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<h2>SQLite Release 3.43.1 On 2023-09-11</h2><p><b>Prior changes from version 3.43.0 (2023-08-24):</b></p>
<p><ol class='lessindent'>
<li value='1'> Add support for <a href="../fts5.html#clssdeltab">Contentless-Delete FTS5 Indexes</a>. This is a variety
of <a href="../fts5.html">FTS5</a> full-text search index that omits storing the content that is being indexed
while also allowing records to be deleted.
<li> Enhancements to the <a href="../lang_datefunc.html">date and time functions</a>:
<ol type="a">
<li> Added new <a href="../lang_datefunc.html#tmshf">time shift modifiers</a> of the form <tt>±YYYY-MM-DD HH:MM:SS.SSS</tt>.
<li> Added the <a href="../lang_datefunc.html#tmdif">timediff() SQL function</a>.
</ol>
<li> Added the <a href="../lang_corefunc.html#octet_length">octet_length(X)</a> SQL function.
<li> Added the <a href="../c3ref/stmt_explain.html">sqlite3_stmt_explain()</a> API.
<li> Query planner enhancements:
<ol type="a">
<li> Generalize the LEFT JOIN strength reduction optimization so that it works
for RIGHT and FULL JOINs as well. Rename it to
<a href="../optoverview.html#leftjoinreduction">OUTER JOIN strength reduction</a>.
<li> Enhance the theorem prover in the <a href="../optoverview.html#leftjoinreduction">OUTER JOIN strength reduction</a> optimization
so that it returns fewer false-negatives.
</ol>
<li> Enhancements to the <a href="../floatingpoint.html#decext">decimal extension</a>:
<ol type="a">
<li> New function decimal_pow2(N) returns the N-th power of 2 for integer N
between -20000 and +20000.
<li> New function decimal_exp(X) works like decimal(X) except that it returns
the result in exponential notation - with a "e+NN" at the end.
<li> If X is a floating-point value, then the decimal(X) function now does a full
expansion of that value into its exact decimal equivalent.
</ol>
<li> Performance enhancements to <a href="../json1.html">JSON processing</a> results in a 2x performance
improvement for some kinds of processing on large JSON strings.
<li> New makefile target "verify-source" checks to ensure that there are no
unintentional changes in the source tree. (Works for
<a href="../getthecode.html">canonical source code</a> only -
not for <a href="../amalgamation.html#amalgtarball">precompiled amalgamation tarballs</a>.)
<li> Added the <a href="../compile.html#use_seh">SQLITE_USE_SEH</a> compile-time option that enables Structured
Exception Handling on Windows while working with the memory-mapped
<a href="../walformat.html#shm">shm file</a> that is part of <a href="../wal.html">WAL mode</a> processing. This option is enabled
by default when building on Windows using Makefile.msc.
<li> The <a href="../vfs.html">VFS</a> for unix now assumes that the nanosleep() system call is
available unless compiled with -DHAVE_NANOSLEEP=0.
</ol>
<p><b>Changes in this specific patch release, version 3.43.1 (2023-09-11):</b></p>
<p><ol class='lessindent'>
<li value='11'> Fix a regression in the way that the <a href="../lang_aggfunc.html#sumunc">sum()</a>, <a href="../lang_aggfunc.html#avg">avg()</a>, and <a href="../lang_aggfunc.html#sumunc">total()</a>
aggregate functions handle infinities.
<li> Fix a bug in the <a href="../json1.html#jarraylen">json_array_length()</a> function that occurs when the
argument comes directly from <a href="../json1.html#jrm">json_remove()</a>.
<li> Fix the omit-unused-subquery-columns optimization (introduced in
in version 3.42.0) so that it works correctly if the subquery is a
compound where one arm is DISTINCT and the other is not.
<li> Other minor fixes.
<p><b>Hashes:</b>
<li>SQLITE_SOURCE_ID: 2023-09-11 12:01:27 2d3a40c05c49e1a49264912b1a05bc2143ac0e7c3df588276ce80a4cbc9bd1b0
<li>SHA3-256 for sqlite3.c: 391af0a4755e31ae8b29776a4a060b678823ffe4c4db558567567c688a578589
</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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