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<h1 align=center>Release History</h1>

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<p>

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This page provides a high-level summary of changes to SQLite.

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For more detail, refer the Fossil checkin logs at

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http://www.sqlite.org/src/timeline</a> and

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http://www.sqlite.org/src/timeline?t=release</a>

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</p>

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<li><a href="inmemorydb.html">In-memory databases</a> that are specified using

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<a href="uri.html">URI filenames</a> are allowed to use <a href="sharedcache.html#inmemsharedcache">shared cache</a>,

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so that the same

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in-memory database can be accessed from multiple database connections.

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<li>Recognize and use the <a href="uri.html#coreqp">mode=memory</a> query parameter in

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<a href="uri.html">URI filenames</a>.

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<li>Avoid resetting the schema of <a href="sharedcache.html">shared cache</a> connections when any one

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connection closes. Instead, wait for the last connection to close before

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reseting the schema.

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<li>In the <a href="rtree.html">RTREE</a> extension, when rounding 64-bit floating point numbers

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to 32-bit for storage, always round in a direction that causes the

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bounding box to get larger.

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<li>Adjust the unix driver to avoid unnecessary calls to fchown().

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<li>Add interfaces sqlite3_quota_ferror() and sqlite3_quota_file_available()

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to the test_quota.c module.

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<li>The <a href="c3ref/create_module.html">sqlite3_create_module()</a> and <a href="c3ref/create_module.html">sqlite3_create_module_v2()</a> interfaces

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return SQLITE_MISUSE on any attempt to overload or replace a <a href="vtab.html">virtual table</a>

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module. The destructor is always called in this case, in accordance with

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historical and current documentation.

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</ul></p><a name="version_3_7_12_1"></a>

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<li>Fix a bug

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<a href="http://www.sqlite.org/src/info/c2ad16f997ee9c">(ticket c2ad16f997)</a>

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in the 3.7.12 release that can cause a segfault for certain

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obscure nested aggregate queries.

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<li>Fix various other minor test script problems.

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<li>SQLITE_SOURCE_ID:

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"2012-05-22 02:45:53 6d326d44fd1d626aae0e8456e5fa2049f1ce0789"

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<li>SHA1 for sqlite3.c: d494e8d81607f0515d4f386156fb0fd86d5ba7df

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</ul></p><a name="version_3_7_12"></a>

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<li>Add the <a href="c3ref/c_dbstatus_options.html#sqlitedbstatuscachewrite">SQLITE_DBSTATUS_CACHE_WRITE</a> option for <a href="c3ref/db_status.html">sqlite3_db_status()</a>.

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<li>Optimize the <a href="lang_corefunc.html#typeof">typeof()</a> and <a href="lang_corefunc.html#length">length()</a> SQL functions so that they avoid

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unnecessary reading of database content from disk.

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<li>Add the <a href="fts3.html#*fts4mergecmd">FTS4 "merge" command</a>, the <a href="fts3.html#*fts4automergecmd">FTS4 "automerge" command</a>, and

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the <a href="fts3.html#*fts4ickcmd">FTS4 "integrity-check" command</a>.

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<li>Report the name of specific <a href="lang_createtable.html#ckconst">CHECK</a> constraints that fail.

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<li>In the command-line shell, use popen() instead of fopen() if the first

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character of the argument to the ".output" command is "|".

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<li>Make use of OVERLAPPED in the windows <a href="vfs.html">VFS</a> to avoid some system calls

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and thereby obtain a performance improvement.

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<li>More aggressive optimization of the AND operator when one side or the

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other is always false.

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<li>Improved performance of queries with many OR-connected terms in the

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WHERE clause that can all be indexed.

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<li>Add the <a href="compile.html#rtree_int_only">SQLITE_RTREE_INT_ONLY</a> compile-time option to force the

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<a href="rtree.html">R*Tree Extension Module</a> to use integer instead of

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floating point values for both storage and computation.

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<li>Enhance the <a href="pragma.html#pragma_integrity_check">PRAGMA integrity_check</a> command to use much less memory when

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processing multi-gigabyte databases.

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<li>New interfaces added to the test_quota.c add-on module.

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<li>Added the ".trace" dot-command to the command-line shell.

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<li>Allow virtual table constructors to be invoked recursively.

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<li>Improved optimization of ORDER BY clauses on compound queries.

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<li>Improved optimization of aggregate subqueries contained within an

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aggregate query.

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<li>Bug fix: Fix the <a href="lang_savepoint.html">RELEASE</a> command so that it does not cancel pending

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queries. This repairs a problem introduced in 3.7.11.

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<li>Bug fix: Do not discard the DISTINCT as superfluous unless a subset of

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the result set is subject to a UNIQUE constraint <em>and</em> it none

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of the columns in that subset can be NULL.

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Ticket <a href="http://www.sqlite.org/src/info/385a5b56b9">385a5b56b9</a>.

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<li>Bug fix: Do not optimize away an ORDER BY clause that has the same terms

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as a UNIQUE index unless those terms are also NOT NULL.

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Ticket <a href="http://www.sqlite.org/src/info/2a5629202f">2a5629202f</a>.

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<li>SQLITE_SOURCE_ID:

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"2012-05-14 01:41:23 8654aa9540fe9fd210899d83d17f3f407096c004"

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<li>SHA1 for sqlite3.c: 57e2104a0f7b3f528e7f6b7a8e553e2357ccd2e1

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</ul></p><a name="version_3_7_11"></a>

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<h3>2012 March 20 (3.7.11)</h3><p><ul>

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<li>Enhance the <a href="lang_insert.html">INSERT</a> syntax to allow multiple rows to be inserted

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via the VALUES clause.

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<li>Enhance the <a href="lang_createvtab.html">CREATE VIRTUAL TABLE</a> command to support the

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IF NOT EXISTS clause.

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<li>Added the <a href="c3ref/stricmp.html">sqlite3_stricmp()</a> interface as a counterpart to

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<a href="c3ref/stricmp.html">sqlite3_strnicmp()</a>.

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<li>Added the <a href="c3ref/db_readonly.html">sqlite3_db_readonly()</a> interface.

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<li>Added the <a href="c3ref/c_fcntl_chunk_size.html#sqlitefcntlpragma">SQLITE_FCNTL_PRAGMA</a> file control, giving <a href="vfs.html">VFS</a> implementations

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the ability to add new <a href="pragma.html#syntax">PRAGMA</a> statements or to override built-in

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PRAGMAs.

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<li>Queries of the form: "SELECT max(x), y FROM table" returns the

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value of y on the same row that contains the maximum x value.

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<li>Added support for the <a href="fts3.html#*fts4languageid">FTS4 languageid option</a>.

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<li>Documented support for the <a href="fts3.html#*fts4content">FTS4 content option</a>. This feature has

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actually been in the code since <a href="#version_3_7_9">version 3.7.9</a> but is only now considered

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to be officially supported.

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<li>Pending statements no longer block <a href="lang_transaction.html">ROLLBACK</a>. Instead, the pending

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statement will return SQLITE_ABORT upon next access after the ROLLBACK.

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<li>Improvements to the handling of CSV inputs in the <a href="sqlite.html">command-line shell</a>

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<li>Fix a <a href="http://www.sqlite.org/src/info/b7c8682cc1">bug</a> introduced

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in <a href="#version_3_7_10">version 3.7.10</a> that might cause a LEFT JOIN

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to be incorrectly converted into an INNER JOIN if the WHERE clause

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indexable terms connected by OR.

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<li>SQLITE_SOURCE_ID:

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"2012-03-20 11:35:50 00bb9c9ce4f465e6ac321ced2a9d0062dc364669"

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<li>SHA1 for sqlite3.c: d460d7eda3a9dccd291aed2a9fda868b9b120a10

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</ul></p><a name="version_3_7_10"></a>

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<h3>2012 January 16 (3.7.10)</h3><p><ul>

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<li>The default <a href="fileformat2.html#schemaformat">schema format number</a> is changed from 1 to 4.

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This means that, unless

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the <a href="pragma.html#pragma_legacy_file_format">PRAGMA legacy_file_format=ON</a> statement is

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run, newly created database files will be unreadable by version of SQLite

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prior to 3.3.0 (2006-01-10). It also means that the <a href="lang_createindex.html#descidx">descending indices</a>

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are enabled by default.

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<li>The sqlite3_pcache_methods structure and the <a href="c3ref/c_config_getmalloc.html#sqliteconfigpcache">SQLITE_CONFIG_PCACHE</a>

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and <a href="c3ref/c_config_getmalloc.html#sqliteconfiggetpcache">SQLITE_CONFIG_GETPCACHE</a> configuration parameters are deprecated.

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They are replaced by a new <a href="c3ref/pcache_methods2.html">sqlite3_pcache_methods2</a> structure and

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<a href="c3ref/c_config_getmalloc.html#sqliteconfigpcache2">SQLITE_CONFIG_PCACHE2</a> and <a href="c3ref/c_config_getmalloc.html#sqliteconfiggetpcache2">SQLITE_CONFIG_GETPCACHE2</a> configuration

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parameters.

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<li>Added the <a href="psow.html">powersafe overwrite</a> property to the VFS interface. Provide

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the <a href="c3ref/c_iocap_atomic.html">SQLITE_IOCAP_POWERSAFE_OVERWRITE</a> I/O capability, the

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<a href="compile.html#powersafe_overwrite">SQLITE_POWERSAFE_OVERWRITE</a> compile-time option, and the

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"psow=BOOLEAN" query parameter for <a href="uri.html">URI filenames</a>.

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<li>Added the <a href="c3ref/db_release_memory.html">sqlite3_db_release_memory()</a> interface and the

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<a href="pragma.html#pragma_shrink_memory">shrink_memory pragma</a>.

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<li>Added the <a href="c3ref/db_filename.html">sqlite3_db_filename()</a> interface.

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<li>Added the <a href="c3ref/stmt_busy.html">sqlite3_stmt_busy()</a> interface.

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<li>Added the <a href="c3ref/uri_boolean.html">sqlite3_uri_boolean()</a> and <a href="c3ref/uri_boolean.html">sqlite3_uri_int64()</a> interfaces.

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<li>If the argument to <a href="pragma.html#pragma_cache_size">PRAGMA cache_size</a> is negative N, that means to use

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approximately -1024*N bytes of memory for the page cache regardless of

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the page size.

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<li>Enhanced the default memory allocator to make use of _msize() on windows,

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malloc_size() on Mac, and malloc_usable_size() on Linux.

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<li>Enhanced the query planner to support index queries with range constraints

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on the rowid.

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<li>Enhanced the query planner flattening logic to allow UNION ALL compounds

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to be promoted upwards to replace a simple wrapper SELECT even if the

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compounds are joins.

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<li>Enhanced the query planner so that the xfer optimization can be used with

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INTEGER PRIMARY KEY ON CONFLICT as long as the destination table is

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initially empty.

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<li>Enhanced the windows <a href="vfs.html">VFS</a> so that all system calls can be overridden

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using the xSetSystemCall interface.

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<li>Updated the "unix-dotfile" <a href="vfs.html">VFS</a> to use locking directories with mkdir()

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and rmdir() instead of locking files with open() and unlink().

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<li>Enhancements to the test_quota.c extension to support stdio-like interfaces

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with quotas.

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<li>Change the unix <a href="vfs.html">VFS</a> to be tolerant of read() system calls that return

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less then the full number of requested bytes.

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<li>Change both unix and windows <a href="vfs.html">VFSes</a> to report a sector size of 4096

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instead of the old default of 512.

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<li>In the <a href="tclsqlite.html">TCL Interface</a>, add the -uri option to the "sqlite3" TCL command

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used for creating new database connection objects.

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<li>Added the <a href="c3ref/c_testctrl_always.html">SQLITE_TESTCTRL_EXPLAIN_STMT</a> test-control option with the

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<a href="compile.html#enable_tree_explain">SQLITE_ENABLE_TREE_EXPLAIN</a> compile-time option to enable the

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<a href="sqlite.html">command-line shell</a> to display ASCII-art parse trees of SQL statements

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that it processes, for debugging and analysis.

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Add an additional xSync when restarting a WAL in order to prevent an

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exceedingly unlikely but theoretically possible

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database corruption following power-loss.

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Ticket <a href="http://www.sqlite.org/src/info/ff5be73dee">ff5be73dee</a>.

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Change the VDBE so that all registers are initialized to Invalid

290

instead of NULL.

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Ticket <a href="http://www.sqlite.org/src/info/7bbfb7d442">7bbfb7d442</a>

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Fix problems that can result from 32-bit integer overflow.

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Ticket <a href="http://www.sqlite.org/src/info/ac0ff496b7e2">ac00f496b7e2</a>

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<li>SQLITE_SOURCE_ID:

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"2012-01-16 13:28:40 ebd01a8deffb5024a5d7494eef800d2366d97204"

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<li>SHA1 for sqlite3.c: 6497cbbaad47220bd41e2e4216c54706e7ae95d4

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</ul></p><a name="version_3_7_9"></a>

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<h3>2011 November 1 (3.7.9)</h3><p><ul>

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<li>If a search token (on the right-hand side of the MATCH operator) in

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<a href="fts3.html#fts4">FTS4</a> begins with "^" then that token must be the first in its field

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of the document. <b>** Potentially Incompatible Change **</b>

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<li>Added options <a href="c3ref/c_dbstatus_options.html#sqlitedbstatuscachehit">SQLITE_DBSTATUS_CACHE_HIT</a> and <a href="c3ref/c_dbstatus_options.html#sqlitedbstatuscachemiss">SQLITE_DBSTATUS_CACHE_MISS</a>

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to the <a href="c3ref/db_status.html">sqlite3_db_status()</a> interface.

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<li>Removed support for <a href="compile.html#enable_stat2">SQLITE_ENABLE_STAT2</a>, replacing it with the much

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more capable <a href="compile.html#enable_stat3">SQLITE_ENABLE_STAT3</a> option.

307

<li>Enhancements to the sqlite3_analyzer utility program, including the

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--pageinfo and --stats options and support for multiplexed databases.

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<li>Enhance the <a href="c3ref/data_count.html">sqlite3_data_count()</a> interface so that it can be used to

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determine if SQLITE_DONE has been seen on the prepared statement.

311

<li>Added the <a href="c3ref/c_fcntl_chunk_size.html#sqlitefcntloverwrite">SQLITE_FCNTL_OVERWRITE</a> file-control by which the SQLite core

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indicates to the VFS that the current transaction will overwrite the

313

entire database file.

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<li>Increase the default <a href="malloc.html#lookaside">lookaside memory allocator</a> allocation size from

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100 to 128 bytes.

316

<li>Enhanced the query planner so that it can factor terms in and out of

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OR expressions in the WHERE clause in an effort to find better indices.

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<li>Added the <a href="compile.html#direct_overflow_read">SQLITE_DIRECT_OVERFLOW_READ</a> compile-time option, causing

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<a href="fileformat2.html#ovflpgs">overflow pages</a> to be read directly from the database file,

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bypassing the <a href="c3ref/pcache_methods2.html">page cache</a>.

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<li>Remove limits on the magnitude of precision and width value in the

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format specifiers of the <a href="c3ref/mprintf.html">sqlite3_mprintf()</a> family of string rendering

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routines.

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<li>Fix a bug that prevent <a href="lang_altertable.html">ALTER TABLE ... RENAME</a> from working

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on some virtual tables in a database with a UTF16 encoding.

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<li>Fix a bug in ASCII-to-float conversion that causes slow performance and

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incorrect results when converting numbers with ridiculously large exponents.

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<li>Fix a bug that causes incorrect results in aggregate queries that use

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multiple aggregate functions whose arguments contain complicated expressions

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that differ only in the case of string literals contained within those

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expressions.

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<li>Fix a bug that prevented the <a href="pragma.html#pragma_page_count">page_count</a> and <a href="pragma.html#pragma_quick_check">quick_check</a> pragmas from

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working correctly if their names were capitalized.

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<li>Fix a bug that caused <a href="lang_vacuum.html">VACUUM</a> to fail if the <a href="pragma.html#pragma_count_changes">count_changes pragma</a> was

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engaged.

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<li>Fix a bug in <a href="vtab.html">virtual table</a> implementation that causes a crash if

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an <a href="fts3.html#fts4">FTS4</a> table is <a href="lang_droptable.html">dropped</a> inside a transaction and

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a <a href="lang_savepoint.html">SAVEPOINT</a> occurs afterwards.

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<li>SQLITE_SOURCE_ID:

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"2011-11-01 00:52:41 c7c6050ef060877ebe77b41d959e9df13f8c9b5e"

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<li>SHA1 for sqlite3.c: becd16877f4f9b281b91c97e106089497d71bb47

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</ul></p><a name="version_3_7_8"></a>

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<h3>2011 September 19 (3.7.8)</h3><p><ul>

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<li> Orders of magnitude performance improvement for <a href="lang_createindex.html">CREATE INDEX</a> on

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very large tables.

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<li> Improved the windows VFS to better defend against interference

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from anti-virus software.

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<li> Improved query plan optimization when the DISTINCT keyword is present.

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<li> Allow more system calls to be overridden in the unix VFS - to provide

350

better support for chromium sandboxes.

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<li> Increase the default size of a lookahead cache line from 100 to 128 bytes.

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<li> Enhancements to the test_quota.c module so that it can track

353

preexisting files.

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<li> Bug fix: Virtual tables now handle IS NOT NULL constraints correctly.

355

<li> Bug fixes: Correctly handle nested correlated subqueries used with

356

indices in a WHERE clause.

357

<li> SQLITE_SOURCE_ID:

358

"2011-09-19 14:49:19 3e0da808d2f5b4d12046e05980ca04578f581177"

359

<li> SHA1 for sqlite3.c: bfcd74a655636b592c5dba6d0d5729c0f8e3b4de

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</ul></p><a name="version_3_7_7_1"></a>

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<li> Fix <a href="http://www.sqlite.org/src/info/25ee812710">a bug</a> causing

363

<a href="pragma.html#pragma_case_sensitive_like">PRAGMA case_sensitive_like</a> statements compiled using sqlite3_prepare()

364

to fail with an <a href="c3ref/c_abort.html">SQLITE_SCHEMA</a> error.

365

<li> SQLITE_SOURCE_ID:

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"2011-06-28 17:39:05 af0d91adf497f5f36ec3813f04235a6e195a605f"

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<li> SHA1 for sqlite3.c: d47594b8a02f6cf58e91fb673e96cb1b397aace0

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</ul></p><a name="version_3_7_7"></a>

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<li> Add support for <a href="uri.html">URI filenames</a>

371

<li> Add the <a href="c3ref/vtab_config.html">sqlite3_vtab_config()</a> interface in

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support of <a href="lang_conflict.html">ON CONFLICT</a> clauses with <a href="vtab.html">virtual tables</a>.

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<li> Add the <a href="vtab.html#xsavepoint">xSavepoint</a>, <a href="vtab.html#xsavepoint">xRelease</a> and <a href="vtab.html#xsavepoint">xRollbackTo</a> methods in

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<a href="vtab.html">virtual tables</a> in support of <a href="lang_savepoint.html">SAVEPOINT</a> for virtual tables.

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<li> Update the built-in <a href="fts3.html">FTS3/FTS4</a> and <a href="rtree.html">RTREE</a> virtual tables to support

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<a href="lang_conflict.html">ON CONFLICT</a> clauses and <a href="lang_replace.html">REPLACE</a>.

377

<li> Avoid unnecessary reparsing of the database schema.

378

<li> Added support for the <a href="fts3.html#fts4prefix">FTS4 prefix option</a> and the <a href="fts3.html#fts4order">FTS4 order option</a>.

379

<li> Allow <a href="wal.html">WAL-mode</a> databases to be opened read-only as long as

380

there is an existing read/write connection.

381

<li> Added support for <a href="shortnames.html">short filenames</a>.

382

<li> SQLITE_SOURCE_ID:

383

"2011-06-23 19:49:22 4374b7e83ea0a3fbc3691f9c0c936272862f32f2"

384

<li> SHA1 for sqlite3.c: 5bbe79e206ae5ffeeca760dbd0d66862228db551

385

</ul></p><a name="version_3_7_6_3"></a>

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387

<li> Fix a problem with <a href="wal.html">WAL mode</a> which could cause transactions to

388

silently rollback if the <a href="pragma.html#pragma_cache_size">cache_size</a> is set very small (less than 10)

389

and SQLite comes under memory pressure.

