1252_li
@changelog_1257_li
#JdbcDataSource now keeps the password in a char array where possible.
@changelog_1253_li
@changelog_1258_li
#ResultSet.absolute did not always work with large result sets.
@changelog_1254_li
@changelog_1259_li
#Column aliases can now be used in GROUP BY and HAVING.
@changelog_1255_li
@changelog_1260_li
#Jason Brittain has contributed MySQL date functions. Thanks a lot! They are not in the h2.jar file currently, but in src/tools/org/h2/mode/FunctionsMySQL.java. To install, add this class to the classpath and call FunctionsMySQL.register(conn) in the Java code.
@changelog_1256_h2
@changelog_1261_h2
#Version 1.0.77 (2008-08-16)
@changelog_1257_li
@changelog_1262_li
#JaQu is now using prepared statements and supports Date, Time, Timestamp.
@changelog_1258_li
@changelog_1263_li
#When using remote in-memory databases, large LOB objects did not work.
@changelog_1259_li
@changelog_1264_li
#Timestamp columns such as TIMESTAMP(6) were not compatible to other database.
@changelog_1260_li
@changelog_1265_li
#Opening a large database was slow if there was a problem opening the previous time.
@changelog_1261_li
@changelog_1266_li
#NOT IN(SELECT ...) was incorrect if the subquery returns no rows.
@changelog_1262_li
@changelog_1267_li
#CREATE TABLE AS SELECT did not work correctly in the multi-version concurrency mode.
@changelog_1263_li
@changelog_1268_li
#Support a comma before closing a list, as in: create table test(id int,)
@changelog_1264_li
@changelog_1269_li
#MySQL compatibility: linked tables had lower case column names on some systems.
@changelog_1265_li
@changelog_1270_li
#DB2 compatibility: the DB2 fetch-first-clause is supported.
@changelog_1266_li
@changelog_1271_li
#Oracle compatibility: old style outer join syntax using (+) did work correctly sometimes.
@changelog_1267_li
@changelog_1272_li
#ResultSet.setFetchSize is now supported.
@changelog_1268_li
@changelog_1273_li
#It has been reported that when using Install4j on some Linux systems and enabling the 'pack200' option, the h2.jar becomes corrupted by the install process, causing application failure. A workaround is to add an empty file h2.jar.nopack next to the h2.jar file. The reason for this problem is not known.
@changelog_1269_h2
@changelog_1274_h2
#Version 1.0.76 (2008-07-27)
@changelog_1270_li
@changelog_1275_li
#The comment of a domain (user defined data type) is now used as the default column comment when creating a column with this domain.
@changelog_1271_li
@changelog_1276_li
#Invalid database names are now detected and a better error message is thrown.
@changelog_1272_li
@changelog_1277_li
#ResultSetMetaData.getColumnClassName now returns the correct class name for BLOB and CLOB.
@changelog_1273_li
@changelog_1278_li
#Fixed the Oracle mode: Oracle allows multiple rows only where all columns of the unique index are NULL.
@changelog_1274_li
@changelog_1279_li
#There is a problem with Hibernate when using Boolean columns. A patch for Hibernate has been submitted at http://opensource.atlassian.com/projects/hibernate/browse/HHH-3401
@changelog_1275_li
@changelog_1280_li
#ORDER BY on tableName.columnName didn't work correctly if the column name was also used as an alias.
@changelog_1276_li
@changelog_1281_li
#H2 Console: The progress display when opening a database has been improved.
@changelog_1277_li
@changelog_1282_li
#The error message when the server doesn't start has been improved.
@changelog_1278_li
@changelog_1283_li
#Key values can now be changed in updatable result sets.
@changelog_1279_li
@changelog_1284_li
#Changes in updatable result sets are now visible even when resetting the result set.
@changelog_1280_li
@changelog_1285_li
#Temporary files were sometimes deleted too late when executing large insert, update, or delete operations.
@changelog_1281_li
@changelog_1286_li
#The database file was growing after deleting many rows, and after large update operations.
@changelog_1282_h2
@changelog_1287_h2
#Version 1.0.75 (2008-07-14)
@changelog_1283_li
@changelog_1288_li
#Multi version concurrency (MVCC): when a row was updated or deleted, but this change was rolled back, the row was not visible by other sessions if no index was used to access it. Fixed.
@changelog_1284_li
@changelog_1289_li
#Views with multiple joined tables (where one was an outer join) couldn't be used in some cases. Fixed.
