changelog.html 39.7 KB
Newer Older
1 2
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<!--
3
Copyright 2004-2014 H2 Group. Multiple-Licensed under the MPL 2.0, Version 1.0,
4
and under the Eclipse Public License, Version 1.0
5 6 7
Initial Developer: H2 Group
-->
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
Thomas Mueller's avatar
Thomas Mueller committed
8
<head><meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
Thomas Mueller's avatar
Thomas Mueller committed
9
<meta name="viewport" content="width=device-width, initial-scale=1" />
Thomas Mueller's avatar
Thomas Mueller committed
10
<title>
11
Change Log
Thomas Mueller's avatar
Thomas Mueller committed
12 13
</title>
<link rel="stylesheet" type="text/css" href="stylesheet.css" />
14
<!-- [search] { -->
15 16 17
<script type="text/javascript" src="navigation.js"></script>
</head><body onload="frameMe();">
<table class="content"><tr class="content"><td class="content"><div class="contentDiv">
18
<!-- } -->
19 20

<h1>Change Log</h1>
21

Thomas Mueller's avatar
Thomas Mueller committed
22
<h2>Next Version (unreleased)</h2>
23 24 25 26
<ul><li>-
</li></ul>

<h2>Version 1.4.193 Beta (2016-10-31)</h2>
27
<ul>
28 29 30 31
<li>WARNING: THE MERGE BELOW WILL AFFECT ANY 'TIMESTAMP WITH TIMEZONE' INDEXES. You will need to drop and recreate any such indexes.
</li>
<li>PR #364: fix compare TIMESTAMP WITH TIMEZONE
</li>
32 33
<li>Fix bug in picking the right index for INSERT..ON DUPLICATE KEY UPDATE when there are both UNIQUE and PRIMARY KEY constraints.
</li>
34 35
<li>Issue #380: Error Analyzer doesn't show source code
</li>
36 37
<li>Remove the "TIMESTAMP UTC" datatype, an experiment that was never finished.
</li>
38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57
<li>PR #363: Added support to define last IDENTIFIER on a Trigger.
</li>
<li>PR #366: Tests for timestamps
</li>
<li>PR #361: Improve TimestampWithTimeZone javadoc
</li>
<li>PR #360: Change getters in TimestampWithTimeZone to int
</li>
<li>PR #359: Added missing source encoding. Assuming UTF-8.
</li>
<li>PR #353: Add support for converting JAVA_OBJECT to UUID
</li>
<li>PR #358: Add support for getObject(int|String, Class)
</li>
<li>PR #357: Server: use xdg-open to open the WebConsole in the user's preferred browser on Linux
</li>
<li>PR #356: Support for BEFORE and AFTER clauses when using multiple columns in ALTER TABLE ADD
</li>
<li>PR #351: Respect format codes from Bind message when sending results
</li>
Noel Grandin's avatar
Noel Grandin committed
58 59 60 61
<li>ignore summary line when compiling stored procedure
</li>
<li>PR #348: pg: send RowDescription in response to Describe (statement variant), patch by kostya-sh
</li>
62
<li>PR #337: Update russian translation, patch by avp1983
Noel Grandin's avatar
Noel Grandin committed
63 64 65 66 67 68 69
</li>
<li>PR #329: Update to servlet API version 3.1.0 from 3.0.1, patch by Mat Booth
</li>
<li>PR #331: ChangeFileEncryption progress logging ignores -quiet flag, patch by Stefan Bodewig
</li>
<li>PR #325: Make Row an interface
</li>
70
<li>PR #323: Regular expression functions (REGEXP_REPLACE, REGEXP_LIKE) enhancement, patch by Akkuzin
Noel Grandin's avatar
Noel Grandin committed
71
</li>
72 73
<li>Use System.nanoTime for measuring query statistics
</li>
74 75
<li>Issue #324: Deadlock when sending BLOBs over TCP
</li>
76 77
<li>Fix for creating and accessing views in MULTITHREADED mode, test-case courtesy of Daniel Rosenbaum
</li>
Noel Grandin's avatar
Noel Grandin committed
78 79
<li>Issue #266: Spatial index not updating, fixed by merging PR #267
</li>
Noel Grandin's avatar
Noel Grandin committed
80 81 82
<li>PR #302: add support for "with"-subqueries into "join" & "sub-query" statements
</li>
<li>Issue #299: Nested derived tables did not always work as expected.
83
</li>
84 85
<li>Use interfaces to replace the java version templating, idea from Lukas Eder.
</li>
86
<li>Issue #295: JdbcResultSet.getObject(int, Class) returns null instead of throwing.
87
</li>
88 89
<li>Mac OS X: Console tool process did not stop on exit.
</li>
90 91
<li>MVStoreTool: add "repair" feature.
</li>
92 93
<li>Garbage collection of unused chunks should be faster still.
</li>
94 95
<li>MVStore / transaction store: opening a store in read-only mode does no longer loop.
</li>
96 97 98 99
<li>MVStore: disabled the file system cache by default, because it limits concurrency
    when using larger databases and many threads.
    To re-enable, use the file name prefix "cache:".
</li>
100 101
<li>MVStore: add feature to set the cache concurrency.
</li>
102 103
<li>File system nioMemFS: support concurrent reads.
</li>
104 105
<li>File systems: the compressed in-memory file systems now compress better.
</li>
106
<li>LIRS cache: improved hit rate because now added entries get hot if they
107 108
    were in the non-resident part of the cache before.
</li>
109 110 111 112
</ul>

