changelog.html 35.9 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
<ul>
24 25
<li>Prevent people using unsupported combination of auto-increment columns and clustering mode.
</li>
26 27
<li>Support for DB2 time format, patch by Niklas Mehner
</li>
28 29
<li>Added support for Connection.setClientInfo() in compatibility modes for DB2, Postgresql, Oracle and MySQL.
</li>
30 31
<li>Issue #249: Clarify license declaration in Maven POM xml
</li>
32 33
<li>Fix NPE in querying spatial data through a sub-select.
</li>
34 35 36
<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>
37 38
<li>Issue #255: ConcurrentModificationException with multiple threads in embedded mode and temporary LOBs
</li>
39 40
<li>Issue #235: Anonymous SSL connections fail in many situations
</li>
41 42
<li>Fix race condition in FILE_LOCK=SOCKET, which could result in the watchdog thread not running  
</li>
43 44
<li>Experimental support for datatype TIMESTAMP WITH TIMEZONE
</li>
45 46
<li>Add support for ALTER TABLE ... RENAME CONSTRAINT .. TO ...
</li>
47 48
<li>Add support for PostgreSQL ALTER TABLE ... RENAME COLUMN .. TO ...
</li>
49 50
<li>Improve performance of cleaning up temp tables - patch from Eric Faulhaber.
</li>
51 52
<li>Fix bug where table locks were not dropped when the connection closed
</li>
53 54
<li>Fix extra CPU usage caused by query planner enhancement in 1.4.191
</li>
55 56
<li>improve performance of queries that use LIKE 'foo%' - 10x in the case of one of my queries
</li>
57 58
<li>Issue #231: Possible infinite loop when initializing the ObjectDataType class
    when concurrently writing into MVStore.
59
</li>
60
<ul>
61 62 63 64 65 66

<h2>Version 1.4.191 Beta (2016-01-21)</h2>
<ul>
<li>Issue #229: DATEDIFF does not work for 'WEEK'.
</li>
<li>Issue #156: Add support for getGeneratedKeys() when executing commands via PreparedStatement#executeBatch.
67
</li>
68
<li>Issue #195: The new Maven uses a .cmd file instead of a .bat file.
69
</li>
70
<li>Issue #212: EXPLAIN PLAN for UPDATE statement did not display LIMIT expression.
71
</li>
72
<li>Support OFFSET without LIMIT in SELECT.
73
</li>
74
<li>Improve error message for METHOD_NOT_FOUND_1/90087.
75
</li>
76 77
<li>CLOB and BLOB objects of removed rows were sometimes kept in the database file.
</li>
78 79
<li>Server mode: executing "shutdown" left a thread on the server.
</li>
80 81
<li>The condition "in(select...)" did not work correctly in some cases if the subquery had an "order by".
</li>
82 83
<li>Issue #184: The Platform-independent zip had Windows line endings in Linux scripts.
</li>
84
<li>Issue #186: The "script" command did not include sequences of temporary tables.
85
</li>
Thomas Mueller Graf's avatar
Thomas Mueller Graf committed
86
<li>Issue #115: to_char fails with pattern FM0D099.
87
</li>
88 89 90 91 92 93
</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>
94
<li>Issue #180: In MVCC mode, executing UPDATE and SELECT ... FOR UPDATE
95 96
    simultaneously silently can drop rows.
</li>
97 98 99
<li>PageStore storage: the cooperative file locking mechanism
    did not always work as expected (with very slow computers).
</li>
100 101 102
<li>Temporary CLOB and BLOB objects are now removed while the database is open
    (and not just when closing the database).
</li>
103 104
<li>MVStore CLOB and BLOB larger than about 25 MB: An exception could be thrown
    when using the MVStore storage.
105
</li>
106 107
<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
108
</li>
109 110 111 112
</ul>

