'\" t
.\"     Title: DROP TRANSFORM
.\"    Author: The PostgreSQL Global Development Group
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: 2021
.\"    Manual: PostgreSQL 9.6.24 Documentation
.\"    Source: PostgreSQL 9.6.24
.\"  Language: English
.\"
.TH "DROP TRANSFORM" "7" "2021" "PostgreSQL 9.6.24" "PostgreSQL 9.6.24 Documentation"
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.SH "NAME"
DROP_TRANSFORM \- remove a transform
.SH "SYNOPSIS"
.sp
.nf
DROP TRANSFORM [ IF EXISTS ] FOR \fItype_name\fR LANGUAGE \fIlang_name\fR [ CASCADE | RESTRICT ]
.fi
.SH "DESCRIPTION"
.PP
\fBDROP TRANSFORM\fR
removes a previously defined transform\&.
.PP
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\&.
.SH "PARAMETERS"
.PP
IF EXISTS
.RS 4
Do not throw an error if the transform does not exist\&. A notice is issued in this case\&.
.RE
.PP
\fItype_name\fR
.RS 4
The name of the data type of the transform\&.
.RE
.PP
\fIlang_name\fR
.RS 4
The name of the language of the transform\&.
.RE
.PP
CASCADE
.RS 4
Automatically drop objects that depend on the transform, and in turn all objects that depend on those objects (see
Section 5.13, \(lqDependency Tracking\(rq, in the documentation)\&.
.RE
.PP
RESTRICT
.RS 4
Refuse to drop the transform if any objects depend on it\&. This is the default\&.
.RE
.SH "EXAMPLES"
.PP
To drop the transform for type
hstore
and language
plpythonu:
.sp
.if n \{\
.RS 4
.\}
.nf
DROP TRANSFORM FOR hstore LANGUAGE plpythonu;
.fi
.if n \{\
.RE
.\}
.SH "COMPATIBILITY"
.PP
This form of
\fBDROP TRANSFORM\fR
is a
PostgreSQL
extension\&. See
CREATE TRANSFORM (\fBCREATE_TRANSFORM\fR(7))
for details\&.
.SH "SEE ALSO"
CREATE TRANSFORM (\fBCREATE_TRANSFORM\fR(7))