@changelog_1285_li
@changelog_1290_li
#The CSVREAD method did not process NULL correctly when using a whitespace field separator.
@changelog_1286_li
@changelog_1291_li
#Fixed the Oracle mode: Oracle allows multiple rows with NULL in a unique index.
@changelog_1287_li
@changelog_1292_li
#Running out of memory could result in incomplete transactions or corrupted databases. Fixed.
@changelog_1288_li
@changelog_1293_li
#When using order by in a query that uses the same table multiple times, the order could be incorrect. Fixed.
@changelog_1289_li
@changelog_1294_li
#Referential constraint checking improvement: now the constraint is only checked if the key column values change.
@changelog_1290_li
@changelog_1295_li
#Some database metadata calls returned the wrong data type for DATA_TYPE columns.
@changelog_1291_li
@changelog_1296_li
#The Lucene fulltext index was empty when opening a database with fulltext index enabled, and re-indexing it didn't work. Fixed.
@changelog_1292_li
@changelog_1297_li
#The character '$' could not be used in identifier names (table name, column names and so on). Fixed.
@changelog_1293_li
@changelog_1298_li
#The new method org.h2.tools.Server.startWebServer(conn) starts the H2 Console to inspect a database while debugging.
@changelog_1294_li
@changelog_1299_li
#Stopping a WebServer didn't always work. Fixed.
@changelog_1295_h2
@changelog_1300_h2
#Version 1.0.74 (2008-06-21)
@changelog_1296_li
@changelog_1301_li
#Work on row level locking has been started (but there is nothing usable yet).
@changelog_1297_li
@changelog_1302_li
#JaQu (Java Query), a tool similar to LINQ (Language Integrated Query; from Microsoft) is now included under src/tools/org/h2/jaqu. A small sample application is included under src/test/org/h2/test/jaqu.
@changelog_1298_li
@changelog_1303_li
#The source code is now switched to Java 1.6 by default. To switch back to Java 1.4, run 'build compile'. The h2.jar file is still Java 1.4.
@changelog_1299_li
@changelog_1304_li
#The ChangePassword tool is now called ChangeFileEncryption.
@changelog_1300_li
@changelog_1305_li
#It is no longer allowed to create columns with the data type NULL. Also, it is no longer allowed to convert a column to the data type NULL. This was possible before but caused data loss.
@changelog_1301_li
@changelog_1306_li
#When using computed columns or default values with a different data type than the column data type, a class cast exception could occur. Fixed.
@changelog_1302_li
@changelog_1307_li
#Opening databases larger than 1 GB was sometimes very slow if a lot of data was deleted previously. Fixed.
@changelog_1303_li
@changelog_1308_li
#RUNSCRIPT could throw a NullPointerException if the script name was an expression.
@changelog_1304_li
@changelog_1309_li
#Improved compatibility. New compatibility modes for Oracle and Derby. New compatibility flag uniqueIndexNullDistinct to only allow one row with 'NULL' in a unique index. This flag is enabled for Derby, Oracle, MSSQLServer, and HSQLDB.
@changelog_1305_li
@changelog_1310_li
#Linked tables: To view the statements that are executed against the target table, set the trace level to 3.
@changelog_1306_li
@changelog_1311_li
#RunScript tool: new options to show and check the results of queries.
@changelog_1307_li
@changelog_1312_li
#Deadlocks are now detected. One transaction is rolled back automatically.
@changelog_1308_li
@changelog_1313_li
#The Lucene fulltext index was always re-created when opening a database with fulltext index enabled.
@changelog_1309_li
@changelog_1314_li
#Support for overloaded Java methods. A user defined function can now be bound to multiple Java methods, if the Java methods have the same name but a different number of parameters. Thanks to Gary Tong for providing a patch!
#Platforms other than Windows XP, Linux, Mac OS X, or JVMs other than Sun 1.4 - 1.6
#Platforms other than Windows XP, Linux, Mac OS X, or JVMs other than Sun 1.5 or 1.6
@faq_1045_li
#The features AUTO_SERVER and AUTO_RECONNECT
...
...
@@ -3961,7 +3976,7 @@ Javaコード生成
#SLF4J
@features_1543_p
#is a simple facade for various logging APIs and allows to plug in the desired implementation at deployment time. SLF4J supports implementations such as Logback, Log4j, Jakarta Commons Logging (JCL), JDK 1.4 logging, x4juli, and Simple Log.
