148 lines
6.3 KiB
HTML
148 lines
6.3 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 3.8.1 On 2013-10-17</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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<li><a href="../index.html">Home</a>
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<h2>SQLite Release 3.8.1 On 2013-10-17</h2><p><ol class='lessindent'>
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<li>Added the <a href="../lang_corefunc.html#unlikely">unlikely()</a> and <a href="../lang_corefunc.html#likelihood">likelihood()</a> SQL functions to be used
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as hints to the query planner.
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<li>Enhancements to the query planner:
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<ol type='a'>
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<li>Take into account the fact WHERE clause terms that cannot be used with indices
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still probably reduce the number of output rows.
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<li>Estimate the sizes of table and index rows and use the smallest applicable B-Tree
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for full scans and "count(*)" operations.
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</ol>
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<li>Added the <a href="../pragma.html#pragma_soft_heap_limit">soft_heap_limit pragma</a>.
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<li>Added support for <a href="../compile.html#enable_stat4">SQLITE_ENABLE_STAT4</a>
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<li>Added support for "sz=NNN" parameters at the end of
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<a href="../fileformat2.html#stat1tab">sqlite_stat1.stat</a> fields
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used to specify the average length in bytes for table and index rows.
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<li>Avoid running foreign-key constraint checks on an UPDATE if none of the
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modified columns are associated with foreign keys.
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<li>Added the <a href="../compile.html#minimum_file_descriptor">SQLITE_MINIMUM_FILE_DESCRIPTOR</a> compile-time option
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<li>Added the win32-longpath VFS on windows, permitting filenames up to 32K
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characters in length.
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<li>The <a href="../lang_datefunc.html">Date And Time Functions</a> are enhanced so that the current time
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(ex: julianday('now')) is always the same for multiple function invocations
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within the same <a href="../c3ref/step.html">sqlite3_step()</a> call.
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<li>Add the "totype.c" extension, implementing the tointeger() and toreal()
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SQL functions.
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<li><a href="../fts3.html#fts4">FTS4</a> queries are better able to make use of docid<$limit constraints to
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limit the amount of I/O required.
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<li>Added the hidden <a href="../fts3.html#f4alid">fts4aux languageid column</a> to the <a href="../fts3.html#fts4aux">fts4aux</a> virtual table.
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<li>The <a href="../lang_vacuum.html">VACUUM</a> command packs the database about 1% tighter.
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<li>The sqlite3_analyzer utility program is updated to provide better descriptions
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and to compute a more accurate estimate for "Non-sequential pages"
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<li>Refactor the implementation of PRAGMA statements to improve parsing performance.
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<li>The directory used to hold temporary files on unix can now be set using
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the SQLITE_TMPDIR environment variable, which takes precedence over the
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TMPDIR environment variable. The <a href="../c3ref/temp_directory.html">sqlite3_temp_directory</a> global variable
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still has higher precedence than both environment variables, however.
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<li>Added the <a href="../pragma.html#pragma_stats">PRAGMA stats</a> statement.
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<li><b>Bug fix:</b> Return the correct answer for "SELECT count(*) FROM table" even if
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there is a <a href="../partialindex.html">partial index</a> on the table. Ticket
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<a href="http://www.sqlite.org/src/info/a5c8ed66ca">a5c8ed66ca</a>.
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<li>SQLITE_SOURCE_ID:
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"2013-10-17 12:57:35 c78be6d786c19073b3a6730dfe3fb1be54f5657a"
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<li>SHA1 for sqlite3.c: 0a54d76566728c2ba96292a49b138e4f69a7c391
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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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