<h2>Version 1.4.189 Beta (2015-09-13)</h2>
<ul>
113 114
<li>Add support for dropping multiple columns in ALTER TABLE DROP COLUMN...
</li>
115
<li>Fix bug in XA management when doing rollback after prepare. Patch by Stephane Lacoin.
116
</li>
Thomas Mueller Graf's avatar
Thomas Mueller Graf committed
117 118 119 120 121
<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>
122
<li>Fix for issue #171: Broken QueryStatisticsData duration data when trace level smaller than TraceSystem.INFO
123
</li>
Noel Grandin's avatar
Noel Grandin committed
124 125
<li>Pull request #170: Added SET QUERY_STATISTICS_MAX_ENTRIES
</li>
126 127
<li>Pull request #165: Fix compatibility postgresql function string_agg
</li>
128 129
<li>Pull request #163: improved performance when not using the default timezone.
</li>
130 131
<li>Local temporary tables with many rows did not work correctly due to automatic analyze.
</li>
132 133 134
<li>Server mode: concurrently using the same connection could throw an exception
    "Connection is broken: unexpected status".
</li>
135 136
<li>Performance improvement for metadata queries that join against the COLUMNS metadata table.
</li>
137 138 139 140 141 142 143
<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
144 145 146
</ul>

<h2>Version 1.4.188 Beta (2015-08-01)</h2>
147
<ul>
148 149 150 151
<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>
152 153 154
<li>Multi-threaded processing: concurrent deleting the same row could throw the exception
    "Row not found when trying to delete".
</li>
155 156 157
<li>MVStore transactions: a thread could see a change of a different thread
    within a different map. Pull request #153.
</li>
158 159
<li>H2 Console: improved IBM DB2 compatibility.
</li>
160 161 162
<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.
163 164
</li>
<li>Performance improvement for metadata queries that join against the COLUMNS metadata table.
165
</li>
166 167
<li>MVStore: power failure could corrupt the store, if writes were re-ordered.
</li>
168 169 170
<li>For compatibility with other databases, support for (double and float)
    -0.0 has been removed. 0.0 is used instead.
</li>
171 172
<li>Fix for #134, Column name with a # character. Patch by bradmesserle.
</li>
173 174 175 176
<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>
177
<li>Pull request #146: Improved CompareMode.
178
</li>
179 180 181
<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.
182
</li>
183 184
<li>Pull request #137: SourceCompiler should not throw a syntax error on javac warning.
</li>
185 186 187 188 189
<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>
190 191 192
<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
193 194
<li>Pull request #138: Added the simple Oracle function: ORA_HASH (+ tests) #138
</li>
195
<li>Timestamps in the trace log follow the format (yyyy-MM-dd HH:mm:ss) instead
196 197
of the old format (MM-dd HH:mm:ss). Patch by Richard Bull.
</li>
198 199
<li>Pull request #125: Improved Oracle compatibility with "truncate" with timestamps and dates.
</li>
200
<li>Pull request #127: Linked tables now support geometry columns.
201
</li>
202 203
<li>ABS(CAST(0.0 AS DOUBLE)) returned -0.0 instead of 0.0.
</li>
204 205 206
<li>BNF auto-completion failed with unquoted identifiers.
</li>
<li>Oracle compatibility: empty strings were not converted to NULL when using prepared statements.
207
</li><li>PostgreSQL compatibility: new syntax "create index ... using ...".
208
</li><li>There was a bug in DataType.convertToValue when reading a ResultSet from a ResultSet.
209
</li><li>Pull request #116: Improved concurrency in the trace system.
210
</li><li>Issue 609: the spatial index did not support NULL.
211
</li><li>Granting a schema is now supported.
212
</li><li>Linked tables did not work when a function-based index is present (Oracle).
213
</li><li>Creating a user with a null password, salt, or hash threw a NullPointerException.
214
</li><li>Foreign key: don't add a single column index if column
215 216
    is leading key of existing index.
</li><li>Pull request #4: Creating and removing temporary tables was getting
217 218 219
    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.
220
</li><li>Pull request #2: Add external metadata type support (table type "external")
221
</li><li>MS SQL Server: the CONVERT method did not work in views
222
    and derived tables.
223
</li><li>Java 8 compatibility for "regexp_replace".
224 225
</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
226 227 228
</li></ul>