#is a simple facade for various logging APIs and allows to plug in the desired implementation at deployment time. SLF4J supports implementations such as Logback, Log4j, Jakarta Commons Logging (JCL), Java logging, x4juli, and Simple Log.
@features_1544_p
#To enable SLF4J, set the file trace level to 4 in the database URL:
#As this database is written in Java, it can run on many different platforms. It is tested with Java 1.4, 1.5, and 1.6 but can also be compiled to native code using GCJ. The source code does not use features of Java 1.5. Currently, the database is developed and tested on Windows XP and Mac OS X using the Sun JDK 1.5, but it also works in many other operating systems and using other Java runtime environments.
#As this database is written in Java, it can run on many different platforms. It is tested with Java 1.5 and 1.6 but can also be compiled to native code using GCJ. The source code does not use features of Java 1.6. Currently, the database is developed and tested on Windows XP and Mac OS X using the Sun JDK 1.5, but it also works in many other operating systems and using other Java runtime environments.
@installation_1013_h2
ソフトウェアのインストール
...
...
@@ -5389,345 +5404,351 @@ Sourceファイル
#Simple Monitoring API.
@links_1107_a
#jBPM
#JBoss jBPM
@links_1108_p
#A platform for executable process languages ranging from business process management (BPM) over workflow to service orchestration.
@links_1109_a
#JGeocoder
#JBoss Jopr
@links_1110_p
#Free Java geocoder. Geocoding is the process of estimating a latitude and longitude for a given location.
#An enterprise management solution for JBoss middleware projects and other application technologies.
@links_1111_a
#JGrass
#JGeocoder
@links_1112_p
#Java Geographic Resources Analysis Support System. Free, multi platform, open source GIS based on the GIS framework of uDig.
#Free Java geocoder. Geocoding is the process of estimating a latitude and longitude for a given location.
@links_1113_a
#Jena
#JGrass
@links_1114_p
#Java framework for building Semantic Web applications.
#Java Geographic Resources Analysis Support System. Free, multi platform, open source GIS based on the GIS framework of uDig.
@links_1115_a
#JMatter
#Jena
@links_1116_p
#Framework for constructing workgroup business applications based on the Naked Objects Architectural Pattern.
#Java framework for building Semantic Web applications.
@links_1117_a
#JotBot
#JMatter
@links_1118_p
#Records your day at user defined intervals.
#Framework for constructing workgroup business applications based on the Naked Objects Architectural Pattern.
@links_1119_a
#JPOX
#JotBot
@links_1120_p
#Java persistent objects.
#Records your day at user defined intervals.
@links_1121_a
#Liftweb
#JPOX
@links_1122_p
#A Scala-based, secure, developer friendly web framework.
#Java persistent objects.
@links_1123_a
#LiquiBase
#Liftweb
@links_1124_p
#A tool to manage database changes and refactorings.
#A Scala-based, secure, developer friendly web framework.
@links_1125_a
#Luntbuild
#LiquiBase
@links_1126_p
#Build automation and management tool.
#A tool to manage database changes and refactorings.
@links_1127_a
#localdb
#Luntbuild
@links_1128_p
#A tool that locates the full file path of the folder containing the database files.
#Build automation and management tool.
@links_1129_a
#Magnolia
#localdb
@links_1130_p
#Microarray Data Management and Export System for PFGRC (Pathogen Functional Genomics Resource Center) Microarrays.
#A tool that locates the full file path of the folder containing the database files.
@links_1131_a
#MiniConnectionPoolManager
#Magnolia
@links_1132_p
#A lightweight standalone JDBC connection pool manager.
#Microarray Data Management and Export System for PFGRC (Pathogen Functional Genomics Resource Center) Microarrays.
@links_1133_a
#Mr. Persister
#MiniConnectionPoolManager
@links_1134_p
#Simple, small and fast object relational mapping.
#A lightweight standalone JDBC connection pool manager.
@links_1135_a
#Myna Application Server
#Mr. Persister
@links_1136_p
#Java web app that provides dynamic web content and Java libraries access from JavaScript.
#Simple, small and fast object relational mapping.
@links_1137_a
#MyTunesRss
#Myna Application Server
@links_1138_p
#MyTunesRSS lets you listen to your music wherever you are.
#Java web app that provides dynamic web content and Java libraries access from JavaScript.
@links_1139_a
#NCGC CurveFit
#MyTunesRss
@links_1140_p
#MyTunesRSS lets you listen to your music wherever you are.
