<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <HTML ><HEAD ><TITLE >ALTER FUNCTION</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK REV="MADE" HREF="mailto:pgsql-docs@postgresql.org"><LINK REL="HOME" TITLE="PostgreSQL 7.4.1 Documentation" HREF="index.html"><LINK REL="UP" TITLE="SQL Commands" HREF="sql-commands.html"><LINK REL="PREVIOUS" TITLE="ALTER DOMAIN" HREF="sql-alterdomain.html"><LINK REL="NEXT" TITLE="ALTER GROUP" HREF="sql-altergroup.html"><LINK REL="STYLESHEET" TYPE="text/css" HREF="stylesheet.css"><META NAME="creation" CONTENT="2003-12-22T03:48:47"></HEAD ><BODY CLASS="REFENTRY" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="5" ALIGN="center" VALIGN="bottom" >PostgreSQL 7.4.1 Documentation</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A HREF="sql-alterdomain.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A HREF="sql-alterdomain.html" >Fast Backward</A ></TD ><TD WIDTH="60%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="top" ><A HREF="sql-altergroup.html" >Fast Forward</A ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="top" ><A HREF="sql-altergroup.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="SQL-ALTERFUNCTION" ></A >ALTER FUNCTION</H1 ><DIV CLASS="REFNAMEDIV" ><A NAME="AEN34879" ></A ><H2 >Name</H2 >ALTER FUNCTION -- change the definition of a function</DIV ><A NAME="AEN34882" ></A ><DIV CLASS="REFSYNOPSISDIV" ><A NAME="AEN34884" ></A ><H2 >Synopsis</H2 ><PRE CLASS="SYNOPSIS" >ALTER FUNCTION <VAR CLASS="REPLACEABLE" >name</VAR > ( [ <VAR CLASS="REPLACEABLE" >type</VAR > [, ...] ] ) RENAME TO <VAR CLASS="REPLACEABLE" >newname</VAR ></PRE ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN34889" ></A ><H2 >Description</H2 ><P > <TT CLASS="COMMAND" >ALTER FUNCTION</TT > changes the definition of a function. The only functionality is to rename the function. </P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN34893" ></A ><H2 >Parameters</H2 ><P ></P ><DIV CLASS="VARIABLELIST" ><DL ><DT ><VAR CLASS="REPLACEABLE" >name</VAR ></DT ><DD ><P > The name (optionally schema-qualified) of an existing function. </P ></DD ><DT ><VAR CLASS="REPLACEABLE" >type</VAR ></DT ><DD ><P > The data type of an argument of the function. </P ></DD ><DT ><VAR CLASS="REPLACEABLE" >newname</VAR ></DT ><DD ><P > The new name of the function. </P ></DD ></DL ></DIV ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN34911" ></A ><H2 >Examples</H2 ><P > To rename the function <TT CLASS="LITERAL" >sqrt</TT > for type <TT CLASS="TYPE" >integer</TT > to <TT CLASS="LITERAL" >square_root</TT >: </P><PRE CLASS="PROGRAMLISTING" >ALTER FUNCTION sqrt(integer) RENAME TO square_root;</PRE ><P> </P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN34918" ></A ><H2 >Compatibility</H2 ><P > There is an <TT CLASS="COMMAND" >ALTER FUNCTION</TT > statement in the SQL standard, but it does not provide the option to rename the function. </P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN34922" ></A ><H2 >See Also</H2 ><A HREF="sql-createfunction.html" ><I >CREATE FUNCTION</I ></A >, <A HREF="sql-dropfunction.html" ><I >DROP FUNCTION</I ></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-alterdomain.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-altergroup.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >ALTER DOMAIN</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 GROUP</TD ></TR ></TABLE ></DIV ></BODY ></HTML >