<h2>Version 1.4.187 Beta (2015-04-10)</h2>
Thomas Mueller's avatar
Thomas Mueller committed
229 230 231 232 233 234 235 236 237 238
<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
239 240
</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
241
</li><li>MVStore: in some cases, CLOB/BLOB data blocks were removed
Thomas Mueller's avatar
Thomas Mueller committed
242 243 244
    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
245
</li><li>Using "runscript" with autocommit disabled could result
Thomas Mueller's avatar
Thomas Mueller committed
246 247
    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
248
    Apache Tomcat logged an error message: "The web application ...
Thomas Mueller's avatar
Thomas Mueller committed
249 250 251
    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
252
    failed with a strange error message (NullPointerException),
Thomas Mueller's avatar
Thomas Mueller committed
253
    now a clear error message is shown.
Thomas Mueller's avatar
Thomas Mueller committed
254
</li><li>Issue 605: with version 1.4.186, opening a database could result in
Thomas Mueller's avatar
Thomas Mueller committed
255 256
    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
257
    Before, the select expression list was expanded incorrectly.
Thomas Mueller's avatar
Thomas Mueller committed
258 259
    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
260 261 262 263 264 265 266 267 268
    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:".
269
</li><li>Allow DATEADD to take a long value for count when manipulating milliseconds.
270
</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
271
    so that it was effectively 1024 times smaller than it should be.
272 273
</li><li>Concurrent CREATE TABLE... IF NOT EXISTS in the presence of MULTI_THREAD=TRUE could
    throw an exception.
274
</li><li>Fix bug in MVStore when creating lots of temporary tables, where we could run out of
275
    transaction IDs.
276
</li><li>Add support for PostgreSQL STRING_AGG function. Patch by Fred Aquiles.
Thomas Mueller's avatar
Thomas Mueller committed
277 278
</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
279 280 281
</li></ul>

<h2>Version 1.4.186 Beta (2015-03-02)</h2>
Thomas Mueller's avatar
Thomas Mueller committed
282 283 284 285 286 287
<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
288 289
    (due to an integer overflow).
</li><li>MVStore / TransactionStore: concurrent updates could result in a
290 291
    "Too many open transactions" exception.
</li><li>StringUtils.toUpperEnglish now has a small cache.
292 293
    This should speed up reading from a ResultSet when using the column name.
</li><li>MVStore: up to 65535 open transactions are now supported.
294 295 296
    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
297 298
    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
299
</li><li>Tables without columns didn't work.
Thomas Mueller's avatar
Thomas Mueller committed
300
    (The use case for such tables is testing.)
Thomas Mueller's avatar
Thomas Mueller committed
301
</li><li>The LIRS cache now resizes the table automatically in all cases
Thomas Mueller's avatar
Thomas Mueller committed
302 303 304
    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
305
</li><li>In version 1.4.184, a bug was introduced that broke queries
306 307
    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
308
</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
309
</li><li>Allow declaring triggers as source code (like functions). Patch by Sylvain Cuaz.
Thomas Mueller's avatar
Thomas Mueller committed
310
</li><li>Make the planner use indexes for sorting when doing a GROUP BY where
311
    all of the GROUP BY columns are not mentioned in the select. Patch by Frederico (zepfred).
312
</li><li>PostgreSQL compatibility: generate_series (as an alias for system_range). Patch by litailang.
313
</li><li>Fix missing "column" type in right-hand parameter in ConditionIn. Patch by Arnaud Thimel.
Thomas Mueller's avatar
Thomas Mueller committed
314 315 316
</li></ul>

<h2>Version 1.4.185 Beta (2015-01-16)</h2>
Thomas Mueller's avatar
Thomas Mueller committed
317 318
<ul><li>In version 1.4.184, "group by" ignored the table name,
    and could pick a select column by mistake.
319 320
    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,
321 322 323 324
    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.
325
</li><li>Issue 594: Profiler.copyInThread does not work properly.
326 327
</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.
328 329
</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.
330
    Reported by Alexander Nesterov.
331
</li><li>Issue 552: Implement BIT_AND and BIT_OR aggregate functions.
Thomas Mueller's avatar
Thomas Mueller committed
332 333
</li></ul>