390

</ul></p><a name="version_3_7_6_2"></a>

391

<h3>2011 April 17 (3.7.6.2)</h3><p><ul>

392

<li> Fix the function prototype for the open(2) system call to agree with

393

POSIX. Without this fix, pthreads does not work correctly on NetBSD.

394

<li> SQLITE_SOURCE_ID:

395

"2011-04-17 17:25:17 154ddbc17120be2915eb03edc52af1225eb7cb5e"

396

<li> SHA1 for sqlite3.c: 806577fd524dd5f3bfd8d4d27392ed2752bc9701

397

398

</ul></p><a name="version_3_7_6_1"></a>

399

<h3>2011 April 14 (3.7.6.1)</h3><p><ul>

400

<li> Fix a bug in 3.7.6 that only appears if the <a href="c3ref/c_fcntl_chunk_size.html#sqlitefcntlsizehint">SQLITE_FCNTL_SIZE_HINT</a>

401

file control is used with a build of SQLite that makes use of the

402

HAVE_POSIX_FALLOCATE compile-time option and which has

403

SQLITE_ENABLE_LOCKING_MODE turned off.

404

<li> SQLITE_SOURCE_ID:

405

"2011-04-13 14:40:25 a35e83eac7b185f4d363d7fa51677f2fdfa27695"

406

<li> SHA1 for sqlite3.c: b81bfa27d3e09caf3251475863b1ce6dd9f6ab66

407

</ul></p><a name="version_3_7_6"></a>

408

<h3>2011 April 12 (3.7.6)</h3><p><ul>

409

<li> Added the <a href="c3ref/wal_checkpoint_v2.html">sqlite3_wal_checkpoint_v2()</a> interface and enhanced the

410

<a href="pragma.html#pragma_wal_checkpoint">wal_checkpoint pragma</a> to support blocking checkpoints.

411

<li> Improvements to the query planner so that it makes better estimates of

412

plan costs and hence does a better job of choosing the right plan,

413

especially when <a href="compile.html#enable_stat2">SQLITE_ENABLE_STAT2</a> is used.

414

<li> Fix a bug which prevented deferred foreign key constraints from being

415

enforced when <a href="c3ref/finalize.html">sqlite3_finalize()</a> was not

416

called by one statement with a failed foreign key constraint prior to

417

another statement with foreign key constraints running.

418

<li> Integer arithmetic operations that would have resulted in overflow

419

are now performed using floating-point instead.

420

<li> Increased the version number on the <a href="c3ref/vfs.html">VFS object</a> to

421

3 and added new methods xSetSysCall, xGetSysCall, and xNextSysCall

422

used for doing full-coverage testing.

423

<li> Increase the maximum value of <a href="limits.html#max_attached">SQLITE_MAX_ATTACHED</a> from 30 to 62

424

(though the default value remains at 10).

425

<li> Enhancements to FTS4:

426

427

<li> Added the <a href="fts3.html#fts4aux">fts4aux</a> table

428

<li> Added support for <a href="fts3.html#*fts4compression">compressed FTS4 content</a>

429

</ol>

430

<li> Enhance the <a href="lang_analyze.html">ANALYZE</a> command to support the name of an index

431

as its argument, in order to analyze just that one index.

432

<li> Added the "unix-excl" built-in VFS on unix and unix-like platforms.

433

<li> SQLITE_SOURCE_ID:

434

"2011-04-12 01:58:40 f9d43fa363d54beab6f45db005abac0a7c0c47a7"

435

<li> SHA1 for sqlite3.c: f38df08547efae0ff4343da607b723f588bbd66b

436

</ul></p><a name="version_3_7_5"></a>

437

<h3>2011 February 01 (3.7.5)</h3><p><ul>

438

<li> Added the <a href="c3ref/mprintf.html">sqlite3_vsnprintf()</a> interface.

439

<li> Added the <a href="c3ref/c_dbstatus_options.html#sqlitedbstatuslookasidehit">SQLITE_DBSTATUS_LOOKASIDE_HIT</a>,

440

<a href="c3ref/c_dbstatus_options.html#sqlitedbstatuslookasidemisssize">SQLITE_DBSTATUS_LOOKASIDE_MISS_SIZE</a>, and

441

<a href="c3ref/c_dbstatus_options.html#sqlitedbstatuslookasidemissfull">SQLITE_DBSTATUS_LOOKASIDE_MISS_FULL</a> options for the

442

<a href="c3ref/db_status.html">sqlite3_db_status()</a> interface.

443

<li> Added the <a href="compile.html#omit_autoreset">SQLITE_OMIT_AUTORESET</a> compile-time option.

444

<li> Added the <a href="compile.html#default_foreign_keys">SQLITE_DEFAULT_FOREIGN_KEYS</a> compile-time option.

445

<li> Updates to <a href="c3ref/stmt_readonly.html">sqlite3_stmt_readonly()</a> so that its result is well-defined

446

for all prepared statements and so that it works with <a href="lang_vacuum.html">VACUUM</a>.

447

<li> Added the "-heap" option to the <a href="sqlite.html">command-line shell</a>

448

<li> Fix <a href="http://www.sqlite.org/src/info/5d863f876e">a bug</a> involving

449

frequent changes in and out of WAL mode and

450

VACUUM that could (in theory) cause database corruption.

451

<li> Enhance the <a href="c3ref/profile.html">sqlite3_trace()</a> mechanism so that nested SQL statements

452

such as might be generated by virtual tables are shown but are shown

453

in comments and without parameter expansion. This

454

greatly improves tracing output when using the FTS3/4 and/or RTREE

455

virtual tables.

456

<li> Change the xFileControl() methods on all built-in VFSes to return

457

<a href="c3ref/c_abort.html">SQLITE_NOTFOUND</a> instead of <a href="c3ref/c_abort.html">SQLITE_ERROR</a> for an unrecognized

458

operation code.

459

<li> The SQLite core invokes the <a href="c3ref/c_fcntl_chunk_size.html#sqlitefcntlsyncomitted">SQLITE_FCNTL_SYNC_OMITTED</a>

460

<a href="c3ref/file_control.html">file control</a>

461

to the VFS in place of a call to xSync if the database has

462

<a href="pragma.html#pragma_synchronous">PRAGMA synchronous</a> set to OFF.

463

</ul></p><a name="version_3_7_4"></a>

464

<h3>2010 December 08 (3.7.4)</h3><p><ul>

465

<li> Added the <a href="c3ref/blob_reopen.html">sqlite3_blob_reopen()</a> interface to allow an existing

466

<a href="c3ref/blob.html">sqlite3_blob</a> object to be rebound to a new row.

467

<li> Use the new <a href="c3ref/blob_reopen.html">sqlite3_blob_reopen()</a> interface to improve the performance

468

of FTS.

469

<li> <a href="c3ref/vfs.html">VFSes</a> that do not support shared memory are allowed

470

to access <a href="wal.html">WAL</a> databases if <a href="pragma.html#pragma_locking_mode">PRAGMA locking_mode</a> is set to EXCLUSIVE.

471

<li> Enhancements to <a href="eqp.html">EXPLAIN QUERY PLAN</a>.

472

<li> Added the <a href="c3ref/stmt_readonly.html">sqlite3_stmt_readonly()</a> interface.

473

<li> Added <a href="pragma.html#pragma_checkpoint_fullfsync">PRAGMA checkpoint_fullfsync</a>.

474

<li> Added the <a href="c3ref/c_fcntl_chunk_size.html#sqlitefcntlfilepointer">SQLITE_FCNTL_FILE_POINTER</a> option

475

to <a href="c3ref/file_control.html">sqlite3_file_control()</a>.

476

<li> Added support for <a href="fts3.html#fts4">FTS4</a> and enhancements

477

to the FTS <a href="fts3.html#matchinfo">matchinfo()</a> function.

478

<li> Added the test_superlock.c module which provides example

479

code for obtaining an exclusive lock to a rollback

480

or WAL database.

481

<li> Added the test_multiplex.c module which provides

482

an example VFS that provides multiplexing (sharding)

483

of a DB, splitting it over multiple files of fixed size.

484

<li> A <a href="http://www.sqlite.org/src/info/80ba201079">very obscure bug</a>

485

associated with the <a href="optoverview.html#or_opt">or optimization</a> was fixed.

486

</ul></p><a name="version_3_7_3"></a>

487

<h3>2010 October 08 (3.7.3)</h3><p><ul>

488

<li> Added the <a href="c3ref/create_function.html">sqlite3_create_function_v2()</a> interface that includes a

489

destructor callback.

490

<li> Added support for <a href="rtree.html#customquery">custom r-tree queries</a> using application-supplied

491

callback routines to define the boundary of the query region.

492

<li> The default page cache strives more diligently to avoid using memory

493

beyond what is allocated to it by <a href="c3ref/c_config_getmalloc.html#sqliteconfigpagecache">SQLITE_CONFIG_PAGECACHE</a>. Or if

494

using page cache is allocating from the heap, it strives to avoid

495

going over the <a href="c3ref/soft_heap_limit64.html">sqlite3_soft_heap_limit64()</a>, even if

496

<a href="compile.html#enable_memory_management">SQLITE_ENABLE_MEMORY_MANAGEMENT</a> is not set.

497

<li> Added the <a href="c3ref/soft_heap_limit64.html">sqlite3_soft_heap_limit64()</a> interface as a replacement for

498

<a href="c3ref/soft_heap_limit.html">sqlite3_soft_heap_limit()</a>.

499

<li> The <a href="lang_analyze.html">ANALYZE</a> command now gathers statistics on tables even if they

500

have no indices.

501

<li> Tweaks to the query planner to help it do a better job of finding the

502

most efficient query plan for each query.

503

<li> Enhanced the internal text-to-numeric conversion routines so that they

504

work with UTF8 or UTF16, thereby avoiding some UTF16-to-UTF8 text

505

conversions.

506

<li> Fix a problem that was causing excess memory usage with large <a href="wal.html">WAL</a>

507

transactions in win32 systems.

508

<li> The interface between the VDBE and B-Tree layer is enhanced such that

509

the VDBE provides hints to the B-Tree layer letting the B-Tree layer

510

know when it is safe to use hashing instead of B-Trees for transient

511

tables.

512

<li> Miscellaneous documentation enhancements.

513

</ul></p><a name="version_3_7_2"></a>

514

<h3>2010 August 24 (3.7.2)</h3><p><ul>

515

516

old and very obscure bug</a> that can lead to corruption of the

517

database <a href="fileformat2.html#freelist">free-page list</a> when <a href="pragma.html#pragma_incremental_vacuum">incremental_vacuum</a> is used.

518

</ul></p><a name="version_3_7_1"></a>

519

<h3>2010 August 23 (3.7.1)</h3><p><ul>

520

<li> Added new commands <a href="c3ref/c_dbstatus_options.html#sqlitedbstatusschemaused">SQLITE_DBSTATUS_SCHEMA_USED</a> and

521

<a href="c3ref/c_dbstatus_options.html#sqlitedbstatusstmtused">SQLITE_DBSTATUS_STMT_USED</a> to the <a href="c3ref/db_status.html">sqlite3_db_status()</a> interface, in

522

order to report out the amount of memory used to hold the schema and

523

prepared statements of a connection.

524

<li> Increase the maximum size of a database pages from 32KiB to 64KiB.

525

<li> Use the <a href="optoverview.html#like_opt">LIKE optimization</a> even if the right-hand side string contains

526

no wildcards.

527

<li> Added the <a href="c3ref/c_fcntl_chunk_size.html#sqlitefcntlchunksize">SQLITE_FCNTL_CHUNK_SIZE</a> verb to the <a href="c3ref/file_control.html">sqlite3_file_control()</a>

528

interface for both unix and windows, to cause database files to grow in

529

large chunks in order to reduce disk fragmentation.

530

<li> Fixed a bug in the query planner that caused performance regressions

531

relative to 3.6.23.1 on some complex joins.

532

<li> Fixed a typo in the OS/2 backend.

533

<li> Refactored the pager module.

534

<li> The SQLITE_MAX_PAGE_SIZE compile-time option is now silently ignored.

535

The maximum page size is hard-coded at 65536 bytes.

536

</ul></p><a name="version_3_7_0_1"></a>

537

<h3>2010 August 04 (3.7.0.1)</h3><p><ul>

538

<li> Fix a potential database corruption bug that can occur if version 3.7.0

539

and version 3.6.23.1 alternately write to the same database file.

540

541

Ticket [51ae9cad317a1]</a>

542

<li> Fix a performance regression related to the query planner enhancements

543

of version 3.7.0.

544

</ul></p><a name="version_3_7_0"></a>

545

546

<li> Added support for <a href="wal.html">write-ahead logging</a>.

547

<li> Query planner enhancement - automatic transient indices are created

548

when doing so reduces the estimated query time.

549

<li> Query planner enhancement - the ORDER BY becomes a no-op if the query

550

also contains a GROUP BY clause that forces the correct output order.

551

<li> Add the <a href="c3ref/c_dbstatus_options.html#sqlitedbstatuscacheused">SQLITE_DBSTATUS_CACHE_USED</a> verb for <a href="c3ref/db_status.html">sqlite3_db_status()</a>.

552

<li> The logical database size is now stored in the database header so that

553

bytes can be appended to the end of the database file without corrupting

554

it and so that SQLite will work correctly on systems that lack support

555

for ftruncate().

556

</ul></p><a name="version_3_6_23_1"></a>

557

<h3>2010 March 30 (3.6.23.1)</h3><p><ul>

558

<li> Fix a bug in the offsets() function of <a href="fts3.html">FTS3</a>

559

<li> Fix a missing "sync" that when omitted could lead to database

560

corruption if a power failure or OS crash occurred just as a

561

ROLLBACK operation was finishing.

562

</ul></p><a name="version_3_6_23"></a>

563

<h3>2010 March 09 (3.6.23)</h3><p><ul>

564

<li> Added the <a href="pragma.html#pragma_secure_delete">secure_delete pragma</a>.

565

<li> Added the <a href="c3ref/compileoption_get.html">sqlite3_compileoption_used()</a> and

566

<a href="c3ref/compileoption_get.html">sqlite3_compileoption_get()</a> interfaces as well as the

567

<a href="pragma.html#pragma_compile_options">compile_options pragma</a> and the <a href="lang_corefunc.html#sqlite_compileoption_used">sqlite_compileoption_used()</a> and

568

<a href="lang_corefunc.html#sqlite_compileoption_get">sqlite_compileoption_get()</a> SQL functions.

569

<li> Added the <a href="c3ref/log.html">sqlite3_log()</a> interface together with the

570

<a href="c3ref/c_config_getmalloc.html#sqliteconfiglog">SQLITE_CONFIG_LOG</a> verb to <a href="c3ref/config.html">sqlite3_config()</a>. The ".log" command

571

is added to the <a href="sqlite.html">Command Line Interface</a>.

572

<li> Improvements to <a href="fts3.html">FTS3</a>.

573

<li> Improvements and bug-fixes in support for <a href="compile.html#omit_floating_point">SQLITE_OMIT_FLOATING_POINT</a>.

574

<li> The <a href="pragma.html#pragma_integrity_check">integrity_check pragma</a> is enhanced to detect out-of-order rowids.

575

<li> The ".genfkey" operator has been removed from the

576

<a href="sqlite.html">Command Line Interface</a>.

577

<li> Updates to the co-hosted Lemon LALR(1) parser generator. (These

578

updates did not affect SQLite.)

579

<li> Various minor bug fixes and performance enhancements.

580

</ul></p><a name="version_3_6_22"></a>

581

582

<li>Fix bugs that can (rarely) lead to incorrect query results when

583

the CAST or OR operators are used in the WHERE clause of a query.

584

<li>Continuing enhancements and improvements to <a href="fts3.html">FTS3</a>.

585

<li>Other miscellaneous bug fixes.

586

</ul></p><a name="version_3_6_21"></a>

587

588

<li>The SQL output resulting from <a href="c3ref/profile.html">sqlite3_trace()</a> is now modified to include

589

the values of <a href="lang_expr.html#varparam">bound parameters</a>.

590

<li>Performance optimizations targeting a specific use case from

591

a single high-profile user of SQLite. A 12% reduction in the number of

592

CPU operations is achieved (as measured by Valgrind). Actual performance

593

improvements in practice may vary depending on workload. Changes

594

include:

595

<ul>

596

<li>The <a href="lang_corefunc.html#ifnull">ifnull()</a> and <a href="lang_corefunc.html#coalesce">coalesce()</a> SQL functions are now implemented

597

using in-line VDBE code rather than calling external functions, so that

598

unused arguments need never be evaluated.

599

<li>The <a href="lang_corefunc.html#substr">substr()</a> SQL function does not bother to measure the length

600

its entire input string if it is only computing a prefix

601

<li>Unnecessary OP_IsNull, OP_Affinity, and OP_MustBeInt VDBE opcodes

602

are suppressed

603

<li>Various code refactorizations for performance

604

</ul>

605

<li>The FTS3 extension has undergone a major rework and cleanup.

606

New <a href="fts3.html">FTS3 documentation</a> is now available.

607

<li>The <a href="compile.html#secure_delete">SQLITE_SECURE_DELETE</a> compile-time option fixed to make sure that

608

content is deleted even when the <a href="lang_delete.html#truncateopt">truncate optimization</a> applies.

609

<li>Improvements to "dot-command" handling in the

610

<a href="sqlite.html">Command Line Interface</a>.

611

<li>Other minor bug fixes and documentation enhancements.

612

</ul></p><a name="version_3_6_20"></a>

613

614

<li>Optimizer enhancement: <a href="c3ref/stmt.html">prepared statements</a> are automatically

615

re-compiled when a binding on the RHS of a LIKE operator changes or

616

when any range constraint changes under <a href="compile.html#enable_stat2">SQLITE_ENABLE_STAT2</a>.

617

<li>Various minor bug fixes and documentation enhancements.

618

</ul></p><a name="version_3_6_16_1"></a>

619

620

<li>A small patch to version 3.6.16 to fix

621

<a href="http://www.sqlite.org/src/info/6b00e0a34c">the OP_If bug</a>.

622

</ul></p><a name="version_3_6_19"></a>

623

624

<li>Added support for <a href="foreignkeys.html">foreign key constraints</a>. Foreign key constraints

625

are disabled by default. Use the <a href="pragma.html#pragma_foreign_keys">foreign_keys pragma</a> to turn them on.

626

<li>Generalized the IS and IS NOT operators to take arbitrary expressions

627

on their right-hand side.

628

<li>The <a href="tclsqlite.html">TCL Interface</a> has been enhanced to use the

629

<a href="http://www.tcl.tk/cgi-bin/tct/tip/322.html">Non-Recursive Engine (NRE)</a>

630

interface to the TCL interpreter when linked against TCL 8.6 or later.

631

<li>Fix a bug introduced in 3.6.18 that can lead to a segfault when an

632

attempt is made to write on a read-only database.

633

</ul></p><a name="version_3_6_18"></a>

634

635

<li>Versioning of the SQLite source code has transitioned from CVS to

636

<a href="http://www.fossil-scm.org/">Fossil</a>.

637

<li>Query planner enhancements.

638

<li>The <a href="compile.html#enable_stat2">SQLITE_ENABLE_STAT2</a> compile-time option causes the <a href="lang_analyze.html">ANALYZE</a>

639

command to collect a small histogram of each index, to help SQLite better

640

select among competing range query indices.

641

<li>Recursive triggers can be enabled using the <a href="pragma.html#pragma_recursive_triggers">PRAGMA recursive_triggers</a>

642

statement.

643

<li>Delete triggers fire when rows are removed due to a

644

<a href="lang_conflict.html">REPLACE conflict resolution</a>. This feature is only

645

enabled when recursive triggers are enabled.

646

<li>Added the <a href="c3ref/c_open_autoproxy.html">SQLITE_OPEN_SHAREDCACHE</a> and <a href="c3ref/c_open_autoproxy.html">SQLITE_OPEN_PRIVATECACHE</a>

647

flags for <a href="c3ref/open.html">sqlite3_open_v2()</a> used to override the global

648

<a href="sharedcache.html">shared cache mode</a> settings for individual database connections.

