122 lines
4.4 KiB
HTML
122 lines
4.4 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>Checkpoint a database</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='desktoponly'><a href="../download.html">Download</a>
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window.onbeforeunload = function(e){div_off("submenu");}
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</div>
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<!-- keywords: sqlite3_wal_checkpoint -->
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<div class=nosearch>
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<a href="intro.html"><h2>SQLite C Interface</h2></a>
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<h2>Checkpoint a database</h2>
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</div>
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<blockquote><pre>
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int sqlite3_wal_checkpoint(sqlite3 *db, const char *zDb);
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</pre></blockquote>
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<p>
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The sqlite3_wal_checkpoint(D,X) is equivalent to
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<a href="../c3ref/wal_checkpoint_v2.html">sqlite3_wal_checkpoint_v2</a>(D,X,<a href="../c3ref/c_checkpoint_full.html">SQLITE_CHECKPOINT_PASSIVE</a>,0,0).</p>
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<p>In brief, sqlite3_wal_checkpoint(D,X) causes the content in the
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<a href="../wal.html">write-ahead log</a> for database X on <a href="../c3ref/sqlite3.html">database connection</a> D to be
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transferred into the database file and for the write-ahead log to
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be reset. See the <a href="../wal.html#ckpt">checkpointing</a> documentation for addition
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information.</p>
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<p>This interface used to be the only way to cause a checkpoint to
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occur. But then the newer and more powerful <a href="../c3ref/wal_checkpoint_v2.html">sqlite3_wal_checkpoint_v2()</a>
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interface was added. This interface is retained for backwards
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compatibility and as a convenience for applications that need to manually
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start a callback but which do not need the full power (and corresponding
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complication) of <a href="../c3ref/wal_checkpoint_v2.html">sqlite3_wal_checkpoint_v2()</a>.
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</p><p>See also lists of
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<a href="objlist.html">Objects</a>,
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<a href="constlist.html">Constants</a>, and
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<a href="funclist.html">Functions</a>.</p>
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