Thomas Mueller's avatar
Thomas Mueller committed
334
<h2>Version 1.4.184 Beta (2014-12-19)</h2>
335 336 337 338
<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
339 340
</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
341 342
</li><li>Reading from a StreamStore now throws an
    IOException if the underlying data doesn't exist.
343
</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
344 345
</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
346
</li><li>Group by with a quoted select column name alias didn't work. Example:
Thomas Mueller's avatar
Thomas Mueller committed
347 348
    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
349 350 351
</li></ul>

<h2>Version 1.4.183 Beta (2014-12-13)</h2>
Thomas Mueller's avatar
Thomas Mueller committed
352 353 354 355
<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
356
    if the outer query contained constraints for the given view. Example:
Thomas Mueller's avatar
Thomas Mueller committed
357
    select b.nr, b.id from (select row_number() over() as nr, a.id as id
358 359
    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.
360 361
</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
362 363 364
    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
365 366 367 368
</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
369
</li><li>MVStore: use a mark and sweep GC algorithm instead of reference counting,
370 371
    to ensure used chunks are never overwrite, even if the reference counting
    algorithm does not work properly.
Thomas Mueller's avatar
Thomas Mueller committed
372
</li><li>In the multi-threaded mode, updating the column selectivity ("analyze")
Thomas Mueller's avatar
Thomas Mueller committed
373
    in the background sometimes did not work.
Thomas Mueller's avatar
Thomas Mueller committed
374
</li><li>In the multi-threaded mode, database metadata operations
Thomas Mueller's avatar
Thomas Mueller committed
375 376 377 378 379 380 381 382 383
    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
384 385 386 387 388 389 390 391
    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.
392 393
    The system property to disable secure anonymous connections is now
    "h2.enableAnonymousTLS".
394
    The default certificate is still self-signed, so you need to manually install
395 396 397
    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.
398
</li><li>Issue 581: When running in LOCK_MODE=0,
399 400
        JdbcDatabaseMetaData#supportsTransactionIsolationLevel(TRANSACTION_READ_UNCOMMITTED)
    should return false
401
</li><li>Fix bug which could generate deadlocks when multiple connections accessed the same table.
402 403
</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
404
</li><li>Fix "USE schema" command for MySQL compatibility, patch by mfulton
405
</li><li>Parse and ignore the ROW_FORMAT=DYNAMIC MySQL syntax, patch by mfulton
Thomas Mueller's avatar
Thomas Mueller committed
406 407 408
</li></ul>

<h2>Version 1.4.182 Beta (2014-10-17)</h2>
409 410 411
<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
412 413 414 415 416 417 418 419 420 421 422 423
</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.
424
</li><li>CSV tool: the rowSeparator option is no longer supported,
425 426
    as the same can be achieved with the lineSeparator.
</li><li>Descending indexes on MVStore tables did not work properly.
427
</li><li>Issue 579: Conditions on the "_rowid_" pseudo-column didn't use an index
428 429 430
    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.
431
</li><li>Issue 573: Add implementation for Methods "isWrapperFor()" and "unwrap()" in
432
    other JDBC classes.
433
</li><li>Issue 572: MySQL compatibility for "order by" in update statements.
434 435 436 437
</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
438 439 440
</li></ul>

<h2>Version 1.4.181 Beta (2014-08-06)</h2>
441 442 443
<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.
444
</li><li>The database option "defrag_always=true" did not work with the MVStore.
445
</li><li>The JDBC escape syntax {ts 'value'} did not interpret the value as a timestamp.
446 447
    The same for {d 'value'} (for date) and {t 'value'} (for time).
    Thanks to Lukas Eder for reporting the issue.
448 449 450 451 452
    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.
453 454
</li><li>File system abstraction: support replacing existing files using move
    (currently not for Windows).
455
</li><li>The statement "shutdown defrag" now compresses the database (with the MVStore).
456 457 458 459 460
    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!
461
</li><li>Change default value of PAGE_SIZE from 2048 to 4096 to more closely match most file systems block size
462
    (PageStore only; the MVStore already used 4096).
463
</li><li>Auto-scale MAX_MEMORY_ROWS and CACHE_SIZE settings by the amount of available RAM. Gives a better
464
    out of box experience for people with more powerful machines.
465
</li><li>Handle tabs like 4 spaces in web console, patch by Martin Grajcar.
466
</li><li>Issue 573: Add implementation for Methods "isWrapperFor()" and "unwrap()" in JdbcConnection.java,
467
    patch by BigMichi1.
Thomas Mueller's avatar
Thomas Mueller committed
468 469 470
</li></ul>

