Code Inspection: Use of transaction management statements in triggers
Reports usages of transaction management statements like COMMIT or ROLLBACK in trigger bodies.
With COMMIT or ROLLBACK statements in a trigger body, the trigger will not compile. The fail happens because triggers start during transactions. When the trigger starts the current transaction is still not complete. As COMMIT terminates a transaction, both statements (COMMIT and ROLLBACK) would lead to an exception. Changes that are executed in a trigger should be committed (or rolled back) by the owning transaction that started the trigger.
Example (Oracle):
CREATE TABLE employee_audit
(
id INT NOT NULL,
update_date DATE NOT NULL,
old_name VARCHAR2(100),
new_name VARCHAR2(100)
);
CREATE TABLE employees
(
id INT NOT NULL,
name VARCHAR2(100) NOT NULL
);
CREATE OR REPLACE TRIGGER trig_commit
AFTER UPDATE OF name
ON employees
FOR EACH ROW
BEGIN
INSERT INTO employee_audit VALUES (:old.id, SYSDATE, :old.name, :new.name);
COMMIT;
END;
CREATE OR REPLACE TRIGGER trig_rollback
AFTER UPDATE OF name
ON employees
FOR EACH ROW
BEGIN
INSERT INTO employee_audit VALUES (:old.id, SYSDATE, :old.name, :new.name);
ROLLBACK;
END;
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Last modified: 13 May 2022