<h2>Version 1.4.192 Beta (2016-05-26)</h2>
<ul>
113 114
<li>Garbage collection of unused chunks should now be faster.
</li>
115 116
<li>Prevent people using unsupported combination of auto-increment columns and clustering mode.
</li>
117 118
<li>Support for DB2 time format, patch by Niklas Mehner
</li>
119 120
<li>Added support for Connection.setClientInfo() in compatibility modes for DB2, Postgresql, Oracle and MySQL.
</li>
121 122
<li>Issue #249: Clarify license declaration in Maven POM xml
</li>
Thomas Mueller Graf's avatar
Thomas Mueller Graf committed
123
<li>Fix NullPointerException in querying spatial data through a sub-select.
124
</li>
125 126 127
<li>Fix bug where a lock on the SYS table was not released when closing a session that contained a temp
table with an LOB column.
</li>
128 129
<li>Issue #255: ConcurrentModificationException with multiple threads in embedded mode and temporary LOBs
</li>
130 131
<li>Issue #235: Anonymous SSL connections fail in many situations
</li>
132
<li>Fix race condition in FILE_LOCK=SOCKET, which could result in the watchdog thread not running
133
</li>
134 135
<li>Experimental support for datatype TIMESTAMP WITH TIMEZONE
</li>
136 137
<li>Add support for ALTER TABLE ... RENAME CONSTRAINT .. TO ...
</li>
138 139
<li>Add support for PostgreSQL ALTER TABLE ... RENAME COLUMN .. TO ...
</li>
140 141 142 143 144 145
<li>Add support for ALTER SCHEMA [ IF EXISTS ]
</li>
<li>Add support for ALTER TABLE [ IF EXISTS ]
</li>
<li>Add support for ALTER VIEW [ IF EXISTS ]
</li>
146
<li>Add support for ALTER INDEX [ IF EXISTS ]
147 148 149
</li>
<li>Add support for ALTER SEQUENCE [ IF EXISTS ]
</li>
150 151
<li>Improve performance of cleaning up temp tables - patch from Eric Faulhaber.
</li>
152 153
<li>Fix bug where table locks were not dropped when the connection closed
</li>
154 155
<li>Fix extra CPU usage caused by query planner enhancement in 1.4.191
</li>
156 157
<li>improve performance of queries that use LIKE 'foo%' - 10x in the case of one of my queries
</li>
158 159
<li>The function IFNULL did not always return the result in the right data type.
</li>
160 161
<li>Issue #231: Possible infinite loop when initializing the ObjectDataType class
    when concurrently writing into MVStore.
162
</li>
Thomas Mueller Graf's avatar
Thomas Mueller Graf committed
163
</ul>
164 165 166

<h2>Version 1.4.191 Beta (2016-01-21)</h2>
<ul>
167 168
<li>TO_DATE and TO_TIMESTAMP functions. Thanks a lot to Sam Blume for the patch!
</li>
169 170 171
<li>Issue #229: DATEDIFF does not work for 'WEEK'.
</li>
<li>Issue #156: Add support for getGeneratedKeys() when executing commands via PreparedStatement#executeBatch.
172
</li>
173
<li>Issue #195: The new Maven uses a .cmd file instead of a .bat file.
174
</li>
175
<li>Issue #212: EXPLAIN PLAN for UPDATE statement did not display LIMIT expression.
176
</li>
177
<li>Support OFFSET without LIMIT in SELECT.
178
</li>
179
<li>Improve error message for METHOD_NOT_FOUND_1/90087.
180
</li>
181 182
<li>CLOB and BLOB objects of removed rows were sometimes kept in the database file.
</li>
183 184
<li>Server mode: executing "shutdown" left a thread on the server.
</li>
185 186
<li>The condition "in(select...)" did not work correctly in some cases if the subquery had an "order by".
</li>
187 188
<li>Issue #184: The Platform-independent zip had Windows line endings in Linux scripts.
</li>
189
<li>Issue #186: The "script" command did not include sequences of temporary tables.
190
</li>
Thomas Mueller Graf's avatar
Thomas Mueller Graf committed
191
<li>Issue #115: to_char fails with pattern FM0D099.
192
</li>
193 194 195 196 197 198
</ul>

<h2>Version 1.4.190 Beta (2015-10-11)</h2>
<ul>
<li>Pull request #183: optimizer hints (so far without special SQL syntax).
</li>
199
<li>Issue #180: In MVCC mode, executing UPDATE and SELECT ... FOR UPDATE
200 201
    simultaneously silently can drop rows.
</li>
202 203 204
<li>PageStore storage: the cooperative file locking mechanism
    did not always work as expected (with very slow computers).
</li>
205 206 207
<li>Temporary CLOB and BLOB objects are now removed while the database is open
    (and not just when closing the database).
</li>
208 209
<li>MVStore CLOB and BLOB larger than about 25 MB: An exception could be thrown
    when using the MVStore storage.
210
</li>
211 212
<li>Add FILE_WRITE function. Patch provided by Nicolas Fortin
    (Lab-STICC - CNRS UMR 6285 and Ecole Centrale de Nantes)
nicolas-f's avatar
nicolas-f committed
213
</li>
214 215 216 217
</ul>

<h2>Version 1.4.189 Beta (2015-09-13)</h2>
<ul>
218 219
<li>Add support for dropping multiple columns in ALTER TABLE DROP COLUMN...
</li>
220
<li>Fix bug in XA management when doing rollback after prepare. Patch by Stephane Lacoin.
221
</li>
Thomas Mueller Graf's avatar
Thomas Mueller Graf committed
222 223 224 225 226
<li>MVStore CLOB and BLOB: An exception with the message "Block not found" could be thrown
    when using the MVStore storage, when copying LOB objects
    (for example due to "alter table" on a table with a LOB object),
    and then re-opening the database.
</li>
227
<li>Fix for issue #171: Broken QueryStatisticsData duration data when trace level smaller than TraceSystem.INFO
228
</li>
Noel Grandin's avatar
Noel Grandin committed
229 230
<li>Pull request #170: Added SET QUERY_STATISTICS_MAX_ENTRIES
</li>
231 232
<li>Pull request #165: Fix compatibility postgresql function string_agg
</li>
233 234
<li>Pull request #163: improved performance when not using the default timezone.
</li>
235 236
<li>Local temporary tables with many rows did not work correctly due to automatic analyze.
</li>
237 238 239
<li>Server mode: concurrently using the same connection could throw an exception
    "Connection is broken: unexpected status".
</li>
240 241
<li>Performance improvement for metadata queries that join against the COLUMNS metadata table.
</li>
242 243 244 245 246 247 248
<li>An ArrayIndexOutOfBoundsException was thrown in some cases
    when opening an old version 1.3 database, or an 1.4 database with
    both "mv_store=false" and the system property "h2.storeLocalTime" set to false.
    It mainly showed up with an index on a time, date, or timestamp column.
    The system property "h2.storeLocalTime" is no longer supported
    (MVStore databases always store local time, and PageStore now databases never do).
</li>
Thomas Mueller's avatar
Thomas Mueller committed
249 250 251
</ul>

