<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >DROP TRANSFORM</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 9.6.21 Documentation" HREF="index.html"><LINK REL="UP" TITLE="SQL Commands" HREF="sql-commands.html"><LINK REL="PREVIOUS" TITLE="DROP TEXT SEARCH TEMPLATE" HREF="sql-droptstemplate.html"><LINK REL="NEXT" TITLE="DROP TRIGGER" HREF="sql-droptrigger.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="2021-02-27T18:26:08"></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 9.6.21 Documentation</A ></TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A TITLE="DROP TEXT SEARCH TEMPLATE" HREF="sql-droptstemplate.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="DROP TRIGGER" HREF="sql-droptrigger.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="SQL-DROPTRANSFORM" ></A >DROP TRANSFORM</H1 ><DIV CLASS="REFNAMEDIV" ><A NAME="AEN87987" ></A ><H2 >Name</H2 >DROP TRANSFORM -- remove a transform</DIV ><DIV CLASS="REFSYNOPSISDIV" ><A NAME="AEN87990" ></A ><H2 >Synopsis</H2 ><PRE CLASS="SYNOPSIS" >DROP TRANSFORM [ IF EXISTS ] FOR <TT CLASS="REPLACEABLE" ><I >type_name</I ></TT > LANGUAGE <TT CLASS="REPLACEABLE" ><I >lang_name</I ></TT > [ CASCADE | RESTRICT ]</PRE ></DIV ><DIV CLASS="REFSECT1" ><A NAME="SQL-DROPTRANSFORM-DESCRIPTION" ></A ><H2 >Description</H2 ><P > <TT CLASS="COMMAND" >DROP TRANSFORM</TT > removes a previously defined transform. </P ><P > To be able to drop a transform, you must own the type and the language. These are the same privileges that are required to create a transform. </P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN87999" ></A ><H2 >Parameters</H2 ><P ></P ><DIV CLASS="VARIABLELIST" ><DL ><DT ><TT CLASS="LITERAL" >IF EXISTS</TT ></DT ><DD ><P > Do not throw an error if the transform does not exist. A notice is issued in this case. </P ></DD ><DT ><TT CLASS="REPLACEABLE" ><I >type_name</I ></TT ></DT ><DD ><P > The name of the data type of the transform. </P ></DD ><DT ><TT CLASS="REPLACEABLE" ><I >lang_name</I ></TT ></DT ><DD ><P > The name of the language of the transform. </P ></DD ><DT ><TT CLASS="LITERAL" >CASCADE</TT ></DT ><DD ><P > Automatically drop objects that depend on the transform, and in turn all objects that depend on those objects (see <A HREF="ddl-depend.html" >Section 5.13</A >). </P ></DD ><DT ><TT CLASS="LITERAL" >RESTRICT</TT ></DT ><DD ><P > Refuse to drop the transform if any objects depend on it. This is the default. </P ></DD ></DL ></DIV ></DIV ><DIV CLASS="REFSECT1" ><A NAME="SQL-DROPTRANSFORM-EXAMPLES" ></A ><H2 >Examples</H2 ><P > To drop the transform for type <TT CLASS="TYPE" >hstore</TT > and language <TT CLASS="LITERAL" >plpythonu</TT >: </P><PRE CLASS="PROGRAMLISTING" >DROP TRANSFORM FOR hstore LANGUAGE plpythonu;</PRE ><P></P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="SQL-DROPTRANSFORM-COMPAT" ></A ><H2 >Compatibility</H2 ><P > This form of <TT CLASS="COMMAND" >DROP TRANSFORM</TT > is a <SPAN CLASS="PRODUCTNAME" >PostgreSQL</SPAN > extension. See <A HREF="sql-createtransform.html" >CREATE TRANSFORM</A > for details. </P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN88040" ></A ><H2 >See Also</H2 ><A HREF="sql-createtransform.html" >CREATE TRANSFORM</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-droptstemplate.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-droptrigger.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >DROP TEXT SEARCH TEMPLATE</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" >DROP TRIGGER</TD ></TR ></TABLE ></DIV ></BODY ></HTML >