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+<!DOCTYPE html>
+<html><head>
+<meta name="viewport" content="width=device-width, initial-scale=1.0">
+<meta http-equiv="content-type" content="text/html; charset=UTF-8">
+<link href="../sqlite.css" rel="stylesheet">
+<title>SQLite Release 3.34.1 On 2021-01-20</title>
+<!-- path=../ -->
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+<body>
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+<a href="../index.html">
+<img class="logo" src="../images/sqlite370_banner.gif" alt="SQLite" border="0">
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+Small. Fast. Reliable.<br>Choose any three.
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+<li class='mobileonly'><a href="javascript:void(0)" onclick='toggle_div("submenu")'>Menu</a>
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+<li class='desktoponly'><a href="../prosupport.html">Purchase</a>
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+<a href="javascript:void(0)" onclick='toggle_search()'>Search</a>
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+<h2>SQLite Release 3.34.1 On 2021-01-20</h2><p><b>Prior changes from version 3.34.0 (2020-12-01):</b></p>
+<p><ol class='lessindent'>
+<li value='1'> Added the <a href="../c3ref/txn_state.html">sqlite3_txn_state()</a> interface for reporting on the current
+ transaction state of the database connection.
+<li> Enhance <a href="../lang_with.html#recursivecte">recursive common table expressions</a> to support two or more
+ recursive terms as is done by SQL Server, since this helps make
+ <a href="../lang_with.html#rcex3">queries against graphs</a> easier to write and faster to execute.
+<li> Improved error messages on <a href="../lang_createtable.html#ckconst">CHECK constraint</a> failures.
+<li> <a href="../cli.html">CLI</a> enhancements:
+ <ol type="a">
+ <li> The <a href="../cli.html#dotread">.read</a> dot-command now accepts a pipeline in addition to
+ a filename.
+ <li> Added options --data-only and --nosys to the <a href="../cli.html#dump">.dump</a> dot-command.
+ <li> Added the --nosys option to the <a href="../cli.html#dschema">.schema</a> dot-command.
+ <li> Table name quoting works correctly for the <a href="../cli.html#csv">.import</a> dot-command.
+ <li> The <a href="../series.html">generate_series(START,END,STEP)</a> table-valued function
+ extension is now built into the CLI.
+ <li> The <a href="../cli.html#dotdatabases">.databases</a> dot-command now shows the status of each database
+ file as determined by <a href="../c3ref/db_readonly.html">sqlite3_db_readonly()</a> and
+ <a href="../c3ref/txn_state.html">sqlite3_txn_state()</a>.
+ <li> Added the --tabs command-line option that sets
+ <a href="../cli.html#dotmode">.mode tabs</a>.
+ <li> The --init option reports an error if the file named as its argument
+ cannot be opened. The --init option also now honors the --bail option.
+ </ol>
+<li> Query planner improvements:
+ <ol type="a">
+ <li> Improved estimates for the cost of running a DISTINCT operator.
+ <li> When doing an UPDATE or DELETE using a multi-column index where
+ only a few of the earlier columns of the index are useful for the
+ index lookup, postpone doing the main table seek until after all
+ WHERE clause constraints have been evaluated, in case those
+ constraints can be covered by unused later terms of the index,
+ thus avoiding unnecessary main table seeks.
+ <li> The new OP_SeekScan opcode is used to improve performance of
+ multi-column index look-ups when later columns are constrained
+ by an IN operator.
+ </ol>
+<li> The <a href="../lang_transaction.html#immediate">BEGIN IMMEDIATE</a> and <a href="../lang_transaction.html#immediate">BEGIN EXCLUSIVE</a> commands now work even
+ if one or more attached database files are read-only.
+<li> Enhanced <a href="../fts5.html">FTS5</a> to support <a href="../fts5.html#trigramidx">trigram indexes</a>.
+<li> Improved performance of <a href="../wal.html">WAL mode</a> locking primitives in cases where
+ there are hundreds of connections all accessing the same database file
+ at once.
+<li> Enhanced the <a href="../carray.html">carray() table-valued function</a> to include a single-argument
+ form that is bound using the auxiliary <a href="../carray.html#onearg">sqlite3_carray_bind()</a> interface.
+<li> The <a href="../lang_corefunc.html#substr">substr() SQL function</a> can now also be called "substring()" for
+ compatibility with SQL Server.
+<li> The <a href="../syntaxdiagrams.html">syntax diagrams</a> are now implemented as
+ <a href='https://pikchr.org/'>Pikchr</a> scripts and rendered
+ as SVG for improved legibility and ease of maintenance.
+</ol>
+<p><b>Changes in this specific patch release, version 3.34.1 (2021-01-20):</b></p>
+<p><ol class='lessindent'>
+<li value='12'> Fix a potential use-after-free bug when processing a a subquery with both
+ a correlated WHERE clause and a "HAVING 0" clause and where the parent
+ query is an aggregate.
+<li> Fix documentation typos
+<li> Fix minor problems in extensions.
+<p><b>Hashes:</b>
+<li>SQLITE_SOURCE_ID: 2021-01-20 14:10:07 10e20c0b43500cfb9bbc0eaa061c57514f715d87238f4d835880cd846b9ebd1f
+<li>SHA3-256 for sqlite3.c: 799a7be90651fc7296113b641a70b028c142d767b25af1d0a78f93dcf1a2bf20
+
+</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>
+
+