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<h2>SQLite Release 3.46.1 On 2024-08-13</h2><p><b>Prior changes from version 3.46.0 (2024-05-23):</b></p>
<p><ol class='lessindent'>
<li value='1'> Enhance <a href="../pragma.html#pragma_optimize">PRAGMA optimize</a> in multiple ways, to make it
<a href="../lang_analyze.html#pragopt">simpler to use</a>:
<ol type="a">
<li> PRAGMA optimize automatically implements a temporary
<a href="../pragma.html#pragma_analysis_limit">analysis limit</a> to prevent excess runtime
on large databases.
<li> Added the new 0x10000 bitmask option to check for updates on all tables.
<li> Automatically re-analyze tables that do not have sqlite_stat1 entries.
</ol>
<li> Enhancements to the <a href="../lang_datefunc.html">date and time functions</a>:
<ol type="a">
<li> The <a href="../lang_datefunc.html#strftm">strftime() SQL function</a> now supports %G, %g, %U, and %V.
<li> New modifiers 'ceiling' and 'floor' control the algorithm used to
resolve <a href="../lang_datefunc.html#dtambg">ambiguous dates</a> when shifting a date by an integer number
of months and/or years.
<li> The <a href="../lang_datefunc.html#localtime">'utc' and 'localtime' modifiers</a> are now no-ops if SQLite knows
that the time is already in UTC or in the localtime, respectively.
</ol>
<li> Add support for underscore ("_") characters between digits in
<a href="../lang_expr.html#litvalue">numeric literals</a>.
<li> Add the <a href="../json1.html#jpretty">json_pretty()</a> SQL function.
<li> Query planner improvements:
<ol type="a">
<li> The "VALUES-as-coroutine" optimization enables INSERT statements with
thousands of rows in the VALUES clause to parse and run in about half
the time and using about half as much memory.
<li> Allow the use of an index for queries like "SELECT count(DISTINCT col) FROM ...",
even if the index records are not smaller than the table records.
<li> Improved recognition of cases where the value of an SQL function is
constant because all its arguments are constant.
<li> Enhance the <a href="../optoverview.html#pushdown">WHERE-clause push-down optimization</a> so that it is able to
push down WHERE clause terms containing uncorrelated subqueries.
</ol>
<li> Allocate additional memory from the heap for the SQL parser stack if
that stack overflows, rather than reporting a "parser stack overflow" error.
<li> JSON changes:
<ol type="a">
<li> Allow ASCII control characters within JSON5 string literals.
<li> Fix <a href="../json1.html#jptr">the -> and ->> operators</a> so that when the right-hand side operand is a string
that looks like an integer it is still treated as a string, because that is what
PostgreSQL does.
</ol>
<li> Allow large hexadecimal literals to be used as the DEFAULT value to a table column.
</ol>
<p><b>Changes in this specific patch release, version 3.46.1 (2024-08-13):</b></p>
<p><ol class='lessindent'>
<li value='9'> Improved robustness while parsing the <a href="../fts5.html#tokenizers">tokenize= arguments</a> in <a href="../fts5.html">FTS5</a>.
<a href="https://sqlite.org/forum/forumpost/171bcc2bcd">Forum post 171bcc2bcd</a>.
<li> Enhancements to <a href="../queryplanner.html#covidx">covering index</a> prediction in the query planner.
Add early detection of over-prediction of covering indexes so that
<a href="../c3ref/prepare.html">sqlite3_prepare()</a> will return an error rather than just generate bad bytecode.
<a href="https://sqlite.org/forum/forumpost/e60e4c295d22f8ce">Forum post e60e4c295d22f8ce</a>.
<li> Do not let the number of terms on a <a href="../lang_select.html#values">VALUES clause</a> be limited by
<a href="../c3ref/c_limit_attached.html#sqlitelimitcompoundselect">SQLITE_LIMIT_COMPOUND_SELECT</a>, even if the VALUES clause contains
elements that appear to be variables due to
<a href="../quirks.html#dblquote">double-quoted string literals</a>.
<li> Fix the <a href="../windowfunctions.html">window function</a> version of <a href="../lang_aggfunc.html#group_concat">group_concat()</a> so that it returns
an empty string if it has one or more empty string inputs.
<li> In <a href="../fts5.html#the_secure_delete_configuration_option">FTS5 secure-delete mode</a>, fix false-positive
integrity-check reports about corrupt indexes.
<li> Syntax errors in <a href="../lang_altertable.html">ALTER TABLE</a> should always return <a href="../rescode.html#error">SQLITE_ERROR</a>. In
some cases, they were formerly returning <a href="../rescode.html#internal">SQLITE_INTERNAL</a>.
<li> JavaScript/WASM:
<ol type="a">
<li> Fix a corruption-causing bug in the JavaScript "opfs" VFS.
<li> Work around a couple of browser-specific OPFS quirks.
</ol>
<li> Other minor fixes.
<p><b>Hashes:</b>
<li>SQLITE_SOURCE_ID: 2024-08-13 09:16:08 c9c2ab54ba1f5f46360f1b4f35d849cd3f080e6fc2b6c60e91b16c63f69a1e33
<li>SHA3-256 for sqlite3.c: 186a1baa476b6d546de155160ca6d30ff7b7e6ee375f0bb6445e1a3d180a7dad
</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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