<h2>Version 1.4.188 Beta (2015-08-01)</h2>
252
<ul>
253 254 255 256
<li>Server mode: CLOB processing for texts larger than about 1 MB sometimes did not work.
</li>
<li>Server mode: BLOB processing for binaries larger than 2 GB did not work.
</li>
257 258 259
<li>Multi-threaded processing: concurrent deleting the same row could throw the exception
    "Row not found when trying to delete".
</li>
260 261 262
<li>MVStore transactions: a thread could see a change of a different thread
    within a different map. Pull request #153.
</li>
263 264
<li>H2 Console: improved IBM DB2 compatibility.
</li>
265 266 267
<li>A thread deadlock detector (disabled by default) can help
    detect and analyze Java level deadlocks.
    To enable, set the system property "h2.threadDeadlockDetector" to true.
268 269
</li>
<li>Performance improvement for metadata queries that join against the COLUMNS metadata table.
270
</li>
271 272
<li>MVStore: power failure could corrupt the store, if writes were re-ordered.
</li>
273 274 275
<li>For compatibility with other databases, support for (double and float)
    -0.0 has been removed. 0.0 is used instead.
</li>
276 277
<li>Fix for #134, Column name with a # character. Patch by bradmesserle.
</li>
278 279 280 281
<li>In version 1.4.186, "order by" was broken in some cases
    due to the change "Make the planner use indexes for sorting when doing a GROUP BY".
    The change was reverted.
</li>
282
<li>Pull request #146: Improved CompareMode.
283
</li>
284 285 286
<li>Fix for #144, JdbcResultSet.setFetchDirection() throws "Feature not supported".
</li>
<li>Fix for issue #143, deadlock between two sessions hitting the same sequence on a column.
287
</li>
288 289
<li>Pull request #137: SourceCompiler should not throw a syntax error on javac warning.
</li>
290 291 292 293 294
<li>MVStore: out of memory while storing could corrupt the store
    (theoretically, a rollback would be possible, but this case is not yet implemented).
</li>
<li>The compressed in-memory file systems (memLZF:) could not be used in the MVStore.
</li>
295 296 297
<li>The in-memory file systems (memFS: and memLZF:) did not support files larger than 2 GB
    due to an integer overflow.
</li>
Noel Grandin's avatar
Noel Grandin committed
298 299
<li>Pull request #138: Added the simple Oracle function: ORA_HASH (+ tests) #138
</li>
300
<li>Timestamps in the trace log follow the format (yyyy-MM-dd HH:mm:ss) instead
301 302
of the old format (MM-dd HH:mm:ss). Patch by Richard Bull.
</li>
303 304
<li>Pull request #125: Improved Oracle compatibility with "truncate" with timestamps and dates.
</li>
305
<li>Pull request #127: Linked tables now support geometry columns.
306
</li>
307 308
<li>ABS(CAST(0.0 AS DOUBLE)) returned -0.0 instead of 0.0.
</li>
309 310 311
<li>BNF auto-completion failed with unquoted identifiers.
</li>
<li>Oracle compatibility: empty strings were not converted to NULL when using prepared statements.
312
</li><li>PostgreSQL compatibility: new syntax "create index ... using ...".
313
</li><li>There was a bug in DataType.convertToValue when reading a ResultSet from a ResultSet.
314
</li><li>Pull request #116: Improved concurrency in the trace system.
315
</li><li>Issue 609: the spatial index did not support NULL.
316
</li><li>Granting a schema is now supported.
317
</li><li>Linked tables did not work when a function-based index is present (Oracle).
318
</li><li>Creating a user with a null password, salt, or hash threw a NullPointerException.
319
</li><li>Foreign key: don't add a single column index if column
320 321
    is leading key of existing index.
</li><li>Pull request #4: Creating and removing temporary tables was getting
322 323 324
    slower and slower over time, because an internal object id was allocated but
    never de-allocated.
</li><li>Issue 609: the spatial index did not support NULL with update and delete operations.
325
</li><li>Pull request #2: Add external metadata type support (table type "external")
326
</li><li>MS SQL Server: the CONVERT method did not work in views
327
    and derived tables.
328
</li><li>Java 8 compatibility for "regexp_replace".
329 330
</li><li>When in cluster mode, and one of the nodes goes down,
    we need to log the problem with priority "error", not "debug"
Thomas Mueller's avatar
Thomas Mueller committed
331 332 333
</li></ul>