649

<li>Added improved version identification features:

650

C-Preprocessor macro <a href="c3ref/c_source_id.html">SQLITE_SOURCE_ID</a>,

651

C/C++ interface <a href="c3ref/libversion.html">sqlite3_sourceid()</a>, and SQL function <a href="lang_corefunc.html#sqlite_source_id">sqlite_source_id()</a>.

652

<li>Obscure bug fix on triggers

653

(<a href="http://www.sqlite.org/src/info/efc02f9779">[efc02f9779]</a>).

654

</ul></p><a name="version_3_6_17"></a>

655

656

<li>Expose the <a href="c3ref/stricmp.html">sqlite3_strnicmp()</a> interface for use by extensions and

657

applications.

658

<li>Remove the restriction on <a href="vtab.html">virtual tables</a> and <a href="sharedcache.html">shared cache mode</a>.

659

Virtual tables and shared cache can now be used at the same time.

660

<li>Many code simplifications and obscure bug fixes in support of

661

providing <a href="testing.html#coverage">100% branch test coverage</a>.

662

</ul></p><a name="version_3_6_16"></a>

663

664

<li>Fix a bug (ticket #3929) that occasionally causes INSERT or UPDATE

665

operations to fail on an indexed table that has a self-modifying trigger.

666

<li>Other minor bug fixes and performance optimizations.

667

</ul></p><a name="version_3_6_15"></a>

668

669

<li>Refactor the internal representation of SQL expressions so that they

670

use less memory on embedded platforms.

671

<li>Reduce the amount of stack space used

672

<li>Fix an 64-bit alignment bug on HP/UX and Sparc

673

<li>The <a href="c3ref/create_function.html">sqlite3_create_function()</a> family of interfaces now return

674

<a href="c3ref/c_abort.html">SQLITE_MISUSE</a> instead of <a href="c3ref/c_abort.html">SQLITE_ERROR</a> when passed invalid

675

parameter combinations.

676

<li>When new tables are created using CREATE TABLE ... AS SELECT ... the

677

datatype of the columns is the simplified SQLite datatype (TEXT, INT,

678

REAL, NUMERIC, or BLOB) instead of a copy of the original datatype from

679

the source table.

680

<li>Resolve race conditions when checking for a hot rollback journal.

681

<li>The <a href="c3ref/initialize.html">sqlite3_shutdown()</a> interface frees all mutexes under windows.

682

<li>Enhanced robustness against corrupt database files

683

<li>Continuing improvements to the test suite and fixes to obscure

684

bugs and inconsistencies that the test suite improvements are

685

uncovering.

686

687

</ul></p><a name="version_3_6_14_2"></a>

688

689

<li>Fix a code generator bug introduced in <a href="#version_3_6_14">version 3.6.14</a>. This bug

690

can cause incorrect query results under obscure circumstances.

691

<a href="http://www.sqlite.org/cvstrac/tktview?tn=3879">Ticket #3879</a>.

692

</ul></p><a name="version_3_6_14_1"></a>

693

694

<li>Fix a bug in <a href="lang_aggfunc.html#groupconcat">group_concat()</a>, <a href="http://www.sqlite.org/cvstrac/tktview?tn=3841">ticket #3841</a>

695

<li>Fix a performance bug in the pager cache, <a href="http://www.sqlite.org/cvstrac/tktview?tn=3844">ticket #3844</a>

696

<li>Fix a bug in the <a href="c3ref/backup.html">sqlite3_backup</a> implementation that can lead

697

to a corrupt backup database. <a href="http://www.sqlite.org/cvstrac/tktview?tn=3858">Ticket #3858</a>.

698

</ul></p><a name="version_3_6_14"></a>

699

700

<li>Added the optional <a href="asyncvfs.html">asynchronous VFS</a> module.</li>

701

<li>Enhanced the query optimizer so that <a href="vtab.html">virtual tables</a> are able to

702

make use of OR and IN operators in the WHERE clause.</li>

703

<li>Speed improvements in the btree and pager layers.</li>

704

<li>Added the <a href="compile.html#have_isnan">SQLITE_HAVE_ISNAN</a> compile-time option which will cause

705

the isnan() function from the standard math library to be used instead

706

of SQLite's own home-brew NaN checker.</li>

707

<li>Countless minor bug fixes, documentation improvements, new and

708

improved test cases, and code simplifications and cleanups.</p>

709

</ul></p><a name="version_3_6_13"></a>

710

<h3>2009 April 13 (3.6.13)</h3><p><ul>

711

<li>Fix a bug in <a href="#version_3_6_12">version 3.6.12</a> that causes a segfault when running

712

a count(*) on the sqlite_master table of an empty database. Ticket #3774.

713

<li>Fix a bug in <a href="#version_3_6_12">version 3.6.12</a> that causes a segfault that when

714

inserting into a table using a DEFAULT value where there is a

715

function as part of the DEFAULT value expression. Ticket #3791.

716

<li>Fix data structure alignment issues on Sparc. Ticket #3777.

717

<li>Other minor bug fixes.

718

</ul></p><a name="version_3_6_12"></a>

719

<h3>2009 March 31 (3.6.12)</h3><p><ul>

720

<li>Fixed a bug that caused database corruption when an <a href="pragma.html#pragma_incremental_vacuum">incremental_vacuum</a> is

721

rolled back in an in-memory database. Ticket #3761.

722

<li>Added the <a href="c3ref/unlock_notify.html">sqlite3_unlock_notify()</a> interface.

723

<li>Added the <a href="pragma.html#pragma_reverse_unordered_selects">reverse_unordered_selects pragma</a>.

724

<li>The default page size on windows is automatically adjusted to match the

725

capabilities of the underlying filesystem.

726

<li>Add the new ".genfkey" command in the <a href="sqlite.html">CLI</a> for generating triggers to

727

implement foreign key constraints.

728

<li>Performance improvements for "count(*)" queries.

729

<li>Reduce the amount of heap memory used, especially by TRIGGERs.

730

<li>

731

</ul></p><a name="version_3_6_11"></a>

732

733

<li>Added the <a href="c3ref/backup_finish.html#sqlite3backupinit">hot-backup interface</a>.

734

<li>Added new commands ".backup" and ".restore" to the <a href="sqlite.html">CLI</a>.

735

<li>Added new methods <a href="tclsqlite.html#backup">backup</a> and

736

<a href="tclsqlite.html#restore">restore</a> to the TCL interface.

737

<li>Improvements to the <a href="syntaxdiagrams.html">syntax bubble

738

diagrams</a>

739

<li>Various minor bug fixes

740

</ul></p><a name="version_3_6_10"></a>

741

742

<li>Fix a cache coherency problem that could lead to database corruption.

743

<a href="http://www.sqlite.org/cvstrac/tktview?tn=3584">Ticket #3584</a>.

744

</ul></p><a name="version_3_6_9"></a>

745

746

<li>Fix two bugs, which when combined might result in incorrect

747

query results. Both bugs were harmless by themselves; only when

748

they team up do they cause problems. <a href="http://www.sqlite.org/cvstrac/tktview?tn=3581">Ticket #3581</a>.

749

</ul></p><a name="version_3_6_8"></a>

750

751

<li>Added support for <a href="lang_savepoint.html">nested transactions</a></li>

752

<li>Enhanced the query optimizer so that it is able to use

753

multiple indices to efficiently process

754

<a href="optoverview.html#or_opt">OR-connected constraints</a>

755

in a WHERE clause.</li>

756

<li>Added support for parentheses in FTS3 query patterns using the

757

<a href="compile.html#enable_fts3_parenthesis">SQLITE_ENABLE_FTS3_PARENTHESIS</a> compile-time option.</li>

758

</ul></p><a name="version_3_6_7"></a>

759

760

<li>Reorganize the Unix interface in os_unix.c</li>

761

<li>Added support for "Proxy Locking" on Mac OS X.</li>

762

<li>Changed the prototype of the <a href="c3ref/auto_extension.html">sqlite3_auto_extension()</a> interface in a

763

way that is backwards compatible but which might cause warnings in new

764

builds of applications that use that interface.</li>

765

<li>Changed the signature of the xDlSym method of the <a href="c3ref/vfs.html">sqlite3_vfs</a> object

766

in a way that is backwards compatible but which might cause

767

compiler warnings.</li>

768

<li>Added superfluous casts and variable initializations in order

769

to suppress nuisance compiler warnings.</li>

770

<li>Fixes for various minor bugs.</li>

771

</ul></p><a name="version_3_6_6_2"></a>

772

773

<li>Fix a bug in the b-tree delete algorithm that seems like it might be

774

able to cause database corruption. The bug was first introduced in

775

<a href="#version_3_6_6">version 3.6.6</a> by check-in [5899] on 2008-11-13.</li>

776

<li>Fix a memory leak that can occur following a disk I/O error.</li>

777

</ul></p><a name="version_3_6_6_1"></a>

778

779

<li>Fix a bug in the page cache that can lead database corruption following

780

a rollback. This bug was first introduced in <a href="#version_3_6_4">version 3.6.4</a>.</li>

781

<li>Two other very minor bug fixes</li>

782

</ul></p><a name="version_3_6_6"></a>

783

784

<li>Fix a #define that prevented <a href="malloc.html#memsys5">memsys5</a> from compiling</li>

785

<li>Fix a problem in the virtual table commit mechanism that was causing

786

a crash in FTS3. <a href="http://www.sqlite.org/cvstrac/tktview?tn=3497">Ticket #3497</a>.</li>

787

<li>Add the <a href="c3ref/pcache_methods2.html">application-defined page cache</a></li>

788

<li>Added built-in support for VxWorks</li>

789

</ul></p><a name="version_3_6_5"></a>

790

791

<li>Add the MEMORY option to the <a href="pragma.html#pragma_journal_mode">journal_mode pragma</a>.</li>

792

<li>Added the <a href="c3ref/db_mutex.html">sqlite3_db_mutex()</a> interface.</li>

793

<li>Added the <a href="compile.html#omit_truncate_optimization">SQLITE_OMIT_TRUNCATE_OPTIMIZATION</a> compile-time option.</li>

794

<li>Fixed the <a href="lang_delete.html#truncateopt">truncate optimization</a> so that <a href="c3ref/changes.html">sqlite3_changes()</a> and

795

<a href="c3ref/total_changes.html">sqlite3_total_changes()</a> interfaces and the <a href="pragma.html#pragma_count_changes">count_changes pragma</a>

796

return the correct values.</li>

797

<li>Added the <a href="c3ref/errcode.html">sqlite3_extended_errcode()</a> interface.</li>

798

<li>The <a href="lang_transaction.html">COMMIT</a> command now succeeds even if there are pending queries.

799

It returns <a href="c3ref/c_abort.html">SQLITE_BUSY</a> if there are pending incremental BLOB I/O requests.

800

<li>The error code is changed to <a href="c3ref/c_abort.html">SQLITE_BUSY</a> (instead of <a href="c3ref/c_abort.html">SQLITE_ERROR</a>)

801

when an attempt is made to <a href="lang_transaction.html">ROLLBACK</a> while one or more queries are

802

still pending.</li>

803

<li>Drop all support for the <a href="malloc.html#memsysx">experimental memory allocators</a> memsys4 and

804

memsys6.</li>

805

<li>Added the <a href="compile.html#zero_malloc">SQLITE_ZERO_MALLOC</a> compile-time option.</li>

806

</ul></p><a name="version_3_6_4"></a>

807

808

<li>Add option support for LIMIT and ORDER BY clauses on <a href="lang_delete.html">DELETE</a> and

809

<a href="lang_update.html">UPDATE</a> statements. Only works if SQLite is compiled with

810

<a href="compile.html#enable_update_delete_limit">SQLITE_ENABLE_UPDATE_DELETE_LIMIT</a>.

811

<li>Added the <a href="c3ref/stmt_status.html">sqlite3_stmt_status()</a> interface for performance monitoring.</li>

812

<li>Add the <a href="lang_indexedby.html">INDEXED BY</a> clause.</li>

813

<li>The LOCKING_STYLE extension is now enabled by default on Mac OS X</li>

814

<li>Added the TRUNCATE option to <a href="pragma.html#pragma_journal_mode">PRAGMA journal_mode</a></li>

815

<li>Performance enhancements to tree balancing logic in the B-Tree layer.</li>

816

<li>Added the

817

818

source code</a> and

819

820

documentation</a> for the <b>genfkey</b> program for automatically generating

821

triggers to enforce foreign key constraints.</li>

822

<li>Added the <a href="compile.html#omit_truncate_optimization">SQLITE_OMIT_TRUNCATE_OPTIMIZATION</a> compile-time option.</li>

823

<li>The <a href="lang.html">SQL language documentation</a> is converted to use

824

<a href="syntaxdiagrams.html">syntax diagrams</a> instead of BNF.</li>

825

<li>Other minor bug fixes</li>

826

</ul></p><a name="version_3_6_3"></a>

827

828

<li>Fix for a bug in the SELECT DISTINCT logic that was introduced by the

829

prior version.</li>

830

<li>Other minor bug fixes</li>

831

</ul></p><a name="version_3_6_2"></a>

832

833

<li>Split the pager subsystem into separate pager and pcache subsystems.</li>

834

<li>Factor out identifier resolution procedures into separate files.</li>

835

<li>Bug fixes</li>

836

</ul></p><a name="version_3_6_1"></a>

837

838

<li>Added the <a href="malloc.html#lookaside">lookaside memory allocator</a> for a speed improvement in excess

839

of 15% on some workloads. (Your mileage may vary.)</li>

840

<li>Added the <a href="c3ref/c_config_getmalloc.html#sqliteconfiglookaside">SQLITE_CONFIG_LOOKASIDE</a> verb to <a href="c3ref/config.html">sqlite3_config()</a> to control

841

the default lookaside configuration.</li>

842

<li>Added verbs <a href="c3ref/c_status_malloc_count.html#sqlitestatuspagecachesize">SQLITE_STATUS_PAGECACHE_SIZE</a> and

843

<a href="c3ref/c_status_malloc_count.html#sqlitestatusscratchsize">SQLITE_STATUS_SCRATCH_SIZE</a> to the <a href="c3ref/status.html">sqlite3_status()</a> interface.

844

<li>Modified <a href="c3ref/c_config_getmalloc.html#sqliteconfigpagecache">SQLITE_CONFIG_PAGECACHE</a> and <a href="c3ref/c_config_getmalloc.html#sqliteconfigscratch">SQLITE_CONFIG_SCRATCH</a> to remove

845

the "+4" magic number in the buffer size computation.

846

<li>Added the <a href="c3ref/db_config.html">sqlite3_db_config()</a> and <a href="c3ref/db_status.html">sqlite3_db_status()</a> interfaces for

847

controlling and monitoring the lookaside allocator separately on each

848

<a href="c3ref/sqlite3.html">database connection</a>.</li>

849

<li>Numerous other performance enhancements</li>

850

<li>Miscellaneous minor bug fixes</li>

851

</ul></p><h3>2008 July 16 (3.6.0 beta)</h3><p><ul>

852

<li>Modifications to the <a href="c3ref/vfs.html">virtual file system</a> interface

853

to support a wider range of embedded systems.

854

See <a href="35to36.html">35to36.html</a> for additional information.

855

<font color="red">*** Potentially incompatible change ***</font></li>

856

<li>All C-preprocessor macros used to control compile-time options

857

now begin with the prefix "SQLITE_". This may require changes to

858

applications that compile SQLite using their own makefiles and with

859

custom compile-time options, hence we mark this as a

860

<font color="red">*** Potentially incompatible change ***</font></li>

861

<li>The SQLITE_MUTEX_APPDEF compile-time option is no longer supported.

862

Alternative mutex implementations can now be added at run-time using

863

the <a href="c3ref/config.html">sqlite3_config()</a> interface with the <a href="c3ref/c_config_getmalloc.html#sqliteconfigmutex">SQLITE_CONFIG_MUTEX</a> verb.

864

<font color="red">*** Potentially incompatible change ***</font></li>

865

<li>The handling of IN and NOT IN operators that contain a NULL on their

866

right-hand side expression is brought into compliance with the SQL

867

standard and with other SQL database engines. This is a bug fix,

868

but as it has the potential to break legacy applications that depend

869

on the older buggy behavior, we mark that as a

870

<font color="red">*** Potentially incompatible change ***</font></li>

871

<li>The result column names generated for compound subqueries have been

872

simplified to show only the name of the column of the original table and

873

omit the table name. This makes SQLite operate more like other SQL

874

database engines.</li>

875

<li>Added the <a href="c3ref/config.html">sqlite3_config()</a> interface for doing run-time configuration

876

of the entire SQLite library.</li>

877

<li>Added the <a href="c3ref/status.html">sqlite3_status()</a> interface used for querying run-time status

878

information about the overall SQLite library and its subsystems.</li>

879

<li>Added the <a href="c3ref/initialize.html">sqlite3_initialize()</a> and <a href="c3ref/initialize.html">sqlite3_shutdown()</a> interfaces.</li>

880

<li>The <a href="c3ref/c_open_autoproxy.html">SQLITE_OPEN_NOMUTEX</a> option was added to <a href="c3ref/open.html">sqlite3_open_v2()</a>.</li>

881

<li>Added the <a href="pragma.html#pragma_page_count">PRAGMA page_count</a> command.</li>

882

<li>Added the <a href="c3ref/next_stmt.html">sqlite3_next_stmt()</a> interface.</li>

883

<li>Added a new <a href="rtree.html">R*Tree virtual table</a></li>

884

</ul></p><a name="version_3_5_9"></a>

885

886

<li>Added <em>experimental</em>

887

support for the <a href="pragma.html#pragma_journal_mode">journal_mode</a> PRAGMA and persistent journal.</li>

888

<li><a href="pragma.html#pragma_journal_mode">Journal mode PERSIST</a> is the default behavior in

889

<a href="pragma.html#pragma_locking_mode">exclusive locking mode</a>.</li>

890

<li>Fix a performance regression on LEFT JOIN (see <a href="http://www.sqlite.org/cvstrac/tktview?tn=3015">ticket #3015</a>)

891

that was mistakenly introduced in <a href="#version_3_5_8">version 3.5.8</a>.</li>

892

<li>Performance enhancement: Reengineer the internal routines used

893

to interpret and render variable-length integers.</li>

894

<li>Fix a buffer-overrun problem in <a href="c3ref/mprintf.html">sqlite3_mprintf()</a> which occurs

895

when a string without a zero-terminator is passed to "%.*s".</li>

896

<li>Always convert IEEE floating point NaN values into NULL during

897

processing. (<a href="http://www.sqlite.org/cvstrac/tktview?tn=3060">Ticket #3060</a>)</li>

898

<li>Make sure that when a connection blocks on a RESERVED lock that

899

it is able to continue after the lock is released. (<a href="http://www.sqlite.org/cvstrac/tktview?tn=3093">Ticket #3093</a>)</li>

900

<li>The "configure" scripts should now automatically configure Unix

901

systems for large file support. Improved error messages for

902

when large files are encountered and large file support is disabled.</li>

903

<li>Avoid cache pages leaks following disk-full or I/O errors</li>

904

<li>And, many more minor bug fixes and performance enhancements....</li>

905

</ul></p><a name="version_3_5_8"></a>

906

907

<li>Expose SQLite's internal pseudo-random number generator (PRNG)

908

via the <a href="c3ref/randomness.html">sqlite3_randomness()</a> interface</li>

909

<li>New interface <a href="c3ref/context_db_handle.html">sqlite3_context_db_handle()</a> that returns the

910

<a href="c3ref/sqlite3.html">database connection</a> handle that has invoked an application-defined

911

SQL function.</li>

912

<li>New interface <a href="c3ref/limit.html">sqlite3_limit()</a> allows size and length limits to be

913

set on a per-connection basis and at run-time.</li>

914

<li>Improved crash-robustness: write the database page size into the rollback

915

journal header.</li>

916

<li>Allow the <a href="lang_vacuum.html">VACUUM</a> command to change the page size of a database file.</li>

917

<li>The xAccess() method of the VFS is allowed to return -1 to signal

918

a memory allocation error.</li>

919

<li>Performance improvement: The OP_IdxDelete opcode uses unpacked records,

920

obviating the need for one OP_MakeRecord opcode call for each index

921

record deleted.</li>

922

<li>Performance improvement: Constant subexpressions are factored out of

923

loops.</li>

924

<li>Performance improvement: Results of OP_Column are reused rather than

925

issuing multiple OP_Column opcodes.</li>

926

<li>Fix a bug in the RTRIM collating sequence.</li>

927

<li>Fix a bug in the SQLITE_SECURE_DELETE option that was causing

928

Firefox crashes. Make arrangements to always test SQLITE_SECURE_DELETE

929

prior to each release.</li>

930

<li>Other miscellaneous performance enhancements.</li>

931

<li>Other miscellaneous minor bug fixes.</li>

932

</ul></p><a name="version_3_5_7"></a>

933

934

<li>Fix a bug (<a href="http://www.sqlite.org/cvstrac/tktview?tn=2927">ticket #2927</a>) in the register allocation for

935

compound selects - introduced by the new VM code in version 3.5.5.</li>

936

<li>ALTER TABLE uses double-quotes instead of single-quotes for quoting

937

filenames.</li>

938

<li>Use the WHERE clause to reduce the size of a materialized VIEW in

939

an UPDATE or DELETE statement. (Optimization)</li>

940

<li>Do not apply the flattening optimization if the outer query is an

941

aggregate and the inner query contains ORDER BY. (<a href="http://www.sqlite.org/cvstrac/tktview?tn=2943">Ticket #2943</a>)</li>

942

<li>Additional OS/2 updates</li>

943

<li>Added an experimental power-of-two, first-fit memory allocator.</li>

944

<li>Remove all instances of sprintf() from the code</li>

945

<li>Accept "Z" as the zulu timezone at the end of date strings</li>

946

<li>Fix a bug in the LIKE optimizer that occurs when the last character

947

before the first wildcard is an upper-case "Z"</li>

948

<li>Added the "bitvec" object for keeping track of which pages have

949

been journalled. Improves speed and reduces memory consumption, especially

950

for large database files.</li>

951

<li>Get the SQLITE_ENABLE_LOCKING_STYLE macro working again on Mac OS X.</li>

952

<li>Store the statement journal in the temporary file directory instead of

953

collocated with the database file.</li>

954

<li>Many improvements and cleanups to the configure script</li>

955

</ul></p><a name="version_3_5_6"></a>

956

957

<li>Fix a bug (<a href="http://www.sqlite.org/cvstrac/tktview?tn=2913">ticket #2913</a>)

958

that prevented virtual tables from working in a LEFT JOIN.

