'\" t
.\"     Title: DROP TRIGGER
.\"    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 TRIGGER" "7" "2021" "PostgreSQL 9.6.24" "PostgreSQL 9.6.24 Documentation"
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.SH "NAME"
DROP_TRIGGER \- remove a trigger
.SH "SYNOPSIS"
.sp
.nf
DROP TRIGGER [ IF EXISTS ] \fIname\fR ON \fItable_name\fR [ CASCADE | RESTRICT ]
.fi
.SH "DESCRIPTION"
.PP
\fBDROP TRIGGER\fR
removes an existing trigger definition\&. To execute this command, the current user must be the owner of the table for which the trigger is defined\&.
.SH "PARAMETERS"
.PP
IF EXISTS
.RS 4
Do not throw an error if the trigger does not exist\&. A notice is issued in this case\&.
.RE
.PP
\fIname\fR
.RS 4
The name of the trigger to remove\&.
.RE
.PP
\fItable_name\fR
.RS 4
The name (optionally schema\-qualified) of the table for which the trigger is defined\&.
.RE
.PP
CASCADE
.RS 4
Automatically drop objects that depend on the trigger, 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 trigger if any objects depend on it\&. This is the default\&.
.RE
.SH "EXAMPLES"
.PP
Destroy the trigger
if_dist_exists
on the table
films:
.sp
.if n \{\
.RS 4
.\}
.nf
DROP TRIGGER if_dist_exists ON films;
.fi
.if n \{\
.RE
.\}
.SH "COMPATIBILITY"
.PP
The
\fBDROP TRIGGER\fR
statement in
PostgreSQL
is incompatible with the SQL standard\&. In the SQL standard, trigger names are not local to tables, so the command is simply
DROP TRIGGER \fIname\fR\&.
.SH "SEE ALSO"
CREATE TRIGGER (\fBCREATE_TRIGGER\fR(7))