Anonymous Block Supporting Autonomous Transaction

An autonomous transaction can be defined in an anonymous block. The identifier of an autonomous transaction is PRAGMA AUTONOMOUS_TRANSACTION. The syntax of an autonomous transaction is the same as that of creating an anonymous block. The following is an example.

create table t1(a int ,b text);

START TRANSACTION;
DECLARE
    PRAGMA AUTONOMOUS_TRANSACTION;
BEGIN
    raise notice 'just use call.';
    insert into t1 values(1,'you are so cute,will commit!');
END;
/
insert into t1 values(1,'you will rollback!');
rollback;

select * from t1;

In the preceding example, an anonymous block containing an autonomous transaction is finally executed before a transaction block to be rolled back, which directly illustrates a characteristic of the autonomous transaction, that is, rollback of the primary transaction does not affect content that has been committed by the autonomous transaction.