@@ -1715,7 +1715,7 @@ Add a CONTAINS_UNCOMMITTED column to the SESSIONS metadata table, to allow detec
Some small fixes to the GEOMETRY support, patches by Nicolas Fortin.
@changelog_1018_li
When the H2 parser fails to parse a SQL statement, throw a more specific exception that contains extra information to make it possible for smart editors to do autocomplete. Patch from Nicolas Fortin.
The BNF tool and the autocomplete feature are exported in OSGi, which makes it possible for smart editors to do autocomplete. Patch from Nicolas Fortin.
@changelog_1019_li
Fix DROP ALL OBJECTS and DROP SCHEMA in the presence of tables with computed column dependencies.
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@@ -1726,550 +1726,553 @@ Session-temporary LOB's could sometimes accumulate, increasing the size of the D
@changelog_1021_li
There was a bug where a hash index with more than one column would be silently converted to a regular index. It will now throw an exception.
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@changelog_1022_li
Query Statistics: new feature which stores the newest 100 SQL queries executed and their performance data. Useful for tracking down badly performing queries.
@changelog_1023_h2
Version 1.3.173 (2013-07-28)
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@changelog_1024_li
Support empty statements that just contains a comment.
@changelog_1024_li
@changelog_1025_li
Server mode: if there was an error while reading from a LOB, the session was closed in some cases.
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@changelog_1026_li
Issue 463: Driver name and version are now the same in OsgiDataSourceFactory and JdbcDatabaseMetaData.
@changelog_1026_li
@changelog_1027_li
JaQu: The data type VARCHAR is now (again) used for Strings (no longer TEXT, except when explicitly set).
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@changelog_1028_li
For in-memory databases, creating an index on a CLOB or BLOB column is no longer supported. This is to simplify the MVTableEngine.
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@changelog_1029_li
New column "information_schema.tables.row_count_estimate".
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@changelog_1030_li
Issue 468: trunc(timestamp) could return the wrong value (+12 hours), and trunc(number) throw a NullPointerException.
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@changelog_1031_li
The expression trunc(number) threw a NullPointerException.
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@changelog_1032_li
Fixed a deadlock when updating LOB's concurrently. See TestLob.testDeadlock2().
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@changelog_1033_li
Fixed a deadlock related to very large temporary result sets.
@changelog_1033_li
@changelog_1034_li
Add "-list" command line option to Shell tool so that result-list-mode can be triggered when reading from a file.
@changelog_1034_li
@changelog_1035_li
Issue 474: H2 MySQL Compatibility code fails to ignore "COMMENT" in CREATE TABLE, patch from Aaron Azeckoski.
@changelog_1035_li
@changelog_1036_li
Issue 476: Broken link in jaqu.html
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@changelog_1037_li
Fix potential UTF8 encoding issue in org.h2.store.FileStore, reported by Juerg Spiess.
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@changelog_1038_li
Improve error message when check constraint is broken, test case from Gili (cowwoc).
@changelog_1038_li
@changelog_1039_li
Improve error message when we have a unique constraint violation, displays the offending key in the error message.
@changelog_1039_li
@changelog_1040_li
Issue 478: Support for "SHOW TRANSACTION ISOLATION LEVEL", patch from Andrew Franklin.
@changelog_1040_li
@changelog_1041_li
Issue 475: PgServer: add support for CancelRequest, patch from Andrew Franklin.
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@changelog_1042_li
Issue 473: PgServer missing -key option, patch from Andrew Franklin.
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@changelog_1043_li
Issue 471: CREATE VIEW does not check user rights, patch from Andrew Franklin.
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@changelog_1044_li
Issue 477: PgServer binary transmission of query params is unimplemented, patch from Andrew Franklin.
@changelog_1044_li
@changelog_1045_li
Issue 479: Support for SUBSTRING without a FROM condition, patch from Andrew Franklin.
@changelog_1045_li
@changelog_1046_li
Issue 472: PgServer does not work with any recent Postgres JDBC driver, patch from Andrew Franklin.
@changelog_1046_li
@changelog_1047_li
Add syntax for passing additional parameters into custom TableEngine implementations.
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@changelog_1048_li
Issue 480: Bugfix post issue 475, 477, patch from Andrew Franklin.
@changelog_1048_li
@changelog_1049_li
Issue 481: Further extensions to PgServer to support better support PG JDBC, patch from Andrew Franklin.
@changelog_1049_li
@changelog_1050_li
Add support for spatial datatype GEOMETRY.
@changelog_1050_li
@changelog_1051_li
Add support for in-memory spatial index.
@changelog_1051_li
@changelog_1052_li
change the PageStore#changeCount field from an int to a long, to cope with databases with very high transaction rates.
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@changelog_1053_li
Fix a NullPointerException when attempting to add foreign key reference to a view.
@changelog_1053_li
@changelog_1054_li
Add sufficient ClientInfo support to our javax.sql.Connection implementation to make WebSphere happy.
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@changelog_1055_li
Issue 482: class LobStorageBackend$LobInputStream does not override the method InputStream.available().
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@changelog_1056_li
Fix corruption resulting from a mix of the "WRITE_DELAY=0" option and "SELECT DISTINCT" queries that don't fit in memory.
@changelog_1056_li
@changelog_1057_li
Fix the combination of updating a table which contains an LOB, and reading from the LOB at the same time. Previously it would throw an exception, now it works.
@changelog_1057_li
@changelog_1058_li
Issue 484: In the H2 Console tool, all schemas starting with "INFO" where hidden. Now they are hidden only if the database is not H2. Patch from "mgcodeact"/"cumer d"
@changelog_1058_li
@changelog_1059_li
MySQL compatibility, support the "AUTO_INCREMENT=3" part of the CREATE TABLE statement.
@changelog_1059_li
@changelog_1060_li
Issue 486: MySQL compatibility, support the "DEFAULT CHARSET" part of the CREATE TABLE statement.
@changelog_1060_li
@changelog_1061_li
Issue 487: support the MySQL "SET foreign_key_checks = 0" command
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@changelog_1062_li
Issue 490: support MySQL "USING BTREE" index declaration
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@changelog_1063_li
Issue 485: Database get corrupted when column is renamed for which check constraint was defined inside create table statement.
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@changelog_1064_li
Issue 499: support MySQL "UNIQUE KEY (ID) USING BTREE" constraint syntax
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@changelog_1065_li
Issue 501: "CREATE TABLE .. WITH" not serialized, patch from nico.devel
@changelog_1065_li
@changelog_1066_li
Avoid problems with runtime-compiled ALIAS methods when people have set the JAVA_TOOL_OPTIONS environment variable.
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@changelog_1067_h2
Version 1.3.172 (2013-05-25)
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@changelog_1068_li
Referential integrity: when adding a referential integrity constraint failed, and if creating the constraint automatically created an index, this index was not removed.
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@changelog_1069_li
The auto-analyze feature now only reads 1000 rows per table instead of 10000.
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@changelog_1070_li
The optimization for IN(...) queries combined with OR could result in a strange exception of the type "column x must be included in the group by list".
@changelog_1070_li
@changelog_1071_li
Issue 454: Use Charset for type-safety.
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@changelog_1072_li
Queries with both LIMIT and OFFSET could throw an IllegalArgumentException.
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@changelog_1073_li
MVStore: multiple issues were fixed: 460, 461, 462, 464, 466.
@changelog_1073_li
@changelog_1074_li
MVStore: larger stores (multiple GB) are now much faster.
@changelog_1074_li
@changelog_1075_li
When using local temporary tables and not dropping them manually before closing the session, and then killing the process could result in a database that couldn't be opened (except when using the recover tool).
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@changelog_1076_li
Support TRUNC(timestamp) for improved Oracle compatibility.
@changelog_1076_li
@changelog_1077_li
Add support for CREATE TABLE TEST (ID BIGSERIAL) for PostgreSQL compatibility. Patch from Jesse Long.
@changelog_1077_li
@changelog_1078_li
Add new collation command SET BINARY_COLLATION UNSIGNED, helps with people testing BINARY columns in MySQL mode.
@changelog_1078_li
@changelog_1079_li
Issue 453: ABBA race conditions in TABLE LINK connection sharing.
@changelog_1079_li
@changelog_1080_li
Issue 449: Postgres Serial data type should not automatically be marked as primary key
@changelog_1080_li
@changelog_1081_li
Issue 406: Support "select h2version()"
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@changelog_1082_li
Issue 389: When there is a multi-column primary key, H2 does not seem to always pick the right index
@changelog_1082_li
@changelog_1083_li
Issue 305: Implement SELECT ... FOR FETCH ONLY
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@changelog_1084_li
Issue 274: Sybase/MSSQLServer compatibility - Add GETDATE and CHARINDEX system functions
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@changelog_1085_li
Issue 274: Sybase/MSSQLServer compatibility - swap parameters of CONVERT function.
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@changelog_1086_li
Issue 274: Sybase/MSSQLServer compatibility - support index clause e.g. "select * from test (index table1_index)"
@changelog_1086_li
@changelog_1087_li
Fix bug in Optimizing SELECT * FROM A WHERE X=1 OR X=2 OR X=3 into SELECT * FROM A WHERE X IN (1,2,3)
@changelog_1087_li
@changelog_1088_li
Issue 442: Groovy patch for SourceCompiler (function ALIAS)
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@changelog_1089_li
Issue 459: Improve LOB documentation
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@changelog_1090_h2
Version 1.3.171 (2013-03-17)
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@changelog_1091_li
Security: the TCP server did not correctly restrict access rights of clients in some cases. This was specially a problem when using the flag "tcpAllowOthers".
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@changelog_1092_li
H2 Console: the session timeout can now be configured using the system property "h2.consoleTimeout".
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@changelog_1093_li
Issue 431: Improved compatibility with MySQL: support for "ENGINE=InnoDB charset=UTF8" when creating a table.
@changelog_1093_li
@changelog_1094_li
Issue 249: Improved compatibility with MySQL in the MySQL mode: now the methods DatabaseMetaData methods stores*Case*Identifiers return the same as MySQL when using the MySQL mode.
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@changelog_1095_li
Issue 434: H2 Console didn't work in the Chrome browser due to a wrong viewport argument.
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@changelog_1096_li
There was a possibility that the .lock.db file was not deleted when the database was closed, which could slow down opening the database.
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@changelog_1097_li
The SQL script generated by the "script" command contained inconsistent newlines on Windows.
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@changelog_1098_li
When using trace level 4 (SLF4J) in the server mode, a directory "trace.db" and an empty file was created on the client side. This is no longer made.
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@changelog_1099_li
Optimize IN(...) queries: there was a bug in version 1.3.170 if the type of the left hand side didn't match the type of the right hand side. Fixed.
@changelog_1099_li
@changelog_1100_li
Optimize IN(...) queries: there was a bug in version 1.3.170 for comparison of the type "X IN(NULL, NULL)". Fixed.
@changelog_1100_li
@changelog_1101_li
Timestamps with timezone that were passed as a string were not always converted correctly. For example "2012-11-06T23:00:00.000Z" was converted to "2012-11-06" instead of to "2012-11-07" in the timezone CET. Thanks a lot to Steve Hruda for reporting the problem!
@changelog_1101_li
@changelog_1102_li
New table engine "org.h2.mvstore.db.MVTableEngine" that internally uses the MVStore to persist data. To try it out, append ";DEFAULT_TABLE_ENGINE=org.h2.mvstore.db.MVTableEngine" to the database URL. This is still very experimental, and many features are not supported yet. The data is stored in a file with the suffix ".mv.db".
@changelog_1102_li
@changelog_1103_li
New connection setting "DEFAULT_TABLE_ENGINE" to use a specific table engine if none is set explicitly. This is to simplify testing the MVStore table engine.
@changelog_1103_li
@changelog_1104_li
MVStore: encrypted stores are now supported. Only standardized algorithms are used: PBKDF2, SHA-256, XTS-AES, AES-128.
@changelog_1104_li
@changelog_1105_li
MVStore: improved API thanks to Simo Tripodi.
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MVStore: maps can now be renamed.
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MVStore: store the file header also at the end of each chunk, which results in a further reduced number of write operations.
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MVStore: a map implementation that supports concurrent operations.
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@changelog_1109_li
MVStore: unified exception handling; the version is included in the messages.
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MVStore: old data is now retained for 45 seconds by default.
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@changelog_1111_li
MVStore: compress is now disabled by default, and can be enabled on request.
@changelog_1111_li
@changelog_1112_li
Support ALTER TABLE ADD ... AFTER. Patch from Andrew Gaul (argaul at gmail.com). Fixes issue 401.
@changelog_1112_li
@changelog_1113_li
Improved OSGi support. H2 now registers itself as a DataSourceFactory service. Fixes issue 365.
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@changelog_1114_li
Add a DISK_SPACE_USED system function. Fixes issue 270.
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@changelog_1115_li
Fix a compile-time ambiguity when compiling with JDK7, thanks to a patch from Lukas Eder.
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@changelog_1116_li
Supporting dropping an index for Lucene full-text indexes.
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Optimized performance for SELECT ... ORDER BY X LIMIT Y OFFSET Z queries for in-memory databases using partial sort (by Sergi Vladykin).
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Experimental off-heap memory storage engine "nioMemFS:" and "nioMemLZF:", suggestion from Mark Addleman.