<h2>Version 1.4.187 Beta (2015-04-10)</h2>
Thomas Mueller's avatar
Thomas Mueller committed
334 335 336 337 338 339 340 341 342 343
<ul><li>MVStore: concurrent changes to the same row could result in
    the exception "The transaction log might be corrupt for key ...".
    This could only be reproduced with 3 or more threads.
</li><li>Results with CLOB or BLOB data are no longer reused.
</li><li>References to BLOB and CLOB objects now have a timeout.
    The configuration setting is LOB_TIMEOUT (default 5 minutes).
    This should avoid growing the database file if there are many queries that return BLOB or CLOB objects,
    and the database is not closed for a longer time.
</li><li>MVStore: when committing a session that removed LOB values,
    changes were flushed unnecessarily.
Thomas Mueller's avatar
Thomas Mueller committed
344 345
</li><li>Issue 610: possible integer overflow in WriteBuffer.grow().
</li><li>Issue 609: the spatial index did not support NULL (ClassCastException).
Thomas Mueller's avatar
Thomas Mueller committed
346
</li><li>MVStore: in some cases, CLOB/BLOB data blocks were removed
Thomas Mueller's avatar
Thomas Mueller committed
347 348 349
    incorrectly when opening a database.
</li><li>MVStore: updates that affected many rows were were slow
    in some cases if there was a secondary index.
Thomas Mueller's avatar
Thomas Mueller committed
350
</li><li>Using "runscript" with autocommit disabled could result
Thomas Mueller's avatar
Thomas Mueller committed
351 352
    in a lock timeout on the internal table "SYS".
</li><li>Issue 603: there was a memory leak when using H2 in a web application.
Thomas Mueller's avatar
Thomas Mueller committed
353
    Apache Tomcat logged an error message: "The web application ...
Thomas Mueller's avatar
Thomas Mueller committed
354 355 356
    created a ThreadLocal with key of type [org.h2.util.DateTimeUtils$1]".
</li><li>When using the MVStore,
    running a SQL script generate by the Recover tool from a PageStore file
Thomas Mueller's avatar
Thomas Mueller committed
357
    failed with a strange error message (NullPointerException),
Thomas Mueller's avatar
Thomas Mueller committed
358
    now a clear error message is shown.
Thomas Mueller's avatar
Thomas Mueller committed
359
</li><li>Issue 605: with version 1.4.186, opening a database could result in
Thomas Mueller's avatar
Thomas Mueller committed
360 361
    an endless loop in LobStorageMap.init.
</li><li>Queries that use the same table alias multiple times now work.
Thomas Mueller's avatar
Thomas Mueller committed
362
    Before, the select expression list was expanded incorrectly.
Thomas Mueller's avatar
Thomas Mueller committed
363 364
    Example: "select * from a as x, b as x".
</li><li>The MySQL compatibility feature "insert ... on duplicate key update"
Thomas Mueller's avatar
Thomas Mueller committed
365 366 367 368 369 370 371 372 373
    did not work with a non-default schema.
</li><li>Issue 599: the condition "in(x, y)" could not be used in the select list
    when using "group by".
</li><li>The LIRS cache could grow larger than the allocated memory.
</li><li>A new file system implementation that re-opens the file if it was closed due
    to the application calling Thread.interrupt(). File name prefix "retry:".
    Please note it is strongly recommended to avoid calling Thread.interrupt;
    this is a problem for various libraries, including Apache Lucene.
</li><li>MVStore: use RandomAccessFile file system if the file name starts with "file:".
374
</li><li>Allow DATEADD to take a long value for count when manipulating milliseconds.
375
</li><li>When using MV_STORE=TRUE and the SET CACHE_SIZE setting, the cache size was incorrectly set,
Thomas Mueller's avatar
Thomas Mueller committed
376
    so that it was effectively 1024 times smaller than it should be.
377 378
</li><li>Concurrent CREATE TABLE... IF NOT EXISTS in the presence of MULTI_THREAD=TRUE could
    throw an exception.
379
</li><li>Fix bug in MVStore when creating lots of temporary tables, where we could run out of
380
    transaction IDs.
381
</li><li>Add support for PostgreSQL STRING_AGG function. Patch by Fred Aquiles.
Thomas Mueller's avatar
Thomas Mueller committed
382 383
</li><li>Fix bug in "jdbc:h2:nioMemFS" isRoot() function.
    Also, the page size was increased to 64 KB.
Thomas Mueller's avatar
Thomas Mueller committed
384 385 386
</li></ul>

<h2>Version 1.4.186 Beta (2015-03-02)</h2>
Thomas Mueller's avatar
Thomas Mueller committed
387 388 389 390 391 392
<ul><li>The Servlet API 3.0.1 is now used, instead of 2.4.
</li><li>MVStore: old chunks no longer removed in append-only mode.
</li><li>MVStore: the cache for page references could grow far too big, resulting in out of memory in some cases.
</li><li>MVStore: orphaned lob objects were not correctly removed in some cases,
    making the database grow unnecessarily.
</li><li>MVStore: the maximum cache size was artificially limited to 2 GB
393 394
    (due to an integer overflow).
</li><li>MVStore / TransactionStore: concurrent updates could result in a
395 396
    "Too many open transactions" exception.
</li><li>StringUtils.toUpperEnglish now has a small cache.
397 398
    This should speed up reading from a ResultSet when using the column name.
</li><li>MVStore: up to 65535 open transactions are now supported.
399 400 401
    Previously, the limit was at most 65535 transactions between the oldest open and the
    newest open transaction (which was quite a strange limit).
</li><li>The default limit for in-place LOB objects was changed from 128 to 256 bytes.
Thomas Mueller's avatar
Thomas Mueller committed
402 403
    This is because each read creates a reference to a LOB, and maintaining the references
    is a big overhead. With the higher limit, less references are needed.
Thomas Mueller's avatar
Thomas Mueller committed
404
</li><li>Tables without columns didn't work.
Thomas Mueller's avatar
Thomas Mueller committed
405
    (The use case for such tables is testing.)
Thomas Mueller's avatar
Thomas Mueller committed
406
</li><li>The LIRS cache now resizes the table automatically in all cases
Thomas Mueller's avatar
Thomas Mueller committed
407 408 409
    and no longer needs the averageMemory configuration.
</li><li>Creating a linked table from an MVStore database to a non-MVStore database
    created a second (non-MVStore) database file.
Thomas Mueller's avatar
Thomas Mueller committed
410
</li><li>In version 1.4.184, a bug was introduced that broke queries
411 412
    that have both joins and wildcards, for example:
    select * from dual join(select x from dual) on 1=1
Thomas Mueller's avatar
Thomas Mueller committed
413
</li><li>Issue 598: parser fails on timestamp "24:00:00.1234" - prevent the creation of out-of-range time values.
Thomas Mueller's avatar
Thomas Mueller committed
414
</li><li>Allow declaring triggers as source code (like functions). Patch by Sylvain Cuaz.
Thomas Mueller's avatar
Thomas Mueller committed
415
</li><li>Make the planner use indexes for sorting when doing a GROUP BY where
416
    all of the GROUP BY columns are not mentioned in the select. Patch by Frederico (zepfred).
417
</li><li>PostgreSQL compatibility: generate_series (as an alias for system_range). Patch by litailang.
418
</li><li>Fix missing "column" type in right-hand parameter in ConditionIn. Patch by Arnaud Thimel.
Thomas Mueller's avatar
Thomas Mueller committed
419 420 421
</li></ul>