<h2>Version 1.4.180 Beta (2014-07-13)</h2>
471 472
<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
473
</li><li>Sequences of temporary tables (auto-increment or identity columns)
Thomas Mueller's avatar
Thomas Mueller committed
474 475 476 477 478 479
    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
480
</li><li>Add client-info property to get the number of servers currently in the cluster
Thomas Mueller's avatar
Thomas Mueller committed
481
    and which servers that are available. (patch from Nikolaj Fogh)
Thomas Mueller's avatar
Thomas Mueller committed
482
</li><li>Fix bug in changing encrypted DB password that kept the file handle
Thomas Mueller's avatar
Thomas Mueller committed
483 484 485
    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.
486
</li></ul>
Thomas Mueller's avatar
Thomas Mueller committed
487 488

<h2>Version 1.4.179 Beta (2014-06-23)</h2>
489 490
<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
491 492 493
    (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
494 495
    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
496 497 498 499
    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
500 501
    (null was ordered last).
</li><li>Large result sets now always create temporary tables instead of temporary files.
502
</li><li>When using the PageStore, opening a database failed in some cases with a NullPointerException
503 504 505 506 507 508 509 510 511 512
    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
513
    key was Serializable and the other was of a common class.
Thomas Mueller's avatar
Thomas Mueller committed
514
</li><li>Recursive queries with many result rows (more than the setting "max_memory_rows")
515 516 517 518
    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
519
</li><li>Issue 566: MVStore: unique indexes that were created later on did not work correctly
520
    if there were over 5000 rows in the table.
Thomas Mueller's avatar
Thomas Mueller committed
521
    Existing databases need to be re-created (at least the broken index need to be re-built).
Thomas Mueller's avatar
Thomas Mueller committed
522
</li><li>MVStore: creating secondary indexes on large tables
523 524
    results in missing rows in the index.
</li><li>Metadata: the password of linked tables is now only visible for admin users.
525
</li><li>For Windows, database URLs of the form "jdbc:h2:/test" where considered
526
    relative and did not work unless the system property "h2.implicitRelativePath" was used.
527
</li><li>Windows: using a base directory of "C:/" and similar did not work as expected.
528
</li><li>Follow JDBC specification on Procedures MetaData, use P0 as
noelgrandin's avatar
noelgrandin committed
529
    return type of procedure.
530
</li><li>Issue 531: IDENTITY ignored for added column.
531
</li><li>FileSystem: improve exception throwing compatibility with JDK
Thomas Mueller's avatar
Thomas Mueller committed
532
</li><li>Spatial Index: adjust costs so we do not use the spatial index if the
noelgrandin's avatar
noelgrandin committed
533 534 535
    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
536
</li></ul>
Thomas Mueller's avatar
Thomas Mueller committed
537 538

<h2>Version 1.4.178 Beta (2014-05-02)</h2>
539 540
<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.
541
</li><li>MVStore: in the multi-threaded mode, NullPointerException and other exceptions could occur.
542
</li><li>MVStore: some database file could not be compacted due to a bug in
543 544
    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.
545
</li><li>MVStore: support for volatile maps (that don't store changes).
546
</li><li>MVStore mode: in-memory databases now also use the MVStore.
547
</li><li>In server mode, appending ";autocommit=false" to the database URL was working,
548
    but the return value of Connection.getAutoCommit() was wrong.
549
</li><li>Issue 561: OSGi: the import package declaration of org.h2 excluded version 1.4.
550 551
</li><li>Issue 558: with the MVStore, a NullPointerException could occur when using LOBs
    at session commit (LobStorageMap.removeLob).
552 553
</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.
554
</li><li>Issue 554: Web Console in an IFrame was not fully supported.
555 556
</li></ul>