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@changelog_1119_li
Issue 438: JdbcDatabaseMetaData.getSchemas() is no longer supported as of 1.3.169.
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@changelog_1120_li
MySQL compatibility: support for ALTER TABLE tableName MODIFY [COLUMN] columnName columnDef. Patch from Ville Koskela.
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@changelog_1121_li
Issue 404: SHOW COLUMNS FROM tableName does not work with ALLOW_LITERALS=NUMBERS.
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@changelog_1122_li
Throw an explicit error to make it clear we don't support the TRIGGER combination of SELECT and FOR EACH ROW.
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@changelog_1123_li
Issue 439: Utils.sortTopN does not handle single-element arrays.
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@changelog_1124_h2
Version 1.3.170 (2012-11-30)
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@changelog_1125_li
Issue 407: The TriggerAdapter didn't work with CLOB and BLOB columns.
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@changelog_1126_li
PostgreSQL compatibility: support for data types BIGSERIAL and SERIAL as an alias for AUTO_INCREMENT.
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@changelog_1127_li
Issue 417: H2 Console: the web session timeout didn't work, resulting in a memory leak. This was only a problem if the H2 Console was run for a long time and many sessions were opened.
@changelog_1127_li
@changelog_1128_li
Issue 412: Running the Server tool with just the option "-browser" will now log a warning.
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@changelog_1129_li
Issue 411: CloseWatcher registration was not concurrency-safe.
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@changelog_1130_li
MySQL compatibility: support for CONCAT_WS. Thanks a lot to litailang for the patch!
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@changelog_1131_li
PostgreSQL compatibility: support for EXTRACT(WEEK FROM dateColumn). Thanks to Prashant Bhat for the patch!
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@changelog_1132_li
Fix for a bug where we would sometimes use the wrong unique constraint to validate foreign key constraints.
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@changelog_1133_li
Support BOM at the beginning of files for the RUNSCRIPT command
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@changelog_1134_li
Fix in calling SET @X = IDENTITY() where it would return NULL incorrectly
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@changelog_1135_li
Fix ABBA deadlock between adding a constraint and the H2-Log-Writer thread.
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@changelog_1136_li
Optimize IN(...) queries where the values are constant and of the same type.
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@changelog_1137_li
Restore tool: the parameter "quiet" was not used and is now removed.
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@changelog_1138_li
Fix ConcurrentModificationException when creating tables and executing SHOW TABLES in parallel. Reported by Viktor Voytovych.
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Serialization is now pluggable using the system property "h2.javaObjectSerializer". Thanks to Sergi Vladykin for the patch!
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Version 1.3.169 (2012-09-09)
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The default jar file is now compiled for Java 6.
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@changelog_1142_li
The new jar file will probably not end up in the central Maven repository in the next few weeks because Sonatype has disabled automatic synchronization from SourceForge (which they call 'legacy sync' now). It will probably take some time until this is sorted out. The H2 jar files are deployed to http://h2database.com/m2-repo/com/h2database/h2/maven-metadata.xml and http://hsql.sourceforge.net/m2-repo/com/h2database/h2/maven-metadata.xml as usual.
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@changelog_1143_li
A part of the documentation and the H2 Console has been changed to support the Apple retina display.
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@changelog_1144_li
The CreateCluster tool could not be used if the source database contained a CLOB or BLOB. The root cause was that the TCP server did not synchronize on the session, which caused a problem when using the exclusive mode.
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Statement.getQueryTimeout(): only the first call to this method will query the database. If the query timeout was changed in another way than calling setQueryTimeout, this method will always return the last value. This was changed because Hibernate calls getQueryTimeout() a lot.
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@changelog_1146_li
Issue 416: PreparedStatement.setNString throws AbstractMethodError. All implemented JDBC 4 methods that don't break compatibility with Java 5 are now included in the default jar file.
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Issue 414: for some functions, the parameters were evaluated twice (for example "char(nextval(..))" ran "nextval(..)" twice).
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The ResultSetMetaData methods getSchemaName and getTableName could return null instead of "" (an empty string) as specified in the JDBC API.
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Added compatibility for "SET NAMES" query in MySQL compatibility mode.
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@changelog_1150_h2
Version 1.3.168 (2012-07-13)
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The message "Transaction log could not be truncated" was sometimes written to the .trace.db file even if there was no problem truncating the transaction log.
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@changelog_1152_li
New system property "h2.serializeJavaObject" (default: true) that allows to disable serializing Java objects, so that the objects compareTo and toString methods can be used.
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@changelog_1153_li
Dylan has translated the H2 Console tool to Korean. Thanks a lot!
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@changelog_1154_li
Executing the statement CREATE INDEX IF ALREADY EXISTS if the index already exists no longer fails for a read only database.
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@changelog_1155_li
MVCC: concurrently updating a row could result in the row to appear deleted in the second connection, if there are multiple unique indexes (or a primary key and at least one unique index). Thanks a lot to Teruo for the patch!
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Fulltext search: in-memory Lucene indexes are now supported.
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@changelog_1157_li
Fulltext search: UUID primary keys are now supported.
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@changelog_1158_li
Apache Tomcat 7.x will now longer log a warning when unloading the web application, if using a connection pool.
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@changelog_1159_li
H2 Console: support the Midori browser (for Debian / Raspberry Pi)
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@changelog_1160_li
When opening a remote session, don't open a temporary file if the trace level is set to zero
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@changelog_1161_li
Use HMAC for authenticating remote LOB id's, removing the need for maintaining a cache, and removing the limit on the number of LOBs per result set.
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H2 Console: HTML and XML documents can now be edited in an updatable result set. There is (limited) support for editing multi-line documents.
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Version 1.3.167 (2012-05-23)
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@changelog_1164_li
H2 Console: when editing a row, an empty varchar column was replaced with a single space.
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@changelog_1165_li
Lukas Eder has updated the jOOQ documentation.
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@changelog_1166_li
Some nested joins could not be executed, for example: select * from (select * from (select * from a) a right join b b) c;
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@changelog_1167_li
MS SQL Server compatibility: ISNULL is now an alias for IFNULL.
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@changelog_1168_li
Terrence Huang has completed the translation of the H2 Console tool to Chinese. Thanks a lot!
@changelog_1168_li
@changelog_1169_li
Server mode: the number of CLOB / BLOB values that were cached on the server is now the maximum of: 5 times the SERVER_RESULT_SET_FETCH_SIZE (which is 100 by default), and SysProperties.SERVER_CACHED_OBJECTS.
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@changelog_1170_li
In the trace file, the query execution time was incorrect in some cases, specially for the statement SET TRACE_LEVEL_FILE 2.
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@changelog_1171_li
The feature LOG_SIZE_LIMIT that was introduced in version 1.3.165 did not always work correctly (specially with regards to multithreading) and has been removed. The message "Transaction log could not be truncated" is still written to the .trace.db file if required.
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Then reading from a resource using the prefix "classpath:", the ContextClassLoader is now used if the resource can't be read otherwise.
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DatabaseEventListener now calls setProgress whenever a statement starts and ends.
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DatabaseEventListener now calls setProgress periodically while a statement is running.
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@changelog_1175_li
The table INFORMATION_SCHEMA.FUNCTION_ALIASES now includes a column TYPE_NAME.
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@changelog_1176_li
Issue 378: when using views, the wrong values were bound to a parameter in some cases.
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@changelog_1177_li
Terrence Huang has translated the error messages to Chinese. Thanks a lot!
@changelog_1177_li
@changelog_1178_li
TRUNC was added as an alias for TRUNCATE.
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@changelog_1179_li
Small optimisation for accessing result values by column name.
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@changelog_1180_li
Fix for bug in Statement.getMoreResults(int)
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The SCRIPT statements now supports filtering by schema and table. Thanks a lot to Jacob Qvortrup for providing the patch!
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Version 1.3.166 (2012-04-08)
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Indexes on column that are larger than half the page size (wide indexes) could sometimes get corrupt, resulting in an ArrayIndexOutOfBoundsException in PageBtree.getRow or "Row not found" in PageBtreeLeaf. Also, such indexes used too much disk space.
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Server mode: when retrieving more than 64 rows each containing a CLOB or BLOB, the error message "The object is already closed" was thrown.
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@changelog_1185_li
ConvertTraceFile: the time in the trace file is now parsed as a long.
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@changelog_1186_li
Invalid connection settings are now detected.
@changelog_1186_li
@changelog_1187_li
Issue 387: WHERE condition getting pushed into sub-query with LIMIT.
@changelog_1187_h2
@changelog_1188_h2
Version 1.3.165 (2012-03-18)
@changelog_1188_li
@changelog_1189_li
Better string representation for decimal values (for example 0.00000000 instead of 0E-26).
@changelog_1189_li
@changelog_1190_li
Prepared statements could only be re-used if the same data types were used the second time they were executed.
@changelog_1190_li
@changelog_1191_li
In error messages about referential constraint violation, the values are now included.
@changelog_1191_li
@changelog_1192_li
SCRIPT and RUNSCRIPT: the password can now be set using a prepared statement. Previously, it was required to be a literal in the SQL statement.
@changelog_1192_li
@changelog_1193_li
MySQL compatibility: SUBSTR with a negative start index now works like MySQL.
@changelog_1193_li
@changelog_1194_li
When enabling autocommit, the transaction is now committed (as required by the JDBC API).
@changelog_1194_li
@changelog_1195_li
The shell script <code>h2.sh</code> did not work with spaces in the path. It also works now with quoted spaces in the argument list. Thanks a lot to Shimizu Fumiyuki for the patch!
@changelog_1195_li
@changelog_1196_li
If the transaction log could not be truncated because of an uncommitted transaction, now "Transaction log could not be truncated" is written to the .trace.db file. Before, the database file was growing and it was hard to find out what the root cause was. To avoid the database file from growing, a new feature to automatically rollback the oldest transaction is available now. To enable it, append ;LOG_SIZE_LIMIT=32 to the database URL (in that case, the oldest session is rolled back if the transaction log is 32 MB).
@changelog_1196_li
@changelog_1197_li
ALTER TABLE ADD can now add more than one column at a time.
@changelog_1197_li
@changelog_1198_li
Issue 380: ALTER TABLE ADD FOREIGN KEY with an explicit index didn't verify the index can be used, which would lead to a NullPointerException later on.
@changelog_1198_li
@changelog_1199_li
Issue 384: the wrong kind of exception (NullPointerException) was thrown in a UNION query with an incorrect ORDER BY expression.
@changelog_1199_li
@changelog_1200_li
Issue 362: support LIMIT in UPDATE statements.
@changelog_1200_li
@changelog_1201_li
Browser: if no default browser is set, Google Chrome is now used if available. If not available, then Konqueror, Netscape, or Opera is used if available (as before).
@changelog_1201_li
@changelog_1202_li
CSV tool: new feature to disable writing the column header (option writeColumnHeader).
@changelog_1202_li
@changelog_1203_li
CSV tool: new feature to preserve the case sensitivity of column names (option caseSensitiveColumnNames).
@changelog_1203_li
@changelog_1204_li
PostgreSQL compatibility: LOG(x) is base 10 in the PostgreSQL mode.
The plan is to use the MVStore as the default storage engine for the H2 database in the future (supporting SQL, JDBC, transactions, MVCC, and so on). This is work in progress. To try it out, append <code>;MV_STORE=TRUE</code> to the database URL. In general, functionality and performance should be similar than the current default storage engine (the page store). There are a few features that have not been implemented yet or are not complete:
@mvstore_1109_li
There is still a file <code>.h2.db</code>, and the <code>.lock.db</code> file is still used to lock a database (long term, the plan is to no longer use those files).
The plan is to use the MVStore as the default storage engine for the H2 database in the future (supporting SQL, JDBC, transactions, MVCC, and so on). This is work in progress. To try it out, append <code>;MV_STORE=TRUE</code> to the database URL. In general, functionality and performance should be similar than the current default storage engine (the page store). There are a few features that have not been implemented yet or are not complete, for example there is still a file named <code>.h2.db</code>, and the <code>.lock.db</code> file is still used to lock a database (long term, the plan is to no longer use those files).
@mvstore_1110_li
The database file(s) sometimes do not shrink as expected.
@mvstore_1111_h2
@mvstore_1109_h2
Similar Projects and Differences to Other Storage Engines
@mvstore_1112_p
@mvstore_1110_p
Unlike similar storage engines like LevelDB and Kyoto Cabinet, the MVStore is written in Java and can easily be embedded in a Java and Android application.
@mvstore_1113_p
@mvstore_1111_p
The MVStore is somewhat similar to the Berkeley DB Java Edition because it is also written in Java, and is also a log structured storage, but the H2 license is more liberal.
@mvstore_1114_p
@mvstore_1112_p
Like SQLite 3, the MVStore keeps all data in one file. Unlike SQLite 3, the MVStore uses is a log structured storage. The plan is to make the MVStore both easier to use as well as faster than SQLite 3. In a recent (very simple) test, the MVStore was about twice as fast as SQLite 3 on Android.
@mvstore_1115_p
@mvstore_1113_p
The API of the MVStore is similar to MapDB (previously known as JDBM) from Jan Kotek, and some code is shared between MVStore and MapDB. However, unlike MapDB, the MVStore uses is a log structured storage. The MVStore does not have a record size limit.
