|
- <?xml version="1.0" encoding="UTF-8" standalone="no"?>
- <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>RELEASE SAVEPOINT</title><link rel="stylesheet" type="text/css" href="stylesheet.css" /><link rev="made" href="pgsql-docs@lists.postgresql.org" /><meta name="generator" content="DocBook XSL Stylesheets V1.79.1" /><link rel="prev" href="sql-reindex.html" title="REINDEX" /><link rel="next" href="sql-reset.html" title="RESET" /></head><body><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">RELEASE SAVEPOINT</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="sql-reindex.html" title="REINDEX">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="sql-commands.html" title="SQL Commands">Up</a></td><th width="60%" align="center">SQL Commands</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 12.4 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="sql-reset.html" title="RESET">Next</a></td></tr></table><hr></hr></div><div class="refentry" id="SQL-RELEASE-SAVEPOINT"><div class="titlepage"></div><a id="id-1.9.3.163.1" class="indexterm"></a><a id="id-1.9.3.163.2" class="indexterm"></a><div class="refnamediv"><h2><span class="refentrytitle">RELEASE SAVEPOINT</span></h2><p>RELEASE SAVEPOINT — destroy a previously defined savepoint</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><pre class="synopsis">
- RELEASE [ SAVEPOINT ] <em class="replaceable"><code>savepoint_name</code></em>
- </pre></div><div class="refsect1" id="id-1.9.3.163.6"><h2>Description</h2><p>
- <code class="command">RELEASE SAVEPOINT</code> destroys a savepoint previously defined
- in the current transaction.
- </p><p>
- Destroying a savepoint makes it unavailable as a rollback point,
- but it has no other user visible behavior. It does not undo the
- effects of commands executed after the savepoint was established.
- (To do that, see <a class="xref" href="sql-rollback-to.html" title="ROLLBACK TO SAVEPOINT"><span class="refentrytitle">ROLLBACK TO SAVEPOINT</span></a>.)
- Destroying a savepoint when
- it is no longer needed allows the system to reclaim some resources
- earlier than transaction end.
- </p><p>
- <code class="command">RELEASE SAVEPOINT</code> also destroys all savepoints that were
- established after the named savepoint was established.
- </p></div><div class="refsect1" id="id-1.9.3.163.7"><h2>Parameters</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="replaceable"><code>savepoint_name</code></em></span></dt><dd><p>
- The name of the savepoint to destroy.
- </p></dd></dl></div></div><div class="refsect1" id="id-1.9.3.163.8"><h2>Notes</h2><p>
- Specifying a savepoint name that was not previously defined is an error.
- </p><p>
- It is not possible to release a savepoint when the transaction is in
- an aborted state.
- </p><p>
- If multiple savepoints have the same name, only the one that was most
- recently defined is released.
- </p></div><div class="refsect1" id="id-1.9.3.163.9"><h2>Examples</h2><p>
- To establish and later destroy a savepoint:
- </p><pre class="programlisting">
- BEGIN;
- INSERT INTO table1 VALUES (3);
- SAVEPOINT my_savepoint;
- INSERT INTO table1 VALUES (4);
- RELEASE SAVEPOINT my_savepoint;
- COMMIT;
- </pre><p>
- The above transaction will insert both 3 and 4.
- </p></div><div class="refsect1" id="id-1.9.3.163.10"><h2>Compatibility</h2><p>
- This command conforms to the <acronym class="acronym">SQL</acronym> standard. The standard
- specifies that the key word <code class="literal">SAVEPOINT</code> is
- mandatory, but <span class="productname">PostgreSQL</span> allows it to
- be omitted.
- </p></div><div class="refsect1" id="id-1.9.3.163.11"><h2>See Also</h2><span class="simplelist"><a class="xref" href="sql-begin.html" title="BEGIN"><span class="refentrytitle">BEGIN</span></a>, <a class="xref" href="sql-commit.html" title="COMMIT"><span class="refentrytitle">COMMIT</span></a>, <a class="xref" href="sql-rollback.html" title="ROLLBACK"><span class="refentrytitle">ROLLBACK</span></a>, <a class="xref" href="sql-rollback-to.html" title="ROLLBACK TO SAVEPOINT"><span class="refentrytitle">ROLLBACK TO SAVEPOINT</span></a>, <a class="xref" href="sql-savepoint.html" title="SAVEPOINT"><span class="refentrytitle">SAVEPOINT</span></a></span></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="sql-reindex.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="sql-commands.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="sql-reset.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">REINDEX </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> RESET</td></tr></table></div></body></html>
|