<h2>Version 1.4.185 Beta (2015-01-16)</h2>
Thomas Mueller's avatar
Thomas Mueller committed
422 423
<ul><li>In version 1.4.184, "group by" ignored the table name,
    and could pick a select column by mistake.
424 425
    Example: select 0 as x from system_range(1, 2) d group by d.x;
</li><li>New connection setting "REUSE_SPACE" (default: true). If disabled,
426 427 428 429
    all changes are appended to the database file, and existing content is never overwritten.
    This allows to rollback to a previous state of the database by truncating
    the database file.
</li><li>Issue 587: MVStore: concurrent compaction and store operations could result in an IllegalStateException.
430
</li><li>Issue 594: Profiler.copyInThread does not work properly.
431 432
</li><li>Script tool: Now, SCRIPT ... TO is always used (for higher speed and lower disk space usage).
</li><li>Script tool: Fix parsing of BLOCKSIZE parameter, original patch by Ken Jorissen.
433 434
</li><li>Fix bug in PageStore#commit method - when the ignoreBigLog flag was set,
    the logic that cleared the flag could never be reached, resulting in performance degradation.
435
    Reported by Alexander Nesterov.
436
</li><li>Issue 552: Implement BIT_AND and BIT_OR aggregate functions.
Thomas Mueller's avatar
Thomas Mueller committed
437 438
</li></ul>

Thomas Mueller's avatar
Thomas Mueller committed
439
<h2>Version 1.4.184 Beta (2014-12-19)</h2>
440 441 442 443
<ul><li>In version 1.3.183, indexes were not used if the table contains
    columns with a default value generated by a sequence.
    This includes tables with identity and auto-increment columns.
    This bug was introduced by supporting "rownum" in views and derived tables.
Thomas Mueller's avatar
Thomas Mueller committed
444 445
</li><li>MVStore: imported BLOB and CLOB data sometimes disappeared.
    This was caused by a bug in the ObjectDataType comparison.
Thomas Mueller's avatar
Thomas Mueller committed
446 447
</li><li>Reading from a StreamStore now throws an
    IOException if the underlying data doesn't exist.
448
</li><li>MVStore: if there is an exception while saving, the store is now in all cases immediately closed.
Thomas Mueller's avatar
Thomas Mueller committed
449 450
</li><li>MVStore: the dump tool could go into an endless loop for some files.
</li><li>MVStore: recovery for a database with many CLOB or BLOB entries is now much faster.
Thomas Mueller's avatar
Thomas Mueller committed
451
</li><li>Group by with a quoted select column name alias didn't work. Example:
Thomas Mueller's avatar
Thomas Mueller committed
452 453
    select 1 "a" from dual group by "a"
</li><li>Auto-server mode: the host name is now stored in the .lock.db file.
Thomas Mueller's avatar
Thomas Mueller committed
454 455 456
</li></ul>

<h2>Version 1.4.183 Beta (2014-12-13)</h2>
Thomas Mueller's avatar
Thomas Mueller committed
457 458 459 460
<ul><li>MVStore: the default auto-commit buffer size is now about twice as big.
    This should reduce the database file size after inserting a lot of data.
</li><li>The built-in functions "power" and "radians" now always return a double.
</li><li>Using "row_number" or "rownum" in views or derived tables had unexpected results
461
    if the outer query contained constraints for the given view. Example:
Thomas Mueller's avatar
Thomas Mueller committed
462
    select b.nr, b.id from (select row_number() over() as nr, a.id as id
463 464
    from (select id from test order by name) as a) as b where b.id = 1
</li><li>MVStore: the Recover tool can now deal with more types of corruption in the file.
465 466
</li><li>MVStore: the TransactionStore now first needs to be initialized before it can be used.
</li><li>Views and derived tables with equality and range conditions on the same columns
Thomas Mueller's avatar
Thomas Mueller committed
467 468 469
    did not work properly. example: select x from (select x from (select 1 as x)
    where x &gt; 0 and x &lt; 2) where x = 1
</li><li>The database URL setting PAGE_SIZE setting is now also used for the MVStore.
Thomas Mueller's avatar
Thomas Mueller committed
470 471 472 473
</li><li>MVStore: the default page split size for persistent stores is now 4096
    (it was 16 KB so far). This should reduce the database file size for most situations
    (in some cases, less than half the size of the previous version).
</li><li>With query literals disabled, auto-analyze of a table with CLOB or BLOB did not work.
Thomas Mueller's avatar
Thomas Mueller committed
474
</li><li>MVStore: use a mark and sweep GC algorithm instead of reference counting,
475 476
    to ensure used chunks are never overwrite, even if the reference counting
    algorithm does not work properly.
Thomas Mueller's avatar
Thomas Mueller committed
477
</li><li>In the multi-threaded mode, updating the column selectivity ("analyze")
Thomas Mueller's avatar
Thomas Mueller committed
478
    in the background sometimes did not work.
Thomas Mueller's avatar
Thomas Mueller committed
479
</li><li>In the multi-threaded mode, database metadata operations
Thomas Mueller's avatar
Thomas Mueller committed
480 481 482 483 484 485 486 487 488
    did sometimes not work if the schema was changed at the same time
    (for example, if tables were dropped).
</li><li>Some CLOB and BLOB values could no longer be read when
    the original row was removed (even when using the MVCC mode).
</li><li>The MVStoreTool could throw an IllegalArgumentException.
</li><li>Improved performance for some
    date / time / timestamp conversion operations.
    Thanks to Sergey Evdokimov for reporting the problem.
</li><li>H2 Console: the built-in web server did not work properly
489 490 491 492 493 494 495 496
    if an unknown file was requested.
</li><li>MVStore: the jar file is renamed to "h2-mvstore-*.jar" and is
    deployed to Maven separately.
</li><li>MVStore: support for concurrent reads and writes is now enabled by default.
</li><li>Server mode: the transfer buffer size has been changed from 16 KB to 64 KB,
    after it was found that this improves performance on Linux quite a lot.
</li><li>H2 Console and server mode: SSL is now disabled and TLS is used
    to protect against the Poodle SSLv3 vulnerability.
497 498
    The system property to disable secure anonymous connections is now
    "h2.enableAnonymousTLS".
499
    The default certificate is still self-signed, so you need to manually install
500 501 502
    another one if you want to avoid man in the middle attacks.
</li><li>MVStore: the R-tree did not correctly measure the memory usage.
</li><li>MVStore: compacting a store with an R-tree did not always work.
503
</li><li>Issue 581: When running in LOCK_MODE=0,
504 505
        JdbcDatabaseMetaData#supportsTransactionIsolationLevel(TRANSACTION_READ_UNCOMMITTED)
    should return false
506
</li><li>Fix bug which could generate deadlocks when multiple connections accessed the same table.
507 508
</li><li>Some places in the code were not respecting the value set in the "SET MAX_MEMORY_ROWS x" command
</li><li>Fix bug which could generate a NegativeArraySizeException when performing large (>40M) row union operations
509
</li><li>Fix "USE schema" command for MySQL compatibility, patch by mfulton
510
</li><li>Parse and ignore the ROW_FORMAT=DYNAMIC MySQL syntax, patch by mfulton
Thomas Mueller's avatar
Thomas Mueller committed
511 512 513
</li></ul>

