Help Center/ GaussDB(DWS)/ SQL Syntax Reference/ SQL Syntax Reference (9.1.0.x)/ DDL Syntax/ ALTER TRIGGER
Updated on 2025-07-22 GMT+08:00
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ALTER TRIGGER

Function

ALTER TRIGGER modifies the definition of a trigger.

Precautions

Only the owner of a table where a trigger is created and system administrators can run the ALTER TRIGGER statement.

Syntax

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ALTER TRIGGER trigger_name ON table_name RENAME TO new_name;

Parameter Description

Table 1 ALTER TRIGGER parameters

Parameter

Description

Value Range

trigger_name

Specifies the name of the trigger to be modified.

Valid trigger name.

table_name

Specifies the name of the table where the trigger to be modified is located.

Name of the valid table where the trigger is located.

new_name

Specifies the new trigger name.

A string compliant with the identifier naming rules.

Examples

Create sample tables test_trigger_src_tbl and test_trigger_des_tbl.

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DROP TABLE IF EXISTS test_trigger_src_tbl;
DROP TABLE IF EXISTS test_trigger_des_tbl;

CREATE TABLE test_trigger_src_tbl(id1 INT, id2 INT, id3 INT);
CREATE TABLE test_trigger_des_tbl(id1 INT, id2 INT, id3 INT);

Create the tri_insert_func() trigger function.

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DROP FUNCTION IF EXISTS tri_insert_func;
CREATE OR REPLACE FUNCTION tri_insert_func() RETURNS TRIGGER AS
           $$
           DECLARE
           BEGIN
                   INSERT INTO test_trigger_des_tbl VALUES(NEW.id1, NEW.id2, NEW.id3);
                   RETURN NEW;
           END
           $$ LANGUAGE PLPGSQL;

Create the insert_trigger trigger.

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CREATE TRIGGER insert_trigger
           BEFORE INSERT ON test_trigger_src_tbl
           FOR EACH ROW
           EXECUTE PROCEDURE tri_insert_func();

Modify the insert_trigger trigger.

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ALTER TRIGGER insert_trigger ON test_trigger_src_tbl RENAME TO delete_trigger_renamed;

Disable the delete_trigger_renamed trigger.

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ALTER TABLE test_trigger_src_tbl DISABLE TRIGGER delete_trigger_renamed;

Disable all triggers on the test_trigger_src_tbl table.

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ALTER TABLE test_trigger_src_tbl DISABLE TRIGGER ALL;

Helpful Links

CREATE TRIGGER, DROP TRIGGER, and ALTER TABLE

Parent Topic: DDL Syntax