<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >DROP TYPE</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 9.3.9 Documentation" HREF="index.html"><LINK REL="UP" TITLE="SQL Commands" HREF="sql-commands.html"><LINK REL="PREVIOUS" TITLE="DROP TRIGGER" HREF="sql-droptrigger.html"><LINK REL="NEXT" TITLE="DROP USER" HREF="sql-dropuser.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="2015-06-13T20:07:22"></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" ><A HREF="index.html" >PostgreSQL 9.3.9 Documentation</A ></TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A TITLE="DROP TRIGGER" HREF="sql-droptrigger.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 USER" HREF="sql-dropuser.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="SQL-DROPTYPE" ></A >DROP TYPE</H1 ><DIV CLASS="REFNAMEDIV" ><A NAME="AEN77497" ></A ><H2 >Name</H2 >DROP TYPE -- remove a data type</DIV ><DIV CLASS="REFSYNOPSISDIV" ><A NAME="AEN77502" ></A ><H2 >Synopsis</H2 ><PRE CLASS="SYNOPSIS" >DROP TYPE [ IF EXISTS ] <TT CLASS="REPLACEABLE" ><I >name</I ></TT > [, ...] [ CASCADE | RESTRICT ]</PRE ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN77505" ></A ><H2 >Description</H2 ><P > <TT CLASS="COMMAND" >DROP TYPE</TT > removes a user-defined data type. Only the owner of a type can remove it. </P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN77509" ></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 type does not exist. A notice is issued in this case. </P ></DD ><DT ><TT CLASS="REPLACEABLE" ><I >name</I ></TT ></DT ><DD ><P > The name (optionally schema-qualified) of the data type to remove. </P ></DD ><DT ><TT CLASS="LITERAL" >CASCADE</TT ></DT ><DD ><P > Automatically drop objects that depend on the type (such as table columns, functions, operators). </P ></DD ><DT ><TT CLASS="LITERAL" >RESTRICT</TT ></DT ><DD ><P > Refuse to drop the type if any objects depend on it. This is the default. </P ></DD ></DL ></DIV ></DIV ><DIV CLASS="REFSECT1" ><A NAME="SQL-DROPTYPE-EXAMPLES" ></A ><H2 >Examples</H2 ><P > To remove the data type <TT CLASS="TYPE" >box</TT >: </P><PRE CLASS="PROGRAMLISTING" >DROP TYPE box;</PRE ><P></P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="SQL-DROPTYPE-COMPATIBILITY" ></A ><H2 >Compatibility</H2 ><P > This command is similar to the corresponding command in the SQL standard, apart from the <TT CLASS="LITERAL" >IF EXISTS</TT > option, which is a <SPAN CLASS="PRODUCTNAME" >PostgreSQL</SPAN > extension. But note that much of the <TT CLASS="COMMAND" >CREATE TYPE</TT > command and the data type extension mechanisms in <SPAN CLASS="PRODUCTNAME" >PostgreSQL</SPAN > differ from the SQL standard. </P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="SQL-DROPTYPE-SEE-ALSO" ></A ><H2 >See Also</H2 ><A HREF="sql-altertype.html" >ALTER TYPE</A >, <A HREF="sql-createtype.html" >CREATE TYPE</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-droptrigger.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-dropuser.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >DROP TRIGGER</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 USER</TD ></TR ></TABLE ></DIV ></BODY ></HTML >