@mvstore_1116_h2
@mvstore_1114_h2
Current State
@mvstore_1117_p
@mvstore_1115_p
The code is still experimental at this stage. The API as well as the behavior may partially change. Features may be added and removed (even thought the main features will stay).
@mvstore_1118_h2
@mvstore_1116_h2
Requirements
@mvstore_1119_p
@mvstore_1117_p
The MVStore is included in the latest H2 jar file.
@mvstore_1120_p
@mvstore_1118_p
There are no special requirements to use it. The MVStore should run on any JVM as well as on Android.
@mvstore_1121_p
@mvstore_1119_p
To build just the MVStore (without the database engine), run:
@mvstore_1122_p
@mvstore_1120_p
This will create the file <code>bin/h2mvstore-1.3.173.jar</code> (about 130 KB).
#Some small fixes to the GEOMETRY support, patches by Nicolas Fortin.
@changelog_1018_li
#When the H2 parser fails to parse a SQL statement, throw a more specific exception that contains extra information to make it possible for smart editors to do autocomplete. Patch from Nicolas Fortin.
#The BNF tool and the autocomplete feature are exported in OSGi, which makes it possible for smart editors to do autocomplete. Patch from Nicolas Fortin.
@changelog_1019_li
#Fix DROP ALL OBJECTS and DROP SCHEMA in the presence of tables with computed column dependencies.
...
...
@@ -1726,550 +1726,553 @@ Centralリ�?ジトリ�?�利用
@changelog_1021_li
#There was a bug where a hash index with more than one column would be silently converted to a regular index. It will now throw an exception.
@changelog_1022_h2
@changelog_1022_li
#Query Statistics: new feature which stores the newest 100 SQL queries executed and their performance data. Useful for tracking down badly performing queries.
@changelog_1023_h2
#Version 1.3.173 (2013-07-28)
@changelog_1023_li
@changelog_1024_li
#Support empty statements that just contains a comment.
@changelog_1024_li
@changelog_1025_li
#Server mode: if there was an error while reading from a LOB, the session was closed in some cases.
@changelog_1025_li
@changelog_1026_li
#Issue 463: Driver name and version are now the same in OsgiDataSourceFactory and JdbcDatabaseMetaData.
@changelog_1026_li
@changelog_1027_li
#JaQu: The data type VARCHAR is now (again) used for Strings (no longer TEXT, except when explicitly set).
@changelog_1027_li
@changelog_1028_li
#For in-memory databases, creating an index on a CLOB or BLOB column is no longer supported. This is to simplify the MVTableEngine.
#Issue 468: trunc(timestamp) could return the wrong value (+12 hours), and trunc(number) throw a NullPointerException.
@changelog_1030_li
@changelog_1031_li
#The expression trunc(number) threw a NullPointerException.
@changelog_1031_li
@changelog_1032_li
#Fixed a deadlock when updating LOB's concurrently. See TestLob.testDeadlock2().
@changelog_1032_li
@changelog_1033_li
#Fixed a deadlock related to very large temporary result sets.
@changelog_1033_li
@changelog_1034_li
#Add "-list" command line option to Shell tool so that result-list-mode can be triggered when reading from a file.
@changelog_1034_li
@changelog_1035_li
#Issue 474: H2 MySQL Compatibility code fails to ignore "COMMENT" in CREATE TABLE, patch from Aaron Azeckoski.
@changelog_1035_li
@changelog_1036_li
#Issue 476: Broken link in jaqu.html
@changelog_1036_li
@changelog_1037_li
#Fix potential UTF8 encoding issue in org.h2.store.FileStore, reported by Juerg Spiess.
@changelog_1037_li
@changelog_1038_li
#Improve error message when check constraint is broken, test case from Gili (cowwoc).
@changelog_1038_li
@changelog_1039_li
#Improve error message when we have a unique constraint violation, displays the offending key in the error message.
@changelog_1039_li
@changelog_1040_li
#Issue 478: Support for "SHOW TRANSACTION ISOLATION LEVEL", patch from Andrew Franklin.
@changelog_1040_li
@changelog_1041_li
#Issue 475: PgServer: add support for CancelRequest, patch from Andrew Franklin.
@changelog_1041_li
@changelog_1042_li
#Issue 473: PgServer missing -key option, patch from Andrew Franklin.
@changelog_1042_li
@changelog_1043_li
#Issue 471: CREATE VIEW does not check user rights, patch from Andrew Franklin.
@changelog_1043_li
@changelog_1044_li
#Issue 477: PgServer binary transmission of query params is unimplemented, patch from Andrew Franklin.
@changelog_1044_li
@changelog_1045_li
#Issue 479: Support for SUBSTRING without a FROM condition, patch from Andrew Franklin.
@changelog_1045_li
@changelog_1046_li
#Issue 472: PgServer does not work with any recent Postgres JDBC driver, patch from Andrew Franklin.
@changelog_1046_li
@changelog_1047_li
#Add syntax for passing additional parameters into custom TableEngine implementations.
@changelog_1047_li
@changelog_1048_li
#Issue 480: Bugfix post issue 475, 477, patch from Andrew Franklin.
@changelog_1048_li
@changelog_1049_li
#Issue 481: Further extensions to PgServer to support better support PG JDBC, patch from Andrew Franklin.
@changelog_1049_li
@changelog_1050_li
#Add support for spatial datatype GEOMETRY.
@changelog_1050_li
@changelog_1051_li
#Add support for in-memory spatial index.
@changelog_1051_li
@changelog_1052_li
#change the PageStore#changeCount field from an int to a long, to cope with databases with very high transaction rates.
@changelog_1052_li
@changelog_1053_li
#Fix a NullPointerException when attempting to add foreign key reference to a view.
@changelog_1053_li
@changelog_1054_li
#Add sufficient ClientInfo support to our javax.sql.Connection implementation to make WebSphere happy.
@changelog_1054_li
@changelog_1055_li
#Issue 482: class LobStorageBackend$LobInputStream does not override the method InputStream.available().
@changelog_1055_li
@changelog_1056_li
#Fix corruption resulting from a mix of the "WRITE_DELAY=0" option and "SELECT DISTINCT" queries that don't fit in memory.
@changelog_1056_li
@changelog_1057_li
#Fix the combination of updating a table which contains an LOB, and reading from the LOB at the same time. Previously it would throw an exception, now it works.
@changelog_1057_li
@changelog_1058_li
#Issue 484: In the H2 Console tool, all schemas starting with "INFO" where hidden. Now they are hidden only if the database is not H2. Patch from "mgcodeact"/"cumer d"
@changelog_1058_li
@changelog_1059_li
#MySQL compatibility, support the "AUTO_INCREMENT=3" part of the CREATE TABLE statement.
@changelog_1059_li
@changelog_1060_li
#Issue 486: MySQL compatibility, support the "DEFAULT CHARSET" part of the CREATE TABLE statement.
@changelog_1060_li
@changelog_1061_li
#Issue 487: support the MySQL "SET foreign_key_checks = 0" command
@changelog_1061_li
@changelog_1062_li
#Issue 490: support MySQL "USING BTREE" index declaration
@changelog_1062_li
@changelog_1063_li
#Issue 485: Database get corrupted when column is renamed for which check constraint was defined inside create table statement.
@changelog_1063_li
@changelog_1064_li
#Issue 499: support MySQL "UNIQUE KEY (ID) USING BTREE" constraint syntax
@changelog_1064_li
@changelog_1065_li
#Issue 501: "CREATE TABLE .. WITH" not serialized, patch from nico.devel
@changelog_1065_li
@changelog_1066_li
#Avoid problems with runtime-compiled ALIAS methods when people have set the JAVA_TOOL_OPTIONS environment variable.
@changelog_1066_h2
@changelog_1067_h2
#Version 1.3.172 (2013-05-25)
@changelog_1067_li
@changelog_1068_li
#Referential integrity: when adding a referential integrity constraint failed, and if creating the constraint automatically created an index, this index was not removed.
@changelog_1068_li
@changelog_1069_li
#The auto-analyze feature now only reads 1000 rows per table instead of 10000.
@changelog_1069_li
@changelog_1070_li
#The optimization for IN(...) queries combined with OR could result in a strange exception of the type "column x must be included in the group by list".
@changelog_1070_li
@changelog_1071_li
#Issue 454: Use Charset for type-safety.
@changelog_1071_li
@changelog_1072_li
#Queries with both LIMIT and OFFSET could throw an IllegalArgumentException.
@changelog_1072_li
@changelog_1073_li
#MVStore: multiple issues were fixed: 460, 461, 462, 464, 466.
@changelog_1073_li
@changelog_1074_li
#MVStore: larger stores (multiple GB) are now much faster.
@changelog_1074_li
@changelog_1075_li
#When using local temporary tables and not dropping them manually before closing the session, and then killing the process could result in a database that couldn't be opened (except when using the recover tool).
@changelog_1075_li
@changelog_1076_li
#Support TRUNC(timestamp) for improved Oracle compatibility.
@changelog_1076_li
@changelog_1077_li
#Add support for CREATE TABLE TEST (ID BIGSERIAL) for PostgreSQL compatibility. Patch from Jesse Long.
@changelog_1077_li
@changelog_1078_li
#Add new collation command SET BINARY_COLLATION UNSIGNED, helps with people testing BINARY columns in MySQL mode.
@changelog_1078_li
@changelog_1079_li
#Issue 453: ABBA race conditions in TABLE LINK connection sharing.
@changelog_1079_li
@changelog_1080_li
#Issue 449: Postgres Serial data type should not automatically be marked as primary key
@changelog_1080_li
@changelog_1081_li
#Issue 406: Support "select h2version()"
@changelog_1081_li
@changelog_1082_li
#Issue 389: When there is a multi-column primary key, H2 does not seem to always pick the right index
@changelog_1082_li
@changelog_1083_li
#Issue 305: Implement SELECT ... FOR FETCH ONLY
@changelog_1083_li
@changelog_1084_li
#Issue 274: Sybase/MSSQLServer compatibility - Add GETDATE and CHARINDEX system functions
@changelog_1084_li
@changelog_1085_li
#Issue 274: Sybase/MSSQLServer compatibility - swap parameters of CONVERT function.
@changelog_1085_li
@changelog_1086_li
#Issue 274: Sybase/MSSQLServer compatibility - support index clause e.g. "select * from test (index table1_index)"
@changelog_1086_li
@changelog_1087_li
#Fix bug in Optimizing SELECT * FROM A WHERE X=1 OR X=2 OR X=3 into SELECT * FROM A WHERE X IN (1,2,3)
@changelog_1087_li
@changelog_1088_li
#Issue 442: Groovy patch for SourceCompiler (function ALIAS)
@changelog_1088_li
@changelog_1089_li
#Issue 459: Improve LOB documentation
@changelog_1089_h2
@changelog_1090_h2
#Version 1.3.171 (2013-03-17)
@changelog_1090_li
@changelog_1091_li
#Security: the TCP server did not correctly restrict access rights of clients in some cases. This was specially a problem when using the flag "tcpAllowOthers".
@changelog_1091_li
@changelog_1092_li
#H2 Console: the session timeout can now be configured using the system property "h2.consoleTimeout".
@changelog_1092_li
@changelog_1093_li
#Issue 431: Improved compatibility with MySQL: support for "ENGINE=InnoDB charset=UTF8" when creating a table.
@changelog_1093_li
@changelog_1094_li
#Issue 249: Improved compatibility with MySQL in the MySQL mode: now the methods DatabaseMetaData methods stores*Case*Identifiers return the same as MySQL when using the MySQL mode.
@changelog_1094_li
@changelog_1095_li
#Issue 434: H2 Console didn't work in the Chrome browser due to a wrong viewport argument.
@changelog_1095_li
@changelog_1096_li
#There was a possibility that the .lock.db file was not deleted when the database was closed, which could slow down opening the database.
@changelog_1096_li
@changelog_1097_li
#The SQL script generated by the "script" command contained inconsistent newlines on Windows.
@changelog_1097_li
@changelog_1098_li
#When using trace level 4 (SLF4J) in the server mode, a directory "trace.db" and an empty file was created on the client side. This is no longer made.
@changelog_1098_li
@changelog_1099_li
#Optimize IN(...) queries: there was a bug in version 1.3.170 if the type of the left hand side didn't match the type of the right hand side. Fixed.
@changelog_1099_li
@changelog_1100_li
#Optimize IN(...) queries: there was a bug in version 1.3.170 for comparison of the type "X IN(NULL, NULL)". Fixed.
@changelog_1100_li
@changelog_1101_li
#Timestamps with timezone that were passed as a string were not always converted correctly. For example "2012-11-06T23:00:00.000Z" was converted to "2012-11-06" instead of to "2012-11-07" in the timezone CET. Thanks a lot to Steve Hruda for reporting the problem!
@changelog_1101_li
@changelog_1102_li
#New table engine "org.h2.mvstore.db.MVTableEngine" that internally uses the MVStore to persist data. To try it out, append ";DEFAULT_TABLE_ENGINE=org.h2.mvstore.db.MVTableEngine" to the database URL. This is still very experimental, and many features are not supported yet. The data is stored in a file with the suffix ".mv.db".
