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<h2>SQLite Release 3.16.2 On 2017-01-06</h2><p><b>Changes in version 3.16.0 (2017-01-02):</b></p>
<p><ol class='lessindent'>
<li value='1'>Uses 9% fewer CPU cycles. (See the <a href="../cpu.html">CPU performance measurement</a> report for
details on how this performance increase was computed.)
<li>Added experimental support for <a href="../pragma.html#pragfunc">PRAGMA functions</a>.
<li>Added the <a href="../c3ref/c_dbconfig_defensive.html#sqlitedbconfignockptonclose">SQLITE_DBCONFIG_NO_CKPT_ON_CLOSE</a> option to <a href="../c3ref/db_config.html">sqlite3_db_config()</a>.
<li>Enhance the <a href="../lang_datefunc.html">date and time functions</a> so that the 'unixepoch' modifier works
for the full span of supported dates.
<li>Changed the default configuration of the <a href="../malloc.html#lookaside">lookaside memory allocator</a> from
500 slots of 128 bytes each into 125 slots of 512 bytes each.
<li>Enhanced "WHERE x NOT NULL" <a href="../partialindex.html">partial indexes</a> so that they are usable if
the "x" column appears in a LIKE or GLOB operator.
<li>Enhanced <a href="../c3ref/interrupt.html">sqlite3_interrupt()</a> so that it interrupts <a href="../wal.html#ckpt">checkpoint</a> operations that
are in process.
<li>Enhanced the <a href="../lang_expr.html#like">LIKE</a> and <a href="../lang_expr.html#glob">GLOB</a> matching algorithm to be faster
for cases when the pattern contains multiple wildcards.
<li>Added the <a href="../c3ref/c_fcntl_begin_atomic_write.html#sqlitefcntlwin32gethandle">SQLITE_FCNTL_WIN32_GET_HANDLE</a> file control opcode.
<li>Added ".mode quote" to the <a href="../cli.html">command-line shell</a>.
<li>Added ".lint fkey-indexes" to the <a href="../cli.html">command-line shell</a>.
<li>Added the <a href="../imposter.html#dotimposter">.imposter dot-command</a> to the <a href="../cli.html">command-line shell</a>.
<li>Added the <a href="https://www.sqlite.org/src/file/ext/misc/remember.c">remember(V,PTR)</a>
SQL function as a <a href="../loadext.html">loadable extension</a>.
<li>Rename the <a href="../compile.html#omit_builtin_test">SQLITE_OMIT_BUILTIN_TEST</a> compile-time option to
<a href="../compile.html#untestable">SQLITE_UNTESTABLE</a> to better reflect the implications of using it.
<p><b>Bug Fixes:</b>
<li>Fix a long-standing bug in the query planner that caused incorrect results
on a LEFT JOIN where the left-hand table is a subquery and the join constraint
is a bare column name coming from the left-hand subquery. Ticket
<a href="https://www.sqlite.org/src/info/2df0107b">2df0107b</a>.
<li>Correctly handle the integer literal -0x8000000000000000 in the query planner.
</ol>
<p><b>Additional changes in version 3.16.1 (2017-01-03):</b></p>
<p><ol class='lessindent'>
<li value='17'>Fix a bug concerning the use of <a href="../rowvalue.html">row values</a> within <a href="../lang_createtrigger.html">triggers</a>
(see ticket <a href="https://www.sqlite.org/src/info/8c9458e7">8c9458e7</a>)
that was in version 3.15.0 but was not reported until moments after the 3.16.0
release was published.
</ol>
<p><b>Additional changes in version 3.16.2 (2017-01-06):</b></p>
<p><ol class='lessindent'>
<li value='18'>Fix the <a href="../lang_replace.html">REPLACE</a> statement for
<a href="../withoutrowid.html">WITHOUT ROWID</a> tables that lack secondary indexes so that
it works correctly with triggers and foreign keys. This was a new bug
caused by performance optimizations added in version 3.16.0.
Ticket <a href="https://www.sqlite.org/src/info/30027b613b4">30027b613b4</a>
<li>Fix the <a href="../c3ref/value_blob.html">sqlite3_value_text()</a> interface so that it correctly
translates content generated by <a href="../lang_corefunc.html#zeroblob">zeroblob()</a> into a string of all
0x00 characters. This is a long-standing issue discovered after the
3.16.1 release by <a href="https://github.com/google/oss-fuzz">OSS-Fuzz</a>
<li>Fix the bytecode generator to deal with a subquery in the FROM clause
that is itself a UNION ALL where one side of the UNION ALL is a view
that contains an ORDER BY. This is a long-standing issue that was
discovered after the release of 3.16.1. See ticket
<a href="https://www.sqlite.org/src/info/190c2507">190c2507</a>.
<li>Adjust the <a href="../c3ref/column_count.html">sqlite3_column_count()</a> API so it more often returns the same
values for <a href="../pragma.html#syntax">PRAGMA</a> statements as it did in prior releases, to
minimize disruption to applications that might be using that
interface in unexpected ways.
<p><b>Hashes:</b>
<li>SQLITE_SOURCE_ID: "2017-01-06 16:32:41 a65a62893ca8319e89e48b8a38cf8a59c69a8209"
<li>SHA1 for sqlite3.c: 2bebdc3f24911c0d12b6d6c0123c3f84d6946b08
</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="http://www.sqlite.org/src/timeline">
SQLite version control site</a>.</p>
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