173 lines
8.6 KiB
HTML
173 lines
8.6 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 3.28.0 On 2019-04-16</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><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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<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 3.28.0 On 2019-04-16</h2><p><ol class='lessindent'>
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<li> Enhanced <a href="../windowfunctions.html">window functions</a>:
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<ol type="a">
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<li> Add support the <a href="../windowfunctions.html#wexcls">EXCLUDE clause</a>.
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<li> Add support for <a href="../windowfunctions.html#wchaining">window chaining</a>.
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<li> Add support for <a href="../windowfunctions.html#grouptype">GROUPS frames</a>.
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<li> Add support for "<a href="../windowfunctions.html#exprrange"><expr> PRECEDING</a>" and
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"<a href="../windowfunctions.html#exprrange"><expr> FOLLOWING</a>" boundaries
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in RANGE <a href="../windowfunctions.html#framespec">frames</a>.
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</ol>
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<li> Added the new <a href="../c3ref/stmt_isexplain.html">sqlite3_stmt_isexplain(S)</a> interface for determining
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whether or not a <a href="../c3ref/stmt.html">prepared statement</a> is an <a href="../lang_explain.html">EXPLAIN</a>.
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<li> Enhanced <a href="../lang_vacuum.html#vacuuminto">VACUUM INTO</a> so that it works for read-only databases.
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<li> New query optimizations:
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<ol type="a">
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<li> Enable the <a href="../optoverview.html#like_opt">LIKE optimization</a> for cases when the ESCAPE keyword
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is present and <a href="../pragma.html#pragma_case_sensitive_like">PRAGMA case_sensitive_like</a> is on.
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<li> In queries that are driven by a <a href="../partialindex.html">partial index</a>, avoid unnecessary
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tests of the constraint named in the WHERE clause of the partial
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index, since we know that constraint must always be true.
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</ol>
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<li> Enhancements to the <a href="../tclsqlite.html">TCL Interface</a>:
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<ol type="a">
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<li> Added the -returntype option to the <a href="../tclsqlite.html#function">function method</a>.
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<li> Added the new <a href="../tclsqlite.html#bind_fallback">bind_fallback method</a>.
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</ol>
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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> Added support for <a href="../lang_expr.html#varparam">bound parameters</a> and the <a href="../cli.html#param">.parameter command</a>.
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<li> Fix the <a href="../cli.html#fileio">readfile()</a> function so that it returns
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an empty BLOB rather than throwing an out-of-memory error when
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reading an empty file.
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<li> Fix the <a href="../cli.html#fileio">writefile()</a> function so that when it
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creates new directories along the path of a new file, it gives them
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umask permissions rather than the same permissions as the file.
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<li> Change <a href="../cli.html#arinsup">--update option</a> in the <a href="../cli.html#sqlar">.archive command</a> so that it skips
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files that are already in the archive and are unchanged. Add the
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new --insert option that works like --update used to work.
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</ol>
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<li> Added the <a href="https://sqlite.org/src/file/ext/misc/fossildelta.c">fossildelta.c</a>
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extension that can create, apply, and deconstruct the
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<a href="https://fossil-scm.org/fossil/doc/trunk/www/delta_format.wiki">Fossil DVCS file delta format</a>
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that is used by the <a href="../rbu.html">RBU extension</a>.
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<li> Added the <a href="../c3ref/c_dbconfig_defensive.html#sqlitedbconfigwritableschema">SQLITE_DBCONFIG_WRITABLE_SCHEMA</a> verb for the <a href="../c3ref/db_config.html">sqlite3_db_config()</a>
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interface, that does the same work as <a href="../pragma.html#pragma_writable_schema">PRAGMA writable_schema</a> without using the
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SQL parser.
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<li> Added the <a href="../c3ref/value_blob.html">sqlite3_value_frombind()</a> API for determining if the argument
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to an SQL function is from a <a href="../lang_expr.html#varparam">bound parameter</a>.
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<li> Security and compatibilities enhancements to <a href="../fts3.html#f3tknzr">fts3_tokenizer()</a>:
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<ol type="a">
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<li> The <a href="../fts3.html#f3tknzr">fts3_tokenizer()</a> function always returns NULL
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unless either the legacy application-defined FTS3 tokenizers interface
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are enabled using
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the <a href="../c3ref/db_config.html">sqlite3_db_config</a>(<a href="../c3ref/c_dbconfig_defensive.html#sqlitedbconfigenablefts3tokenizer">SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER</a>)
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setting, or unless the first argument to fts3_tokenizer() is a <a href="../lang_expr.html#varparam">bound parameter</a>.
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<li> The two-argument version of <a href="../fts3.html#f3tknzr">fts3_tokenizer()</a> accepts a pointer to the
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tokenizer method object even without
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the <a href="../c3ref/db_config.html">sqlite3_db_config</a>(<a href="../c3ref/c_dbconfig_defensive.html#sqlitedbconfigenablefts3tokenizer">SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER</a>) setting
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if the second argument is a <a href="../lang_expr.html#varparam">bound parameter</a>
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</ol>
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<li> Improved robustness against corrupt database files.
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<li> Miscellaneous performance enhancements
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<li> Established a Git mirror of the offical SQLite source tree.
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The canonical sources for SQLite are maintained using the
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<a href="https://fossil-scm.org/">Fossil DVCS</a> at <a href="https://sqlite.org/src">https://sqlite.org/src</a>.
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The Git mirror can be seen at <a href="https://github.com/sqlite/sqlite">https://github.com/sqlite/sqlite</a>.
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<p><b>Hashes:</b>
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<li>SQLITE_SOURCE_ID: 2019-04-16 19:49:53 884b4b7e502b4e991677b53971277adfaf0a04a284f8e483e2553d0f83156b50
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<li>SHA3-256 for sqlite3.c: 411efca996b65448d9798eb203d6ebe9627b7161a646f5d00911e2902a57b2e9
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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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