@changelog_1102_li
@changelog_1103_li
#New connection setting "DEFAULT_TABLE_ENGINE" to use a specific table engine if none is set explicitly. This is to simplify testing the MVStore table engine.
@changelog_1103_li
@changelog_1104_li
#MVStore: encrypted stores are now supported. Only standardized algorithms are used: PBKDF2, SHA-256, XTS-AES, AES-128.
@changelog_1104_li
@changelog_1105_li
#MVStore: improved API thanks to Simo Tripodi.
@changelog_1105_li
@changelog_1106_li
#MVStore: maps can now be renamed.
@changelog_1106_li
@changelog_1107_li
#MVStore: store the file header also at the end of each chunk, which results in a further reduced number of write operations.
@changelog_1107_li
@changelog_1108_li
#MVStore: a map implementation that supports concurrent operations.
@changelog_1108_li
@changelog_1109_li
#MVStore: unified exception handling; the version is included in the messages.
@changelog_1109_li
@changelog_1110_li
#MVStore: old data is now retained for 45 seconds by default.
@changelog_1110_li
@changelog_1111_li
#MVStore: compress is now disabled by default, and can be enabled on request.
@changelog_1111_li
@changelog_1112_li
#Support ALTER TABLE ADD ... AFTER. Patch from Andrew Gaul (argaul at gmail.com). Fixes issue 401.
@changelog_1112_li
@changelog_1113_li
#Improved OSGi support. H2 now registers itself as a DataSourceFactory service. Fixes issue 365.
@changelog_1113_li
@changelog_1114_li
#Add a DISK_SPACE_USED system function. Fixes issue 270.
@changelog_1114_li
@changelog_1115_li
#Fix a compile-time ambiguity when compiling with JDK7, thanks to a patch from Lukas Eder.
@changelog_1115_li
@changelog_1116_li
#Supporting dropping an index for Lucene full-text indexes.
@changelog_1116_li
@changelog_1117_li
#Optimized performance for SELECT ... ORDER BY X LIMIT Y OFFSET Z queries for in-memory databases using partial sort (by Sergi Vladykin).
@changelog_1117_li
@changelog_1118_li
#Experimental off-heap memory storage engine "nioMemFS:" and "nioMemLZF:", suggestion from Mark Addleman.
@changelog_1118_li
@changelog_1119_li
#Issue 438: JdbcDatabaseMetaData.getSchemas() is no longer supported as of 1.3.169.
@changelog_1119_li
@changelog_1120_li
#MySQL compatibility: support for ALTER TABLE tableName MODIFY [COLUMN] columnName columnDef. Patch from Ville Koskela.
@changelog_1120_li
@changelog_1121_li
#Issue 404: SHOW COLUMNS FROM tableName does not work with ALLOW_LITERALS=NUMBERS.
@changelog_1121_li
@changelog_1122_li
#Throw an explicit error to make it clear we don't support the TRIGGER combination of SELECT and FOR EACH ROW.
@changelog_1122_li
@changelog_1123_li
#Issue 439: Utils.sortTopN does not handle single-element arrays.
@changelog_1123_h2
@changelog_1124_h2
#Version 1.3.170 (2012-11-30)
@changelog_1124_li
@changelog_1125_li
#Issue 407: The TriggerAdapter didn't work with CLOB and BLOB columns.
@changelog_1125_li
@changelog_1126_li
#PostgreSQL compatibility: support for data types BIGSERIAL and SERIAL as an alias for AUTO_INCREMENT.
@changelog_1126_li
@changelog_1127_li
#Issue 417: H2 Console: the web session timeout didn't work, resulting in a memory leak. This was only a problem if the H2 Console was run for a long time and many sessions were opened.
@changelog_1127_li
@changelog_1128_li
#Issue 412: Running the Server tool with just the option "-browser" will now log a warning.
@changelog_1128_li
@changelog_1129_li
#Issue 411: CloseWatcher registration was not concurrency-safe.
@changelog_1129_li
@changelog_1130_li
#MySQL compatibility: support for CONCAT_WS. Thanks a lot to litailang for the patch!
@changelog_1130_li
@changelog_1131_li
#PostgreSQL compatibility: support for EXTRACT(WEEK FROM dateColumn). Thanks to Prashant Bhat for the patch!
@changelog_1131_li
@changelog_1132_li
#Fix for a bug where we would sometimes use the wrong unique constraint to validate foreign key constraints.
@changelog_1132_li
@changelog_1133_li
#Support BOM at the beginning of files for the RUNSCRIPT command
@changelog_1133_li
@changelog_1134_li
#Fix in calling SET @X = IDENTITY() where it would return NULL incorrectly
@changelog_1134_li
@changelog_1135_li
#Fix ABBA deadlock between adding a constraint and the H2-Log-Writer thread.
@changelog_1135_li
@changelog_1136_li
#Optimize IN(...) queries where the values are constant and of the same type.
@changelog_1136_li
@changelog_1137_li
#Restore tool: the parameter "quiet" was not used and is now removed.
@changelog_1137_li
@changelog_1138_li
#Fix ConcurrentModificationException when creating tables and executing SHOW TABLES in parallel. Reported by Viktor Voytovych.
@changelog_1138_li
@changelog_1139_li
#Serialization is now pluggable using the system property "h2.javaObjectSerializer". Thanks to Sergi Vladykin for the patch!
@changelog_1139_h2
@changelog_1140_h2
#Version 1.3.169 (2012-09-09)
@changelog_1140_li
@changelog_1141_li
#The default jar file is now compiled for Java 6.
@changelog_1141_li
@changelog_1142_li
#The new jar file will probably not end up in the central Maven repository in the next few weeks because Sonatype has disabled automatic synchronization from SourceForge (which they call 'legacy sync' now). It will probably take some time until this is sorted out. The H2 jar files are deployed to http://h2database.com/m2-repo/com/h2database/h2/maven-metadata.xml and http://hsql.sourceforge.net/m2-repo/com/h2database/h2/maven-metadata.xml as usual.
@changelog_1142_li
@changelog_1143_li
#A part of the documentation and the H2 Console has been changed to support the Apple retina display.
@changelog_1143_li
@changelog_1144_li
#The CreateCluster tool could not be used if the source database contained a CLOB or BLOB. The root cause was that the TCP server did not synchronize on the session, which caused a problem when using the exclusive mode.
@changelog_1144_li
@changelog_1145_li
#Statement.getQueryTimeout(): only the first call to this method will query the database. If the query timeout was changed in another way than calling setQueryTimeout, this method will always return the last value. This was changed because Hibernate calls getQueryTimeout() a lot.
@changelog_1145_li
@changelog_1146_li
#Issue 416: PreparedStatement.setNString throws AbstractMethodError. All implemented JDBC 4 methods that don't break compatibility with Java 5 are now included in the default jar file.
@changelog_1146_li
@changelog_1147_li
#Issue 414: for some functions, the parameters were evaluated twice (for example "char(nextval(..))" ran "nextval(..)" twice).
@changelog_1147_li
@changelog_1148_li
#The ResultSetMetaData methods getSchemaName and getTableName could return null instead of "" (an empty string) as specified in the JDBC API.
@changelog_1148_li
@changelog_1149_li
#Added compatibility for "SET NAMES" query in MySQL compatibility mode.
@changelog_1149_h2
@changelog_1150_h2
#Version 1.3.168 (2012-07-13)
@changelog_1150_li
@changelog_1151_li
#The message "Transaction log could not be truncated" was sometimes written to the .trace.db file even if there was no problem truncating the transaction log.
@changelog_1151_li
@changelog_1152_li
#New system property "h2.serializeJavaObject" (default: true) that allows to disable serializing Java objects, so that the objects compareTo and toString methods can be used.
@changelog_1152_li
@changelog_1153_li
#Dylan has translated the H2 Console tool to Korean. Thanks a lot!
@changelog_1153_li
@changelog_1154_li
#Executing the statement CREATE INDEX IF ALREADY EXISTS if the index already exists no longer fails for a read only database.
@changelog_1154_li
@changelog_1155_li
#MVCC: concurrently updating a row could result in the row to appear deleted in the second connection, if there are multiple unique indexes (or a primary key and at least one unique index). Thanks a lot to Teruo for the patch!
@changelog_1155_li
@changelog_1156_li
#Fulltext search: in-memory Lucene indexes are now supported.
@changelog_1156_li
@changelog_1157_li
#Fulltext search: UUID primary keys are now supported.
@changelog_1157_li
@changelog_1158_li
#Apache Tomcat 7.x will now longer log a warning when unloading the web application, if using a connection pool.
@changelog_1158_li
@changelog_1159_li
#H2 Console: support the Midori browser (for Debian / Raspberry Pi)
@changelog_1159_li
@changelog_1160_li
#When opening a remote session, don't open a temporary file if the trace level is set to zero
@changelog_1160_li
@changelog_1161_li
#Use HMAC for authenticating remote LOB id's, removing the need for maintaining a cache, and removing the limit on the number of LOBs per result set.
@changelog_1161_li
@changelog_1162_li
#H2 Console: HTML and XML documents can now be edited in an updatable result set. There is (limited) support for editing multi-line documents.
@changelog_1162_h2
@changelog_1163_h2
#Version 1.3.167 (2012-05-23)
@changelog_1163_li
@changelog_1164_li
#H2 Console: when editing a row, an empty varchar column was replaced with a single space.
@changelog_1164_li
@changelog_1165_li
#Lukas Eder has updated the jOOQ documentation.
@changelog_1165_li
@changelog_1166_li
#Some nested joins could not be executed, for example: select * from (select * from (select * from a) a right join b b) c;
@changelog_1166_li
@changelog_1167_li
#MS SQL Server compatibility: ISNULL is now an alias for IFNULL.
@changelog_1167_li
@changelog_1168_li
#Terrence Huang has completed the translation of the H2 Console tool to Chinese. Thanks a lot!
@changelog_1168_li
@changelog_1169_li
#Server mode: the number of CLOB / BLOB values that were cached on the server is now the maximum of: 5 times the SERVER_RESULT_SET_FETCH_SIZE (which is 100 by default), and SysProperties.SERVER_CACHED_OBJECTS.
@changelog_1169_li
@changelog_1170_li
#In the trace file, the query execution time was incorrect in some cases, specially for the statement SET TRACE_LEVEL_FILE 2.
@changelog_1170_li
@changelog_1171_li
#The feature LOG_SIZE_LIMIT that was introduced in version 1.3.165 did not always work correctly (specially with regards to multithreading) and has been removed. The message "Transaction log could not be truncated" is still written to the .trace.db file if required.
@changelog_1171_li
@changelog_1172_li
#Then reading from a resource using the prefix "classpath:", the ContextClassLoader is now used if the resource can't be read otherwise.
@changelog_1172_li
@changelog_1173_li
#DatabaseEventListener now calls setProgress whenever a statement starts and ends.
@changelog_1173_li
@changelog_1174_li
#DatabaseEventListener now calls setProgress periodically while a statement is running.
@changelog_1174_li
@changelog_1175_li
#The table INFORMATION_SCHEMA.FUNCTION_ALIASES now includes a column TYPE_NAME.
@changelog_1175_li
@changelog_1176_li
#Issue 378: when using views, the wrong values were bound to a parameter in some cases.
@changelog_1176_li
@changelog_1177_li
#Terrence Huang has translated the error messages to Chinese. Thanks a lot!
@changelog_1177_li
@changelog_1178_li
#TRUNC was added as an alias for TRUNCATE.
@changelog_1178_li
@changelog_1179_li
#Small optimisation for accessing result values by column name.
@changelog_1179_li
@changelog_1180_li
#Fix for bug in Statement.getMoreResults(int)
@changelog_1180_li
@changelog_1181_li
#The SCRIPT statements now supports filtering by schema and table. Thanks a lot to Jacob Qvortrup for providing the patch!
@changelog_1181_h2
@changelog_1182_h2
#Version 1.3.166 (2012-04-08)
@changelog_1182_li
@changelog_1183_li
#Indexes on column that are larger than half the page size (wide indexes) could sometimes get corrupt, resulting in an ArrayIndexOutOfBoundsException in PageBtree.getRow or "Row not found" in PageBtreeLeaf. Also, such indexes used too much disk space.
@changelog_1183_li
@changelog_1184_li
#Server mode: when retrieving more than 64 rows each containing a CLOB or BLOB, the error message "The object is already closed" was thrown.
@changelog_1184_li
@changelog_1185_li
#ConvertTraceFile: the time in the trace file is now parsed as a long.
@changelog_1185_li
@changelog_1186_li
#Invalid connection settings are now detected.
@changelog_1186_li
@changelog_1187_li
#Issue 387: WHERE condition getting pushed into sub-query with LIMIT.
@changelog_1187_h2
@changelog_1188_h2
#Version 1.3.165 (2012-03-18)
@changelog_1188_li
@changelog_1189_li
#Better string representation for decimal values (for example 0.00000000 instead of 0E-26).
@changelog_1189_li
@changelog_1190_li
#Prepared statements could only be re-used if the same data types were used the second time they were executed.
@changelog_1190_li
@changelog_1191_li
#In error messages about referential constraint violation, the values are now included.
@changelog_1191_li
@changelog_1192_li
#SCRIPT and RUNSCRIPT: the password can now be set using a prepared statement. Previously, it was required to be a literal in the SQL statement.
