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<h2>SQLite Release 3.45.2 On 2024-03-12</h2><p><b>Prior changes from version 3.45.0 (2024-01-15):</b></p>
<p><ol class='lessindent'>
<li value='1'> Added the <a href="../c3ref/c_deterministic.html#sqliteresultsubtype">SQLITE_RESULT_SUBTYPE</a> property for
<a href="../appfunc.html">application-defined SQL functions</a>.
All application defined SQL functions that invokes
<a href="../c3ref/result_subtype.html">sqlite3_result_subtype()</a> must be registered with this new property.
Failure to do so might cause the call to sqlite3_result_subtype() to
behave as a no-op. Compile with <a href="../compile.html#strict_subtype">-DSQLITE_STRICT_SUBTYPE=1</a> to cause an
SQL error to be raised if a function that is not <a href="../c3ref/c_deterministic.html#sqliteresultsubtype">SQLITE_RESULT_SUBTYPE</a>
tries invokes <a href="../c3ref/result_subtype.html">sqlite3_result_subtype()</a>. The use of <a href="../compile.html#strict_subtype">-DSQLITE_STRICT_SUBTYPE=1</a>
is a recommended compile-time option for every application that makes
use of subtypes.
<li> Enhancements to the <a href="../json1.html">JSON SQL functions</a>:
<ol type="a">
<li> All JSON functions are rewritten to use a new internal parse tree
format called <a href="../json1.html#jsonbx">JSONB</a>. The new parse-tree format is serializable
and hence can be stored in the database to avoid unnecessary re-parsing
whenever the JSON value is used.
<li> New versions of JSON-generating functions generate binary JSONB instead
of JSON text.
<li> The <a href="../json1.html#jvalid">json_valid()</a> function adds an optional second argument that
specifies what it means for the first argument to be "well-formed".
</ol>
<li> Add the <a href="../fts5.html#the_tokendata_option">FTS5 tokendata option</a> to the <a href="../fts5.html">FTS5</a> virtual table.
<li> The <a href="../compile.html#direct_overflow_read">SQLITE_DIRECT_OVERFLOW_READ</a> optimization is now enabled by default.
Disable it at compile-time using -DSQLITE_DIRECT_OVERFLOW_READ=0.
<li> Query planner improvements:
<ol type="a">
<li> Do not allow the transitive constraint optimization to trick the
query planner into using a range constraint when a better equality
constraint is available.
(<a href="https://sqlite.org/forum/forumpost/2568d1f6e6">Forum post 2568d1f6e6</a>.)
<li> The query planner now does a better job of disregarding
indexes that <a href="../lang_analyze.html">ANALYZE</a> identifies as low-quality.
(<a href="https://sqlite.org/forum/forumpost/6f0958b03b">Forum post 6f0958b03b</a>.)
</ol>
<li> Increase the default value for <a href="../limits.html#max_page_count">SQLITE_MAX_PAGE_COUNT</a> from 1073741824 to
4294967294.
<li> Enhancements to the <a href="../cli.html">CLI</a>:
<ol type="a">
<li> Improvements to the display of UTF-8 content on Windows
<li> Automatically detect playback of ".dump" scripts and make appropriate
changes to settings such as ".dbconfig defensive off" and
".dbconfig dqs_dll on".
</ol>
</ol>
<p><b>Prior changes from version 3.45.1 (2024-01-30):</b></p>
<p><ol class='lessindent'>
<li value='8'> Restore the <a href="../json1.html#jblobbug">JSON BLOB input bug</a>, and promise to support the anomaly in
subsequent releases, for backward compatibility.
<li> Fix the <a href="../pragma.html#pragma_integrity_check">PRAGMA integrity_check</a> command so that it works on read-only
databases that contain FTS3 and FTS5 tables. This resolves an issue
introduced in <a href="../releaselog/3_44_0.html">version 3.44.0</a> but was undiscovered until after the 3.45.0 release.
<li> Fix issues associated with processing corrupt <a href="../json1.html#jsonbx">JSONB</a> inputs:
<ol type="a">
<li> Prevent exponential runtime when converting a corrupt JSONB into text.
<li> Fix a possible read of one byte past the end of the JSONB blob when converting
a corrupt JSONB into text.
<li> Enhanced testing using <a href="../testing.html#dbsqlfuzz">jfuzz</a> to prevent any future JSONB problems such
as the above.
</ol>
<li> Fix a long-standing bug in which a read of a few bytes past the end of a
memory-mapped segment might occur when accessing a craftily corrupted database
using <a href="../pragma.html#pragma_mmap_size">memory-mapped database</a>.
<li> Fix a long-standing bug in which a NULL pointer dereference might occur in
the <a href="../opcode.html">bytecode engine</a> due to incorrect bytecode being generated for a class
of SQL statements that are deliberately designed to stress the query planner
but which are otherwise pointless.
</ol>
<p><b>Changes in this specific patch release, version 3.45.2 (2024-03-12):</b></p>
<p><ol class='lessindent'>
<li value='13'> Fix an error in <a href="../lang_upsert.html">UPSERT</a>, introduced by enhancement 3a in <a href="../releaselog/3_35_0.html">version 3.35.0</a>
(2021-03-12), that could cause an index to get out-of-sync with its table.
<a href="https://sqlite.org/forum/forumpost/919c6579c8">Forum thread 919c6579c8</a>.
<li> Reduce the scope of the NOT NULL strength reduction optimization that was
added as item 8e in <a href="../releaselog/3_35_0.html">version 3.35.0</a> (2021-03-12). The optimization
was being attempted in some contexts where it did not work, resulting in
incorrect query results.
<a href="https://sqlite.org/forum/forumpost/440f2a2f17">Forum thread 440f2a2f17</a>.
<li> Other trifling corrections and compiler warning fixes that have come up
since the previous patch release. See the
<a href="https://sqlite.org/src/timeline?from=version-3.45.1&to=version-3.45.2&to2=branch-3.45">timeline</a>
for details.
<p><b>Hashes:</b>
<li>SQLITE_SOURCE_ID: "2024-03-12 11:06:23 d8cd6d49b46a395b13955387d05e9e1a2a47e54fb99f3c9b59835bbefad6af77"
<li>SHA3-256 for sqlite3.c: bd76ad2dc9cde151e469e86627a7e8753aa8ef1a6f657c5a80ba48324b53226b
</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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