<h2>Version 1.4.182 Beta (2014-10-17)</h2>
514 515 516
<ul><li>MVStore: improved error messages and logging;
    improved behavior if there is an error when serializing objects.
</li><li>OSGi: the MVStore packages are now exported.
Thomas Mueller's avatar
Thomas Mueller committed
517 518 519 520 521 522 523 524 525 526 527 528
</li><li>With the MVStore option, when using multiple threads
    that concurrently create indexes or tables,
    it was relatively easy to get a lock timeout on the "SYS" table.
</li><li>When using the multi-threaded option, the exception
    "Unexpected code path" could be thrown, specially if the option
    "analyze_auto" was set to a low value.
</li><li>In the server mode, when reading from a CLOB or BLOB, if the connection
    was closed, a NullPointerException could be thrown instead of an exception saying
    the connection is closed.
</li><li>DatabaseMetaData.getProcedures and getProcedureColumns
    could throw an exception if a user defined class is not available.
</li><li>Issue 584: the error message for a wrong sequence definition was wrong.
529
</li><li>CSV tool: the rowSeparator option is no longer supported,
530 531
    as the same can be achieved with the lineSeparator.
</li><li>Descending indexes on MVStore tables did not work properly.
532
</li><li>Issue 579: Conditions on the "_rowid_" pseudo-column didn't use an index
533 534 535
    when using the MVStore.
</li><li>Fixed documentation that "offset" and "fetch" are also keywords since version 1.4.x.
</li><li>The Long.MIN_VALUE could not be parsed for auto-increment (identity) columns.
536
</li><li>Issue 573: Add implementation for Methods "isWrapperFor()" and "unwrap()" in
537
    other JDBC classes.
538
</li><li>Issue 572: MySQL compatibility for "order by" in update statements.
539 540 541 542
</li><li>The change in  JDBC escape processing in version 1.4.181 affects both the parser
    (which is running on the server) and the JDBC API (which is running on the client).
    If you (or a tool you use) use the syntax "{t 'time}", or "{ts 'timestamp'}", or "{d 'data'}",
    then both the client and the server need to be upgraded to version 1.4.181 or later.
Thomas Mueller's avatar
Thomas Mueller committed
543 544 545
</li></ul>

<h2>Version 1.4.181 Beta (2014-08-06)</h2>
546 547 548
<ul><li>Improved MySQL compatibility by supporting "use schema".
    Thanks a lot to Karl Pietrzak for the patch!
</li><li>Writing to the trace file is now faster, specially with the debug level.
549
</li><li>The database option "defrag_always=true" did not work with the MVStore.
550
</li><li>The JDBC escape syntax {ts 'value'} did not interpret the value as a timestamp.
551 552
    The same for {d 'value'} (for date) and {t 'value'} (for time).
    Thanks to Lukas Eder for reporting the issue.
553 554 555 556 557
    The following problem was detected after version 1.4.181 was released:
    The change in  JDBC escape processing affects both the parser (which is running on the server)
    and the JDBC API (which is running on the client).
    If you (or a tool you use) use the syntax {t 'time'}, or {ts 'timestamp'}, or {d 'date'},
    then both the client and the server need to be upgraded to version 1.4.181 or later.
558 559
</li><li>File system abstraction: support replacing existing files using move
    (currently not for Windows).
560
</li><li>The statement "shutdown defrag" now compresses the database (with the MVStore).
561 562 563 564 565
    This command can greatly reduce the file size, and is relatively fast,
    but is not incremental.
</li><li>The MVStore now automatically compacts the store in the background if there is no read or write activity,
    which should (after some time; sometimes about one minute) reduce the file size.
    This is still work in progress, feedback is welcome!
566
</li><li>Change default value of PAGE_SIZE from 2048 to 4096 to more closely match most file systems block size
567
    (PageStore only; the MVStore already used 4096).
568
</li><li>Auto-scale MAX_MEMORY_ROWS and CACHE_SIZE settings by the amount of available RAM. Gives a better
569
    out of box experience for people with more powerful machines.
570
</li><li>Handle tabs like 4 spaces in web console, patch by Martin Grajcar.
571
</li><li>Issue 573: Add implementation for Methods "isWrapperFor()" and "unwrap()" in JdbcConnection.java,
572
    patch by BigMichi1.
Thomas Mueller's avatar
Thomas Mueller committed
573 574 575
</li></ul>

<h2>Version 1.4.180 Beta (2014-07-13)</h2>
576 577
<ul><li>MVStore: the store is now auto-compacted automatically up to some point,
    to avoid very large file sizes. This area is still work in progress.
Thomas Mueller's avatar
Thomas Mueller committed
578
</li><li>Sequences of temporary tables (auto-increment or identity columns)
Thomas Mueller's avatar
Thomas Mueller committed
579 580 581 582 583 584
    were persisted unnecessarily in the database file, and were not removed
    when re-opening the database.
</li><li>MVStore: an IndexOutOfBoundsException could sometimes
    occur MVMap.openVersion when concurrently accessing the store.
</li><li>The LIRS cache now re-sizes the internal hash map if needed.
</li><li>Optionally persist session history in the H2 console. (patch from Martin Grajcar)
Thomas Mueller's avatar
Thomas Mueller committed
585
</li><li>Add client-info property to get the number of servers currently in the cluster
Thomas Mueller's avatar
Thomas Mueller committed
586
    and which servers that are available. (patch from Nikolaj Fogh)
Thomas Mueller's avatar
Thomas Mueller committed
587
</li><li>Fix bug in changing encrypted DB password that kept the file handle
Thomas Mueller's avatar
Thomas Mueller committed
588 589 590
    open when the wrong password was supplied. (test case from Jens Hohmuth).
</li><li>Issue 567: H2 hangs for a long time then (sometimes) recovers.
    Introduce a queue when doing table locking to prevent session starvation.
591
</li></ul>
Thomas Mueller's avatar
Thomas Mueller committed
592 593