959

The problem was introduced into shortly before the 3.5.5 release.</li>

960

<li>Bring the OS/2 porting layer up-to-date.</li>

961

<li>Add the new <a href="c3ref/result_blob.html">sqlite3_result_error_code()</a> API and use it in the

962

implementation of <a href="lang_attach.html">ATTACH</a> so that proper error codes are returned

963

when an <a href="lang_attach.html">ATTACH</a> fails.</li>

964

</ul></p><a name="version_3_5_5"></a>

965

966

<li>Convert the underlying virtual machine to be a register-based machine

967

rather than a stack-based machine. The only user-visible change

968

is in the output of EXPLAIN.</li>

969

<li>Add the build-in RTRIM collating sequence.</li>

970

</ul></p><a name="version_3_5_4"></a>

971

972

<li>Fix a critical bug in UPDATE or DELETE that occurs when an

973

OR REPLACE clause or a trigger causes rows in the same table to

974

be deleted as side effects. (See <a href="http://www.sqlite.org/cvstrac/tktview?tn=2832">ticket #2832</a>.) The most likely

975

result of this bug is a segmentation fault, though database

976

corruption is a possibility.</li>

977

<li>Bring the processing of ORDER BY into compliance with the

978

SQL standard for case where a result alias and a table column name

979

are in conflict. Correct behavior is to prefer the result alias.

980

Older versions of SQLite incorrectly picked the table column.

981

(See <a href="http://www.sqlite.org/cvstrac/tktview?tn=2822">ticket #2822</a>.)</li>

982

<li>The <a href="lang_vacuum.html">VACUUM</a> command preserves

983

the setting of the

984

<a href="pragma.html#pragma_legacy_file_format">legacy_file_format pragma</a>.

985

(<a href="http://www.sqlite.org/cvstrac/tktview?tn=2804">Ticket #2804</a>.)</li>

986

<li>Productize and officially support the group_concat() SQL function.</li>

987

<li>Better optimization of some IN operator expressions.</li>

988

<li>Add the ability to change the

989

<a href="pragma.html#pragma_auto_vacuum">auto_vacuum</a> status of a

990

database by setting the auto_vaccum pragma and VACUUMing the database.</li>

991

<li>Prefix search in FTS3 is much more efficient.</li>

992

<li>Relax the SQL statement length restriction in the CLI so that

993

the ".dump" output of databases with very large BLOBs and strings can

994

be played back to recreate the database.</li>

995

<li>Other small bug fixes and optimizations.</li>

996

</ul></p><a name="version_3_5_3"></a>

997

998

<li>Move website and documentation files out of the source tree into

999

a <a href="http://www.sqlite.org/docsrc/">separate CM system</a>.

1000

<li>Fix a long-standing bug in INSERT INTO ... SELECT ... statements

1001

where the SELECT is compound.

1002

<li>Fix a long-standing bug in RAISE(IGNORE) as used in BEFORE triggers.

1003

<li>Fixed the operator precedence for the ~ operator.

1004

<li>On Win32, do not return an error when attempting to delete a file

1005

that does not exist.

1006

<li>Allow collating sequence names to be quoted.

1007

<li>Modify the TCL interface to use <a href="c3ref/prepare.html">sqlite3_prepare_v2()</a>.

1008

<li>Fix multiple bugs that can occur following a malloc() failure.

1009

<li><a href="c3ref/step.html">sqlite3_step()</a> returns <a href="c3ref/c_abort.html">SQLITE_MISUSE</a> instead of crashing when

1010

called with a NULL parameter.

1011

<li>FTS3 now uses the SQLite memory allocator exclusively. The

1012

FTS3 amalgamation can now be appended to the SQLite amalgamation to

1013

generate a super-amalgamation containing both.

1014

<li>The DISTINCT keyword now will sometimes use an INDEX if an

1015

appropriate index is available and the optimizer thinks its use

1016

might be advantageous.

1017

</ul></p><a name="version_3_5_2"></a>

1018

1019

<li>Dropped support for the <a href="compile.html#omitfeatures">SQLITE_OMIT_MEMORY_ALLOCATION</a> compile-time

1020

option.

1021

<li>Always open files using FILE_FLAG_RANDOM_ACCESS under Windows.

1022

<li>The 3rd parameter of the built-in SUBSTR() function is now optional.

1023

<li>Bug fix: do not invoke the authorizer when reparsing the schema after

1024

a schema change.

1025

<li>Added the experimental malloc-free memory allocator in mem3.c.

1026

<li>Virtual machine stores 64-bit integer and floating point constants

1027

in binary instead of text for a performance boost.

1028

<li>Fix a race condition in test_async.c.

1029

<li>Added the ".timer" command to the CLI

1030

</ul></p><a name="version_3_5_1"></a>

1031

1032

<li><i><b>Nota Bene:</b> We are not using terms "alpha" or "beta" on this

1033

release because the code is stable and because if we use those terms,

1034

nobody will upgrade. However, we still reserve the right to make

1035

incompatible changes to the new VFS interface in future releases.</i></li>

1036

1037

<li>Fix a bug in the handling of <a href="c3ref/c_abort.html">SQLITE_FULL</a> errors that could lead

1038

to database corruption. <a href="http://www.sqlite.org/cvstrac/tktview?tn=2686">Ticket #2686</a>.

1039

<li>The test_async.c drive now does full file locking and works correctly

1040

when used simultaneously by multiple processes on the same database.

1041

<li>The CLI ignores whitespace (including comments) at the end of lines

1042

<li>Make sure the query optimizer checks dependencies on all terms of

1043

a compound SELECT statement. <a href="http://www.sqlite.org/cvstrac/tktview?tn=2640">Ticket #2640</a>.

1044

<li>Add demonstration code showing how to build a VFS for a raw

1045

mass storage without a filesystem.

1046

<li>Added an output buffer size parameter to the xGetTempname() method

1047

of the VFS layer.

1048

<li>Sticky <a href="c3ref/c_abort.html">SQLITE_FULL</a> or <a href="c3ref/c_abort.html">SQLITE_IOERR</a> errors in the pager are reset

1049

when a new transaction is started.

1050

</ul></p><a name="version_3_5_0"></a>

1051

<h3>2007 Sep 04 (3.5.0) alpha</h3><p><ul>

1052

<li>Redesign the OS interface layer. See

1053

<a href="34to35.html">34to35.html</a> for details.

1054

<font color="red">*** Potentially incompatible change ***</font>

1055

<li>The <a href="c3ref/release_memory.html">sqlite3_release_memory()</a>, <a href="c3ref/soft_heap_limit.html">sqlite3_soft_heap_limit()</a>,

1056

and <a href="c3ref/enable_shared_cache.html">sqlite3_enable_shared_cache()</a> interfaces now work cross all

1057

threads in the process, not just the single thread in which they

1058

are invoked.

1059

<font color="red">*** Potentially incompatible change ***</font>

1060

<li>Added the <a href="c3ref/open.html">sqlite3_open_v2()</a> interface.

1061

<li>Reimplemented the memory allocation subsystem and made it

1062

replaceable at compile-time.

1063

<li>Created a new mutex subsystem and made it replicable at

1064

compile-time.

1065

<li>The same database connection may now be used simultaneously by

1066

separate threads.

1067

</ul></p><a name="version_3_4_2"></a>

1068

<h3>2007 August 13 (3.4.2)</h3><p><ul>

1069

<li>Fix a database corruption bug that might occur if a ROLLBACK command

1070

is executed in <a href="pragma.html#pragma_auto_vacuum">auto-vacuum mode</a>

1071

and a very small <a href="c3ref/soft_heap_limit.html">sqlite3_soft_heap_limit</a> is set.

1072

<a href="http://www.sqlite.org/cvstrac/tktview?tn=2565">Ticket #2565</a>.

1073

1074

<li>Add the ability to run a full regression test with a small

1075

<a href="c3ref/soft_heap_limit.html">sqlite3_soft_heap_limit</a>.

1076

1077

<li>Fix other minor problems with using small soft heap limits.

1078

1079

<li>Work-around for

1080

<a href="http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32575">GCC bug 32575</a>.

1081

1082

<li>Improved error detection of misused aggregate functions.

1083

1084

<li>Improvements to the amalgamation generator script so that all symbols

1085

are prefixed with either SQLITE_PRIVATE or SQLITE_API.

1086

</ul></p><a name="version_3_4_1"></a>

1087

1088

<li>Fix a bug in <a href="lang_vacuum.html">VACUUM</a> that can lead to

1089

1090

database corruption</a> if two

1091

processes are connected to the database at the same time and one

1092

VACUUMs then the other then modifies the database.</li>

1093

<li>The expression "+column" is now considered the same as "column"

1094

when computing the collating sequence to use on the expression.</li>

1095

<li>In the <a href="tclsqlite.html">TCL language interface</a>,

1096

"@variable" instead of "$variable" always binds as a blob.</li>

1097

<li>Added <a href="pragma.html#pragma_freelist_count">PRAGMA freelist_count</a>

1098

for determining the current size of the freelist.</li>

1099

1100

PRAGMA auto_vacuum=incremental</a> setting is now persistent.</li>

1101

<li>Add FD_CLOEXEC to all open files under Unix.</li>

1102

1103

min()/max() optimization</a> when applied to

1104

descending indices.</li>

1105

<li>Make sure the TCL language interface works correctly with 64-bit

1106

integers on 64-bit machines.</li>

1107

<li>Allow the value -9223372036854775808 as an integer literal in SQL

1108

statements.</li>

1109

<li>Add the capability of "hidden" columns in virtual tables.</li>

1110

<li>Use the macro SQLITE_PRIVATE (defaulting to "static") on all

1111

internal functions in the amalgamation.</li>

1112

<li>Add pluggable tokenizers and <a href="http://www.icu-project.org/">ICU</a>

1113

tokenization support to FTS2</li>

1114

<li>Other minor bug fixes and documentation enhancements</li>

1115

</ul></p><a name="version_3_4_0"></a>

1116

1117

<li>Fix a bug that can lead to database corruption if an <a href="c3ref/c_abort.html">SQLITE_BUSY</a> error

1118

occurs in the middle of an explicit transaction and that transaction

1119

is later committed. <a href="http://www.sqlite.org/cvstrac/tktview?tn=2409">Ticket #2409</a>.

1120

See the

1121

1122

CorruptionFollowingBusyError</a> wiki page for details.</i>

1123

<li>Fix a bug that can lead to database corruption if autovacuum mode is

1124

on and a malloc() failure follows a CREATE TABLE or CREATE INDEX statement

1125

which itself follows a cache overflow inside a transaction. See

1126

<a href="http://www.sqlite.org/cvstrac/tktview?tn=2418">ticket #2418</a>.

1127

</li>

1128

<li>Added explicit <a href="limits.html">upper bounds</a> on the sizes and

1129

quantities of things SQLite can process. This change might cause

1130

compatibility problems for

1131

applications that use SQLite in the extreme, which is why the current

1132

release is 3.4.0 instead of 3.3.18.</li>

1133

<li>Added support for <a href="c3ref/blob_open.html">Incremental BLOB I/O</a>.</li>

1134

<li>Added the <a href="c3ref/bind_blob.html">sqlite3_bind_zeroblob()</a> API</a>

1135

and the <a href="lang_expr.html#zeroblob">zeroblob()</a> SQL function.</li>

1136

<li>Added support for <a href="pragma.html#pragma_incremental_vacuum">

1137

Incremental Vacuum</a>.</li>

1138

<li>Added the SQLITE_MIXED_ENDIAN_64BIT_FLOAT compile-time option to support

1139

ARM7 processors with goofy endianness.</li>

1140

<li>Removed all instances of sprintf() and strcpy() from the core library.</li>

1141

<li>Added support for

1142

<a href="http://www.icu-project.org/">International Components for Unicode (ICU)</a>

1143

to the full-text search extensions.

1144

</ul><p>

1145

1146

<li>In the Windows OS driver, reacquire a SHARED lock if an attempt to

1147

acquire an EXCLUSIVE lock fails. <a href="http://www.sqlite.org/cvstrac/tktview?tn=2354">Ticket #2354</a></li>

1148

<li>Fix the REPLACE() function so that it returns NULL if the second argument

1149

is an empty string. <a href="http://www.sqlite.org/cvstrac/tktview?tn=2324">Ticket #2324</a>.</li>

1150

<li>Document the hazards of type conversions in

1151

<a href="c3ref/column_blob.html">sqlite3_column_blob()</a>

1152

and related APIs. Fix unnecessary type conversions. <a href="http://www.sqlite.org/cvstrac/tktview?tn=2321">Ticket #2321</a>.</li>

1153

<li>Internationalization of the TRIM() function. <a href="http://www.sqlite.org/cvstrac/tktview?tn=2323">Ticket #2323</a></li>

1154

<li>Use memmove() instead of memcpy() when moving between memory regions

1155

that might overlap. <a href="http://www.sqlite.org/cvstrac/tktview?tn=2334">Ticket #2334</a></li>

1156

<li>Fix an optimizer bug involving subqueries in a compound SELECT that has

1157

both an ORDER BY and a LIMIT clause. <a href="http://www.sqlite.org/cvstrac/tktview?tn=2339">Ticket #2339</a>.</li>

1158

<li>Make sure the <a href="c3ref/mprintf.html">sqlite3_snprintf()</a>

1159

interface does not zero-terminate the buffer if the buffer size is

1160

less than 1. <a href="http://www.sqlite.org/cvstrac/tktview?tn=2341">Ticket #2341</a></li>

1161

<li>Fix the built-in printf logic so that it prints "NaN" not "Inf" for

1162

floating-point NaNs. <a href="http://www.sqlite.org/cvstrac/tktview?tn=2345">Ticket #2345</a></li>

1163

<li>When converting BLOB to TEXT, use the text encoding of the main database.

1164

<a href="http://www.sqlite.org/cvstrac/tktview?tn=2349">Ticket #2349</a></li>

1165

<li>Keep the full precision of integers (if possible) when casting to

1166

NUMERIC. <a href="http://www.sqlite.org/cvstrac/tktview?tn=2364">Ticket #2364</a></li>

1167

<li>Fix a bug in the handling of UTF16 codepoint 0xE000</li>

1168

<li>Consider explicit collate clauses when matching WHERE constraints

1169

to indices in the query optimizer. <a href="http://www.sqlite.org/cvstrac/tktview?tn=2391">Ticket #2391</a></li>

1170

<li>Fix the query optimizer to correctly handle constant expressions in

1171

the ON clause of a LEFT JOIN. <a href="http://www.sqlite.org/cvstrac/tktview?tn=2403">Ticket #2403</a></li>

1172

<li>Fix the query optimizer to handle rowid comparisons to NULL

1173

correctly. <a href="http://www.sqlite.org/cvstrac/tktview?tn=2404">Ticket #2404</a></li>

1174

<li>Fix many potential segfaults that could be caused by malicious SQL

1175

statements.</li>

1176

</ul></p><a name="version_3_3_17"></a>

1177

<h3>2007 April 25 (3.3.17)</h3><p><ul>

1178

<li>When the "write_version" value of the database header is larger than

1179

what the library understands, make the database read-only instead of

1180

unreadable.</li>

1181

<li>Other minor bug fixes</li>

1182

</ul></p><a name="version_3_3_16"></a>

1183

<h3>2007 April 18 (3.3.16)</h3><p><ul>

1184

<li>Fix a bug that caused VACUUM to fail if NULLs appeared in a

1185

UNIQUE column.</li>

1186

<li>Reinstate performance improvements that were added in

1187

<a href="#version_3_3_14">Version 3.3.14</a>

1188

but regressed in <a href="#version_3_3_15">Version 3.3.15</a>.</li>

1189

<li>Fix problems with the handling of ORDER BY expressions on

1190

compound SELECT statements in subqueries.</li>

1191

<li>Fix a potential segfault when destroying locks on WinCE in

1192

a multi-threaded environment.</li>

1193

<li>Documentation updates.</li>

1194

</ul></p><a name="version_3_3_15"></a>

1195

<h3>2007 April 9 (3.3.15)</h3><p><ul>

1196

<li>Fix a bug introduced in 3.3.14 that caused a rollback of

1197

CREATE TEMP TABLE to leave the database connection wedged.</li>

1198

<li>Fix a bug that caused an extra NULL row to be returned when

1199

a descending query was interrupted by a change to the database.</li>

1200

<li>The FOR EACH STATEMENT clause on a trigger now causes a syntax

1201

error. It used to be silently ignored.</li>

1202

<li>Fix an obscure and relatively harmless problem that might have caused

1203

a resource leak following an I/O error.</li>

1204

<li>Many improvements to the test suite. Test coverage now exceeded 98%</li>

1205

</ul></p><a name="version_3_3_14"></a>

1206

<h3>2007 April 2 (3.3.14)</h3><p><ul>

1207

<li>Fix a bug (<a href="http://www.sqlite.org/cvstrac/tktview?tn=2273">ticket #2273</a>)

1208

that could cause a segfault when the IN operator

1209

is used one one term of a two-column index and the right-hand side of

1210

the IN operator contains a NULL.</li>

1211

<li>Added a new OS interface method for determining the sector size

1212

of underlying media: sqlite3OsSectorSize().</li>

1213

<li>A new algorithm for statements of the form

1214

INSERT INTO <i>table1</i> SELECT * FROM <i>table2</i>

1215

is faster and reduces fragmentation. VACUUM uses statements of

1216

this form and thus runs faster and defragments better.</li>

1217

<li>Performance enhancements through reductions in disk I/O:

1218

<ul>

1219

<li>Do not read the last page of an overflow chain when

1220

deleting the row - just add that page to the freelist.</li>

1221

<li>Do not store pages being deleted in the

1222

rollback journal.</li>

1223

<li>Do not read in the (meaningless) content of

1224

pages extracted from the freelist.</li>

1225

<li>Do not flush the page cache (and thus avoiding

1226

a cache refill) unless another process changes the underlying

1227

database file.</li>

1228

<li>Truncate rather than delete the rollback journal when committing

1229

a transaction in exclusive access mode, or when committing the TEMP

1230

database.</li>

1231

</ul></li>

1232

<li>Added support for exclusive access mode using

1233

1234

"PRAGMA locking_mode=EXCLUSIVE"</a></li>

1235

<li>Use heap space instead of stack space for large buffers in the

1236

pager - useful on embedded platforms with stack-space

1237

limitations.</li>

1238

<li>Add a makefile target "sqlite3.c" that builds an amalgamation containing

1239

the core SQLite library C code in a single file.</li>

1240

<li>Get the library working correctly when compiled

1241

with GCC option "-fstrict-aliasing".</li>

1242

<li>Removed the vestigal SQLITE_PROTOCOL error.</li>

1243

<li>Improvements to test coverage, other minor bugs fixed,

1244

memory leaks plugged,

1245

code refactored and/or recommended in places for easier reading.</li>

1246

</ul></p><a name="version_3_3_13"></a>

1247

<h3>2007 February 13 (3.3.13)</h3><p><ul>

1248

<li>Add a "fragmentation" measurement in the output of sqlite3_analyzer.</li>

1249

<li>Add the COLLATE operator used to explicitly set the collating sequence

1250

used by an expression. This feature is considered experimental pending

1251

additional testing.</li>

1252

<li>Allow up to 64 tables in a join - the old limit was 32.</li>

1253

<li>Added two new experimental functions:

1254

<a href="lang_expr.html#randomblobFunc">randomBlob()</a> and

1255

<a href="lang_expr.html#hexFunc">hex()</a>.