@changelog_1192_li
@changelog_1193_li
#MySQL compatibility: SUBSTR with a negative start index now works like MySQL.
@changelog_1193_li
@changelog_1194_li
#When enabling autocommit, the transaction is now committed (as required by the JDBC API).
@changelog_1194_li
@changelog_1195_li
#The shell script <code>h2.sh</code> did not work with spaces in the path. It also works now with quoted spaces in the argument list. Thanks a lot to Shimizu Fumiyuki for the patch!
@changelog_1195_li
@changelog_1196_li
#If the transaction log could not be truncated because of an uncommitted transaction, now "Transaction log could not be truncated" is written to the .trace.db file. Before, the database file was growing and it was hard to find out what the root cause was. To avoid the database file from growing, a new feature to automatically rollback the oldest transaction is available now. To enable it, append ;LOG_SIZE_LIMIT=32 to the database URL (in that case, the oldest session is rolled back if the transaction log is 32 MB).
@changelog_1196_li
@changelog_1197_li
#ALTER TABLE ADD can now add more than one column at a time.
@changelog_1197_li
@changelog_1198_li
#Issue 380: ALTER TABLE ADD FOREIGN KEY with an explicit index didn't verify the index can be used, which would lead to a NullPointerException later on.
@changelog_1198_li
@changelog_1199_li
#Issue 384: the wrong kind of exception (NullPointerException) was thrown in a UNION query with an incorrect ORDER BY expression.
@changelog_1199_li
@changelog_1200_li
#Issue 362: support LIMIT in UPDATE statements.
@changelog_1200_li
@changelog_1201_li
#Browser: if no default browser is set, Google Chrome is now used if available. If not available, then Konqueror, Netscape, or Opera is used if available (as before).
@changelog_1201_li
@changelog_1202_li
#CSV tool: new feature to disable writing the column header (option writeColumnHeader).
@changelog_1202_li
@changelog_1203_li
#CSV tool: new feature to preserve the case sensitivity of column names (option caseSensitiveColumnNames).
@changelog_1203_li
@changelog_1204_li
#PostgreSQL compatibility: LOG(x) is base 10 in the PostgreSQL mode.
@cheatSheet_1000_h1
...
...
@@ -7205,48 +7208,42 @@ H2 データベース エンジン
#Table Engine for H2
@mvstore_1108_p
# The plan is to use the MVStore as the default storage engine for the H2 database in the future (supporting SQL, JDBC, transactions, MVCC, and so on). This is work in progress. To try it out, append <code>;MV_STORE=TRUE</code> to the database URL. In general, functionality and performance should be similar than the current default storage engine (the page store). There are a few features that have not been implemented yet or are not complete:
@mvstore_1109_li
#There is still a file <code>.h2.db</code>, and the <code>.lock.db</code> file is still used to lock a database (long term, the plan is to no longer use those files).
# The plan is to use the MVStore as the default storage engine for the H2 database in the future (supporting SQL, JDBC, transactions, MVCC, and so on). This is work in progress. To try it out, append <code>;MV_STORE=TRUE</code> to the database URL. In general, functionality and performance should be similar than the current default storage engine (the page store). There are a few features that have not been implemented yet or are not complete, for example there is still a file named <code>.h2.db</code>, and the <code>.lock.db</code> file is still used to lock a database (long term, the plan is to no longer use those files).
@mvstore_1110_li
#The database file(s) sometimes do not shrink as expected.
@mvstore_1111_h2
@mvstore_1109_h2
#Similar Projects and Differences to Other Storage Engines
@mvstore_1112_p
@mvstore_1110_p
# Unlike similar storage engines like LevelDB and Kyoto Cabinet, the MVStore is written in Java and can easily be embedded in a Java and Android application.
@mvstore_1113_p
@mvstore_1111_p
# The MVStore is somewhat similar to the Berkeley DB Java Edition because it is also written in Java, and is also a log structured storage, but the H2 license is more liberal.
@mvstore_1114_p
@mvstore_1112_p
# Like SQLite 3, the MVStore keeps all data in one file. Unlike SQLite 3, the MVStore uses is a log structured storage. The plan is to make the MVStore both easier to use as well as faster than SQLite 3. In a recent (very simple) test, the MVStore was about twice as fast as SQLite 3 on Android.
@mvstore_1115_p
@mvstore_1113_p
# The API of the MVStore is similar to MapDB (previously known as JDBM) from Jan Kotek, and some code is shared between MVStore and MapDB. However, unlike MapDB, the MVStore uses is a log structured storage. The MVStore does not have a record size limit.
@mvstore_1116_h2
@mvstore_1114_h2
#Current State
@mvstore_1117_p
@mvstore_1115_p
# The code is still experimental at this stage. The API as well as the behavior may partially change. Features may be added and removed (even thought the main features will stay).
@mvstore_1118_h2
@mvstore_1116_h2
必�?�?�件
@mvstore_1119_p
@mvstore_1117_p
# The MVStore is included in the latest H2 jar file.
@mvstore_1120_p
@mvstore_1118_p
# There are no special requirements to use it. The MVStore should run on any JVM as well as on Android.
@mvstore_1121_p
@mvstore_1119_p
# To build just the MVStore (without the database engine), run:
@mvstore_1122_p
@mvstore_1120_p
# This will create the file <code>bin/h2mvstore-1.3.173.jar</code> (about 130 KB).
@@ -570,192 +570,193 @@ changelog_1014_li=New feature from Davide Cavestro - allow using custom Java obj
changelog_1015_li=When running the Recover tool on very large (>6G) databases, some statistics were reported with negative numbers.
changelog_1016_li=Add a CONTAINS_UNCOMMITTED column to the SESSIONS metadata table, to allow detecting when rogue sessions are creating large transactions.
changelog_1017_li=Some small fixes to the GEOMETRY support, patches by Nicolas Fortin.
changelog_1018_li=When the H2 parser fails to parse a SQL statement, throw a more specific exception that contains extra information to make it possible for smart editors to do autocomplete. Patch from Nicolas Fortin.
changelog_1018_li=The BNF tool and the autocomplete feature are exported in OSGi, which makes it possible for smart editors to do autocomplete. Patch from Nicolas Fortin.
changelog_1019_li=Fix DROP ALL OBJECTS and DROP SCHEMA in the presence of tables with computed column dependencies.
changelog_1020_li=Session-temporary LOB's could sometimes accumulate, increasing the size of the DB file until shutdown. Now they are cleared out at every commit.
changelog_1021_li=There was a bug where a hash index with more than one column would be silently converted to a regular index. It will now throw an exception.
changelog_1022_h2=Version 1.3.173 (2013-07-28)
changelog_1023_li=Support empty statements that just contains a comment.
changelog_1024_li=Server mode\:if there was an error while reading from a LOB, the session was closed in some cases.
changelog_1025_li=Issue 463\:Driver name and version are now the same in OsgiDataSourceFactory and JdbcDatabaseMetaData.
changelog_1026_li=JaQu\:The data type VARCHAR is now (again) used for Strings (no longer TEXT, except when explicitly set).
changelog_1027_li=For in-memory databases, creating an index on a CLOB or BLOB column is no longer supported. This is to simplify the MVTableEngine.
changelog_1029_li=Issue 468\:trunc(timestamp) could return the wrong value (+12 hours), and trunc(number) throw a NullPointerException.
changelog_1030_li=The expression trunc(number) threw a NullPointerException.
changelog_1031_li=Fixed a deadlock when updating LOB's concurrently. See TestLob.testDeadlock2().
changelog_1032_li=Fixed a deadlock related to very large temporary result sets.
changelog_1033_li=Add "-list" command line option to Shell tool so that result-list-mode can be triggered when reading from a file.
changelog_1034_li=Issue 474\:H2 MySQL Compatibility code fails to ignore "COMMENT" in CREATE TABLE, patch from Aaron Azeckoski.
changelog_1035_li=Issue 476\:Broken link in jaqu.html
changelog_1036_li=Fix potential UTF8 encoding issue in org.h2.store.FileStore, reported by Juerg Spiess.
changelog_1037_li=Improve error message when check constraint is broken, test case from Gili (cowwoc).
changelog_1038_li=Improve error message when we have a unique constraint violation, displays the offending key in the error message.
changelog_1039_li=Issue 478\:Support for "SHOW TRANSACTION ISOLATION LEVEL", patch from Andrew Franklin.
changelog_1040_li=Issue 475\:PgServer\:add support for CancelRequest, patch from Andrew Franklin.
changelog_1041_li=Issue 473\:PgServer missing -key option, patch from Andrew Franklin.
changelog_1042_li=Issue 471\:CREATE VIEW does not check user rights, patch from Andrew Franklin.
changelog_1043_li=Issue 477\:PgServer binary transmission of query params is unimplemented, patch from Andrew Franklin.
changelog_1044_li=Issue 479\:Support for SUBSTRING without a FROM condition, patch from Andrew Franklin.
changelog_1045_li=Issue 472\:PgServer does not work with any recent Postgres JDBC driver, patch from Andrew Franklin.
changelog_1046_li=Add syntax for passing additional parameters into custom TableEngine implementations.
changelog_1047_li=Issue 480\:Bugfix post issue 475, 477, patch from Andrew Franklin.
changelog_1048_li=Issue 481\:Further extensions to PgServer to support better support PG JDBC, patch from Andrew Franklin.
changelog_1049_li=Add support for spatial datatype GEOMETRY.
changelog_1050_li=Add support for in-memory spatial index.
changelog_1051_li=change the PageStore\#changeCount field from an int to a long, to cope with databases with very high transaction rates.
changelog_1052_li=Fix a NullPointerException when attempting to add foreign key reference to a view.
changelog_1053_li=Add sufficient ClientInfo support to our javax.sql.Connection implementation to make WebSphere happy.
changelog_1054_li=Issue 482\:class LobStorageBackend$LobInputStream does not override the method InputStream.available().
changelog_1055_li=Fix corruption resulting from a mix of the "WRITE_DELAY\=0" option and "SELECT DISTINCT" queries that don't fit in memory.
changelog_1056_li=Fix the combination of updating a table which contains an LOB, and reading from the LOB at the same time. Previously it would throw an exception, now it works.
changelog_1057_li=Issue 484\:In the H2 Console tool, all schemas starting with "INFO" where hidden. Now they are hidden only if the database is not H2. Patch from "mgcodeact"/"cumer d"
changelog_1058_li=MySQL compatibility, support the "AUTO_INCREMENT\=3" part of the CREATE TABLE statement.
changelog_1059_li=Issue 486\:MySQL compatibility, support the "DEFAULT CHARSET" part of the CREATE TABLE statement.
changelog_1060_li=Issue 487\:support the MySQL "SET foreign_key_checks \=0" command
changelog_1061_li=Issue 490\:support MySQL "USING BTREE" index declaration
changelog_1062_li=Issue 485\:Database get corrupted when column is renamed for which check constraint was defined inside create table statement.
changelog_1063_li=Issue 499\:support MySQL "UNIQUE KEY (ID) USING BTREE" constraint syntax
changelog_1064_li=Issue 501\:"CREATE TABLE .. WITH"not serialized, patch from nico.devel
changelog_1065_li=Avoid problems with runtime-compiled ALIAS methods when people have set the JAVA_TOOL_OPTIONS environment variable.
changelog_1066_h2=Version 1.3.172 (2013-05-25)
changelog_1067_li=Referential integrity\:when adding a referential integrity constraint failed, and if creating the constraint automatically created an index, this index was not removed.
changelog_1068_li=The auto-analyze feature now only reads 1000 rows per table instead of 10000.
changelog_1069_li=The optimization for IN(...) queries combined with OR could result in a strange exception of the type "column x must be included in the group by list".
changelog_1070_li=Issue 454\:Use Charset for type-safety.
changelog_1071_li=Queries with both LIMIT and OFFSET could throw an IllegalArgumentException.
changelog_1072_li=MVStore\:multiple issues were fixed\:460, 461, 462, 464, 466.
changelog_1073_li=MVStore\:larger stores (multiple GB) are now much faster.
changelog_1074_li=When using local temporary tables and not dropping them manually before closing the session, and then killing the process could result in a database that couldn't be opened (except when using the recover tool).
changelog_1075_li=Support TRUNC(timestamp) for improved Oracle compatibility.
changelog_1076_li=Add support for CREATE TABLE TEST (ID BIGSERIAL) for PostgreSQL compatibility. Patch from Jesse Long.
changelog_1077_li=Add new collation command SET BINARY_COLLATION UNSIGNED, helps with people testing BINARY columns in MySQL mode.
changelog_1078_li=Issue 453\:ABBA race conditions in TABLE LINK connection sharing.
changelog_1079_li=Issue 449\:Postgres Serial data type should not automatically be marked as primary key
changelog_1090_li=Security\:the TCP server did not correctly restrict access rights of clients in some cases. This was specially a problem when using the flag "tcpAllowOthers".
changelog_1091_li=H2 Console\:the session timeout can now be configured using the system property "h2.consoleTimeout".
changelog_1092_li=Issue 431\:Improved compatibility with MySQL\:support for "ENGINE\=InnoDB charset\=UTF8" when creating a table.