@links_1141_a
#NCGC CurveFit
@links_1142_p
#From: NIH Chemical Genomics Center, National Institutes of Health, USA. An open source application in the life sciences research field. This application handles chemical structures and biological responses of thousands of compounds with the potential to handle million+ compounds. It utilizes an embedded H2 database to enable flexible query/retrieval of all data including advanced chemical substructure and similarity searching. The application highlights an automated curve fitting and classification algorithm that outperforms commercial packages in the field. Commercial alternatives are typically small desktop software that handle a few dose response curves at a time. A couple of commercial packages that do handle several thousand curves are very expensive tools (>60k USD) that require manual curation of analysis by the user; require a license to Oracle; lack advanced query/retrieval; and the ability to handle chemical structures.
@links_1141_a
@links_1143_a
#Nuxeo
@links_1142_p
@links_1144_p
#Standards-based, open source platform for building ECM applications.
@links_1143_a
@links_1145_a
#nWire
@links_1144_p
@links_1146_p
#Eclipse plug-in which expedites Java development. It's main purpose is to help developers find code quicker and easily understand how it relates to the rest of the application, thus, understand the application structure.
@links_1145_a
@links_1147_a
#Ontology Works
@links_1146_p
@links_1148_p
#This company provides semantic technologies including deductive information repositories (the Ontology Works Knowledge Servers), semantic information fusion and semantic federation of legacy databases, ontology-based domain modeling, and management of the distributed enterprise.
@links_1147_a
@links_1149_a
#Ontoprise OntoBroker
@links_1148_p
@links_1150_p
#SemanticWeb-Middleware. It supports all W3C Semantic Web recommendations: OWL, RDF, RDFS, SPARQL, and F-Logic.
@links_1149_a
@links_1151_a
#Open Anzo
@links_1150_p
@links_1152_p
#Semantic Application Server.
@links_1151_a
@links_1153_a
#OpenGroove
@links_1152_p
@links_1154_p
#OpenGroove is a groupware program that allows users to synchronize data.
@links_1153_a
@links_1155_a
#OpenSocial Development Environment (OSDE)
@links_1154_p
@links_1156_p
#Development tool for OpenSocial application.
@links_1155_a
@links_1157_a
#Orion
@links_1156_p
@links_1158_p
#J2EE Application Server.
@links_1157_a
@links_1159_a
#P5H2
@links_1158_p
@links_1160_p
#A library for the <a href="http://www.processing.org">Processing</a> programming language and environment.
@links_1159_a
@links_1161_a
#Phase-6
@links_1160_p
@links_1162_p
#A computer based learning software.
@links_1161_a
@links_1163_a
#Pickle
@links_1162_p
@links_1164_p
#Pickle is a Java library containing classes for persistence, concurrency, and logging.
@links_1163_a
@links_1165_a
#Piman
@links_1164_p
@links_1166_p
#Water treatment projects data management.
@links_1165_a
@links_1167_a
#PolePosition
@links_1166_p
@links_1168_p
#Open source database benchmark.
@links_1167_a
@links_1169_a
#Poormans
@links_1168_p
@links_1170_p
#Very basic CMS running as a SWT application and generating static html pages.
@links_1169_a
@links_1171_a
#Railo
@links_1170_p
@links_1172_p
#Railo is an alternative engine for the Cold Fusion Markup Language, that compiles code programmed in CFML into Java bytecode and executes it on a servlet engine.
@links_1171_a
@links_1173_a
#Razuna
@links_1172_p
@links_1174_p
#Open source Digital Asset Management System with integrated Web Content Management.
@links_1173_a
@links_1175_a
#RIFE
@links_1174_p
@links_1176_p
#A full-stack web application framework with tools and APIs to implement most common web features.
@links_1175_a
@links_1177_a
#Rutema
@links_1176_p
@links_1178_p
#Rutema is a test execution and management tool for heterogeneous development environments written in Ruby.
@links_1177_a
@links_1179_a
#Sava
@links_1178_p
@links_1180_p
#Open-source web-based content management system.
@links_1179_a
@links_1181_a
#Scriptella
@links_1180_p
@links_1182_p
#ETL (Extract-Transform-Load) and script execution tool.
@links_1181_a
@links_1183_a
#Sesar
@links_1182_p
@links_1184_p
#Dependency Injection Container with Aspect Oriented Programming.
@links_1183_a
@links_1185_a
#SemmleCode
@links_1184_p
@links_1186_p
#Eclipse plugin to help you improve software quality.