Thomas Mueller's avatar
Thomas Mueller committed
557
<h2>Version 1.4.177 Beta (2014-04-12)</h2>
Thomas Mueller's avatar
Thomas Mueller committed
558
<ul><li>By default, the MV_STORE option is enabled, so it is using the new MVStore
Thomas Mueller's avatar
Thomas Mueller committed
559
    storage. The MVCC setting is by default set to the same values as the MV_STORE setting,
Thomas Mueller's avatar
Thomas Mueller committed
560
    so it is also enabled by default. For testing, both settings can be disabled by appending
561
    ";MV_STORE=FALSE" and/or ";MVCC=FALSE" to the database URL.
Thomas Mueller's avatar
Thomas Mueller committed
562 563
</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
564 565 566
    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").
567 568 569 570 571
    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.
572
    This was disabled so far because "fetch" and "offset" are now keywords.
573 574 575
    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
576
    (System property "h2.sortBinaryUnsigned", Mode.binaryUnsigned, setting "binary_collation").
577 578 579 580 581
</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".
582
</li><li>Support the data type "DATETIME2" as an alias for "DATETIME", for MS SQL Server compatibility.
583
</li><li>Add Oracle-compatible TRANSLATE function, patch by Eric Chatellier.
Thomas Mueller's avatar
Thomas Mueller committed
584 585 586
</li></ul>

<h2>Version 1.3.176 (2014-04-05)</h2>
Thomas Mueller's avatar
Thomas Mueller committed
587 588 589 590 591
<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,
592 593
    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.
594
</li><li>If a value of a result set was itself a result set, the result
595 596
    could only be read once.
</li><li>Column constraints are also visible in views (patch from Nicolas Fortin for H2GIS).
597
</li><li>Granting a additional right to a role that already had a right for that table was not working.
598
</li><li>Spatial index: a few bugs have been fixed (using spatial constraints in views,
599
    transferring geometry objects over TCP/IP, the returned geometry object is copied when needed).
600
</li><li>Issue 551: the datatype documentation was incorrect (found by Bernd Eckenfels).
601
</li><li>Issue 368: ON DUPLICATE KEY UPDATE did not work for multi-row inserts.
602 603
    Test case from Angus Macdonald.
</li><li>OSGi: the package javax.tools is now imported (as an optional).
604
</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
605 606
</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.
607
</li><li>There is a new Aggregate API that supports the internal H2 data types
608 609
    (GEOMETRY for example). Thanks a lot to Nicolas Fortin for the patch!
</li><li>Referential integrity constraints sometimes used the wrong index,
610 611 612
    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!
613
</li><li>Issue 545: Unnecessary duplicate code was removed.
614
</li><li>The profiler tool can now process files with full thread dumps.
615
</li><li>MVStore: the file format was changed slightly.
616
</li><li>MVStore mode: the CLOB and BLOB storage was re-implemented and is
617
    now much faster than with the PageStore (which is still the default storage).
618 619 620 621
</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.
622
    The database could get corrupt if there were transient IO exceptions while storing.
623
</li><li>The method org.h2.expression.Function.getCost could throw a NullPointException.
624 625
</li><li>Storing LOBs in separate files (outside of the main database file)
    is no longer supported for new databases.
626
</li><li>Lucene 2 is no longer supported.
627
</li><li>Fix bug in calculating default MIN and MAX values for SEQUENCE.
628
</li><li>Fix bug in performing IN queries with multiple values when IGNORECASE=TRUE
629
</li><li>Add entry-point to org.h2.tools.Shell so it can be called from inside an application.
630
    patch by Thomas Gillet.
noelgrandin's avatar
noelgrandin committed
631
</li><li>Fix bug that prevented the PgServer from being stopped and started multiple times.
632
</li><li>Support some more DDL syntax for MySQL, patch from Peter Jentsch.
Thomas Mueller's avatar
Thomas Mueller committed
633
</li><li>Issue 548: TO_CHAR does not format MM and DD correctly when the month or day of
634
    the month is 1 digit, patch from "the.tucc"
Thomas Mueller's avatar
Thomas Mueller committed
635
</li><li>Fix bug in varargs support in ALIAS's, patch from Nicolas Fortin
Thomas Mueller's avatar
Thomas Mueller committed
636 637
</li></ul>

638
<!-- [close] { --></div></td></tr></table><!-- } --><!-- analytics --></body></html>