changelog_1093_li=Issue 249\:Improved compatibility with MySQL in the MySQL mode\:now the methods DatabaseMetaData methods stores*Case*Identifiers return the same as MySQL when using the MySQL mode.
changelog_1094_li=Issue 434\:H2 Console didn't work in the Chrome browser due to a wrong viewport argument.
changelog_1095_li=There was a possibility that the .lock.db file was not deleted when the database was closed, which could slow down opening the database.
changelog_1096_li=The SQL script generated by the "script" command contained inconsistent newlines on Windows.
changelog_1097_li=When using trace level 4 (SLF4J) in the server mode, a directory "trace.db" and an empty file was created on the client side. This is no longer made.
changelog_1098_li=Optimize IN(...) queries\:there was a bug in version 1.3.170 if the type of the left hand side didn't match the type of the right hand side. Fixed.
changelog_1099_li=Optimize IN(...) queries\:there was a bug in version 1.3.170 for comparison of the type "X IN(NULL, NULL)". Fixed.
changelog_1100_li=Timestamps with timezone that were passed as a string were not always converted correctly. For example "2012-11-06T23\:00\:00.000Z" was converted to "2012-11-06" instead of to "2012-11-07" in the timezone CET. Thanks a lot to Steve Hruda for reporting the problem\!
changelog_1101_li=New table engine "org.h2.mvstore.db.MVTableEngine" that internally uses the MVStore to persist data. To try it out, append ";DEFAULT_TABLE_ENGINE\=org.h2.mvstore.db.MVTableEngine" to the database URL. This is still very experimental, and many features are not supported yet. The data is stored in a file with the suffix ".mv.db".
changelog_1102_li=New connection setting "DEFAULT_TABLE_ENGINE" to use a specific table engine if none is set explicitly. This is to simplify testing the MVStore table engine.
changelog_1103_li=MVStore\:encrypted stores are now supported. Only standardized algorithms are used\:PBKDF2, SHA-256, XTS-AES, AES-128.
changelog_1104_li=MVStore\:improved API thanks to Simo Tripodi.
changelog_1105_li=MVStore\:maps can now be renamed.
changelog_1106_li=MVStore\:store the file header also at the end of each chunk, which results in a further reduced number of write operations.
changelog_1107_li=MVStore\:a map implementation that supports concurrent operations.
changelog_1108_li=MVStore\:unified exception handling; the version is included in the messages.
changelog_1109_li=MVStore\:old data is now retained for 45 seconds by default.
changelog_1110_li=MVStore\:compress is now disabled by default, and can be enabled on request.
changelog_1111_li=Support ALTER TABLE ADD ... AFTER. Patch from Andrew Gaul (argaul at gmail.com). Fixes issue 401.
changelog_1112_li=Improved OSGi support. H2 now registers itself as a DataSourceFactory service. Fixes issue 365.
changelog_1113_li=Add a DISK_SPACE_USED system function. Fixes issue 270.
changelog_1114_li=Fix a compile-time ambiguity when compiling with JDK7, thanks to a patch from Lukas Eder.
changelog_1115_li=Supporting dropping an index for Lucene full-text indexes.
changelog_1116_li=Optimized performance for SELECT ... ORDER BY X LIMIT Y OFFSET Z queries for in-memory databases using partial sort (by Sergi Vladykin).
changelog_1117_li=Experimental off-heap memory storage engine "nioMemFS\:" and "nioMemLZF\:", suggestion from Mark Addleman.
changelog_1118_li=Issue 438\: JdbcDatabaseMetaData.getSchemas() is no longer supported as of 1.3.169.
changelog_1119_li=MySQL compatibility\: support for ALTER TABLE tableName MODIFY [COLUMN] columnName columnDef. Patch from Ville Koskela.
changelog_1120_li=Issue 404\: SHOW COLUMNS FROM tableName does not work with ALLOW_LITERALS\=NUMBERS.
changelog_1121_li=Throw an explicit error to make it clear we don't support the TRIGGER combination of SELECT and FOR EACH ROW.
changelog_1122_li=Issue 439\: Utils.sortTopN does not handle single-element arrays.
changelog_1123_h2=Version 1.3.170 (2012-11-30)
changelog_1124_li=Issue 407\: The TriggerAdapter didn't work with CLOB and BLOB columns.
changelog_1125_li=PostgreSQL compatibility\: support for data types BIGSERIAL and SERIAL as an alias for AUTO_INCREMENT.
changelog_1126_li=Issue 417\: H2 Console\: the web session timeout didn't work, resulting in a memory leak. This was only a problem if the H2 Console was run for a long time and many sessions were opened.
changelog_1127_li=Issue 412\: Running the Server tool with just the option "-browser" will now log a warning.
changelog_1128_li=Issue 411\:CloseWatcher registration was not concurrency-safe.
changelog_1129_li=MySQL compatibility\:support for CONCAT_WS. Thanks a lot to litailang for the patch\!
changelog_1130_li=PostgreSQL compatibility\:support for EXTRACT(WEEK FROM dateColumn). Thanks to Prashant Bhat for the patch\!
changelog_1131_li=Fix for a bug where we would sometimes use the wrong unique constraint to validate foreign key constraints.
changelog_1132_li=Support BOM at the beginning of files for the RUNSCRIPT command
changelog_1133_li=Fix in calling SET @X \=IDENTITY() where it would return NULL incorrectly
changelog_1134_li=Fix ABBA deadlock between adding a constraint and the H2-Log-Writer thread.
changelog_1135_li=Optimize IN(...) queries where the values are constant and of the same type.
changelog_1136_li=Restore tool\:the parameter "quiet" was not used and is now removed.
changelog_1137_li=Fix ConcurrentModificationException when creating tables and executing SHOW TABLES in parallel. Reported by Viktor Voytovych.
changelog_1138_li=Serialization is now pluggable using the system property "h2.javaObjectSerializer". Thanks to Sergi Vladykin for the patch\!
changelog_1139_h2=Version 1.3.169 (2012-09-09)
changelog_1140_li=The default jar file is now compiled for Java 6.
changelog_1141_li=The new jar file will probably not end up in the central Maven repository in the next few weeks because Sonatype has disabled automatic synchronization from SourceForge (which they call 'legacy sync' now). It will probably take some time until this is sorted out. The H2 jar files are deployed to http\://h2database.com/m2-repo/com/h2database/h2/maven-metadata.xml and http\://hsql.sourceforge.net/m2-repo/com/h2database/h2/maven-metadata.xml as usual.
changelog_1142_li=A part of the documentation and the H2 Console has been changed to support the Apple retina display.
changelog_1143_li=The CreateCluster tool could not be used if the source database contained a CLOB or BLOB. The root cause was that the TCP server did not synchronize on the session, which caused a problem when using the exclusive mode.
changelog_1144_li=Statement.getQueryTimeout()\:only the first call to this method will query the database. If the query timeout was changed in another way than calling setQueryTimeout, this method will always return the last value. This was changed because Hibernate calls getQueryTimeout() a lot.
changelog_1145_li=Issue 416\:PreparedStatement.setNString throws AbstractMethodError. All implemented JDBC 4 methods that don't break compatibility with Java 5 are now included in the default jar file.
changelog_1146_li=Issue 414\:for some functions, the parameters were evaluated twice (for example "char(nextval(..))" ran "nextval(..)" twice).
changelog_1147_li=The ResultSetMetaData methods getSchemaName and getTableName could return null instead of "" (an empty string) as specified in the JDBC API.
changelog_1148_li=Added compatibility for "SET NAMES" query in MySQL compatibility mode.
changelog_1149_h2=Version 1.3.168 (2012-07-13)
changelog_1150_li=The message "Transaction log could not be truncated" was sometimes written to the .trace.db file even if there was no problem truncating the transaction log.
changelog_1151_li=New system property "h2.serializeJavaObject" (default\:true) that allows to disable serializing Java objects, so that the objects compareTo and toString methods can be used.
changelog_1152_li=Dylan has translated the H2 Console tool to Korean. Thanks a lot\!
changelog_1153_li=Executing the statement CREATE INDEX IF ALREADY EXISTS if the index already exists no longer fails for a read only database.
changelog_1154_li=MVCC\:concurrently updating a row could result in the row to appear deleted in the second connection, if there are multiple unique indexes (or a primary key and at least one unique index). Thanks a lot to Teruo for the patch\!
changelog_1155_li=Fulltext search\:in-memory Lucene indexes are now supported.
changelog_1156_li=Fulltext search\:UUID primary keys are now supported.
changelog_1157_li=Apache Tomcat 7.x will now longer log a warning when unloading the web application, if using a connection pool.
changelog_1158_li=H2 Console\:support the Midori browser (for Debian / Raspberry Pi)
changelog_1159_li=When opening a remote session, don't open a temporary file if the trace level is set to zero
changelog_1160_li=Use HMAC for authenticating remote LOB id's, removing the need for maintaining a cache, and removing the limit on the number of LOBs per result set.
changelog_1161_li=H2 Console\:HTML and XML documents can now be edited in an updatable result set. There is (limited) support for editing multi-line documents.
changelog_1162_h2=Version 1.3.167 (2012-05-23)
changelog_1163_li=H2 Console\:when editing a row, an empty varchar column was replaced with a single space.
changelog_1164_li=Lukas Eder has updated the jOOQ documentation.
changelog_1165_li=Some nested joins could not be executed, for example\:select * from (select * from (select * from a) a right join b b) c;
changelog_1166_li=MS SQL Server compatibility\:ISNULL is now an alias for IFNULL.
changelog_1167_li=Terrence Huang has completed the translation of the H2 Console tool to Chinese. Thanks a lot\!
changelog_1168_li=Server mode\:the number of CLOB / BLOB values that were cached on the server is now the maximum of\:5 times the SERVER_RESULT_SET_FETCH_SIZE (which is 100 by default), and SysProperties.SERVER_CACHED_OBJECTS.
changelog_1169_li=In the trace file, the query execution time was incorrect in some cases, specially for the statement SET TRACE_LEVEL_FILE 2.
changelog_1170_li=The feature LOG_SIZE_LIMIT that was introduced in version 1.3.165 did not always work correctly (specially with regards to multithreading) and has been removed. The message "Transaction log could not be truncated" is still written to the .trace.db file if required.
changelog_1171_li=Then reading from a resource using the prefix "classpath\:", the ContextClassLoader is now used if the resource can't be read otherwise.
changelog_1172_li=DatabaseEventListener now calls setProgress whenever a statement starts and ends.
changelog_1173_li=DatabaseEventListener now calls setProgress periodically while a statement is running.
changelog_1174_li=The table INFORMATION_SCHEMA.FUNCTION_ALIASES now includes a column TYPE_NAME.
changelog_1175_li=Issue 378\: when using views, the wrong values were bound to a parameter in some cases.
changelog_1176_li=Terrence Huang has translated the error messages to Chinese. Thanks a lot\!
changelog_1177_li=TRUNC was added as an alias for TRUNCATE.
changelog_1178_li=Small optimisation for accessing result values by column name.
changelog_1179_li=Fix for bug in Statement.getMoreResults(int)
changelog_1180_li=The SCRIPT statements now supports filtering by schema and table. Thanks a lot to Jacob Qvortrup for providing the patch\!
changelog_1181_h2=Version 1.3.166 (2012-04-08)
changelog_1182_li=Indexes on column that are larger than half the page size (wide indexes) could sometimes get corrupt, resulting in an ArrayIndexOutOfBoundsException in PageBtree.getRow or "Row not found" in PageBtreeLeaf. Also, such indexes used too much disk space.
changelog_1183_li=Server mode\:when retrieving more than 64 rows each containing a CLOB or BLOB, the error message "The object is already closed" was thrown.
changelog_1184_li=ConvertTraceFile\:the time in the trace file is now parsed as a long.
changelog_1185_li=Invalid connection settings are now detected.
changelog_1186_li=Issue 387\:WHERE condition getting pushed into sub-query with LIMIT.
changelog_1187_h2=Version 1.3.165 (2012-03-18)
changelog_1188_li=Better string representation for decimal values (for example 0.00000000 instead of 0E-26).
changelog_1189_li=Prepared statements could only be re-used if the same data types were used the second time they were executed.
changelog_1190_li=In error messages about referential constraint violation, the values are now included.
changelog_1191_li=SCRIPT and RUNSCRIPT\:the password can now be set using a prepared statement. Previously, it was required to be a literal in the SQL statement.
changelog_1192_li=MySQL compatibility\:SUBSTR with a negative start index now works like MySQL.
changelog_1193_li=When enabling autocommit, the transaction is now committed (as required by the JDBC API).
changelog_1194_li=The shell script <code>h2.sh</code> did not work with spaces in the path. It also works now with quoted spaces in the argument list. Thanks a lot to Shimizu Fumiyuki for the patch\!
changelog_1195_li=If the transaction log could not be truncated because of an uncommitted transaction, now "Transaction log could not be truncated" is written to the .trace.db file. Before, the database file was growing and it was hard to find out what the root cause was. To avoid the database file from growing, a new feature to automatically rollback the oldest transaction is available now. To enable it, append ;LOG_SIZE_LIMIT\=32 to the database URL (in that case, the oldest session is rolled back if the transaction log is 32 MB).
changelog_1196_li=ALTER TABLE ADD can now add more than one column at a time.
