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<a href="intro.html"><h2>SQLite C Interface</h2></a><h2>Checkpoint a database</h2><blockquote><pre>int sqlite3_wal_checkpoint(sqlite3 *db, const char *zDb);
</pre></blockquote><p>
The <a href="../c3ref/wal_checkpoint.html">sqlite3_wal_checkpoint(D,X)</a> interface causes database named X
on <a href="../c3ref/sqlite3.html">database connection</a> D to be <a href="../wal.html#ckpt">checkpointed</a>. If X is NULL or an
empty string, then a checkpoint is run on all databases of
connection D. If the database connection D is not in
<a href="../wal.html">write-ahead log mode</a> then this interface is a harmless no-op.
The <a href="../c3ref/wal_checkpoint.html">sqlite3_wal_checkpoint(D,X)</a> interface initiates a
<a href="../c3ref/wal_checkpoint_v2.html">PASSIVE</a> checkpoint.
Use the <a href="../c3ref/wal_checkpoint_v2.html">sqlite3_wal_checkpoint_v2()</a> interface to get a FULL
or RESET checkpoint.</p>
<p>The <a href="../pragma.html#pragma_wal_checkpoint">wal_checkpoint pragma</a> can be used to invoke this interface
from SQL. The <a href="../c3ref/wal_autocheckpoint.html">sqlite3_wal_autocheckpoint()</a> interface and the
<a href="../pragma.html#pragma_wal_autocheckpoint">wal_autocheckpoint pragma</a> can be used to cause this interface to be
run whenever the WAL reaches a certain size threshold.</p>
<p>See also: <a href="../c3ref/wal_checkpoint_v2.html">sqlite3_wal_checkpoint_v2()</a>
</p><p>See also lists of
<a href="objlist.html">Objects</a>,
<a href="constlist.html">Constants</a>, and
<a href="funclist.html">Functions</a>.</p>
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