'\" t
.\"     Title: DROP COLLATION
.\"    Author: The PostgreSQL Global Development Group
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
.\"      Date: 2017-11-06
.\"    Manual: PostgreSQL 9.2.24 Documentation
.\"    Source: PostgreSQL 9.2.24
.\"  Language: English
.\"
.TH "DROP COLLATION" "7" "2017-11-06" "PostgreSQL 9.2.24" "PostgreSQL 9.2.24 Documentation"
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.SH "NAME"
DROP_COLLATION \- remove a collation
.\" DROP COLLATION
.SH "SYNOPSIS"
.sp
.nf
DROP COLLATION [ IF EXISTS ] \fIname\fR [ CASCADE | RESTRICT ]
.fi
.SH "DESCRIPTION"
.PP
\fBDROP COLLATION\fR
removes a previously defined collation\&. To be able to drop a collation, you must own the collation\&.
.SH "PARAMETERS"
.PP
IF EXISTS
.RS 4
Do not throw an error if the collation does not exist\&. A notice is issued in this case\&.
.RE
.PP
\fIname\fR
.RS 4
The name of the collation\&. The collation name can be schema\-qualified\&.
.RE
.PP
CASCADE
.RS 4
Automatically drop objects that depend on the collation\&.
.RE
.PP
RESTRICT
.RS 4
Refuse to drop the collation if any objects depend on it\&. This is the default\&.
.RE
.SH "EXAMPLES"
.PP
To drop the collation named
german:
.sp
.if n \{\
.RS 4
.\}
.nf
DROP COLLATION german;
.fi
.if n \{\
.RE
.\}
.SH "COMPATIBILITY"
.PP
The
\fBDROP COLLATION\fR
command conforms to the
SQL
standard, apart from the
IF EXISTS
option, which is a
PostgreSQL
extension\&.
.SH "SEE ALSO"
ALTER COLLATION (\fBALTER_COLLATION\fR(7)), CREATE COLLATION (\fBCREATE_COLLATION\fR(7))