Name
ALTER TRIGGER -- change the definition of a triggerSynopsis
ALTER TRIGGER name ON table_name RENAME TO new_name ALTER TRIGGER name ON table_name DEPENDS ON EXTENSION extension_name
Description
ALTER TRIGGER
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.
You must own the table on which the trigger acts to be allowed to change its properties.
Parameters
name
-
The name of an existing trigger to alter.
table_name
-
The name of the table on which this trigger acts.
new_name
-
The new name for the trigger.
extension_name
-
The name of the extension that the trigger is to depend on.
Notes
The ability to temporarily enable or disable a trigger is provided by ALTER TABLE, not by ALTER TRIGGER
, because ALTER TRIGGER
has no convenient way to express the option of enabling or disabling all of a table's triggers at once.
Examples
To rename an existing trigger:
ALTER TRIGGER emp_stamp ON emp RENAME TO emp_track_chgs;
To mark a trigger as being dependent on an extension:
ALTER TRIGGER emp_stamp ON emp DEPENDS ON EXTENSION emplib;
Compatibility
ALTER TRIGGER
is a PostgreSQL extension of the SQL standard.
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