<h2>Version 1.4.179 Beta (2014-06-23)</h2>
594 595
<ul><li>The license was changed to MPL 2.0 (from 1.0) and EPL 1.0.
</li><li>Issue 565: MVStore: concurrently adding LOB objects
596 597 598
    (with MULTI_THREADED option) resulted in a NullPointerException.
</li><li>MVStore: reduced dependencies to other H2 classes.
</li><li>There was a way to prevent a database from being re-opened,
Thomas Mueller's avatar
Thomas Mueller committed
599 600
    by creating a column constraint that references a table with a higher id,
    for example with "check" constraints that contains queries.
Thomas Mueller's avatar
Thomas Mueller committed
601 602 603 604
    This is now detected, and creating the table is prohibited.
    In future versions of H2, most likely creating references to other
    tables will no longer be supported because of such problems.
</li><li>MVStore: descending indexes with "nulls first" did not work as expected
605 606
    (null was ordered last).
</li><li>Large result sets now always create temporary tables instead of temporary files.
607
</li><li>When using the PageStore, opening a database failed in some cases with a NullPointerException
608 609 610 611 612 613 614 615 616 617
    if temporary tables were used (explicitly, or implicitly when using large result sets).
</li><li>If a database file in the PageStore file format exists, this file and this mode
    is now used, even if the database URL does not contain "MV_STORE=FALSE".
    If a MVStore file exists, it is used.
</li><li>Databases created with version 1.3.175 and earlier
    that contained foreign keys in combination with multi-column indexes
    could not be opened in some cases.
    This was due to a bugfix in version 1.3.176:
    Referential integrity constraints sometimes used the wrong index.
</li><li>MVStore: the ObjectDataType comparison method was incorrect if one
618
    key was Serializable and the other was of a common class.
Thomas Mueller's avatar
Thomas Mueller committed
619
</li><li>Recursive queries with many result rows (more than the setting "max_memory_rows")
620 621 622 623
    did not work correctly.
</li><li>The license has changed to MPL 2.0 + EPL 1.0.
</li><li>MVStore: temporary tables from result sets could survive re-opening a database,
    which could result in a ClassCastException.
Thomas Mueller's avatar
Thomas Mueller committed
624
</li><li>Issue 566: MVStore: unique indexes that were created later on did not work correctly
625
    if there were over 5000 rows in the table.
Thomas Mueller's avatar
Thomas Mueller committed
626
    Existing databases need to be re-created (at least the broken index need to be re-built).
Thomas Mueller's avatar
Thomas Mueller committed
627
</li><li>MVStore: creating secondary indexes on large tables
628 629
    results in missing rows in the index.
</li><li>Metadata: the password of linked tables is now only visible for admin users.
630
</li><li>For Windows, database URLs of the form "jdbc:h2:/test" where considered
631
    relative and did not work unless the system property "h2.implicitRelativePath" was used.
632
</li><li>Windows: using a base directory of "C:/" and similar did not work as expected.
633
</li><li>Follow JDBC specification on Procedures MetaData, use P0 as
noelgrandin's avatar
noelgrandin committed
634
    return type of procedure.
635
</li><li>Issue 531: IDENTITY ignored for added column.
636
</li><li>FileSystem: improve exception throwing compatibility with JDK
Thomas Mueller's avatar
Thomas Mueller committed
637
</li><li>Spatial Index: adjust costs so we do not use the spatial index if the
noelgrandin's avatar
noelgrandin committed
638 639 640
    query does not contain an intersects operator.
</li><li>Fix multi-threaded deadlock when using a View that includes a TableFunction.
</li><li>Fix bug in dividing very-small BigDecimal numbers.
noelgrandin's avatar
noelgrandin committed
641
</li></ul>
Thomas Mueller's avatar
Thomas Mueller committed
642 643

<h2>Version 1.4.178 Beta (2014-05-02)</h2>
644 645
<ul><li>Issue 559: Make dependency on org.osgi.service.jdbc optional.
</li><li>Improve error message when the user specifies an unsupported combination of database settings.
646
</li><li>MVStore: in the multi-threaded mode, NullPointerException and other exceptions could occur.
647
</li><li>MVStore: some database file could not be compacted due to a bug in
648 649
    the bookkeeping of the fill rate. Also, database file were compacted quite slowly.
    This has been improved; but more changes in this area are expected.
650
</li><li>MVStore: support for volatile maps (that don't store changes).
651
</li><li>MVStore mode: in-memory databases now also use the MVStore.
652
</li><li>In server mode, appending ";autocommit=false" to the database URL was working,
653
    but the return value of Connection.getAutoCommit() was wrong.
654
</li><li>Issue 561: OSGi: the import package declaration of org.h2 excluded version 1.4.
655 656
</li><li>Issue 558: with the MVStore, a NullPointerException could occur when using LOBs
    at session commit (LobStorageMap.removeLob).
657 658
</li><li>Remove the "h2.MAX_MEMORY_ROWS_DISTINCT" system property to reduce confusion.
    We already have the MAX_MEMORY_ROWS setting which does a very similar thing, and is better documented.
659
</li><li>Issue 554: Web Console in an IFrame was not fully supported.
660 661
</li></ul>