changelog_1197_li=Issue 380\:ALTER TABLE ADD FOREIGN KEY with an explicit index didn't verify the index can be used, which would lead to a NullPointerException later on.
changelog_1198_li=Issue 384\:the wrong kind of exception (NullPointerException) was thrown in a UNION query with an incorrect ORDER BY expression.
changelog_1199_li=Issue 362\:support LIMIT in UPDATE statements.
changelog_1200_li=Browser\:if no default browser is set, Google Chrome is now used if available. If not available, then Konqueror, Netscape, or Opera is used if available (as before).
changelog_1201_li=CSV tool\:new feature to disable writing the column header (option writeColumnHeader).
changelog_1202_li=CSV tool\:new feature to preserve the case sensitivity of column names (option caseSensitiveColumnNames).
changelog_1203_li=PostgreSQL compatibility\:LOG(x) is base 10 in the PostgreSQL mode.
changelog_1022_li=Query Statistics\:new feature which stores the newest 100 SQL queries executed and their performance data. Useful for tracking down badly performing queries.
changelog_1023_h2=Version 1.3.173 (2013-07-28)
changelog_1024_li=Support empty statements that just contains a comment.
changelog_1025_li=Server mode\:if there was an error while reading from a LOB, the session was closed in some cases.
changelog_1026_li=Issue 463\:Driver name and version are now the same in OsgiDataSourceFactory and JdbcDatabaseMetaData.
changelog_1027_li=JaQu\:The data type VARCHAR is now (again) used for Strings (no longer TEXT, except when explicitly set).
changelog_1028_li=For in-memory databases, creating an index on a CLOB or BLOB column is no longer supported. This is to simplify the MVTableEngine.
changelog_1030_li=Issue 468\:trunc(timestamp) could return the wrong value (+12 hours), and trunc(number) throw a NullPointerException.
changelog_1031_li=The expression trunc(number) threw a NullPointerException.
changelog_1032_li=Fixed a deadlock when updating LOB's concurrently. See TestLob.testDeadlock2().
changelog_1033_li=Fixed a deadlock related to very large temporary result sets.
changelog_1034_li=Add "-list" command line option to Shell tool so that result-list-mode can be triggered when reading from a file.
changelog_1035_li=Issue 474\:H2 MySQL Compatibility code fails to ignore "COMMENT" in CREATE TABLE, patch from Aaron Azeckoski.
changelog_1036_li=Issue 476\:Broken link in jaqu.html
changelog_1037_li=Fix potential UTF8 encoding issue in org.h2.store.FileStore, reported by Juerg Spiess.
changelog_1038_li=Improve error message when check constraint is broken, test case from Gili (cowwoc).
changelog_1039_li=Improve error message when we have a unique constraint violation, displays the offending key in the error message.
changelog_1040_li=Issue 478\:Support for "SHOW TRANSACTION ISOLATION LEVEL", patch from Andrew Franklin.
changelog_1041_li=Issue 475\:PgServer\:add support for CancelRequest, patch from Andrew Franklin.
changelog_1042_li=Issue 473\:PgServer missing -key option, patch from Andrew Franklin.
changelog_1043_li=Issue 471\:CREATE VIEW does not check user rights, patch from Andrew Franklin.
changelog_1044_li=Issue 477\:PgServer binary transmission of query params is unimplemented, patch from Andrew Franklin.
changelog_1045_li=Issue 479\:Support for SUBSTRING without a FROM condition, patch from Andrew Franklin.
changelog_1046_li=Issue 472\:PgServer does not work with any recent Postgres JDBC driver, patch from Andrew Franklin.
changelog_1047_li=Add syntax for passing additional parameters into custom TableEngine implementations.
changelog_1048_li=Issue 480\:Bugfix post issue 475, 477, patch from Andrew Franklin.
changelog_1049_li=Issue 481\:Further extensions to PgServer to support better support PG JDBC, patch from Andrew Franklin.
changelog_1050_li=Add support for spatial datatype GEOMETRY.
changelog_1051_li=Add support for in-memory spatial index.
changelog_1052_li=change the PageStore\#changeCount field from an int to a long, to cope with databases with very high transaction rates.
changelog_1053_li=Fix a NullPointerException when attempting to add foreign key reference to a view.
changelog_1054_li=Add sufficient ClientInfo support to our javax.sql.Connection implementation to make WebSphere happy.
changelog_1055_li=Issue 482\:class LobStorageBackend$LobInputStream does not override the method InputStream.available().
changelog_1056_li=Fix corruption resulting from a mix of the "WRITE_DELAY\=0" option and "SELECT DISTINCT" queries that don't fit in memory.
changelog_1057_li=Fix the combination of updating a table which contains an LOB, and reading from the LOB at the same time. Previously it would throw an exception, now it works.
changelog_1058_li=Issue 484\:In the H2 Console tool, all schemas starting with "INFO" where hidden. Now they are hidden only if the database is not H2. Patch from "mgcodeact"/"cumer d"
changelog_1059_li=MySQL compatibility, support the "AUTO_INCREMENT\=3" part of the CREATE TABLE statement.
changelog_1060_li=Issue 486\:MySQL compatibility, support the "DEFAULT CHARSET" part of the CREATE TABLE statement.
changelog_1061_li=Issue 487\:support the MySQL "SET foreign_key_checks \=0" command
changelog_1062_li=Issue 490\:support MySQL "USING BTREE" index declaration
changelog_1063_li=Issue 485\:Database get corrupted when column is renamed for which check constraint was defined inside create table statement.
changelog_1064_li=Issue 499\:support MySQL "UNIQUE KEY (ID) USING BTREE" constraint syntax
changelog_1065_li=Issue 501\:"CREATE TABLE .. WITH"not serialized, patch from nico.devel
changelog_1066_li=Avoid problems with runtime-compiled ALIAS methods when people have set the JAVA_TOOL_OPTIONS environment variable.
changelog_1067_h2=Version 1.3.172 (2013-05-25)
changelog_1068_li=Referential integrity\:when adding a referential integrity constraint failed, and if creating the constraint automatically created an index, this index was not removed.
changelog_1069_li=The auto-analyze feature now only reads 1000 rows per table instead of 10000.
changelog_1070_li=The optimization for IN(...) queries combined with OR could result in a strange exception of the type "column x must be included in the group by list".
changelog_1071_li=Issue 454\:Use Charset for type-safety.
changelog_1072_li=Queries with both LIMIT and OFFSET could throw an IllegalArgumentException.
changelog_1073_li=MVStore\:multiple issues were fixed\:460, 461, 462, 464, 466.
changelog_1074_li=MVStore\:larger stores (multiple GB) are now much faster.
changelog_1075_li=When using local temporary tables and not dropping them manually before closing the session, and then killing the process could result in a database that couldn't be opened (except when using the recover tool).
changelog_1076_li=Support TRUNC(timestamp) for improved Oracle compatibility.
changelog_1077_li=Add support for CREATE TABLE TEST (ID BIGSERIAL) for PostgreSQL compatibility. Patch from Jesse Long.
changelog_1078_li=Add new collation command SET BINARY_COLLATION UNSIGNED, helps with people testing BINARY columns in MySQL mode.
changelog_1079_li=Issue 453\:ABBA race conditions in TABLE LINK connection sharing.
changelog_1080_li=Issue 449\:Postgres Serial data type should not automatically be marked as primary key
changelog_1091_li=Security\:the TCP server did not correctly restrict access rights of clients in some cases. This was specially a problem when using the flag "tcpAllowOthers".
changelog_1092_li=H2 Console\:the session timeout can now be configured using the system property "h2.consoleTimeout".
changelog_1093_li=Issue 431\:Improved compatibility with MySQL\:support for "ENGINE\=InnoDB charset\=UTF8" when creating a table.
changelog_1094_li=Issue 249\:Improved compatibility with MySQL in the MySQL mode\:now the methods DatabaseMetaData methods stores*Case*Identifiers return the same as MySQL when using the MySQL mode.
changelog_1095_li=Issue 434\:H2 Console didn't work in the Chrome browser due to a wrong viewport argument.
changelog_1096_li=There was a possibility that the .lock.db file was not deleted when the database was closed, which could slow down opening the database.
changelog_1097_li=The SQL script generated by the "script" command contained inconsistent newlines on Windows.
changelog_1098_li=When using trace level 4 (SLF4J) in the server mode, a directory "trace.db" and an empty file was created on the client side. This is no longer made.
changelog_1099_li=Optimize IN(...) queries\:there was a bug in version 1.3.170 if the type of the left hand side didn't match the type of the right hand side. Fixed.
changelog_1100_li=Optimize IN(...) queries\:there was a bug in version 1.3.170 for comparison of the type "X IN(NULL, NULL)". Fixed.
changelog_1101_li=Timestamps with timezone that were passed as a string were not always converted correctly. For example "2012-11-06T23\:00\:00.000Z" was converted to "2012-11-06" instead of to "2012-11-07" in the timezone CET. Thanks a lot to Steve Hruda for reporting the problem\!
changelog_1102_li=New table engine "org.h2.mvstore.db.MVTableEngine" that internally uses the MVStore to persist data. To try it out, append ";DEFAULT_TABLE_ENGINE\=org.h2.mvstore.db.MVTableEngine" to the database URL. This is still very experimental, and many features are not supported yet. The data is stored in a file with the suffix ".mv.db".
changelog_1103_li=New connection setting "DEFAULT_TABLE_ENGINE" to use a specific table engine if none is set explicitly. This is to simplify testing the MVStore table engine.
changelog_1104_li=MVStore\:encrypted stores are now supported. Only standardized algorithms are used\:PBKDF2, SHA-256, XTS-AES, AES-128.
changelog_1105_li=MVStore\:improved API thanks to Simo Tripodi.
changelog_1106_li=MVStore\:maps can now be renamed.
changelog_1107_li=MVStore\:store the file header also at the end of each chunk, which results in a further reduced number of write operations.
changelog_1108_li=MVStore\:a map implementation that supports concurrent operations.
changelog_1109_li=MVStore\:unified exception handling; the version is included in the messages.
changelog_1110_li=MVStore\:old data is now retained for 45 seconds by default.
changelog_1111_li=MVStore\:compress is now disabled by default, and can be enabled on request.
changelog_1112_li=Support ALTER TABLE ADD ... AFTER. Patch from Andrew Gaul (argaul at gmail.com). Fixes issue 401.
changelog_1113_li=Improved OSGi support. H2 now registers itself as a DataSourceFactory service. Fixes issue 365.
changelog_1114_li=Add a DISK_SPACE_USED system function. Fixes issue 270.
changelog_1115_li=Fix a compile-time ambiguity when compiling with JDK7, thanks to a patch from Lukas Eder.
changelog_1116_li=Supporting dropping an index for Lucene full-text indexes.
changelog_1117_li=Optimized performance for SELECT ... ORDER BY X LIMIT Y OFFSET Z queries for in-memory databases using partial sort (by Sergi Vladykin).
changelog_1118_li=Experimental off-heap memory storage engine "nioMemFS\:" and "nioMemLZF\:", suggestion from Mark Addleman.
changelog_1119_li=Issue 438\: JdbcDatabaseMetaData.getSchemas() is no longer supported as of 1.3.169.
changelog_1120_li=MySQL compatibility\: support for ALTER TABLE tableName MODIFY [COLUMN] columnName columnDef. Patch from Ville Koskela.
changelog_1121_li=Issue 404\: SHOW COLUMNS FROM tableName does not work with ALLOW_LITERALS\=NUMBERS.
changelog_1122_li=Throw an explicit error to make it clear we don't support the TRIGGER combination of SELECT and FOR EACH ROW.
changelog_1123_li=Issue 439\: Utils.sortTopN does not handle single-element arrays.
changelog_1124_h2=Version 1.3.170 (2012-11-30)
changelog_1125_li=Issue 407\: The TriggerAdapter didn't work with CLOB and BLOB columns.
changelog_1126_li=PostgreSQL compatibility\: support for data types BIGSERIAL and SERIAL as an alias for AUTO_INCREMENT.
changelog_1127_li=Issue 417\: H2 Console\: the web session timeout didn't work, resulting in a memory leak. This was only a problem if the H2 Console was run for a long time and many sessions were opened.
changelog_1128_li=Issue 412\: Running the Server tool with just the option "-browser" will now log a warning.
changelog_1129_li=Issue 411\:CloseWatcher registration was not concurrency-safe.
changelog_1130_li=MySQL compatibility\:support for CONCAT_WS. Thanks a lot to litailang for the patch\!
changelog_1131_li=PostgreSQL compatibility\:support for EXTRACT(WEEK FROM dateColumn). Thanks to Prashant Bhat for the patch\!
changelog_1132_li=Fix for a bug where we would sometimes use the wrong unique constraint to validate foreign key constraints.
changelog_1133_li=Support BOM at the beginning of files for the RUNSCRIPT command
changelog_1134_li=Fix in calling SET @X \=IDENTITY() where it would return NULL incorrectly
changelog_1135_li=Fix ABBA deadlock between adding a constraint and the H2-Log-Writer thread.
changelog_1136_li=Optimize IN(...) queries where the values are constant and of the same type.
changelog_1137_li=Restore tool\:the parameter "quiet" was not used and is now removed.
changelog_1138_li=Fix ConcurrentModificationException when creating tables and executing SHOW TABLES in parallel. Reported by Viktor Voytovych.