@links_1185_a
@links_1187_a
#SeQuaLite
@links_1186_p
@links_1188_p
#A free, light-weight, java data access framework.
@links_1187_a
@links_1189_a
#ShapeLogic
@links_1188_p
@links_1190_p
#Toolkit for declarative programming, image processing and computer vision.
@links_1189_a
@links_1191_a
#Shellbook
@links_1190_p
@links_1192_p
#Desktop publishing application.
@links_1191_a
@links_1193_a
#Signsoft intelliBO
@links_1192_p
@links_1194_p
#Persistence middleware supporting the JDO specification.
@links_1193_a
@links_1195_a
#SimpleORM
@links_1194_p
@links_1196_p
#Simple Java Object Relational Mapping.
@links_1195_a
@links_1197_a
#SymmetricDS
@links_1196_p
@links_1198_p
#A web-enabled, database independent, data synchronization/replication software.
@links_1197_a
@links_1199_a
#SmartFoxServer
@links_1198_p
@links_1200_p
#Platform for developing multiuser applications and games with Macromedia Flash.
@links_1199_a
@links_1201_a
#Social Bookmarks Friend Finder
@links_1200_p
@links_1202_p
#A GUI application that allows you to find users with similar bookmarks to the user specified (for delicious.com).
@links_1201_a
@links_1203_a
#Springfuse
@links_1202_p
@links_1204_p
#Code generation For Spring, Spring MVC & Hibernate.
@links_1203_a
@links_1205_a
#SQLOrm
@links_1204_p
@links_1206_p
#Java Object Relation Mapping.
@links_1205_a
@links_1207_a
#StorYBook
@links_1206_p
@links_1208_p
#A summary-based tool for novelist and script writers. It helps to keep the overview over the various traces a story has.
@links_1207_a
@links_1209_a
#StreamCruncher
@links_1208_p
@links_1210_p
#Event (stream) processing kernel.
@links_1209_a
@links_1211_a
#Tune Backup
@links_1210_p
@links_1212_p
#Easy-to-use backup solution for your iTunes library.
@links_1211_a
@links_1213_a
#weblica
@links_1212_p
@links_1214_p
#Desktop CMS.
@links_1213_a
@links_1215_a
#Web of Web
@links_1214_p
@links_1216_p
#Collaborative and realtime interactive media platform for the web.
@links_1215_a
@links_1217_a
#Werkzeugkasten
@links_1216_p
@links_1218_p
#Minimum Java Toolset.
@links_1217_a
@links_1219_a
#VPDA
@links_1218_p
@links_1220_p
#View providers driven applications is a Java based application framework for building applications composed from server components - view providers.
@links_1219_a
@links_1221_a
#Volunteer database
@links_1220_p
@links_1222_p
#A database front end to register volunteers, partnership and donation for a Non Profit organization.
@mainWeb_1000_h1
...
...
@@ -6064,13 +6085,13 @@ Derby
#ms
@performance_1016_td
#610
#547
@performance_1017_td
#657
#532
@performance_1018_td
#3187
#2594
@performance_1019_td
#Simple: Query (random)
...
...
@@ -6079,13 +6100,13 @@ Derby
#ms
@performance_1021_td
#297
#250
@performance_1022_td
#312
#391
@performance_1023_td
#1828
#1515
@performance_1024_td
#Simple: Query (sequential)
...
...
@@ -6094,13 +6115,13 @@ Derby
#ms
@performance_1026_td
#203
#188
@performance_1027_td
#266
#313
@performance_1028_td
#1766
#1406
@performance_1029_td
#Simple: Update (random)
...
...
@@ -6109,13 +6130,13 @@ Derby
#ms
@performance_1031_td
#1078
#812
@performance_1032_td
#1484
#1750
@performance_1033_td
#22031
#17704
@performance_1034_td
#Simple: Delete (sequential)
...
...
@@ -6124,13 +6145,13 @@ Derby
#ms
@performance_1036_td
#234
#203
@performance_1037_td
#281
#250
@performance_1038_td
#7407
#8843
@performance_1039_td
#Simple: Memory Usage
...
...
@@ -6139,10 +6160,10 @@ Derby
#MB
@performance_1041_td
#6
#7
@performance_1042_td
#7
#11
@performance_1043_td
#11
...
...
@@ -6154,13 +6175,13 @@ Derby
#ms
@performance_1046_td
#859
#578
@performance_1047_td
#438
#719
@performance_1048_td
#4047
#3328
@performance_1049_td
#BenchA: Transactions
...
