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ALTER_TRIGGER.7
'\" t .\" Title: ALTER TRIGGER .\" Author: The PostgreSQL Global Development Group .\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/> .\" Date: 2023 .\" Manual: PostgreSQL 13.13 Documentation .\" Source: PostgreSQL 13.13 .\" Language: English .\" .TH "ALTER TRIGGER" "7" "2023" "PostgreSQL 13.13" "PostgreSQL 13.13 Documentation" .\" ----------------------------------------------------------------- .\" * Define some portability stuff .\" ----------------------------------------------------------------- .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .\" http://bugs.debian.org/507673 .\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .ie \n(.g .ds Aq \(aq .el .ds Aq ' .\" ----------------------------------------------------------------- .\" * set default formatting .\" ----------------------------------------------------------------- .\" disable hyphenation .nh .\" disable justification (adjust text to left margin only) .ad l .\" ----------------------------------------------------------------- .\" * MAIN CONTENT STARTS HERE * .\" ----------------------------------------------------------------- .SH "NAME" ALTER_TRIGGER \- change the definition of a trigger .SH "SYNOPSIS" .sp .nf ALTER TRIGGER \fIname\fR ON \fItable_name\fR RENAME TO \fInew_name\fR ALTER TRIGGER \fIname\fR ON \fItable_name\fR [ NO ] DEPENDS ON EXTENSION \fIextension_name\fR .fi .SH "DESCRIPTION" .PP \fBALTER TRIGGER\fR changes properties of an existing trigger\&. The RENAME clause changes the name of the given trigger without otherwise changing the trigger definition\&. The DEPENDS ON EXTENSION clause marks the trigger as dependent on an extension, such that if the extension is dropped, the trigger will automatically be dropped as well\&. .PP You must own the table on which the trigger acts to be allowed to change its properties\&. .SH "PARAMETERS" .PP \fIname\fR .RS 4 The name of an existing trigger to alter\&. .RE .PP \fItable_name\fR .RS 4 The name of the table on which this trigger acts\&. .RE .PP \fInew_name\fR .RS 4 The new name for the trigger\&. .RE .PP \fIextension_name\fR .RS 4 The name of the extension that the trigger is to depend on (or no longer dependent on, if NO is specified)\&. A trigger that\*(Aqs marked as dependent on an extension is automatically dropped when the extension is dropped\&. .RE .SH "NOTES" .PP The ability to temporarily enable or disable a trigger is provided by ALTER TABLE (\fBALTER_TABLE\fR(7)), not by \fBALTER TRIGGER\fR, because \fBALTER TRIGGER\fR has no convenient way to express the option of enabling or disabling all of a table\*(Aqs triggers at once\&. .SH "EXAMPLES" .PP To rename an existing trigger: .sp .if n \{\ .RS 4 .\} .nf ALTER TRIGGER emp_stamp ON emp RENAME TO emp_track_chgs; .fi .if n \{\ .RE .\} .PP To mark a trigger as being dependent on an extension: .sp .if n \{\ .RS 4 .\} .nf ALTER TRIGGER emp_stamp ON emp DEPENDS ON EXTENSION emplib; .fi .if n \{\ .RE .\} .SH "COMPATIBILITY" .PP \fBALTER TRIGGER\fR is a PostgreSQL extension of the SQL standard\&. .SH "SEE ALSO" ALTER TABLE (\fBALTER_TABLE\fR(7))