1256

Their intended use is to facilitate generating

1257

<a href="http://en.wikipedia.org/wiki/UUID">UUIDs</a>.

1258

</li>

1259

<li>Fix a problem where

1260

<a href="pragma.html#pragma_count_changes">PRAGMA count_changes</a> was

1261

causing incorrect results for updates on tables with triggers</li>

1262

<li>Fix a bug in the ORDER BY clause optimizer for joins where the

1263

left-most table in the join is constrained by a UNIQUE index.</li>

1264

<li>Fixed a bug in the "copy" method of the TCL interface.</li>

1265

<li>Bug fixes in fts1 and fts2 modules.</li>

1266

</ul></p><a name="version_3_3_12"></a>

1267

<h3>2007 January 27 (3.3.12)</h3><p><ul>

1268

<li>Fix another bug in the IS NULL optimization that was added in

1269

version 3.3.9.</li>

1270

<li>Fix an assertion fault that occurred on deeply nested views.</li>

1271

<li>Limit the amount of output that

1272

<a href="pragma.html#pragma_integrity_check">PRAGMA integrity_check</a>

1273

generates.</li>

1274

<li>Minor syntactic changes to support a wider variety of compilers.</li>

1275

</ul></p><a name="version_3_3_11"></a>

1276

<h3>2007 January 22 (3.3.11)</h3><p><ul>

1277

<li>Fix another bug in the implementation of the new

1278

<a href="c3ref/prepare.html">sqlite3_prepare_v2()</a> API.

1279

We'll get it right eventually...</li>

1280

<li>Fix a bug in the IS NULL optimization that was added in version 3.3.9 -

1281

the bug was causing incorrect results on certain LEFT JOINs that included

1282

in the WHERE clause an IS NULL constraint for the right table of the

1283

LEFT JOIN.</li>

1284

<li>Make AreFileApisANSI() a no-op macro in WinCE since WinCE does not

1285

support this function.</li>

1286

</ul></p><a name="version_3_3_10"></a>

1287

<h3>2007 January 9 (3.3.10)</h3><p><ul>

1288

<li>Fix bugs in the implementation of the new

1289

<a href="c3ref/prepare.html">sqlite3_prepare_v2()</a> API

1290

that can lead to segfaults.</li>

1291

<li>Fix 1-second round-off errors in the

1292

1293

strftime()</a> function</li>

1294

<li>Enhance the Windows OS layer to provide detailed error codes</li>

1295

<li>Work around a win2k problem so that SQLite can use single-character

1296

database file names</li>

1297

<li>The

1298

<a href="pragma.html#pragma_user_version">user_version</a> and

1299

<a href="pragma.html#pragma_schema_version">schema_version</a> pragmas

1300

correctly set their column names in the result set</li>

1301

<li>Documentation updates</li>

1302

</ul></p><a name="version_3_3_9"></a>

1303

<h3>2007 January 4 (3.3.9)</h3><p><ul>

1304

<li>Fix bugs in pager.c that could lead to database corruption if two

1305

processes both try to recover a hot journal at the same instant</li>

1306

<li>Added the <a href="c3ref/prepare.html">sqlite3_prepare_v2()</a>

1307

API.</li>

1308

<li>Fixed the ".dump" command in the command-line shell to show

1309

indices, triggers and views again.</li>

1310

<li>Change the table_info pragma so that it returns NULL for the default

1311

value if there is no default value</li>

1312

<li>Support for non-ASCII characters in win95 filenames</li>

1313

<li>Query optimizer enhancements:

1314

<ul>

1315

<li>Optimizer does a better job of using indices to satisfy ORDER BY

1316

clauses that sort on the integer primary key</li>

1317

<li>Use an index to satisfy an IS NULL operator in the WHERE clause</li>

1318

<li>Fix a bug that was causing the optimizer to miss an OR optimization

1319

opportunity</li>

1320

<li>The optimizer has more freedom to reorder tables in the FROM clause

1321

even in there are LEFT joins.</li>

1322

</ul>

1323

<li>Extension loading supported added to WinCE</li>

1324

<li>Allow constraint names on the DEFAULT clause in a table definition</li>

1325

<li>Added the ".bail" command to the command-line shell</li>

1326

<li>Make CSV (comma separate value) output from the command-line shell

1327

more closely aligned to accepted practice</li>

1328

<li>Experimental FTS2 module added</li>

1329

<li>Use sqlite3_mprintf() instead of strdup() to avoid libc dependencies</li>

1330

<li>VACUUM uses a temporary file in the official TEMP folder, not in the

1331

same directory as the original database</li>

1332

<li>The prefix on temporary filenames on Windows is changed from "sqlite"

1333

to "etilqs".</li>

1334

</ul></p><a name="version_3_3_8"></a>

1335

<h3>2006 October 9 (3.3.8)</h3><p><ul>

1336

<li>Support for full text search using the

1337

<a href="http://www.sqlite.org/cvstrac/wiki?p=FullTextIndex">FTS1 module</a>

1338

(beta)</li>

1339

<li>Added Mac OS X locking patches (beta - disabled by default)</li>

1340

<li>Introduce extended error codes and add error codes for various

1341

kinds of I/O errors.</li>

1342

<li>Added support for IF EXISTS on CREATE/DROP TRIGGER/VIEW</li>

1343

<li>Fix the regression test suite so that it works with Tcl8.5</li>

1344

<li>Enhance sqlite3_set_authorizer() to provide notification of calls to

1345

SQL functions.</li>

1346

<li>Added experimental API: sqlite3_auto_extension()</li>

1347

<li>Various minor bug fixes</li>

1348

</ul></p><a name="version_3_3_7"></a>

1349

<h3>2006 August 12 (3.3.7)</h3><p><ul>

1350

<li>Added support for

1351

<a href="http://www.sqlite.org/cvstrac/wiki?p=VirtualTables">virtual tables</a>

1352

(beta)</li>

1353

<li>Added support for

1354

1355

dynamically loaded extensions</a> (beta)</li>

1356

<li>The

1357

<a href="c3ref/interrupt.html">sqlite3_interrupt()</a>

1358

routine can be called for a different thread</li>

1359

<li>Added the <a href="lang_expr.html#match">MATCH</a> operator.</li>

1360

<li>The default file format is now 1.

1361

</ul></p><a name="version_3_3_6"></a>

1362

1363

<li>Plays better with virus scanners on Windows</li>

1364

<li>Faster :memory: databases</li>

1365

<li>Fix an obscure segfault in UTF-8 to UTF-16 conversions</li>

1366

<li>Added driver for OS/2</li>

1367

<li>Correct column meta-information returned for aggregate queries</li>

1368

<li>Enhanced output from EXPLAIN QUERY PLAN</li>

1369

<li>LIMIT 0 now works on subqueries</li>

1370

<li>Bug fixes and performance enhancements in the query optimizer</li>

1371

<li>Correctly handle NULL filenames in ATTACH and DETACH</li>

1372

<li>Improved syntax error messages in the parser</li>

1373

<li>Fix type coercion rules for the IN operator</li>

1374

</ul></p><a name="version_3_3_5"></a>

1375

<h3>2006 April 5 (3.3.5)</h3><p><ul>

1376

<li>CHECK constraints use conflict resolution algorithms correctly.</li>

1377

<li>The SUM() function throws an error on integer overflow.</li>

1378

<li>Choose the column names in a compound query from the left-most SELECT

1379

instead of the right-most.</li>

1380

<li>The sqlite3_create_collation() function

1381

honors the SQLITE_UTF16_ALIGNED flag.</li>

1382

<li>SQLITE_SECURE_DELETE compile-time option causes deletes to overwrite

1383

old data with zeros.</li>

1384

<li>Detect integer overflow in abs().</li>

1385

<li>The random() function provides 64 bits of randomness instead of

1386

only 32 bits.</li>

1387

<li>Parser detects and reports automaton stack overflow.</li>

1388

<li>Change the round() function to return REAL instead of TEXT.</li>

1389

<li>Allow WHERE clause terms on the left table of a LEFT OUTER JOIN to

1390

contain aggregate subqueries.</li>

1391

<li>Skip over leading spaces in text to numeric conversions.</li>

1392

<li>Various minor bug and documentation typo fixes and

1393

performance enhancements.</li>

1394

</ul></p><a name="version_3_3_4"></a>

1395

<h3>2006 February 11 (3.3.4)</h3><p><ul>

1396

<li>Fix a blunder in the Unix mutex implementation that can lead to

1397

deadlock on multithreaded systems.</li>

1398

<li>Fix an alignment problem on 64-bit machines</li>

1399

<li>Added the fullfsync pragma.</li>

1400

<li>Fix an optimizer bug that could have caused some unusual LEFT OUTER JOINs

1401

to give incorrect results.</li>

1402

<li>The SUM function detects integer overflow and converts to accumulating

1403

an approximate result using floating point numbers</li>

1404

<li>Host parameter names can begin with '@' for compatibility with SQL Server.

1405

</li>

1406

<li>Other miscellaneous bug fixes</li>

1407

</ul></p><a name="version_3_3_3"></a>

1408

<h3>2006 January 31 (3.3.3)</h3><p><ul>

1409

<li>Removed support for an ON CONFLICT clause on CREATE INDEX - it never

1410

worked correctly so this should not present any backward compatibility

1411

problems.</li>

1412

<li>Authorizer callback now notified of ALTER TABLE ADD COLUMN commands</li>

1413

<li>After any changes to the TEMP database schema, all prepared statements

1414

are invalidated and must be recreated using a new call to

1415

sqlite3_prepare()</li>

1416

<li>Other minor bug fixes in preparation for the first stable release

1417

of version 3.3</li>

1418

</ul></p><h3>2006 January 24 (3.3.2 beta)</h3><p><ul>

1419

<li>Bug fixes and speed improvements. Improved test coverage.</li>

1420

<li>Changes to the OS-layer interface: mutexes must now be recursive.</li>

1421

<li>Discontinue the use of thread-specific data for out-of-memory

1422

exception handling</li>

1423

</ul></p><h3>2006 January 16 (3.3.1 alpha)</h3><p><ul>

1424

<li>Countless bug fixes</li>

1425

<li>Speed improvements</li>

1426

<li>Database connections can now be used by multiple threads, not just

1427

the thread in which they were created.</li>

1428

</ul></p><h3>2006 January 10 (3.3.0 alpha)</h3><p><ul>

1429

<li>CHECK constraints</li>

1430

<li>IF EXISTS and IF NOT EXISTS clauses on CREATE/DROP TABLE/INDEX.</li>

1431

<li>DESC indices</li>

1432

<li>More efficient encoding of boolean values resulting in smaller database

1433

files</li>

1434

<li>More aggressive <a href="compile.html#omit_floating_point">SQLITE_OMIT_FLOATING_POINT</a></li>

1435

<li>Separate INTEGER and REAL affinity</li>

1436

<li>Added a virtual function layer for the OS interface</li>

1437

<li>"exists" method added to the TCL interface</li>

1438

<li>Improved response to out-of-memory errors</li>

1439

<li>Database cache can be optionally shared between connections

1440

in the same thread</li>

1441

<li>Optional READ UNCOMMITTED isolation (instead of the default

1442

isolation level of SERIALIZABLE) and table level locking when

1443

database connections share a common cache.</li>

1444

</ul></p><a name="version_3_2_8"></a>

1445

<h3>2005 December 19 (3.2.8)</h3><p><ul>

1446

<li>Fix an obscure bug that can cause database corruption under the

1447

following unusual circumstances: A large INSERT or UPDATE statement which

1448

is part of an even larger transaction fails due to a uniqueness constraint

1449

but the containing transaction commits.</li>

1450

</ul></p><a name="version_2_8_17"></a>

1451

<h3>2005 December 19 (2.8.17)</h3><p><ul>

1452

<li>Fix an obscure bug that can cause database corruption under the

1453

following unusual circumstances: A large INSERT or UPDATE statement which

1454

is part of an even larger transaction fails due to a uniqueness contraint

1455

but the containing transaction commits.</li>

1456

</ul></p><a name="version_3_2_7"></a>

1457

<h3>2005 September 24 (3.2.7)</h3><p><ul>

1458

<li>GROUP BY now considers NULLs to be equal again, as it should

1459

</li>

1460

<li>Now compiles on Solaris and OpenBSD and other Unix variants

1461

that lack the fdatasync() function</li>

1462

<li>Now compiles on MSVC++6 again</li>

1463

<li>Fix uninitialized variables causing malfunctions for various obscure

1464

queries</li>

1465

<li>Correctly compute a LEFT OUTER JOINs that is constrained on the

1466

left table only</li>

1467

</ul></p><a name="version_3_2_6"></a>

1468

<h3>2005 September 17 (3.2.6)</h3><p><ul>

1469

<li>Fix a bug that can cause database corruption if a VACUUM (or

1470

autovacuum) fails and is rolled back on a database that is

1471

larger than 1GiB</li>

1472

<li>LIKE optimization now works for columns with COLLATE NOCASE</li>

1473

<li>ORDER BY and GROUP BY now use bounded memory</li>

1474

<li>Added support for COUNT(DISTINCT expr)</li>

1475

<li>Change the way SUM() handles NULL values in order to comply with

1476

the SQL standard</li>

1477

<li>Use fdatasync() instead of fsync() where possible in order to speed

1478

up commits slightly</li>

1479

<li>Use of the CROSS keyword in a join turns off the table reordering

1480

optimization</li>

1481

<li>Added the experimental and undocumented EXPLAIN QUERY PLAN capability</li>

1482

<li>Use the unicode API in Windows</li>

1483

</ul></p><a name="version_3_2_5"></a>

1484

<h3>2005 August 27 (3.2.5)</h3><p><ul>

1485

<li>Fix a bug effecting DELETE and UPDATE statements that changed

1486

more than 40960 rows.</li>

1487

<li>Change the makefile so that it no longer requires GNUmake extensions</li>

1488

<li>Fix the --enable-threadsafe option on the configure script</li>

1489

<li>Fix a code generator bug that occurs when the left-hand side of an IN

1490

operator is constant and the right-hand side is a SELECT statement</li>

1491

<li>The PRAGMA synchronous=off statement now disables syncing of the

1492

master journal file in addition to the normal rollback journals</li>

1493

</ul></p><a name="version_3_2_4"></a>

1494

<h3>2005 August 24 (3.2.4)</h3><p><ul>

1495

<li>Fix a bug introduced in the previous release

1496

that can cause a segfault while generating code

1497

for complex WHERE clauses.</li>

1498

<li>Allow floating point literals to begin or end with a decimal point.</li>

1499

</ul></p><a name="version_3_2_3"></a>

1500

<h3>2005 August 21 (3.2.3)</h3><p><ul>

1501

<li>Added support for the CAST operator</li>

1502

<li>Tcl interface allows BLOB values to be transferred to user-defined

1503

functions</li>

1504

<li>Added the "transaction" method to the Tcl interface</li>

1505

<li>Allow the DEFAULT value of a column to call functions that have constant

1506

operands</li>

1507

<li>Added the ANALYZE command for gathering statistics on indices and

1508

using those statistics when picking an index in the optimizer</li>

1509

<li>Remove the limit (formerly 100) on the number of terms in the

1510

WHERE clause</li>

1511

<li>The right-hand side of the IN operator can now be a list of expressions

1512

instead of just a list of constants</li>

1513

<li>Rework the optimizer so that it is able to make better use of indices</li>

1514

<li>The order of tables in a join is adjusted automatically to make

1515

better use of indices</li>

1516

<li>The IN operator is now a candidate for optimization even if the left-hand

1517

side is not the left-most term of the index. Multiple IN operators can be

1518

used with the same index.</li>

1519

<li>WHERE clause expressions using BETWEEN and OR are now candidates

1520

for optimization</li>

1521

<li>Added the "case_sensitive_like" pragma and the SQLITE_CASE_SENSITIVE_LIKE

1522

compile-time option to set its default value to "on".</li>

1523

<li>Use indices to help with GLOB expressions and LIKE expressions too

1524

when the case_sensitive_like pragma is enabled</li>

1525

<li>Added support for grave-accent quoting for compatibility with MySQL</li>

1526

<li>Improved test coverage</li>

1527

<li>Dozens of minor bug fixes</li>

1528

</ul></p><a name="version_3_2_2"></a>

1529

1530

<li>Added the sqlite3_db_handle() API</li>

1531

<li>Added the sqlite3_get_autocommit() API</li>

1532

<li>Added a REGEXP operator to the parser. There is no function to back

1533

up this operator in the standard build but users can add their own using

1534

sqlite3_create_function()</li>

1535

<li>Speed improvements and library footprint reductions.</li>

1536

<li>Fix byte alignment problems on 64-bit architectures.</li>

1537

<li>Many, many minor bug fixes and documentation updates.</li>

1538

</ul></p><a name="version_3_2_1"></a>

1539

<h3>2005 March 29 (3.2.1)</h3><p><ul>

1540

<li>Fix a memory allocation error in the new ADD COLUMN comment.</li>

1541

<li>Documentation updates</li>

1542

</ul></p><a name="version_3_2_0"></a>

1543

<h3>2005 March 21 (3.2.0)</h3><p><ul>

1544

<li>Added support for ALTER TABLE ADD COLUMN.</li>

1545

<li>Added support for the "T" separator in ISO-8601 date/time strings.</li>

1546

<li>Improved support for Cygwin.</li>

1547

<li>Numerous bug fixes and documentation updates.</li>

1548

</ul></p><a name="version_3_1_6"></a>

1549

<h3>2005 March 16 (3.1.6)</h3><p><ul>

1550

<li>Fix a bug that could cause database corruption when inserting

1551

record into tables with around 125 columns.</li>

1552

<li>sqlite3_step() is now much more likely to invoke the busy handler

1553

and less likely to return SQLITE_BUSY.</li>

1554

<li>Fix memory leaks that used to occur after a malloc() failure.</li>

1555

</ul></p><a name="version_3_1_5"></a>

1556

<h3>2005 March 11 (3.1.5)</h3><p><ul>

1557

<li>The ioctl on Mac OS X to control syncing to disk is F_FULLFSYNC,

1558

not F_FULLSYNC. The previous release had it wrong.</li>

1559

</ul></p><a name="version_3_1_4"></a>

1560

<h3>2005 March 10 (3.1.4)</h3><p><ul>

1561

<li>Fix a bug in autovacuum that could cause database corruption if

1562

a CREATE UNIQUE INDEX fails because of a constraint violation.

