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<h2>SQLite Release 3.7.12 On 2012-05-14</h2><p><ol class='lessindent'>
<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>.
<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
unnecessary reading of database content from disk.
<li>Add the <a href="../fts3.html#*fts4mergecmd">FTS4 "merge" command</a>, the <a href="../fts3.html#*fts4automergecmd">FTS4 "automerge" command</a>, and
the <a href="../fts3.html#*fts4ickcmd">FTS4 "integrity-check" command</a>.
<li>Report the name of specific <a href="../lang_createtable.html#ckconst">CHECK</a> constraints that fail.
<li>In the command-line shell, use popen() instead of fopen() if the first
character of the argument to the ".output" command is "|".
<li>Make use of OVERLAPPED in the windows <a href="../vfs.html">VFS</a> to avoid some system calls
and thereby obtain a performance improvement.
<li>More aggressive optimization of the AND operator when one side or the
other is always false.
<li>Improved performance of queries with many OR-connected terms in the
WHERE clause that can all be indexed.
<li>Add the <a href="../compile.html#rtree_int_only">SQLITE_RTREE_INT_ONLY</a> compile-time option to force the
<a href="../rtree.html">R*Tree Extension Module</a> to use integer instead of
floating point values for both storage and computation.
<li>Enhance the <a href="../pragma.html#pragma_integrity_check">PRAGMA integrity_check</a> command to use much less memory when
processing multi-gigabyte databases.
<li>New interfaces added to the test_quota.c add-on module.
<li>Added the ".trace" dot-command to the command-line shell.
<li>Allow virtual table constructors to be invoked recursively.
<li>Improved optimization of ORDER BY clauses on compound queries.
<li>Improved optimization of aggregate subqueries contained within an
aggregate query.
<li>Bug fix: Fix the <a href="../lang_savepoint.html">RELEASE</a> command so that it does not cancel pending
queries. This repairs a problem introduced in 3.7.11.
<li>Bug fix: Do not discard the DISTINCT as superfluous unless a subset of
the result set is subject to a UNIQUE constraint <em>and</em> it none
of the columns in that subset can be NULL.
Ticket <a href="https://www.sqlite.org/src/info/385a5b56b9">385a5b56b9</a>.
<li>Bug fix: Do not optimize away an ORDER BY clause that has the same terms
as a UNIQUE index unless those terms are also NOT NULL.
Ticket <a href="https://www.sqlite.org/src/info/2a5629202f">2a5629202f</a>.
<li>SQLITE_SOURCE_ID:
"2012-05-14 01:41:23 8654aa9540fe9fd210899d83d17f3f407096c004"
<li>SHA1 for sqlite3.c: 57e2104a0f7b3f528e7f6b7a8e553e2357ccd2e1
</ol></p>
<p>A <a href="../changes.html">complete list of SQLite releases</a>
in a single page and a <a href="../chronology.html">chronology</a> are both also available.
A detailed history of every
check-in is available at
<a href="https://www.sqlite.org/src/timeline">
SQLite version control site</a>.</p>
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