...
@@ -6169,13 +6190,13 @@ Derby
#ms
@performance_1051_td
#5266
#3047
@performance_1052_td
#2875
#2406
@performance_1053_td
#17500
#12907
@performance_1054_td
#BenchA: Memory Usage
...
...
@@ -6184,10 +6205,10 @@ Derby
#MB
@performance_1056_td
#9
#10
@performance_1057_td
#14
#15
@performance_1058_td
#10
...
...
@@ -6199,13 +6220,13 @@ Derby
#ms
@performance_1061_td
#4016
#2141
@performance_1062_td
#2687
#2406
@performance_1063_td
#16875
#11562
@performance_1064_td
#BenchB: Transactions
...
...
@@ -6214,13 +6235,13 @@ Derby
#ms
@performance_1066_td
#2609
#1125
@performance_1067_td
#3282
#1375
@performance_1068_td
#4250
#3625
@performance_1069_td
#BenchB: Memory Usage
...
...
@@ -6232,7 +6253,7 @@ Derby
#9
@performance_1072_td
#10
#11
@performance_1073_td
#8
...
...
@@ -6244,13 +6265,13 @@ Derby
#ms
@performance_1076_td
#891
#688
@performance_1077_td
#594
@performance_1078_td
#5766
#4500
@performance_1079_td
#BenchC: Transactions
...
...
@@ -6259,13 +6280,13 @@ Derby
#ms
@performance_1081_td
#4359
#1906
@performance_1082_td
#75438
#64062
@performance_1083_td
#11718
#6047
@performance_1084_td
#BenchC: Memory Usage
...
...
@@ -6274,13 +6295,13 @@ Derby
#MB
@performance_1086_td
#9
#11
@performance_1087_td
#18
#17
@performance_1088_td
#9
#11
@performance_1089_td
#Executed statements
...
...
@@ -6289,13 +6310,13 @@ Derby
##
@performance_1091_td
#594255
#322929
@performance_1092_td
#594255
#322929
@performance_1093_td
#594255
#322929
@performance_1094_td
#Total time
...
...
@@ -6304,13 +6325,13 @@ Derby
#ms
@performance_1096_td
#20422
#11485
@performance_1097_td
#88314
#74798
@performance_1098_td
#96375
#74031
@performance_1099_td
#Statements per second
...
...
@@ -6319,13 +6340,13 @@ Derby
##
@performance_1101_td
#29098
#28117
@performance_1102_td
#6728
#4317
@performance_1103_td
#6166
#4362
@performance_1104_h3
#Client-Server
...
...
@@ -6358,19 +6379,19 @@ MySQL
#ms
@performance_1114_td
#3125
#2782
@performance_1115_td
#3312
#2656
@performance_1116_td
#7140
#5625
@performance_1117_td
#5109
#4563
@performance_1118_td
#3594
#3484
@performance_1119_td
#Simple: Query (random)
...
...
@@ -6379,19 +6400,19 @@ MySQL
#ms
@performance_1121_td
#3390
#3093
@performance_1122_td
#3328
#2703
@performance_1123_td
#9953
#6688
@performance_1124_td
#5422
#4812
@performance_1125_td
#4812
#3860
@performance_1126_td
#Simple: Query (sequential)
...
...
@@ -6400,19 +6421,19 @@ MySQL
#ms
@performance_1128_td
#3235
#2969
@performance_1129_td
#3219
#2594
@performance_1130_td
#9813
#6437
@performance_1131_td
#5296
#4719
@performance_1132_td
#3969
#3625
@performance_1133_td
#Simple: Update (random)
...
...
@@ -6421,19 +6442,19 @@ MySQL
#ms
@performance_1135_td
#3437
#2969
@performance_1136_td
#4562
#3531
@performance_1137_td
#26594
#18250
@performance_1138_td
#6766
#5953
@performance_1139_td
#5703
#5125
@performance_1140_td
#Simple: Delete (sequential)
...
...
@@ -6442,19 +6463,19 @@ MySQL
#ms
@performance_1142_td
#1391
#1047
@performance_1143_td
#1625
#1250
@performance_1144_td
#9343
#6875
@performance_1145_td
#2750
#2485
@performance_1146_td
#2094
#2390
@performance_1147_td
#Simple: Memory Usage
...
...