1563

This problem only occurs if the new autovacuum feature introduced in

1564

version 3.1 is turned on.</li>

1565

<li>The F_FULLSYNC ioctl (currently only supported on Mac OS X) is disabled

1566

if the synchronous pragma is set to something other than "full".</li>

1567

<li>Add additional forward compatibility to the future version 3.2 database

1568

file format.</li>

1569

<li>Fix a bug in WHERE clauses of the form (rowid<'2')</li>

1570

<li>New <a href="compile.html#omitfeatures">SQLITE_OMIT_...</a> compile-time options added</li>

1571

<li>Updates to the man page</li>

1572

<li>Remove the use of strcasecmp() from the shell</li>

1573

<li>Windows DLL exports symbols Tclsqlite_Init and Sqlite_Init</li>

1574

</ul></p><a name="version_3_1_3"></a>

1575

<h3>2005 February 19 (3.1.3)</h3><p><ul>

1576

<li>Fix a problem with VACUUM on databases from which tables containing

1577

AUTOINCREMENT have been dropped.</li>

1578

<li>Add forward compatibility to the future version 3.2 database file

1579

format.</li>

1580

<li>Documentation updates</li>

1581

</ul></p><a name="version_3_1_2"></a>

1582

<h3>2005 February 15 (3.1.2)</h3><p><ul>

1583

<li>Fix a bug that can lead to database corruption if there are two

1584

open connections to the same database and one connection does a VACUUM

1585

and the second makes some change to the database.</li>

1586

<li>Allow "?" parameters in the LIMIT clause.</li>

1587

<li>Fix VACUUM so that it works with AUTOINCREMENT.</li>

1588

<li>Fix a race condition in AUTOVACUUM that can lead to corrupt databases</li>

1589

<li>Add a numeric version number to the sqlite3.h include file.</li>

1590

<li>Other minor bug fixes and performance enhancements.</li>

1591

</ul></p><a name="version_2_8_16"></a>

1592

<h3>2005 February 15 (2.8.16)</h3><p><ul>

1593

<li>Fix a bug that can lead to database corruption if there are two

1594

open connections to the same database and one connection does a VACUUM

1595

and the second makes some change to the database.</li>

1596

<li>Correctly handle quoted names in CREATE INDEX statements.</li>

1597

<li>Fix a naming conflict between sqlite.h and sqlite3.h.</li>

1598

<li>Avoid excess heap usage when copying expressions.</li>

1599

<li>Other minor bug fixes.</li>

1600

</ul></p><h3>2005 February 1 (3.1.1 BETA)</h3><p><ul>

1601

<li>Automatic caching of prepared statements in the TCL interface</li>

1602

<li>ATTACH and DETACH as well as some other operations cause existing

1603

prepared statements to expire.</li>

1604

<li>Numerous minor bug fixes</li>

1605

</ul></p><h3>2005 January 21 (3.1.0 ALPHA)</h3><p><ul>

1606

<li>Autovacuum support added</li>

1607

<li>CURRENT_TIME, CURRENT_DATE, and CURRENT_TIMESTAMP added</li>

1608

<li>Support for the EXISTS clause added.</li>

1609

<li>Support for correlated subqueries added.</li>

1610

<li>Added the ESCAPE clause on the LIKE operator.</li>

1611

<li>Support for ALTER TABLE ... RENAME TABLE ... added</li>

1612

<li>AUTOINCREMENT keyword supported on INTEGER PRIMARY KEY</li>

1613

<li>Many SQLITE_OMIT_ macros inserts to omit features at compile-time

1614

and reduce the library footprint.</li>

1615

<li>The REINDEX command was added.</li>

1616

<li>The engine no longer consults the main table if it can get

1617

all the information it needs from an index.</li>

1618

<li>Many nuisance bugs fixed.</li>

1619

</ul></p><a name="version_3_0_8"></a>

1620

<h3>2004 October 11 (3.0.8)</h3><p><ul>

1621

<li>Add support for DEFERRED, IMMEDIATE, and EXCLUSIVE transactions.</li>

1622

<li>Allow new user-defined functions to be created when there are

1623

already one or more precompiled SQL statements.<li>

1624

<li>Fix portability problems for MinGW/MSYS.</li>

1625

<li>Fix a byte alignment problem on 64-bit Sparc machines.</li>

1626

<li>Fix the ".import" command of the shell so that it ignores \r

1627

characters at the end of lines.</li>

1628

<li>The "csv" mode option in the shell puts strings inside double-quotes.</li>

1629

<li>Fix typos in documentation.</li>

1630

<li>Convert array constants in the code to have type "const".</li>

1631

<li>Numerous code optimizations, specially optimizations designed to

1632

make the code footprint smaller.</li>

1633

</ul></p><a name="version_3_0_7"></a>

1634

<h3>2004 September 18 (3.0.7)</h3><p><ul>

1635

<li>The BTree module allocates large buffers using malloc() instead of

1636

off of the stack, in order to play better on machines with limited

1637

stack space.</li>

1638

<li>Fixed naming conflicts so that versions 2.8 and 3.0 can be

1639

linked and used together in the same ANSI-C source file.</li>

1640

<li>New interface: sqlite3_bind_parameter_index()</li>

1641

<li>Add support for wildcard parameters of the form: "?nnn"</li>

1642

<li>Fix problems found on 64-bit systems.</li>

1643

<li>Removed encode.c file (containing unused routines) from the

1644

version 3.0 source tree.</li>

1645

<li>The sqlite3_trace() callbacks occur before each statement

1646

is executed, not when the statement is compiled.</li>

1647

<li>Makefile updates and miscellaneous bug fixes.</li>

1648

</ul></p><h3>2004 September 02 (3.0.6 beta)</h3><p><ul>

1649

<li>Better detection and handling of corrupt database files.</li>

1650

<li>The sqlite3_step() interface returns SQLITE_BUSY if it is unable

1651

to commit a change because of a lock</li>

1652

<li>Combine the implementations of LIKE and GLOB into a single

1653

pattern-matching subroutine.</li>

1654

<li>Miscellaneous code size optimizations and bug fixes</li>

1655

</ul></p><h3>2004 August 29 (3.0.5 beta)</h3><p><ul>

1656

<li>Support for ":AAA" style bind parameter names.</li>

1657

<li>Added the new sqlite3_bind_parameter_name() interface.</li>

1658

<li>Support for TCL variable names embedded in SQL statements in the

1659

TCL bindings.</li>

1660

<li>The TCL bindings transfer data without necessarily doing a conversion

1661

to a string.</li>

1662

<li>The database for TEMP tables is not created until it is needed.</li>

1663

<li>Add the ability to specify an alternative temporary file directory

1664

using the "sqlite_temp_directory" global variable.</li>

1665

<li>A compile-time option (SQLITE_BUSY_RESERVED_LOCK) causes the busy

1666

handler to be called when there is contention for a RESERVED lock.</li>

1667

<li>Various bug fixes and optimizations</li>

1668

</ul></p><h3>2004 August 8 (3.0.4 beta)</h3><p><ul>

1669

<li>CREATE TABLE and DROP TABLE now work correctly as prepared statements.</li>

1670

<li>Fix a bug in VACUUM and UNIQUE indices.</li>

1671

<li>Add the ".import" command to the command-line shell.</li>

1672

<li>Fix a bug that could cause index corruption when an attempt to

1673

delete rows of a table is blocked by a pending query.</li>

1674

<li>Library size optimizations.</li>

1675

<li>Other minor bug fixes.</li>

1676

</ul></p><a name="version_2_8_15"></a>

1677

1678

<li>This is a maintenance release only. Various minor bugs have been

1679

fixed and some portability enhancements are added.</li>

1680

</ul></p><h3>2004 July 22 (3.0.3 beta)</h3><p><ul>

1681

<li>The second beta release for SQLite 3.0.</li>

1682

<li>Add support for "PRAGMA page_size" to adjust the page size of

1683

the database.</li>

1684

<li>Various bug fixes and documentation updates.</li>

1685

</ul></p><h3>2004 June 30 (3.0.2 beta)</h3><p><ul>

1686

<li>The first beta release for SQLite 3.0.</li>

1687

</ul></p><h3>2004 June 22 (3.0.1 alpha)</h3><p><ul>

1688

1689

*** Alpha Release - Research And Testing Use Only ***</b></font>

1690

<li>Lots of bug fixes.</li>

1691

</ul></p><h3>2004 June 18 (3.0.0 alpha)</h3><p><ul>

1692

1693

*** Alpha Release - Research And Testing Use Only ***</b></font>

1694

<li>Support for internationalization including UTF-8, UTF-16, and

1695

user defined collating sequences.</li>

1696

<li>New file format that is 25% to 35% smaller for typical use.</li>

1697

<li>Improved concurrency.</li>

1698

<li>Atomic commits for ATTACHed databases.</li>

1699

<li>Remove cruft from the APIs.</li>

1700

<li>BLOB support.</li>

1701

<li>64-bit rowids.</li>

1702

<li><a href="version3.html">More information</a>.

1703

</ul></p><a name="version_2_8_14"></a>

1704

1705

<li>Fix the min() and max() optimizer so that it works when the FROM

1706

clause consists of a subquery.</li>

1707

<li>Ignore extra whitespace at the end of of "." commands in the shell.</li>

1708

<li>Bundle sqlite_encode_binary() and sqlite_decode_binary() with the

1709

library.</li>

1710

<li>The TEMP_STORE and DEFAULT_TEMP_STORE pragmas now work.</li>

1711

<li>Code changes to compile cleanly using OpenWatcom.</li>

1712

<li>Fix VDBE stack overflow problems with INSTEAD OF triggers and

1713

NULLs in IN operators.</li>

1714

<li>Add the global variable sqlite_temp_directory which if set defines the

1715

directory in which temporary files are stored.</li>

1716

<li>sqlite_interrupt() plays well with VACUUM.</li>

1717

<li>Other minor bug fixes.</li>

1718

</ul></p><a name="version_2_8_13"></a>

1719

<h3>2004 March 8 (2.8.13)</h3><p><ul>

1720

<li>Refactor parts of the code in order to make the code footprint

1721

smaller. The code is now also a little bit faster.</li>

1722

<li>sqlite_exec() is now implemented as a wrapper around sqlite_compile()

1723

and sqlite_step().</li>

1724

<li>The built-in min() and max() functions now honor the difference between

1725

NUMERIC and TEXT datatypes. Formerly, min() and max() always assumed

1726

their arguments were of type NUMERIC.</li>

1727

<li>New HH:MM:SS modifier to the built-in date/time functions.</li>

1728

<li>Experimental sqlite_last_statement_changes() API added. Fixed

1729

the last_insert_rowid() function so that it works correctly with

1730

triggers.</li>

1731

<li>Add functions prototypes for the database encryption API.</li>

1732

<li>Fix several nuisance bugs.</li>

1733

</ul></p><a name="version_2_8_12"></a>

1734

<h3>2004 February 8 (2.8.12)</h3><p><ul>

1735

<li>Fix a bug that will might corrupt the rollback journal if a power failure

1736

or external program halt occurs in the middle of a COMMIT. The corrupt

1737

journal can lead to database corruption when it is rolled back.</li>

1738

<li>Reduce the size and increase the speed of various modules, especially

1739

the virtual machine.</li>

1740

<li>Allow "<expr> IN <table>" as a shorthand for

1741

"<expr> IN (SELECT * FROM <table>".</li>

1742

<li>Optimizations to the sqlite_mprintf() routine.</li>

1743

<li>Make sure the MIN() and MAX() optimizations work within subqueries.</li>

1744

</ul></p><a name="version_2_8_11"></a>

1745

<h3>2004 January 14 (2.8.11)</h3><p><ul>

1746

<li>Fix a bug in how the IN operator handles NULLs in subqueries. The bug

1747

was introduced by the previous release.</li>

1748

</ul></p><a name="version_2_8_10"></a>

1749

<h3>2004 January 13 (2.8.10)</h3><p><ul>

1750

<li>Fix a potential database corruption problem on Unix caused by the fact

1751

that all POSIX advisory locks are cleared whenever you close() a file.

1752

The work around it to embargo all close() calls while locks are

1753

outstanding.</li>

1754

<li>Performance enhancements on some corner cases of COUNT(*).</li>

1755

<li>Make sure the in-memory backend response sanely if malloc() fails.</li>

1756

<li>Allow sqlite_exec() to be called from within user-defined SQL

1757

functions.</li>

1758

<li>Improved accuracy of floating-point conversions using "long double".</li>

1759

<li>Bug fixes in the experimental date/time functions.</li>

1760

</ul></p><a name="version_2_8_9"></a>

1761

<h3>2004 January 5 (2.8.9)</h3><p><ul>

1762

<li>Fix a 32-bit integer overflow problem that could result in corrupt

1763

indices in a database if large negative numbers (less than -2147483648)

1764

were inserted into an indexed numeric column.</li>

1765

<li>Fix a locking problem on multi-threaded Linux implementations.</li>

1766

<li>Always use "." instead of "," as the decimal point even if the locale

1767

requests ",".</li>

1768

<li>Added UTC to localtime conversions to the experimental date/time

1769

functions.</li>

1770

<li>Bug fixes to date/time functions.</li>

1771

</ul></p><a name="version_2_8_8"></a>

1772

<h3>2003 December 17 (2.8.8)</h3><p><ul>

1773

<li>Fix a critical bug introduced into 2.8.0 which could cause

1774

database corruption.</li>

1775

<li>Fix a problem with 3-way joins that do not use indices</li>

1776

<li>The VACUUM command now works with the non-callback API</li>

1777

<li>Improvements to the "PRAGMA integrity_check" command</li>

1778

</ul></p><a name="version_2_8_7"></a>

1779

<h3>2003 December 4 (2.8.7)</h3><p><ul>

1780

<li>Added experimental sqlite_bind() and sqlite_reset() APIs.</li>

1781

<li>If the name of the database is an empty string, open a new database

1782

in a temporary file that is automatically deleted when the database

1783

is closed.</li>

1784

<li>Performance enhancements in the lemon-generated parser</li>

1785

<li>Experimental date/time functions revised.</li>

1786

<li>Disallow temporary indices on permanent tables.</li>

1787

<li>Documentation updates and typo fixes</li>

1788

<li>Added experimental sqlite_progress_handler() callback API</li>

1789

<li>Removed support for the Oracle8 outer join syntax.</li>

1790

<li>Allow GLOB and LIKE operators to work as functions.</li>

1791

<li>Other minor documentation and makefile changes and bug fixes.</li>

1792

</ul></p><a name="version_2_8_6"></a>

1793

<h3>2003 August 21 (2.8.6)</h3><p><ul>

1794

<li>Moved the CVS repository to www.sqlite.org</li>

1795

<li>Update the NULL-handling documentation.</li>

1796

<li>Experimental date/time functions added.</li>

1797

<li>Bug fix: correctly evaluate a view of a view without segfaulting.</li>

1798

<li>Bug fix: prevent database corruption if you dropped a

1799

trigger that had the same name as a table.</li>

1800

<li>Bug fix: allow a VACUUM (without segfaulting) on an empty

1801

database after setting the EMPTY_RESULT_CALLBACKS pragma.</li>

1802

<li>Bug fix: if an integer value will not fit in a 32-bit int, store it in

1803

a double instead.</li>

1804

<li>Bug fix: Make sure the journal file directory entry is committed to disk

1805

before writing the database file.</li>

1806

</ul></p><a name="version_2_8_5"></a>

1807

1808

<li>Make LIMIT work on a compound SELECT statement.</li>

1809

<li>LIMIT 0 now shows no rows. Use LIMIT -1 to see all rows.</li>

1810

<li>Correctly handle comparisons between an INTEGER PRIMARY KEY and

1811

a floating point number.</li>

1812

<li>Fix several important bugs in the new ATTACH and DETACH commands.</li>

1813

<li>Updated the <a href="nulls.html">NULL-handling document</a>.</li>

1814

<li>Allow NULL arguments in sqlite_compile() and sqlite_step().</li>

1815

<li>Many minor bug fixes</li>

1816

</ul></p><a name="version_2_8_4"></a>

1817

1818

<li>Enhanced the "PRAGMA integrity_check" command to verify indices.</li>

1819

<li>Added authorization hooks for the new ATTACH and DETACH commands.</li>

1820

<li>Many documentation updates</li>

1821

<li>Many minor bug fixes</li>

1822

</ul></p><a name="version_2_8_3"></a>

1823

1824

<li>Fix a problem that will corrupt the indices on a table if you

1825

do an INSERT OR REPLACE or an UPDATE OR REPLACE on a table that

1826

contains an INTEGER PRIMARY KEY plus one or more indices.</li>

1827

<li>Fix a bug in Windows locking code so that locks work correctly

1828

when simultaneously accessed by Win95 and WinNT systems.</li>

1829

<li>Add the ability for INSERT and UPDATE statements to refer to the

1830

"rowid" (or "_rowid_" or "oid") columns.</li>

1831

<li>Other important bug fixes</li>

1832

</ul></p><a name="version_2_8_2"></a>

1833

1834

<li>Fix a problem that will corrupt the database file if you drop a

1835

table from the main database that has a TEMP index.</li>

1836

</ul></p><a name="version_2_8_1"></a>

1837

1838

<li>Reactivated the VACUUM command that reclaims unused disk space in

1839

a database file.</li>

1840

<li>Added the ATTACH and DETACH commands to allow interacting with multiple

1841

database files at the same time.</li>

1842

<li>Added support for TEMP triggers and indices.</li>

1843

<li>Added support for in-memory databases.</li>

1844

<li>Removed the experimental sqlite_open_aux_file(). Its function is

1845

subsumed in the new ATTACH command.</li>

1846

<li>The precedence order for ON CONFLICT clauses was changed so that

1847

ON CONFLICT clauses on BEGIN statements have a higher precedence than

1848

ON CONFLICT clauses on constraints.

1849

<li>Many, many bug fixes and compatibility enhancements.</li>

1850

</ul></p><a name="version_2_8_0"></a>

1851

1852

<li>Modified the journal file format to make it more resistant to corruption

1853

that can occur after an OS crash or power failure.</li>

1854

<li>Added a new C/C++ API that does not use callback for returning data.</li>

1855

</ul></p><a name="version_2_7_6"></a>

1856

1857

<li>Performance improvements. The library is now much faster.</li>

1858

<li>Added the <b>sqlite_set_authorizer()</b> API. Formal documentation has

1859

not been written - see the source code comments for instructions on

1860

how to use this function.</li>

1861

<li>Fix a bug in the GLOB operator that was preventing it from working

1862

with upper-case letters.</li>

1863

<li>Various minor bug fixes.</li>

1864

</ul></p><a name="version_2_7_5"></a>

1865

1866

<li>Fix an uninitialized variable in pager.c which could (with a probability

1867

of about 1 in 4 billion) result in a corrupted database.</li>

1868

</ul></p><a name="version_2_7_4"></a>

1869

1870

<li>Database files can now grow to be up to 2^41 bytes. The old limit

1871

was 2^31 bytes.</li>

1872

<li>The optimizer will now scan tables in the reverse if doing so will

1873

satisfy an ORDER BY ... DESC clause.</li>

1874

<li>The full pathname of the database file is now remembered even if

1875

a relative path is passed into sqlite_open(). This allows

1876

the library to continue operating correctly after a chdir().</li>

1877

<li>Speed improvements in the VDBE.</li>

1878

<li>Lots of little bug fixes.</li>

1879

</ul></p><a name="version_2_7_3"></a>

1880

1881

<li>Various compiler compatibility fixes.</li>

1882

<li>Fix a bug in the "expr IN ()" operator.</li>

1883

<li>Accept column names in parentheses.</li>

1884

<li>Fix a problem with string memory management in the VDBE</li>

1885

<li>Fix a bug in the "table_info" pragma"</li>

1886

<li>Export the sqlite_function_type() API function in the Windows DLL</li>

1887

<li>Fix locking behavior under Windows</li>

1888

<li>Fix a bug in LEFT OUTER JOIN</li>

1889

</ul></p><a name="version_2_7_2"></a>

1890

1891

<li>Prevent journal file overflows on huge transactions.</li>

1892

<li>Fix a memory leak that occurred when sqlite_open() failed.</li>

1893

<li>Honor the ORDER BY and LIMIT clause of a SELECT even if the

1894

result set is used for an INSERT.</li>

1895

<li>Do not put write locks on the file used to hold TEMP tables.</li>

1896

<li>Added documentation on SELECT DISTINCT and on how SQLite handles NULLs.</li>

1897

<li>Fix a problem that was causing poor performance when many thousands

1898

of SQL statements were executed by a single sqlite_exec() call.</li>

1899

</ul></p><a name="version_2_7_1"></a>

1900

1901

<li>Fix a bug in the ORDER BY logic that was introduced in version 2.7.0</li>

1902

<li>C-style comments are now accepted by the tokenizer.</li>

1903

<li>INSERT runs a little faster when the source is a SELECT statement.</li>

1904

</ul></p><a name="version_2_7_0"></a>

1905

1906

<li>Make a distinction between numeric and text values when sorting.