changelog_1139_li=Serialization is now pluggable using the system property "h2.javaObjectSerializer". Thanks to Sergi Vladykin for the patch\!
changelog_1140_h2=Version 1.3.169 (2012-09-09)
changelog_1141_li=The default jar file is now compiled for Java 6.
changelog_1142_li=The new jar file will probably not end up in the central Maven repository in the next few weeks because Sonatype has disabled automatic synchronization from SourceForge (which they call 'legacy sync' now). It will probably take some time until this is sorted out. The H2 jar files are deployed to http\://h2database.com/m2-repo/com/h2database/h2/maven-metadata.xml and http\://hsql.sourceforge.net/m2-repo/com/h2database/h2/maven-metadata.xml as usual.
changelog_1143_li=A part of the documentation and the H2 Console has been changed to support the Apple retina display.
changelog_1144_li=The CreateCluster tool could not be used if the source database contained a CLOB or BLOB. The root cause was that the TCP server did not synchronize on the session, which caused a problem when using the exclusive mode.
changelog_1145_li=Statement.getQueryTimeout()\:only the first call to this method will query the database. If the query timeout was changed in another way than calling setQueryTimeout, this method will always return the last value. This was changed because Hibernate calls getQueryTimeout() a lot.
changelog_1146_li=Issue 416\:PreparedStatement.setNString throws AbstractMethodError. All implemented JDBC 4 methods that don't break compatibility with Java 5 are now included in the default jar file.
changelog_1147_li=Issue 414\:for some functions, the parameters were evaluated twice (for example "char(nextval(..))" ran "nextval(..)" twice).
changelog_1148_li=The ResultSetMetaData methods getSchemaName and getTableName could return null instead of "" (an empty string) as specified in the JDBC API.
changelog_1149_li=Added compatibility for "SET NAMES" query in MySQL compatibility mode.
changelog_1150_h2=Version 1.3.168 (2012-07-13)
changelog_1151_li=The message "Transaction log could not be truncated" was sometimes written to the .trace.db file even if there was no problem truncating the transaction log.
changelog_1152_li=New system property "h2.serializeJavaObject" (default\:true) that allows to disable serializing Java objects, so that the objects compareTo and toString methods can be used.
changelog_1153_li=Dylan has translated the H2 Console tool to Korean. Thanks a lot\!
changelog_1154_li=Executing the statement CREATE INDEX IF ALREADY EXISTS if the index already exists no longer fails for a read only database.
changelog_1155_li=MVCC\:concurrently updating a row could result in the row to appear deleted in the second connection, if there are multiple unique indexes (or a primary key and at least one unique index). Thanks a lot to Teruo for the patch\!
changelog_1156_li=Fulltext search\:in-memory Lucene indexes are now supported.
changelog_1157_li=Fulltext search\:UUID primary keys are now supported.
changelog_1158_li=Apache Tomcat 7.x will now longer log a warning when unloading the web application, if using a connection pool.
changelog_1159_li=H2 Console\:support the Midori browser (for Debian / Raspberry Pi)
changelog_1160_li=When opening a remote session, don't open a temporary file if the trace level is set to zero
changelog_1161_li=Use HMAC for authenticating remote LOB id's, removing the need for maintaining a cache, and removing the limit on the number of LOBs per result set.
changelog_1162_li=H2 Console\:HTML and XML documents can now be edited in an updatable result set. There is (limited) support for editing multi-line documents.
changelog_1163_h2=Version 1.3.167 (2012-05-23)
changelog_1164_li=H2 Console\:when editing a row, an empty varchar column was replaced with a single space.
changelog_1165_li=Lukas Eder has updated the jOOQ documentation.
changelog_1166_li=Some nested joins could not be executed, for example\:select * from (select * from (select * from a) a right join b b) c;
changelog_1167_li=MS SQL Server compatibility\:ISNULL is now an alias for IFNULL.
changelog_1168_li=Terrence Huang has completed the translation of the H2 Console tool to Chinese. Thanks a lot\!
changelog_1169_li=Server mode\:the number of CLOB / BLOB values that were cached on the server is now the maximum of\:5 times the SERVER_RESULT_SET_FETCH_SIZE (which is 100 by default), and SysProperties.SERVER_CACHED_OBJECTS.
changelog_1170_li=In the trace file, the query execution time was incorrect in some cases, specially for the statement SET TRACE_LEVEL_FILE 2.
changelog_1171_li=The feature LOG_SIZE_LIMIT that was introduced in version 1.3.165 did not always work correctly (specially with regards to multithreading) and has been removed. The message "Transaction log could not be truncated" is still written to the .trace.db file if required.
changelog_1172_li=Then reading from a resource using the prefix "classpath\:", the ContextClassLoader is now used if the resource can't be read otherwise.
changelog_1173_li=DatabaseEventListener now calls setProgress whenever a statement starts and ends.
changelog_1174_li=DatabaseEventListener now calls setProgress periodically while a statement is running.
changelog_1175_li=The table INFORMATION_SCHEMA.FUNCTION_ALIASES now includes a column TYPE_NAME.
changelog_1176_li=Issue 378\: when using views, the wrong values were bound to a parameter in some cases.
changelog_1177_li=Terrence Huang has translated the error messages to Chinese. Thanks a lot\!
changelog_1178_li=TRUNC was added as an alias for TRUNCATE.
changelog_1179_li=Small optimisation for accessing result values by column name.
changelog_1180_li=Fix for bug in Statement.getMoreResults(int)
changelog_1181_li=The SCRIPT statements now supports filtering by schema and table. Thanks a lot to Jacob Qvortrup for providing the patch\!
changelog_1182_h2=Version 1.3.166 (2012-04-08)
changelog_1183_li=Indexes on column that are larger than half the page size (wide indexes) could sometimes get corrupt, resulting in an ArrayIndexOutOfBoundsException in PageBtree.getRow or "Row not found" in PageBtreeLeaf. Also, such indexes used too much disk space.
changelog_1184_li=Server mode\:when retrieving more than 64 rows each containing a CLOB or BLOB, the error message "The object is already closed" was thrown.
changelog_1185_li=ConvertTraceFile\:the time in the trace file is now parsed as a long.
changelog_1186_li=Invalid connection settings are now detected.
changelog_1187_li=Issue 387\:WHERE condition getting pushed into sub-query with LIMIT.
changelog_1188_h2=Version 1.3.165 (2012-03-18)
changelog_1189_li=Better string representation for decimal values (for example 0.00000000 instead of 0E-26).
changelog_1190_li=Prepared statements could only be re-used if the same data types were used the second time they were executed.
changelog_1191_li=In error messages about referential constraint violation, the values are now included.
changelog_1192_li=SCRIPT and RUNSCRIPT\:the password can now be set using a prepared statement. Previously, it was required to be a literal in the SQL statement.
changelog_1193_li=MySQL compatibility\:SUBSTR with a negative start index now works like MySQL.
changelog_1194_li=When enabling autocommit, the transaction is now committed (as required by the JDBC API).
changelog_1195_li=The shell script <code>h2.sh</code> did not work with spaces in the path. It also works now with quoted spaces in the argument list. Thanks a lot to Shimizu Fumiyuki for the patch\!
changelog_1196_li=If the transaction log could not be truncated because of an uncommitted transaction, now "Transaction log could not be truncated" is written to the .trace.db file. Before, the database file was growing and it was hard to find out what the root cause was. To avoid the database file from growing, a new feature to automatically rollback the oldest transaction is available now. To enable it, append ;LOG_SIZE_LIMIT\=32 to the database URL (in that case, the oldest session is rolled back if the transaction log is 32 MB).
changelog_1197_li=ALTER TABLE ADD can now add more than one column at a time.
changelog_1198_li=Issue 380\:ALTER TABLE ADD FOREIGN KEY with an explicit index didn't verify the index can be used, which would lead to a NullPointerException later on.
changelog_1199_li=Issue 384\:the wrong kind of exception (NullPointerException) was thrown in a UNION query with an incorrect ORDER BY expression.
changelog_1200_li=Issue 362\:support LIMIT in UPDATE statements.
changelog_1201_li=Browser\:if no default browser is set, Google Chrome is now used if available. If not available, then Konqueror, Netscape, or Opera is used if available (as before).
changelog_1202_li=CSV tool\:new feature to disable writing the column header (option writeColumnHeader).
changelog_1203_li=CSV tool\:new feature to preserve the case sensitivity of column names (option caseSensitiveColumnNames).
changelog_1204_li=PostgreSQL compatibility\:LOG(x) is base 10 in the PostgreSQL mode.
cheatSheet_1000_h1=H2 Database Engine Cheat Sheet
cheatSheet_1001_h2=Using H2
cheatSheet_1002_a=H2
...
...
@@ -2400,21 +2401,19 @@ mvstore_1104_li=\ if a method was called that is not supported, for example tryi
mvstore_1105_code=ConcurrentModificationException
mvstore_1106_li=\ if the object is modified concurrently.
mvstore_1107_h3=Table Engine for H2
mvstore_1108_p=\ The plan is to use the MVStore as the default storage engine for the H2 database in the future (supporting SQL, JDBC, transactions, MVCC, and so on). This is work in progress. To try it out, append <code>;MV_STORE\=TRUE</code> to the database URL. In general, functionality and performance should be similar than the current default storage engine (the page store). There are a few features that have not been implemented yet or are not complete\:
mvstore_1109_li=There is still a file <code>.h2.db</code>, and the <code>.lock.db</code> file is still used to lock a database (long term, the plan is to no longer use those files).
mvstore_1110_li=The database file(s) sometimes do not shrink as expected.
mvstore_1111_h2=Similar Projects and Differences to Other Storage Engines
mvstore_1112_p=\ Unlike similar storage engines like LevelDB and Kyoto Cabinet, the MVStore is written in Java and can easily be embedded in a Java and Android application.
mvstore_1113_p=\ The MVStore is somewhat similar to the Berkeley DB Java Edition because it is also written in Java, and is also a log structured storage, but the H2 license is more liberal.
mvstore_1114_p=\ Like SQLite 3, the MVStore keeps all data in one file. Unlike SQLite 3, the MVStore uses is a log structured storage. The plan is to make the MVStore both easier to use as well as faster than SQLite 3. In a recent (very simple) test, the MVStore was about twice as fast as SQLite 3 on Android.
mvstore_1115_p=\ The API of the MVStore is similar to MapDB (previously known as JDBM) from Jan Kotek, and some code is shared between MVStore and MapDB. However, unlike MapDB, the MVStore uses is a log structured storage. The MVStore does not have a record size limit.
mvstore_1116_h2=Current State
mvstore_1117_p=\ The code is still experimental at this stage. The API as well as the behavior may partially change. Features may be added and removed (even thought the main features will stay).
mvstore_1118_h2=Requirements
mvstore_1119_p=\ The MVStore is included in the latest H2 jar file.
mvstore_1120_p=\ There are no special requirements to use it. The MVStore should run on any JVM as well as on Android.
mvstore_1121_p=\ To build just the MVStore (without the database engine), run\:
mvstore_1122_p=\ This will create the file <code>bin/h2mvstore-1.3.173.jar</code> (about 130 KB).
mvstore_1108_p=\ The plan is to use the MVStore as the default storage engine for the H2 database in the future (supporting SQL, JDBC, transactions, MVCC, and so on). This is work in progress. To try it out, append <code>;MV_STORE\=TRUE</code> to the database URL. In general, functionality and performance should be similar than the current default storage engine (the page store). There are a few features that have not been implemented yet or are not complete, for example there is still a file named <code>.h2.db</code>, and the <code>.lock.db</code> file is still used to lock a database (long term, the plan is to no longer use those files).
mvstore_1109_h2=Similar Projects and Differences to Other Storage Engines
mvstore_1110_p=\ Unlike similar storage engines like LevelDB and Kyoto Cabinet, the MVStore is written in Java and can easily be embedded in a Java and Android application.
mvstore_1111_p=\ The MVStore is somewhat similar to the Berkeley DB Java Edition because it is also written in Java, and is also a log structured storage, but the H2 license is more liberal.
mvstore_1112_p=\ Like SQLite 3, the MVStore keeps all data in one file. Unlike SQLite 3, the MVStore uses is a log structured storage. The plan is to make the MVStore both easier to use as well as faster than SQLite 3. In a recent (very simple) test, the MVStore was about twice as fast as SQLite 3 on Android.
mvstore_1113_p=\ The API of the MVStore is similar to MapDB (previously known as JDBM) from Jan Kotek, and some code is shared between MVStore and MapDB. However, unlike MapDB, the MVStore uses is a log structured storage. The MVStore does not have a record size limit.
mvstore_1114_h2=Current State
mvstore_1115_p=\ The code is still experimental at this stage. The API as well as the behavior may partially change. Features may be added and removed (even thought the main features will stay).
mvstore_1116_h2=Requirements
mvstore_1117_p=\ The MVStore is included in the latest H2 jar file.
mvstore_1118_p=\ There are no special requirements to use it. The MVStore should run on any JVM as well as on Android.
mvstore_1119_p=\ To build just the MVStore (without the database engine), run\:
mvstore_1120_p=\ This will create the file <code>bin/h2mvstore-1.3.173.jar</code> (about 130 KB).