@@ -6466,16 +6487,16 @@ MySQL
#7
@performance_1150_td
#7
#11
@performance_1151_td
#13
#14
@performance_1152_td
#0
@performance_1153_td
#1
#0
@performance_1154_td
#BenchA: Init
...
...
@@ -6484,19 +6505,19 @@ MySQL
#ms
@performance_1156_td
#2781
#2250
@performance_1157_td
#2954
#2453
@performance_1158_td
#7828
#6031
@performance_1159_td
#4875
#4328
@performance_1160_td
#3859
#3625
@performance_1161_td
#BenchA: Transactions
...
...
@@ -6505,19 +6526,19 @@ MySQL
#ms
@performance_1163_td
#13015
#10250
@performance_1164_td
#11718
#9016
@performance_1165_td
#30031
#21484
@performance_1166_td
#17672
#15609
@performance_1167_td
#13187
#11172
@performance_1168_td
#BenchA: Memory Usage
...
...
@@ -6526,16 +6547,16 @@ MySQL
#MB
@performance_1170_td
#9
#10
@performance_1171_td
#17
#15
@performance_1172_td
#10
@performance_1173_td
#1
#0
@performance_1174_td
#1
...
...
@@ -6547,19 +6568,19 @@ MySQL
#ms
@performance_1177_td
#12000
#9500
@performance_1178_td
#13047
#10672
@performance_1179_td
#30562
#22609
@performance_1180_td
#20687
#19609
@performance_1181_td
#15328
#13406
@performance_1182_td
#BenchB: Transactions
...
...
@@ -6568,19 +6589,19 @@ MySQL
#ms
@performance_1184_td
#5375
#2734
@performance_1185_td
#3688
#2656
@performance_1186_td
#8063
#3875
@performance_1187_td
#6250
#4688
@performance_1188_td
#4594
#2531
@performance_1189_td
#BenchB: Memory Usage
...
...
@@ -6592,10 +6613,10 @@ MySQL
#10
@performance_1192_td
#12
#11
@performance_1193_td
#8
#11
@performance_1194_td
#1
...
...
@@ -6610,19 +6631,19 @@ MySQL
#ms
@performance_1198_td
#2390
#1860
@performance_1199_td
#1875
#1484
@performance_1200_td
#7015
#6890
@performance_1201_td
#2515
#2219
@performance_1202_td
#4062
#3438
@performance_1203_td
#BenchC: Transactions
...
...
@@ -6631,19 +6652,19 @@ MySQL
#ms
@performance_1205_td
#11391
#9046
@performance_1206_td
#77922
#63266
@performance_1207_td
#23766
#18641
@performance_1208_td
#13203
#11703
@performance_1209_td
#8141
#7421
@performance_1210_td
#BenchC: Memory Usage
...
...
@@ -6652,16 +6673,16 @@ MySQL
#MB
@performance_1212_td
#11
#12
@performance_1213_td
#18
#17
@performance_1214_td
#15
#13
@performance_1215_td
#1
#0
@performance_1216_td
#1
...
...
@@ -6673,19 +6694,19 @@ MySQL
##
@performance_1219_td
#594255
#322929
@performance_1220_td
#594255
#322929
@performance_1221_td
#594255
#322929
@performance_1222_td
#594255
#322929
@performance_1223_td
#594255
#322929
@performance_1224_td
#Total time
...
...
@@ -6694,19 +6715,19 @@ MySQL
#ms
@performance_1226_td
#61530
#48500
@performance_1227_td
#127250
#102281
@performance_1228_td
#170108
#123405
@performance_1229_td
#90545
#80688
@performance_1230_td
#69343
#60077
@performance_1231_td
#Statements per second
...
...
@@ -6715,19 +6736,19 @@ MySQL
##
@performance_1233_td
#9657
#6658
@performance_1234_td
#4669
#3157
@performance_1235_td
#3493
#2616
@performance_1236_td
#6563
#4002
@performance_1237_td
#8569
#5375
@performance_1238_h3
#Benchmark Results and Comments
...
...
@@ -6736,7 +6757,7 @@ MySQL
H2
@performance_1240_p
#Version 1.0.78 (2008-08-28) was used for the test. For simpler operations, the performance of H2 is about the same as for HSQLDB. For more complex queries, the query optimizer is very important. However H2 is not very fast in every case, certain kind of queries may still be slow. One situation where is H2 is slow is large result sets, because they are buffered to disk if more than a certain number of records are returned. The advantage of buffering is, there is no limit on the result set size. The open/close time is almost fixed, because of the file locking protocol: The engine waits some time after opening a database to ensure the database files are not opened by another process.