1907

Text values sort according to memcmp(). Numeric values sort in

1908

numeric order.</li>

1909

<li>Allow multiple simultaneous readers under Windows by simulating

1910

the reader/writers locks that are missing from Win95/98/ME.</li>

1911

<li>An error is now returned when trying to start a transaction if

1912

another transaction is already active.</li>

1913

</ul></p><a name="version_2_6_3"></a>

1914

1915

<li>Add the ability to read both little-endian and big-endian databases.

1916

So a database created under SunOS or Mac OS X can be read and written

1917

under Linux or Windows and vice versa.</li>

1918

<li>Convert to the new website: http://www.sqlite.org/</li>

1919

<li>Allow transactions to span Linux Threads</li>

1920

<li>Bug fix in the processing of the ORDER BY clause for GROUP BY queries</li>

1921

</ul></p><a name="version_2_6_2"></a>

1922

1923

<li>Text files read by the COPY command can now have line terminators

1924

of LF, CRLF, or CR.</li>

1925

<li>SQLITE_BUSY is handled correctly if encountered during database

1926

initialization.</li>

1927

<li>Fix to UPDATE triggers on TEMP tables.</li>

1928

<li>Documentation updates.</li>

1929

</ul></p><a name="version_2_6_1"></a>

1930

1931

<li>Include a static string in the library that responds to the RCS

1932

"ident" command and which contains the library version number.</li>

1933

<li>Fix an assertion failure that occurred when deleting all rows of

1934

a table with the "count_changes" pragma turned on.</li>

1935

<li>Better error reporting when problems occur during the automatic

1936

2.5.6 to 2.6.0 database format upgrade.</li>

1937

</ul></p><a name="version_2_6_0"></a>

1938

1939

<li>Change the format of indices to correct a design flaw the originated

1940

with version 2.1.0. <font color="red">*** This is an incompatible

1941

file format change ***</font> When version 2.6.0 or later of the

1942

library attempts to open a database file created by version 2.5.6 or

1943

earlier, it will automatically and irreversibly convert the file format.

1944

<b>Make backup copies of older database files before opening them with

1945

version 2.6.0 of the library.</b>

1946

</li>

1947

</ul></p><a name="version_2_5_6"></a>

1948

1949

<li>Fix more problems with rollback. Enhance the test suite to exercise

1950

the rollback logic extensively in order to prevent any future problems.

1951

</li>

1952

</ul></p><a name="version_2_5_5"></a>

1953

1954

<li>Fix a bug which could cause database corruption during a rollback.

1955

This bugs was introduced in version 2.4.0 by the freelist

1956

optimization of checkin [410].</li>

1957

<li>Fix a bug in aggregate functions for VIEWs.</li>

1958

<li>Other minor changes and enhancements.</li>

1959

</ul></p><a name="version_2_5_4"></a>

1960

1961

<li>Make the "AS" keyword optional again.</li>

1962

<li>The datatype of columns now appear in the 4th argument to the

1963

callback.</li>

1964

<li>Added the <b>sqlite_open_aux_file()</b> API, though it is still

1965

mostly undocumented and untested.</li>

1966

<li>Added additional test cases and fixed a few bugs that those

1967

test cases found.</li>

1968

</ul></p><a name="version_2_5_3"></a>

1969

1970

<li>Bug fix: Database corruption can occur due to the optimization

1971

that was introduced in version 2.4.0 (check-in [410]). The problem

1972

should now be fixed. The use of versions 2.4.0 through 2.5.2 is

1973

not recommended.</li>

1974

</ul></p><a name="version_2_5_2"></a>

1975

1976

<li>Added the new <b>SQLITE_TEMP_MASTER</b> table which records the schema

1977

for temporary tables in the same way that <b>SQLITE_MASTER</b> does for

1978

persistent tables.</li>

1979

<li>Added an optimization to UNION ALL</li>

1980

<li>Fixed a bug in the processing of LEFT OUTER JOIN</li>

1981

<li>The LIMIT clause now works on subselects</li>

1982

<li>ORDER BY works on subselects</li>

1983

<li>There is a new TypeOf() function used to determine if an expression

1984

is numeric or text.</li>

1985

<li>Autoincrement now works for INSERT from a SELECT.</li>

1986

</ul></p><a name="version_2_5_1"></a>

1987

1988

<li>The query optimizer now attempts to implement the ORDER BY clause

1989

using an index. Sorting is still used if not suitable index is

1990

available.</li>

1991

</ul></p><a name="version_2_5_0"></a>

1992

1993

<li>Added support for row triggers.</li>

1994

<li>Added SQL-92 compliant handling of NULLs.</li>

1995

<li>Add support for the full SQL-92 join syntax and LEFT OUTER JOINs.</li>

1996

<li>Double-quoted strings interpreted as column names not text literals.</li>

1997

<li>Parse (but do not implement) foreign keys.</li>

1998

<li>Performance improvements in the parser, pager, and WHERE clause code

1999

generator.</li>

2000

<li>Make the LIMIT clause work on subqueries. (ORDER BY still does not

2001

work, though.)</li>

2002

<li>Added the "%Q" expansion to sqlite_*_printf().</li>

2003

<li>Bug fixes too numerous to mention (see the change log).</li>

2004

</ul></p><a name="version_2_4_12"></a>

2005

2006

<li>Added logic to detect when the library API routines are called out

2007

of sequence.</li>

2008

</ul></p><a name="version_2_4_11"></a>

2009

2010

<li>Bug fix: Column names in the result set were not being generated

2011

correctly for some (rather complex) VIEWs. This could cause a

2012

segfault under certain circumstances.</li>

2013

</ul></p><a name="version_2_4_10"></a>

2014

2015

<li>Bug fix: Generate correct column headers when a compound SELECT is used

2016

as a subquery.</li>

2017

<li>Added the sqlite_encode_binary() and sqlite_decode_binary() functions to

2018

the source tree. But they are not yet linked into the library.</li>

2019

<li>Documentation updates.</li>

2020

<li>Export the sqlite_changes() function from Windows DLLs.</li>

2021

<li>Bug fix: Do not attempt the subquery flattening optimization on queries

2022

that lack a FROM clause. To do so causes a segfault.</li>

2023

</ul></p><a name="version_2_4_9"></a>

2024

2025

<li>Fix a bug that was causing the precompiled binary of SQLITE.EXE to

2026

report "out of memory" under Windows 98.</li>

2027

</ul></p><a name="version_2_4_8"></a>

2028

2029

<li>Make sure VIEWs are created after their corresponding TABLEs in the

2030

output of the <b>.dump</b> command in the shell.</li>

2031

<li>Speed improvements: Do not do synchronous updates on TEMP tables.</li>

2032

<li>Many improvements and enhancements to the shell.</li>

2033

<li>Make the GLOB and LIKE operators functions that can be overridden

2034

by a programmer. This allows, for example, the LIKE operator to

2035

be changed to be case sensitive.</li>

2036

</ul></p><a name="version_2_4_7"></a>

2037

2038

<li>Add the ability to put TABLE.* in the column list of a

2039

SELECT statement.</li>

2040

<li>Permit SELECT statements without a FROM clause.</li>

2041

<li>Added the <b>last_insert_rowid()</b> SQL function.</li>

2042

<li>Do not count rows where the IGNORE conflict resolution occurs in

2043

the row count.</li>

2044

<li>Make sure functions expressions in the VALUES clause of an INSERT

2045

are correct.</li>

2046

<li>Added the <b>sqlite_changes()</b> API function to return the number

2047

of row that changed in the most recent operation.</li>

2048

</ul></p><a name="version_2_4_6"></a>

2049

2050

<li>Bug fix: Correctly handle terms in the WHERE clause of a join that

2051

do not contain a comparison operator.</li>

2052

</ul></p><a name="version_2_4_5"></a>

2053

2054

<li>Bug fix: Correctly handle functions that appear in the WHERE clause

2055

of a join.</li>

2056

<li>When the PRAGMA vdbe_trace=ON is set, correctly print the P3 operand

2057

value when it is a pointer to a structure rather than a pointer to

2058

a string.</li>

2059

<li>When inserting an explicit NULL into an INTEGER PRIMARY KEY, convert

2060

the NULL value into a unique key automatically.</li>

2061

</ul></p><a name="version_2_4_4"></a>

2062

2063

<li>Allow "VIEW" to be a column name</li>

2064

<li>Added support for CASE expressions (patch from Dan Kennedy)</li>

2065

<li>Added RPMS to the delivery (patches from Doug Henry)</li>

2066

<li>Fix typos in the documentation</li>

2067

<li>Cut over configuration management to a new CVS repository with

2068

its own CVSTrac bug tracking system.</li>

2069

</ul></p><a name="version_2_4_3"></a>

2070

2071

<li>Fix a bug in SELECT that occurs when a compound SELECT is used as a

2072

subquery in the FROM of a SELECT.</li>

2073

<li>The <b>sqlite_get_table()</b> function now returns an error if you

2074

give it two or more SELECTs that return different numbers of columns.</li>

2075

</ul></p><a name="version_2_4_2"></a>

2076

2077

<li>Bug fix: Fix an assertion failure that occurred when ROWID was a column

2078

in a SELECT statement on a view.</li>

2079

<li>Bug fix: Fix an uninitialized variable in the VDBE that would could an

2080

assert failure.</li>

2081

<li>Make the os.h header file more robust in detecting when the compile is

2082

for Windows and when it is for Unix.</li>

2083

</ul></p><a name="version_2_4_1"></a>

2084

2085

<li>Using an unnamed subquery in a FROM clause would cause a segfault.</li>

2086

<li>The parser now insists on seeing a semicolon or the end of input before

2087

executing a statement. This avoids an accidental disaster if the

2088

WHERE keyword is misspelled in an UPDATE or DELETE statement.</li>

2089

</ul></p><a name="version_2_4_0"></a>

2090

2091

<li>Change the name of the sanity_check PRAGMA to <b>integrity_check</b>

2092

and make it available in all compiles.</li>

2093

<li>SELECT min() or max() of an indexed column with no WHERE or GROUP BY

2094

clause is handled as a special case which avoids a complete table scan.</li>

2095

<li>Automatically generated ROWIDs are now sequential.</li>

2096

<li>Do not allow dot-commands of the command-line shell to occur in the

2097

middle of a real SQL command.</li>

2098

<li>Modifications to the "lemon" parser generator so that the parser tables

2099

are 4 times smaller.</li>

2100

<li>Added support for user-defined functions implemented in C.</li>

2101

<li>Added support for new functions: <b>coalesce()</b>, <b>lower()</b>,

2102

<b>upper()</b>, and <b>random()</b>

2103

<li>Added support for VIEWs.</li>

2104

<li>Added the subquery flattening optimizer.</li>

2105

<li>Modified the B-Tree and Pager modules so that disk pages that do not

2106

contain real data (free pages) are not journaled and are not

2107

written from memory back to the disk when they change. This does not

2108

impact database integrity, since the

2109

pages contain no real data, but it does make large INSERT operations

2110

about 2.5 times faster and large DELETEs about 5 times faster.</li>

2111

<li>Made the CACHE_SIZE pragma persistent</li>

2112

<li>Added the SYNCHRONOUS pragma</li>

2113

<li>Fixed a bug that was causing updates to fail inside of transactions when

2114

the database contained a temporary table.</li>

2115

</ul></p><a name="version_2_3_3"></a>

2116

2117

<li>Allow identifiers to be quoted in square brackets, for compatibility

2118

with MS-Access.</li>

2119

<li>Added support for sub-queries in the FROM clause of a SELECT.</li>

2120

<li>More efficient implementation of sqliteFileExists() under Windows.

2121

(by Joel Luscy)</li>

2122

<li>The VALUES clause of an INSERT can now contain expressions, including

2123

scalar SELECT clauses.</li>

2124

<li>Added support for CREATE TABLE AS SELECT</li>

2125

<li>Bug fix: Creating and dropping a table all within a single

2126

transaction was not working.</li>

2127

</ul></p><a name="version_2_3_2"></a>

2128

2129

<li>Bug fix: There was an incorrect assert() in pager.c. The real code was

2130

all correct (as far as is known) so everything should work OK if you

2131

compile with -DNDEBUG=1. When asserts are not disabled, there

2132

could be a fault.</li>

2133

</ul></p><a name="version_2_3_1"></a>

2134

2135

<li>Bug fix: An assertion was failing if "PRAGMA full_column_names=ON;" was

2136

set and you did a query that used a rowid, like this:

2137

"SELECT rowid, * FROM ...".</li>

2138

</ul></p><a name="version_2_3_0"></a>

2139

2140

<li>Fix a serious bug in the INSERT command which was causing data to go

2141

into the wrong columns if the data source was a SELECT and the INSERT

2142

clauses specified its columns in some order other than the default.</li>

2143

<li>Added the ability to resolve constraint conflicts is ways other than

2144

an abort and rollback. See the documentation on the "ON CONFLICT"

2145

clause for details.</li>

2146

<li>Temporary files are now automatically deleted by the operating system

2147

when closed. There are no more dangling temporary files on a program

2148

crash. (If the OS crashes, fsck will delete the file after reboot

2149

under Unix. I do not know what happens under Windows.)</li>

2150

<li>NOT NULL constraints are honored.</li>

2151

<li>The COPY command puts NULLs in columns whose data is '\N'.</li>

2152

<li>In the COPY command, backslash can now be used to escape a newline.</li>

2153

<li>Added the SANITY_CHECK pragma.</li>

2154

</ul></p><a name="version_2_2_5"></a>

2155

2156

<li>Important bug fix: the IN operator was not working if either the

2157

left-hand or right-hand side was derived from an INTEGER PRIMARY KEY.</li>

2158

<li>Do not escape the backslash '\' character in the output of the

2159

<b>sqlite</b> command-line access program.</li>

2160

</ul></p><a name="version_2_2_4"></a>

2161

2162

<li>The label to the right of an AS in the column list of a SELECT can now

2163

be used as part of an expression in the WHERE, ORDER BY, GROUP BY, and/or

2164

HAVING clauses.</li>

2165

<li>Fix a bug in the <b>-separator</b> command-line option to the <b>sqlite</b>

2166

command.</li>

2167

<li>Fix a problem with the sort order when comparing upper-case strings against

2168

characters greater than 'Z' but less than 'a'.</li>

2169

<li>Report an error if an ORDER BY or GROUP BY expression is constant.</li>

2170

</ul></p><a name="version_2_2_3"></a>

2171

2172

<li>Fix warning messages in VC++ 7.0. (Patches from nicolas352001)</li>

2173

<li>Make the library thread-safe. (The code is there and appears to work

2174

but has not been stressed.)</li>

2175

<li>Added the new <b>sqlite_last_insert_rowid()</b> API function.</li>

2176

</ul></p><a name="version_2_2_2"></a>

2177

2178

<li>Bug fix: An assertion was failing when a temporary table with an index

2179

had the same name as a permanent table created by a separate process.</li>

2180

<li>Bug fix: Updates to tables containing an INTEGER PRIMARY KEY and an

2181

index could fail.</li>

2182

</ul></p><a name="version_2_2_1"></a>

2183

2184

<li>Bug fix: An attempt to delete a single row of a table with a WHERE

2185

clause of "ROWID=x" when no such rowid exists was causing an error.</li>

2186

<li>Bug fix: Passing in a NULL as the 3rd parameter to <b>sqlite_open()</b>

2187

would sometimes cause a coredump.</li>

2188

<li>Bug fix: DROP TABLE followed by a CREATE TABLE with the same name all

2189

within a single transaction was causing a coredump.</li>

2190

<li>Makefile updates from A. Rottmann</li>

2191

</ul></p><a name="version_2_2_0"></a>

2192

2193

<li>Columns of type INTEGER PRIMARY KEY are actually used as the primary

2194

key in underlying B-Tree representation of the table.</li>

2195

<li>Several obscure, unrelated bugs were found and fixed while

2196

implemented the integer primary key change of the previous bullet.</li>

2197

<li>Added the ability to specify "*" as part of a larger column list in

2198

the result section of a SELECT statement. For example:

2199

<nobr>"<b>SELECT rowid, * FROM table1;</b>"</nobr>.</li>

2200

<li>Updates to comments and documentation.</li>

2201

</ul></p><a name="version_2_1_7"></a>

2202

2203

<li>Fix a bug in <b>CREATE TEMPORARY TABLE</b> which was causing the

2204

table to be initially allocated in the main database file instead

2205

of in the separate temporary file. This bug could cause the library

2206

to suffer an assertion failure and it could cause "page leaks" in the

2207

main database file.

2208

<li>Fix a bug in the b-tree subsystem that could sometimes cause the first

2209

row of a table to be repeated during a database scan.</li>

2210

</ul></p><a name="version_2_1_6"></a>

2211

2212

<li>Fix the locking mechanism yet again to prevent

2213

<b>sqlite_exec()</b> from returning SQLITE_PROTOCOL

2214

unnecessarily. This time the bug was a race condition in

2215

the locking code. This change affects both POSIX and Windows users.</li>

2216

</ul></p><a name="version_2_1_5"></a>

2217

2218

<li>Fix for another problem (unrelated to the one fixed in 2.1.4)

2219

that sometimes causes <b>sqlite_exec()</b> to return SQLITE_PROTOCOL

2220

unnecessarily. This time the bug was

2221

in the POSIX locking code and should not effect Windows users.</li>

2222

</ul></p><a name="version_2_1_4"></a>

2223

2224

<li>Sometimes <b>sqlite_exec()</b> would return SQLITE_PROTOCOL when it

2225

should have returned SQLITE_BUSY.</li>

2226

<li>The fix to the previous bug uncovered a deadlock which was also

2227

fixed.</li>

2228

<li>Add the ability to put a single .command in the second argument

2229

of the sqlite shell</li>

2230

<li>Updates to the FAQ</li>

2231

</ul></p><a name="version_2_1_3"></a>

2232

2233

<li>Fix the behavior of comparison operators

2234

(ex: "<b>&lt</b>", "<b>==</b>", etc.)

2235

so that they are consistent with the order of entries in an index.</li>

2236

<li>Correct handling of integers in SQL expressions that are larger than

2237

what can be represented by the machine integer.</li>

2238

</ul></p><a name="version_2_1_2"></a>

2239

2240

<li>Changes to support 64-bit architectures.</li>

2241

<li>Fix a bug in the locking protocol.</li>

2242

<li>Fix a bug that could (rarely) cause the database to become

2243

unreadable after a DROP TABLE due to corruption to the SQLITE_MASTER

2244

table.</li>

2245

<li>Change the code so that version 2.1.1 databases that were rendered

2246

unreadable by the above bug can be read by this version of

2247

the library even though the SQLITE_MASTER table is (slightly)

2248

corrupted.</li>

2249

</ul></p><a name="version_2_1_1"></a>

2250

2251

<li>Bug fix: Sometimes arbitrary strings were passed to the callback

2252

function when the actual value of a column was NULL.</li>

2253

</ul></p><a name="version_2_1_0"></a>

2254

2255

<li>Change the format of data records so that records up to 16MB in size

2256

can be stored.</li>

2257

<li>Change the format of indices to allow for better query optimization.</li>

2258

<li>Implement the "LIMIT ... OFFSET ..." clause on SELECT statements.</li>

2259

</ul></p><a name="version_2_0_8"></a>

2260

2261

<li>Made selected parameters in API functions <b>const</b>. This should

2262

be fully backwards compatible.</li>

2263

<li>Documentation updates</li>

2264

<li>Simplify the design of the VDBE by restricting the number of sorters

2265

and lists to 1.

2266

In practice, no more than one sorter and one list was ever used anyhow.

2267

</li>

2268

</ul></p><a name="version_2_0_7"></a>

2269

2270

<li>Any UTF-8 character or ISO8859 character can be used as part of

2271

an identifier.</li>

2272

<li>Patches from Christian Werner to improve ODBC compatibility and to

2273

fix a bug in the round() function.</li>

2274

<li>Plug some memory leaks that use to occur if malloc() failed.

