157 lines
7.1 KiB
HTML
157 lines
7.1 KiB
HTML
<!DOCTYPE html>
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<html><head>
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<link href="../sqlite.css" rel="stylesheet">
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<title>SQLite Release 3.26.0 On 2018-12-01</title>
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<!-- path=../ -->
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</head>
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<body>
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<div class=nosearch>
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<a href="../index.html">
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<img class="logo" src="../images/sqlite370_banner.gif" alt="SQLite" border="0">
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</a>
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<div><!-- IE hack to prevent disappearing logo --></div>
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<div class="tagline desktoponly">
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Small. Fast. Reliable.<br>Choose any three.
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</div>
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<div class="menu mainmenu">
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<ul>
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<li><a href="../index.html">Home</a>
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<li class='mobileonly'><a href="javascript:void(0)" onclick='toggle_div("submenu")'>Menu</a>
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<li class='wideonly'><a href='../about.html'>About</a>
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<li class='desktoponly'><a href="../docs.html">Documentation</a>
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<li class='desktoponly'><a href="../download.html">Download</a>
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<li class='wideonly'><a href='../copyright.html'>License</a>
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<ul>
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<li><a href='../about.html'>About</a>
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<li><a href='../docs.html'>Documentation</a>
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<li><a href='../download.html'>Download</a>
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<li><a href='../support.html'>Support</a>
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<li><a href='../prosupport.html'>Purchase</a>
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<select name="s" id="searchtype">
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<option value="d">Search Documentation</option>
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<option value="c">Search Changelog</option>
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</div>
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<h2>SQLite Release 3.26.0 On 2018-12-01</h2><p><ol class='lessindent'>
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<li>Optimization: When doing an <a href="../lang_update.html">UPDATE</a> on a table with <a href="../expridx.html">indexes on expressions</a>,
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do not update the expression indexes if they do not refer to any of the columns
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of the table being updated.
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<li>Allow the <a href="../vtab.html#xbestindex">xBestIndex()</a> method of <a href="../vtab.html">virtual table</a> implementations to return
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<a href="../rescode.html#constraint">SQLITE_CONSTRAINT</a> to indicate that the proposed query plan is unusable and
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should not be given further consideration.
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<li>Added the <a href="../c3ref/c_dbconfig_defensive.html#sqlitedbconfigdefensive">SQLITE_DBCONFIG_DEFENSIVE</a> option which disables the ability to
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create corrupt database files using ordinary SQL.
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<li>Added support for read-only <a href="../vtab.html#xshadowname">shadow tables</a> when the <a href="../c3ref/c_dbconfig_defensive.html#sqlitedbconfigdefensive">SQLITE_DBCONFIG_DEFENSIVE</a>
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option is enabled.
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<li>Added the <a href="../pragma.html#pragma_legacy_alter_table">PRAGMA legacy_alter_table</a> command, which if enabled causes the
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<a href="../lang_altertable.html">ALTER TABLE</a> command to behave like older version of SQLite (prior to
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version 3.25.0) for compatibility.
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<li>Added <a href="../pragma.html#pragma_table_xinfo">PRAGMA table_xinfo</a> that works just like <a href="../pragma.html#pragma_table_info">PRAGMA table_info</a>
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except that it also shows <a href="../vtab.html#hiddencol">hidden columns</a> in virtual tables.
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<li>Added the <a href="https://sqlite.org/src/file/ext/misc/explain.c">explain virtual table</a>
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as a run-time loadable extension.
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<li>Add a limit counter to the query planner to prevent excessive
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<a href="../c3ref/prepare.html">sqlite3_prepare()</a> times for certain pathological SQL inputs.
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<li>Added support for the <a href="../c3ref/expanded_sql.html">sqlite3_normalized_sql()</a> interface, when compiling
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with SQLITE_ENABLE_NORMALIZE.
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<li>Enhanced triggers so that they can use <a href="../vtab.html#tabfunc2">table-valued functions</a> that
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exist in schemas other than the schema where the trigger is defined.
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<li>Enhancements to the <a href="../cli.html">CLI</a>:
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<ol type="a">
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<li>Improvements to the ".help" command.
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<li>The SQLITE_HISTORY environment variable, if it exists,
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specifies the name of the command-line editing history file
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<li>The --deserialize option associated with opening a new database cause the
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database file to be read into memory and accessed using the
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<a href="../c3ref/deserialize.html">sqlite3_deserialize()</a> API. This simplifies running tests on a database
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without modifying the file on disk.
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</ol>
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<li>Enhancements to the <a href="../geopoly.html">geopoly</a> extension:
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<ol type="a">
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<li>Always stores polygons
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using the binary format, which is faster and uses less space.
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<li>Added the <a href="../geopoly.html#regpoly">geopoly_regular()</a> function.
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<li>Added the <a href="../geopoly.html#ccw">geopoly_ccw()</a> function.
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</ol>
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<li>Enhancements to the <a href="../sessionintro.html">session</a> extension:
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<ol type="a">
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<li>Added the <a href="../session/c_changesetapply_invert.html">SQLITE_CHANGESETAPPLY_INVERT</a> flag
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<li>Added the <a href="../session/sqlite3changeset_start.html">sqlite3changeset_start_v2()</a> interface and the
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<a href="../session/c_changesetstart_invert.html">SQLITE_CHANGESETSTART_INVERT</a> flag.
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<li>Added the
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<a href="https://sqlite.org/src/file/ext/session/changesetfuzz.c">changesetfuzz.c</a>
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test-case generator utility.
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</ol>
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<p><b>Hashes:</b>
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<li>SQLITE_SOURCE_ID: "2018-12-01 12:34:55 bf8c1b2b7a5960c282e543b9c293686dccff272512d08865f4600fb58238b4f9"
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<li>SHA3-256 for sqlite3.c: 72c08830da9b5d1cb397c612c0e870d7f5eb41a323b41aa3d8aa5ae9ccedb2c4
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</ol></p>
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<p>A <a href="../changes.html">complete list of SQLite releases</a>
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in a single page and a <a href="../chronology.html">chronology</a> are both also available.
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A detailed history of every
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check-in is available at
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<a href="http://www.sqlite.org/src/timeline">
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SQLite version control site</a>.</p>
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