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<!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>ALTER OPERATOR</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 Vsnapshot" /><link rel="prev" href="sql-altermaterializedview.html" title="ALTER MATERIALIZED VIEW" /><link rel="next" href="sql-alteropclass.html" title="ALTER OPERATOR CLASS" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">ALTER OPERATOR</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="sql-altermaterializedview.html" title="ALTER MATERIALIZED VIEW">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 16.3 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="sql-alteropclass.html" title="ALTER OPERATOR CLASS">Next</a></td></tr></table><hr /></div><div class="refentry" id="SQL-ALTEROPERATOR"><div class="titlepage"></div><a id="id-1.9.3.20.1" class="indexterm"></a><div class="refnamediv"><h2><span class="refentrytitle">ALTER OPERATOR</span></h2><p>ALTER OPERATOR — change the definition of an operator</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><pre class="synopsis">
ALTER OPERATOR <em class="replaceable"><code>name</code></em> ( { <em class="replaceable"><code>left_type</code></em> | NONE } , <em class="replaceable"><code>right_type</code></em> )
OWNER TO { <em class="replaceable"><code>new_owner</code></em> | CURRENT_ROLE | CURRENT_USER | SESSION_USER }
ALTER OPERATOR <em class="replaceable"><code>name</code></em> ( { <em class="replaceable"><code>left_type</code></em> | NONE } , <em class="replaceable"><code>right_type</code></em> )
SET SCHEMA <em class="replaceable"><code>new_schema</code></em>
ALTER OPERATOR <em class="replaceable"><code>name</code></em> ( { <em class="replaceable"><code>left_type</code></em> | NONE } , <em class="replaceable"><code>right_type</code></em> )
SET ( { RESTRICT = { <em class="replaceable"><code>res_proc</code></em> | NONE }
| JOIN = { <em class="replaceable"><code>join_proc</code></em> | NONE }
} [, ... ] )
</pre></div><div class="refsect1" id="id-1.9.3.20.5"><h2>Description</h2><p>
<code class="command">ALTER OPERATOR</code> changes the definition of
an operator.
</p><p>
You must own the operator to use <code class="command">ALTER OPERATOR</code>.
To alter the owner, you must be able to <code class="literal">SET ROLE</code> to the
new owning role, and that role must have <code class="literal">CREATE</code>
privilege on the operator's schema.
(These restrictions enforce that altering the owner
doesn't do anything you couldn't do by dropping and recreating the operator.
However, a superuser can alter ownership of any operator anyway.)
</p></div><div class="refsect1" id="id-1.9.3.20.6"><h2>Parameters</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="replaceable"><code>name</code></em></span></dt><dd><p>
The name (optionally schema-qualified) of an existing operator.
</p></dd><dt><span class="term"><em class="replaceable"><code>left_type</code></em></span></dt><dd><p>
The data type of the operator's left operand; write
<code class="literal">NONE</code> if the operator has no left operand.
</p></dd><dt><span class="term"><em class="replaceable"><code>right_type</code></em></span></dt><dd><p>
The data type of the operator's right operand.
</p></dd><dt><span class="term"><em class="replaceable"><code>new_owner</code></em></span></dt><dd><p>
The new owner of the operator.
</p></dd><dt><span class="term"><em class="replaceable"><code>new_schema</code></em></span></dt><dd><p>
The new schema for the operator.
</p></dd><dt><span class="term"><em class="replaceable"><code>res_proc</code></em></span></dt><dd><p>
The restriction selectivity estimator function for this operator; write NONE to remove existing selectivity estimator.
</p></dd><dt><span class="term"><em class="replaceable"><code>join_proc</code></em></span></dt><dd><p>
The join selectivity estimator function for this operator; write NONE to remove existing selectivity estimator.
</p></dd></dl></div></div><div class="refsect1" id="id-1.9.3.20.7"><h2>Examples</h2><p>
Change the owner of a custom operator <code class="literal">a @@ b</code> for type <code class="type">text</code>:
</p><pre class="programlisting">
ALTER OPERATOR @@ (text, text) OWNER TO joe;
</pre><p>
Change the restriction and join selectivity estimator functions of a custom operator <code class="literal">a && b</code> for type <code class="type">int[]</code>:
</p><pre class="programlisting">
ALTER OPERATOR && (_int4, _int4) SET (RESTRICT = _int_contsel, JOIN = _int_contjoinsel);
</pre></div><div class="refsect1" id="id-1.9.3.20.8"><h2>Compatibility</h2><p>
There is no <code class="command">ALTER OPERATOR</code> statement in
the SQL standard.
</p></div><div class="refsect1" id="id-1.9.3.20.9"><h2>See Also</h2><span class="simplelist"><a class="xref" href="sql-createoperator.html" title="CREATE OPERATOR"><span class="refentrytitle">CREATE OPERATOR</span></a>, <a class="xref" href="sql-dropoperator.html" title="DROP OPERATOR"><span class="refentrytitle">DROP OPERATOR</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-altermaterializedview.html" title="ALTER MATERIALIZED VIEW">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="sql-commands.html" title="SQL Commands">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="sql-alteropclass.html" title="ALTER OPERATOR CLASS">Next</a></td></tr><tr><td width="40%" align="left" valign="top">ALTER MATERIALIZED VIEW </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 16.3 Documentation">Home</a></td><td width="40%" align="right" valign="top"> ALTER OPERATOR CLASS</td></tr></table></div></body></html>