Thomas Mueller's avatar
Thomas Mueller committed
662
<h2>Version 1.4.177 Beta (2014-04-12)</h2>
Thomas Mueller's avatar
Thomas Mueller committed
663
<ul><li>By default, the MV_STORE option is enabled, so it is using the new MVStore
Thomas Mueller's avatar
Thomas Mueller committed
664
    storage. The MVCC setting is by default set to the same values as the MV_STORE setting,
Thomas Mueller's avatar
Thomas Mueller committed
665
    so it is also enabled by default. For testing, both settings can be disabled by appending
666
    ";MV_STORE=FALSE" and/or ";MVCC=FALSE" to the database URL.
Thomas Mueller's avatar
Thomas Mueller committed
667 668
</li><li>The file locking method 'serialized' is no longer supported.
    This mode might return in a future version,
Thomas Mueller's avatar
Thomas Mueller committed
669 670 671
    however this is not clear right now.
    A new implementation and new tests would be needed.
</li><li>Enable the new storage format for dates (system property "h2.storeLocalTime").
672 673 674 675 676
    For the MVStore mode, this is always enabled, but with version 1.4
    this is even enabled in the PageStore mode.
</li><li>Implicit relative paths are disabled (system property "h2.implicitRelativePath"),
    so that the database URL jdbc:h2:test now needs to be written as jdbc:h2:./test.
</li><li>"select ... fetch first 1 row only" is supported with the regular mode.
677
    This was disabled so far because "fetch" and "offset" are now keywords.
678 679 680
    See also Mode.supportOffsetFetch.
</li><li>Byte arrays are now sorted in unsigned mode
    (x'99' is larger than x'09').
Thomas Mueller's avatar
Thomas Mueller committed
681
    (System property "h2.sortBinaryUnsigned", Mode.binaryUnsigned, setting "binary_collation").
682 683 684 685 686
</li><li>Csv.getInstance will be removed in future versions of 1.4.
    Use the public constructor instead.
</li><li>Remove support for the limited old-style outer join syntax using "(+)".
    Use "outer join" instead.
    System property "h2.oldStyleOuterJoin".
687
</li><li>Support the data type "DATETIME2" as an alias for "DATETIME", for MS SQL Server compatibility.
688
</li><li>Add Oracle-compatible TRANSLATE function, patch by Eric Chatellier.
Thomas Mueller's avatar
Thomas Mueller committed
689 690 691
</li></ul>

<h2>Version 1.3.176 (2014-04-05)</h2>
Thomas Mueller's avatar
Thomas Mueller committed
692 693 694 695 696
<ul><li>The file locking method 'serialized' is no longer documented,
    as it will not be available in version 1.4.
</li><li>The static method Csv.getInstance() was removed.
    Use the public constructor instead.
</li><li>The default user name for the Script, RunScript, Shell,
697 698
    and CreateCluster tools are no longer "sa" but an empty string.
</li><li>The stack trace of the exception "The object is already closed" is no longer logged by default.
699
</li><li>If a value of a result set was itself a result set, the result
700 701
    could only be read once.
</li><li>Column constraints are also visible in views (patch from Nicolas Fortin for H2GIS).
702
</li><li>Granting a additional right to a role that already had a right for that table was not working.
703
</li><li>Spatial index: a few bugs have been fixed (using spatial constraints in views,
704
    transferring geometry objects over TCP/IP, the returned geometry object is copied when needed).
705
</li><li>Issue 551: the datatype documentation was incorrect (found by Bernd Eckenfels).
706
</li><li>Issue 368: ON DUPLICATE KEY UPDATE did not work for multi-row inserts.
707 708
    Test case from Angus Macdonald.
</li><li>OSGi: the package javax.tools is now imported (as an optional).
709
</li><li>H2 Console: auto-complete is now disabled by default, but there is a hot-key (Ctrl+Space).
Thomas Mueller's avatar
Thomas Mueller committed
710 711
</li><li>H2 Console: auto-complete did not work with multi-line statements.
</li><li>CLOB and BLOB data was not immediately removed after a rollback.
712
</li><li>There is a new Aggregate API that supports the internal H2 data types
713 714
    (GEOMETRY for example). Thanks a lot to Nicolas Fortin for the patch!
</li><li>Referential integrity constraints sometimes used the wrong index,
715 716 717
    such that updating a row in the referenced table incorrectly failed with
    a constraint violation.
</li><li>The Polish translation was completed and corrected by Wojtek Jurczyk. Thanks a lot!
718
</li><li>Issue 545: Unnecessary duplicate code was removed.
719
</li><li>The profiler tool can now process files with full thread dumps.
720
</li><li>MVStore: the file format was changed slightly.
721
</li><li>MVStore mode: the CLOB and BLOB storage was re-implemented and is
722
    now much faster than with the PageStore (which is still the default storage).
723 724 725 726
</li><li>MVStore mode: creating indexes is now much faster
    (in many cases faster than with the default PageStore).
</li><li>Various bugs in the MVStore storage and have been fixed,
    including a bug in the R-tree implementation.
727
    The database could get corrupt if there were transient IO exceptions while storing.
728
</li><li>The method org.h2.expression.Function.getCost could throw a NullPointException.
729 730
</li><li>Storing LOBs in separate files (outside of the main database file)
    is no longer supported for new databases.
731
</li><li>Lucene 2 is no longer supported.
732
</li><li>Fix bug in calculating default MIN and MAX values for SEQUENCE.
733
</li><li>Fix bug in performing IN queries with multiple values when IGNORECASE=TRUE
734
</li><li>Add entry-point to org.h2.tools.Shell so it can be called from inside an application.
735
    patch by Thomas Gillet.
noelgrandin's avatar
noelgrandin committed
736
</li><li>Fix bug that prevented the PgServer from being stopped and started multiple times.
737
</li><li>Support some more DDL syntax for MySQL, patch from Peter Jentsch.
Thomas Mueller's avatar
Thomas Mueller committed
738
</li><li>Issue 548: TO_CHAR does not format MM and DD correctly when the month or day of
739
    the month is 1 digit, patch from "the.tucc"
Thomas Mueller's avatar
Thomas Mueller committed
740
</li><li>Fix bug in varargs support in ALIAS's, patch from Nicolas Fortin
Thomas Mueller's avatar
Thomas Mueller committed
741 742
</li></ul>

743
<!-- [close] { --></div></td></tr></table><!-- } --><!-- analytics --></body></html>