'\" t
.\"     Title: DROP EXTENSION
.\"    Author: The PostgreSQL Global Development Group
.\" Generator: DocBook XSL Stylesheets v1.75.2 <http://docbook.sf.net/>
.\"      Date: 2016
.\"    Manual: PostgreSQL 9.5.2 Documentation
.\"    Source: PostgreSQL 9.5.2
.\"  Language: English
.\"
.TH "DROP EXTENSION" "5sql" "2016" "PostgreSQL 9.5.2" "PostgreSQL 9.5.2 Documentation"
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.SH "NAME"
DROP_EXTENSION \- remove an extension
.SH "SYNOPSIS"
.sp
.nf
DROP EXTENSION [ IF EXISTS ] \fIname\fR [, \&.\&.\&.] [ CASCADE | RESTRICT ]
.fi
.SH "DESCRIPTION"
.PP

\fBDROP EXTENSION\fR
removes extensions from the database\&. Dropping an extension causes its component objects to be dropped as well\&.
.PP
You must own the extension to use
\fBDROP EXTENSION\fR\&.
.SH "PARAMETERS"
.PP
IF EXISTS
.RS 4
Do not throw an error if the extension does not exist\&. A notice is issued in this case\&.
.RE
.PP
\fIname\fR
.RS 4
The name of an installed extension\&.
.RE
.PP
CASCADE
.RS 4
Automatically drop objects that depend on the extension\&.
.RE
.PP
RESTRICT
.RS 4
Refuse to drop the extension if any objects depend on it (other than its own member objects and other extensions listed in the same
\fBDROP\fR
command)\&. This is the default\&.
.RE
.SH "EXAMPLES"
.PP
To remove the extension
hstore
from the current database:
.sp
.if n \{\
.RS 4
.\}
.nf
DROP EXTENSION hstore;
.fi
.if n \{\
.RE
.\}
.sp
This command will fail if any of
hstore\(aqs objects are in use in the database, for example if any tables have columns of the
hstore
type\&. Add the
CASCADE
option to forcibly remove those dependent objects as well\&.
.SH "COMPATIBILITY"
.PP

\fBDROP EXTENSION\fR
is a
PostgreSQL
extension\&.
.SH "SEE ALSO"
CREATE EXTENSION (\fBCREATE_EXTENSION\fR(5)), ALTER EXTENSION (\fBALTER_EXTENSION\fR(5))