#Version 1.1.114 (2009-06-01) was used for the test. For simpler operations, the performance of H2 is about the same as for HSQLDB. For more complex queries, the query optimizer is very important. However H2 is not very fast in every case, certain kind of queries may still be slow. One situation where is H2 is slow is large result sets, because they are buffered to disk if more than a certain number of records are returned. The advantage of buffering is, there is no limit on the result set size. The open/close time is almost fixed, because of the file locking protocol: The engine waits some time after opening a database to ensure the database files are not opened by another process.
@performance_1241_h4
HSQLDB
...
...
@@ -6757,13 +6778,13 @@ Derby
PostgreSQL
@performance_1247_p
#Version 8.3.4 was used for the test. The following options where changed in postgresql.conf: fsync = off, commit_delay = 1000. PostgreSQL is run in server mode. It looks like the base performance is slower than MySQL, the reason could be the network layer. The memory usage number is incorrect, because only the memory usage of the JDBC driver is measured.
#Version 8.3.7 was used for the test. The following options where changed in postgresql.conf: fsync = off, commit_delay = 1000. PostgreSQL is run in server mode. It looks like the base performance is slower than MySQL, the reason could be the network layer. The memory usage number is incorrect, because only the memory usage of the JDBC driver is measured.
@performance_1248_h4
MySQL
@performance_1249_p
#Version 5.0.67 was used for the test. MySQL was run with the InnoDB backend. The setting innodb_flush_log_at_trx_commit (found in the my.ini file) was set to 0. Otherwise (and by default), MySQL is really slow (around 140 statements per second in this test) because it tries to flush the data to disk for each commit. For small transactions (when autocommit is on) this is really slow. But many use cases use small or relatively small transactions. Too bad this setting is not listed in the configuration wizard, and it always overwritten when using the wizard. You need to change this setting manually in the file my.ini, and then restart the service. The memory usage number is incorrect, because only the memory usage of the JDBC driver is measured.
#Version 5.1.34-community was used for the test. MySQL was run with the InnoDB backend. The setting innodb_flush_log_at_trx_commit (found in the my.ini file) was set to 0. Otherwise (and by default), MySQL is really slow (around 140 statements per second in this test) because it tries to flush the data to disk for each commit. For small transactions (when autocommit is on) this is really slow. But many use cases use small or relatively small transactions. Too bad this setting is not listed in the configuration wizard, and it always overwritten when using the wizard. You need to change this setting manually in the file my.ini, and then restart the service. The memory usage number is incorrect, because only the memory usage of the JDBC driver is measured.
@performance_1250_h4
#Firebird
...
...
@@ -8553,78 +8574,6 @@ SQLコマンドがコマンドエリアに表示されます。
@roadmap_1391_li
#String.intern (so that Strings can be compared with ==) will not be used because some VMs have problems when used extensively.
@search_1000_b
検索:
@search_1001_td
Highlight keyword(s)
@search_1002_a
ホーム
@search_1003_a
クイックスタート
@search_1004_a
インストール
@search_1005_a
チュートリアル
@search_1006_a
特徴
@search_1007_a
パフォーマンス
@search_1008_a
進歩したトピックス
@search_1009_a
#JaQu
@search_1010_a
ダウンロード
@search_1011_b
参照
@search_1012_a
SQL文法
@search_1013_a
関数
@search_1014_a
データ型
@search_1015_a
Javadoc
@search_1016_a
#Docs as PDF (1 MB)
@search_1017_a
#Error Analyzer
@search_1018_b
付録
@search_1019_a
ビルド
@search_1020_a
歴史とロードマップ
@search_1021_a
#Links
@search_1022_a
FAQ
@search_1023_a
ライセンス
@sourceError_1000_h1
#Online Error Analyzer
...
...
@@ -8746,7 +8695,7 @@ Windows
[スタート]、 [すべてのプログラム]、 [H2]、 [H2 Console]をクリックします
@tutorial_1027_td
正しく動作したら、 システムトレイにアイコンが追加されます:
#When using the Sun JDK 1.5, a window with the title 'H2 Console ' should appear. When using the Sun JDK 1.6, an icon will be added to the system tray:
@tutorial_1028_td
#If you don't get the window and the system tray icon, then maybe Java is not installed correctly (in this case, try another way to start the application). A browser window should open and point to the Login page at http://localhost:8082 .
