<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >ALTER OPERATOR</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REV="MADE" HREF="mailto:pgsql-docs@postgresql.org"><LINK REL="HOME" TITLE="PostgreSQL 9.6.17 Documentation" HREF="index.html"><LINK REL="UP" TITLE="SQL Commands" HREF="sql-commands.html"><LINK REL="PREVIOUS" TITLE="ALTER MATERIALIZED VIEW" HREF="sql-altermaterializedview.html"><LINK REL="NEXT" TITLE="ALTER OPERATOR CLASS" HREF="sql-alteropclass.html"><LINK REL="STYLESHEET" TYPE="text/css" HREF="stylesheet.css"><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=ISO-8859-1"><META NAME="creation" CONTENT="2020-02-15T12:30:38"></HEAD ><BODY CLASS="REFENTRY" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="4" ALIGN="center" VALIGN="bottom" ><A HREF="index.html" >PostgreSQL 9.6.17 Documentation</A ></TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A TITLE="ALTER MATERIALIZED VIEW" HREF="sql-altermaterializedview.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A HREF="sql-commands.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="60%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="20%" ALIGN="right" VALIGN="top" ><A TITLE="ALTER OPERATOR CLASS" HREF="sql-alteropclass.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="SQL-ALTEROPERATOR" ></A >ALTER OPERATOR</H1 ><DIV CLASS="REFNAMEDIV" ><A NAME="AEN74679" ></A ><H2 >Name</H2 >ALTER OPERATOR -- change the definition of an operator</DIV ><DIV CLASS="REFSYNOPSISDIV" ><A NAME="AEN74682" ></A ><H2 >Synopsis</H2 ><PRE CLASS="SYNOPSIS" >ALTER OPERATOR <TT CLASS="REPLACEABLE" ><I >name</I ></TT > ( { <TT CLASS="REPLACEABLE" ><I >left_type</I ></TT > | NONE } , { <TT CLASS="REPLACEABLE" ><I >right_type</I ></TT > | NONE } ) OWNER TO { <TT CLASS="REPLACEABLE" ><I >new_owner</I ></TT > | CURRENT_USER | SESSION_USER } ALTER OPERATOR <TT CLASS="REPLACEABLE" ><I >name</I ></TT > ( { <TT CLASS="REPLACEABLE" ><I >left_type</I ></TT > | NONE } , { <TT CLASS="REPLACEABLE" ><I >right_type</I ></TT > | NONE } ) SET SCHEMA <TT CLASS="REPLACEABLE" ><I >new_schema</I ></TT > ALTER OPERATOR <TT CLASS="REPLACEABLE" ><I >name</I ></TT > ( { <TT CLASS="REPLACEABLE" ><I >left_type</I ></TT > | NONE } , { <TT CLASS="REPLACEABLE" ><I >right_type</I ></TT > | NONE } ) SET ( { RESTRICT = { <TT CLASS="REPLACEABLE" ><I >res_proc</I ></TT > | NONE } | JOIN = { <TT CLASS="REPLACEABLE" ><I >join_proc</I ></TT > | NONE } } [, ... ] )</PRE ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN74697" ></A ><H2 >Description</H2 ><P > <TT CLASS="COMMAND" >ALTER OPERATOR</TT > changes the definition of an operator. </P ><P > You must own the operator to use <TT CLASS="COMMAND" >ALTER OPERATOR</TT >. To alter the owner, you must also be a direct or indirect member of the new owning role, and that role must have <TT CLASS="LITERAL" >CREATE</TT > 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" ><A NAME="AEN74704" ></A ><H2 >Parameters</H2 ><P ></P ><DIV CLASS="VARIABLELIST" ><DL ><DT ><TT CLASS="REPLACEABLE" ><I >name</I ></TT ></DT ><DD ><P > The name (optionally schema-qualified) of an existing operator. </P ></DD ><DT ><TT CLASS="REPLACEABLE" ><I >left_type</I ></TT ></DT ><DD ><P > The data type of the operator's left operand; write <TT CLASS="LITERAL" >NONE</TT > if the operator has no left operand. </P ></DD ><DT ><TT CLASS="REPLACEABLE" ><I >right_type</I ></TT ></DT ><DD ><P > The data type of the operator's right operand; write <TT CLASS="LITERAL" >NONE</TT > if the operator has no right operand. </P ></DD ><DT ><TT CLASS="REPLACEABLE" ><I >new_owner</I ></TT ></DT ><DD ><P > The new owner of the operator. </P ></DD ><DT ><TT CLASS="REPLACEABLE" ><I >new_schema</I ></TT ></DT ><DD ><P > The new schema for the operator. </P ></DD ><DT ><TT CLASS="REPLACEABLE" ><I >res_proc</I ></TT ></DT ><DD ><P > The restriction selectivity estimator function for this operator; write NONE to remove existing selectivity estimator. </P ></DD ><DT ><TT CLASS="REPLACEABLE" ><I >join_proc</I ></TT ></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" ><A NAME="AEN74744" ></A ><H2 >Examples</H2 ><P > Change the owner of a custom operator <TT CLASS="LITERAL" >a @@ b</TT > for type <TT CLASS="TYPE" >text</TT >: </P><PRE CLASS="PROGRAMLISTING" >ALTER OPERATOR @@ (text, text) OWNER TO joe;</PRE ><P></P ><P > Change the restriction and join selectivity estimator functions of a custom operator <TT CLASS="LITERAL" >a && b</TT > for type <TT CLASS="TYPE" >int[]</TT >: </P><PRE CLASS="PROGRAMLISTING" >ALTER OPERATOR && (_int4, _int4) SET (RESTRICT = _int_contsel, JOIN = _int_contjoinsel);</PRE ><P></P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN74754" ></A ><H2 >Compatibility</H2 ><P > There is no <TT CLASS="COMMAND" >ALTER OPERATOR</TT > statement in the SQL standard. </P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN74758" ></A ><H2 >See Also</H2 ><A HREF="sql-createoperator.html" >CREATE OPERATOR</A >, <A HREF="sql-dropoperator.html" >DROP OPERATOR</A ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="sql-altermaterializedview.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="sql-alteropclass.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >ALTER MATERIALIZED VIEW</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="sql-commands.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >ALTER OPERATOR CLASS</TD ></TR ></TABLE ></DIV ></BODY ></HTML >