2275

We have been and continue to be memory leak free as long as

2276

malloc() works.</li>

2277

<li>Changes to some test scripts so that they work on Windows in

2278

addition to Unix.</li>

2279

</ul></p><a name="version_2_0_6"></a>

2280

2281

<li>Added the EMPTY_RESULT_CALLBACKS pragma</li>

2282

<li>Support for UTF-8 and ISO8859 characters in column and table names.</li>

2283

<li>Bug fix: Compute correct table names with the FULL_COLUMN_NAMES pragma

2284

is turned on.</li>

2285

</ul></p><a name="version_2_0_5"></a>

2286

2287

<li>Added the COUNT_CHANGES pragma.</li>

2288

<li>Changes to the FULL_COLUMN_NAMES pragma to help out the ODBC driver.</li>

2289

<li>Bug fix: "SELECT count(*)" was returning NULL for empty tables.

2290

Now it returns 0.</li>

2291

</ul></p><a name="version_2_0_4"></a>

2292

2293

<li>Bug fix: an obscure and relatively harmless bug was causing one of

2294

the tests to fail when gcc optimizations are turned on. This release

2295

fixes the problem.</li>

2296

</ul></p><a name="version_2_0_3"></a>

2297

2298

<li>Bug fix: the <b>sqlite_busy_timeout()</b> function was delaying 1000

2299

times too long before failing.</li>

2300

<li>Bug fix: an assertion was failing if the disk holding the database

2301

file became full or stopped accepting writes for some other reason.

2302

New tests were added to detect similar problems in the future.</li>

2303

<li>Added new operators: <b>&</b> (bitwise-and)

2304

<b>|</b> (bitwise-or), <b>~</b> (ones-complement),

2305

<b><<</b> (shift left), <b>>></b> (shift right).</li>

2306

<li>Added new functions: <b>round()</b> and <b>abs()</b>.</li>

2307

</ul></p><a name="version_2_0_2"></a>

2308

2309

<li>Fix two bugs in the locking protocol. (One was masking the other.)</li>

2310

<li>Removed some unused "#include <unistd.h>" that were causing problems

2311

for VC++.</li>

2312

<li>Fixed <b>sqlite.h</b> so that it is usable from C++</li>

2313

<li>Added the FULL_COLUMN_NAMES pragma. When set to "ON", the names of

2314

columns are reported back as TABLE.COLUMN instead of just COLUMN.</li>

2315

<li>Added the TABLE_INFO() and INDEX_INFO() pragmas to help support the

2316

ODBC interface.</li>

2317

<li>Added support for TEMPORARY tables and indices.</li>

2318

</ul></p><a name="version_2_0_1"></a>

2319

2320

<li>Remove some C++ style comments from btree.c so that it will compile

2321

using compilers other than gcc.</li>

2322

<li>The ".dump" output from the shell does not work if there are embedded

2323

newlines anywhere in the data. This is an old bug that was carried

2324

forward from version 1.0. To fix it, the ".dump" output no longer

2325

uses the COPY command. It instead generates INSERT statements.</li>

2326

<li>Extend the expression syntax to support "expr NOT NULL" (with a

2327

space between the "NOT" and the "NULL") in addition to "expr NOTNULL"

2328

(with no space).</li>

2329

</ul></p><a name="version_2_0_0"></a>

2330

2331

<li>Automatically build binaries for Linux and Windows and put them on

2332

the website.</li>

2333

</ul></p><h3>2001 Sep 28 (2.0-alpha-4)</h3><p><ul>

2334

<li>Incorporate makefile patches form A. Rottmann to use LIBTOOL</li>

2335

</ul></p><h3>2001 Sep 27 (2.0-alpha-3)</h3><p><ul>

2336

<li>SQLite now honors the UNIQUE keyword in CREATE UNIQUE INDEX. Primary

2337

keys are required to be unique.</li>

2338

<li>File format changed back to what it was for alpha-1</li>

2339

<li>Fixes to the rollback and locking behavior</li>

2340

</ul></p><h3>2001 Sep 20 (2.0-alpha-2)</h3><p><ul>

2341

<li>Initial release of version 2.0. The idea of renaming the library

2342

to "SQLus" was abandoned in favor of keeping the "SQLite" name and

2343

bumping the major version number.</li>

2344

<li>The pager and btree subsystems added back. They are now the only

2345

available backend.</li>

2346

<li>The Dbbe abstraction and the GDBM and memory drivers were removed.</li>

2347

<li>Copyright on all code was disclaimed. The library is now in the

2348

public domain.</li>

2349

</ul></p><a name="version_1_0_32"></a>

2350

2351

<li>Pager and btree subsystems removed. These will be used in a follow-on

2352

SQL server library named "SQLus".</li>

2353

<li>Add the ability to use quoted strings as table and column names in

2354

expressions.</li>

2355

</ul></p><a name="version_1_0_31"></a>

2356

2357

<li>Pager subsystem added but not yet used.</li>

2358

<li>More robust handling of out-of-memory errors.</li>

2359

<li>New tests added to the test suite.</li>

2360

</ul></p><a name="version_1_0_30"></a>

2361

2362

<li>Remove the <b>sqlite_encoding</b> TCL variable that was introduced

2363

in the previous version.</li>

2364

<li>Add options <b>-encoding</b> and <b>-tcl-uses-utf</b> to the

2365

<b>sqlite</b> TCL command.</li>

2366

<li>Add tests to make sure that tclsqlite was compiled using Tcl header

2367

files and libraries that match.</li>

2368

</ul></p><a name="version_1_0_29"></a>

2369

2370

<li>The library now assumes data is stored as UTF-8 if the --enable-utf8

2371

option is given to configure. The default behavior is to assume

2372

iso8859-x, as it has always done. This only makes a difference for

2373

LIKE and GLOB operators and the LENGTH and SUBSTR functions.</li>

2374

<li>If the library is not configured for UTF-8 and the Tcl library

2375

is one of the newer ones that uses UTF-8 internally,

2376

then a conversion from UTF-8 to iso8859 and

2377

back again is done inside the TCL interface.</li>

2378

</ul></p><a name="version_1_0_28"></a>

2379

2380

<li>Added limited support for transactions. At this point, transactions

2381

will do table locking on the GDBM backend. There is no support (yet)

2382

for rollback or atomic commit.</li>

2383

<li>Added special column names ROWID, OID, and _ROWID_ that refer to the

2384

unique random integer key associated with every row of every table.</li>

2385

<li>Additional tests added to the regression suite to cover the new ROWID

2386

feature and the TCL interface bugs mentioned below.</li>

2387

<li>Changes to the "lemon" parser generator to help it work better when

2388

compiled using MSVC.</li>

2389

<li>Bug fixes in the TCL interface identified by Oleg Oleinick.</li>

2390

</ul></p><a name="version_1_0_27"></a>

2391

2392

<li>When doing DELETE and UPDATE, the library used to write the record

2393

numbers of records to be deleted or updated into a temporary file.

2394

This is changed so that the record numbers are held in memory.</li>

2395

<li>The DELETE command without a WHILE clause just removes the database

2396

files from the disk, rather than going through and deleting record

2397

by record.</li>

2398

</ul></p><a name="version_1_0_26"></a>

2399

2400

<li>A serious bug fixed on Windows. Windows users should upgrade.

2401

No impact to Unix.</li>

2402

</ul></p><a name="version_1_0_25"></a>

2403

2404

<li>Modify the test scripts to identify tests that depend on system

2405

load and processor speed and

2406

to warn the user that a failure of one of those (rare) tests does

2407

not necessarily mean the library is malfunctioning. No changes to

2408

code.

2409

</li>

2410

</ul></p><a name="version_1_0_24"></a>

2411

2412

<li>Fix a bug which was causing

2413

the UPDATE command to fail on systems where "malloc(0)" returns

2414

NULL. The problem does not appear on Windows, Linux, or HPUX but does

2415

cause the library to fail on QNX.

2416

</li>

2417

</ul></p><a name="version_1_0_23"></a>

2418

2419

<li>An unrelated (and minor) bug from Mark Muranwski fixed. The algorithm

2420

for figuring out where to put temporary files for a "memory:" database

2421

was not working quite right.

2422

</li>

2423

</ul></p><a name="version_1_0_22"></a>

2424

2425

<li>The previous fix was not quite right. This one seems to work better.

2426

</li>

2427

</ul></p><a name="version_1_0_21"></a>

2428

2429

<li>The UPDATE statement was not working when the WHERE clause contained

2430

some terms that could be satisfied using indices and other terms that

2431

could not. Fixed.</li>

2432

</ul></p><a name="version_1_0_20"></a>

2433

2434

<li>Merge development changes into the main trunk. Future work toward

2435

using a BTree file structure will use a separate CVS source tree. This

2436

CVS tree will continue to support the GDBM version of SQLite only.</li>

2437

</ul></p><a name="version_1_0_19"></a>

2438

2439

<li>Fix a strange (but valid) C declaration that was causing problems

2440

for QNX. No logical changes.</li>

2441

</ul></p><a name="version_1_0_18"></a>

2442

2443

<li>Print the offending SQL statement when an error occurs.</li>

2444

<li>Do not require commas between constraints in CREATE TABLE statements.</li>

2445

<li>Added the "-echo" option to the shell.</li>

2446

<li>Changes to comments.</li>

2447

</ul></p><a name="version_1_0_17"></a>

2448

2449

<li>Rewrote <b>sqlite_complete()</b> to make it faster.</li>

2450

<li>Minor tweaks to other code to make it run a little faster.</li>

2451

<li>Added new tests for <b>sqlite_complete()</b> and for memory leaks.</li>

2452

</ul></p><a name="version_1_0_16"></a>

2453

2454

<li>Documentation updates. Mostly fixing of typos and spelling errors.</li>

2455

</ul></p><a name="version_1_0_15"></a>

2456

2457

<li>Documentation updates</li>

2458

<li>Some sanity checking code was removed from the inner loop of vdbe.c

2459

to help the library to run a little faster. The code is only

2460

removed if you compile with -DNDEBUG.</li>

2461

</ul></p><a name="version_1_0_14"></a>

2462

2463

<li>Added a "memory:" backend driver that stores its database in an

2464

in-memory hash table.</li>

2465

</ul></p><a name="version_1_0_13"></a>

2466

2467

<li>Break out the GDBM driver into a separate file in anticipation

2468

to added new drivers.</li>

2469

<li>Allow the name of a database to be prefixed by the driver type.

2470

For now, the only driver type is "gdbm:".</li>

2471

</ul></p><a name="version_1_0_12"></a>

2472

2473

<li>Fixed an off-by-one error that was causing a coredump in

2474

the '%q' format directive of the new

2475

<b>sqlite_..._printf()</b> routines.</li>

2476

<li>Added the <b>sqlite_interrupt()</b> interface.</li>

2477

<li>In the shell, <b>sqlite_interrupt()</b> is invoked when the

2478

user presses Control-C</li>

2479

<li>Fixed some instances where <b>sqlite_exec()</b> was

2480

returning the wrong error code.</li>

2481

</ul></p><a name="version_1_0_10"></a>

2482

2483

<li>Added notes on how to compile for Windows95/98.</li>

2484

<li>Removed a few variables that were not being used. Etc.</li>

2485

</ul></p><a name="version_1_0_9"></a>

2486

2487

<li>Added the <b>sqlite_..._printf()</b> interface routines.</li>

2488

<li>Modified the <b>sqlite</b> shell program to use the new interface

2489

routines.</li>

2490

<li>Modified the <b>sqlite</b> shell program to print the schema for

2491

the built-in SQLITE_MASTER table, if explicitly requested.</li>

2492

</ul></p><a name="version_1_0_8"></a>

2493

2494

<li>Begin writing documentation on the TCL interface.</li>

2495

</ul></p><h3>2000 Sep 29 (Not Released)</h3><p><ul>

2496

<li>Added the <b>sqlite_get_table()</b> API</li>

2497

<li>Updated the documentation for due to the above change.</li>

2498

<li>Modified the <b>sqlite</b> shell to make use of the new

2499

sqlite_get_table() API in order to print a list of tables

2500

in multiple columns, similar to the way "ls" prints filenames.</li>

2501

<li>Modified the <b>sqlite</b> shell to print a semicolon at the

2502

end of each CREATE statement in the output of the ".schema" command.</li>

2503

</ul></p><h3>2000 Sep 21 (Not Released)</h3><p><ul>

2504

<li>Change the tclsqlite "eval" method to return a list of results if

2505

no callback script is specified.</li>

2506

<li>Change tclsqlite.c to use the Tcl_Obj interface</li>

2507

<li>Add tclsqlite.c to the libsqlite.a library</li>

2508

</ul></p><h3>2000 Sep 13 (Version 1.0.5)</h3><p><ul>

2509

<li>Changed the print format for floating point values from "%g" to "%.15g".

2510

</li>

2511

<li>Changed the comparison function so that numbers in exponential notation

2512

(ex: 1.234e+05) sort in numerical order.</li>

2513

</ul></p><h3>2000 Aug 28 (Version 1.0.4)</h3><p><ul>

2514

<li>Added functions <b>length()</b> and <b>substr()</b>.</li>

2515

<li>Fix a bug in the <b>sqlite</b> shell program that was causing

2516

a coredump when the output mode was "column" and the first row

2517

of data contained a NULL.</li>

2518

</ul></p><h3>2000 Aug 22 (Version 1.0.3)</h3><p><ul>

2519

<li>In the sqlite shell, print the "Database opened READ ONLY" message

2520

to stderr instead of stdout.</li>

2521

<li>In the sqlite shell, now print the version number on initial startup.</li>

2522

<li>Add the <b>sqlite_version[]</b> string constant to the library</li>

2523

<li>Makefile updates</li>

2524

<li>Bug fix: incorrect VDBE code was being generated for the following

2525

circumstance: a query on an indexed table containing a WHERE clause with

2526

an IN operator that had a subquery on its right-hand side.</li>

2527

</ul></p><h3>2000 Aug 18 (Version 1.0.1)</h3><p><ul>

2528

<li>Fix a bug in the configure script.</li>

2529

<li>Minor revisions to the website.</li>

2530

</ul></p><h3>2000 Aug 17 (Version 1.0)</h3><p><ul>

2531

<li>Change the <b>sqlite</b> program so that it can read

2532

databases for which it lacks write permission. (It used to

2533

refuse all access if it could not write.)</li>

2534

</ul></p><h3>2000 Aug 9</h3><p><ul>

2535

<li>Treat carriage returns as white space.</li>

2536

</ul></p><h3>2000 Aug 8</h3><p><ul>

2537

<li>Added pattern matching to the ".table" command in the "sqlite"

2538

command shell.</li>

2539

</ul></p><h3>2000 Aug 4</h3><p><ul>

2540

<li>Documentation updates</li>

2541

<li>Added "busy" and "timeout" methods to the Tcl interface</li>

2542

</ul></p><h3>2000 Aug 3</h3><p><ul>

2543

<li>File format version number was being stored in sqlite_master.tcl

2544

multiple times. This was harmless, but unnecessary. It is now fixed.</li>

2545

</ul></p><h3>2000 Aug 2</h3><p><ul>

2546

<li>The file format for indices was changed slightly in order to work

2547

around an inefficiency that can sometimes come up with GDBM when

2548

there are large indices having many entries with the same key.

2549

<font color="red">** Incompatible Change **</font></li>

2550

</ul></p><h3>2000 Aug 1</h3><p><ul>

2551

<li>The parser's stack was overflowing on a very long UPDATE statement.

2552

This is now fixed.</li>

2553

</ul></p><h3>2000 July 31</h3><p><ul>

2554

<li>Finish the <a href="vdbe.html">VDBE tutorial</a>.</li>

2555

<li>Added documentation on compiling to WinNT.</li>

2556

<li>Fix a configuration program for WinNT.</li>

2557

<li>Fix a configuration problem for HPUX.</li>

2558

</ul></p><h3>2000 July 29</h3><p><ul>

2559

<li>Better labels on column names of the result.</li>

2560

</ul></p><h3>2000 July 28</h3><p><ul>

2561

<li>Added the <b>sqlite_busy_handler()</b>

2562

and <b>sqlite_busy_timeout()</b> interface.</li>

2563

</ul></p><h3>2000 June 23</h3><p><ul>

2564

<li>Begin writing the <a href="vdbe.html">VDBE tutorial</a>.</li>

2565

</ul></p><h3>2000 June 21</h3><p><ul>

2566

<li>Clean up comments and variable names. Changes to documentation.

2567

No functional changes to the code.</li>

2568

</ul></p><h3>2000 June 19</h3><p><ul>

2569

<li>Column names in UPDATE statements were case sensitive.

2570

This mistake has now been fixed.</li>

2571

</ul></p><h3>2000 June 16</h3><p><ul>

2572

<li>Added the concatenate string operator (||)</li>

2573

</ul></p><h3>2000 June 12</h3><p><ul>

2574

<li>Added the fcnt() function to the SQL interpreter. The fcnt() function

2575

returns the number of database "Fetch" operations that have occurred.

2576

This function is designed for use in test scripts to verify that

2577

queries are efficient and appropriately optimized. Fcnt() has no other

2578

useful purpose, as far as I know.</li>

2579

<li>Added a bunch more tests that take advantage of the new fcnt() function.

2580

The new tests did not uncover any new problems.</li>

2581

</ul></p><h3>2000 June 8</h3><p><ul>

2582

<li>Added lots of new test cases</li>

2583

<li>Fix a few bugs discovered while adding test cases</li>

2584

<li>Begin adding lots of new documentation</li>

2585

</ul></p><h3>2000 June 6</h3><p><ul>

2586

<li>Added compound select operators: <B>UNION</b>, <b>UNION ALL</B>,

2587

<b>INTERSECT</b>, and <b>EXCEPT</b></li>

2588

<li>Added support for using <b>(SELECT ...)</b> within expressions</li>

2589

<li>Added support for <b>IN</b> and <b>BETWEEN</b> operators</li>

2590

<li>Added support for <b>GROUP BY</b> and <b>HAVING</b></li>

2591

<li>NULL values are now reported to the callback as a NULL pointer

2592

rather than an empty string.</li>

2593

</ul></p><h3>2000 June 3</h3><p><ul>

2594

<li>Added support for default values on columns of a table.</li>

2595

<li>Improved test coverage. Fixed a few obscure bugs found by the

2596

improved tests.</li>

2597

</ul></p><h3>2000 June 2</h3><p><ul>

2598

<li>All database files to be modified by an UPDATE, INSERT or DELETE are

2599

now locked before any changes are made to any files.

2600

This makes it safe (I think) to access

2601

the same database simultaneously from multiple processes.</li>

2602

<li>The code appears stable so we are now calling it "beta".</li>

2603

</ul></p><h3>2000 June 1</h3><p><ul>

2604

<li>Better support for file locking so that two or more processes

2605

(or threads)

2606

can access the same database simultaneously. More work needed in

2607

this area, though.</li>

2608

</ul></p><h3>2000 May 31</h3><p><ul>

2609

<li>Added support for aggregate functions (Ex: <b>COUNT(*)</b>, <b>MIN(...)</b>)

2610

to the SELECT statement.</li>

2611

<li>Added support for <B>SELECT DISTINCT ...</B></li>

2612

</ul></p><h3>2000 May 30</h3><p><ul>

2613

<li>Added the <b>LIKE</b> operator.</li>

2614

<li>Added a <b>GLOB</b> operator: similar to <B>LIKE</B>

2615

but it uses Unix shell globbing wildcards instead of the '%'

2616

and '_' wildcards of SQL.</li>

2617

<li>Added the <B>COPY</b> command patterned after

2618

<a href="http://www.postgresql.org/">PostgreSQL</a> so that SQLite

2619

can now read the output of the <b>pg_dump</b> database dump utility

2620

of PostgreSQL.</li>

2621

<li>Added a <B>VACUUM</B> command that calls the

2622

<b>gdbm_reorganize()</b> function on the underlying database

2623

files.</li>

2624

<li>And many, many bug fixes...</li>

2625

</ul></p><h3>2000 May 29</h3><p><ul>

2626

<li>Initial Public Release of Alpha code</li>

2627

</ul></p>

2628

</dl>

2629