如何控制 function 中的事务

Question

I am calling the test functions through wrappertest.psql file. wrappertest.psql

select paymentfailedtest();       
select paymentsuccesstest();

Test functions are placed in the testfunctions.psql file.

Answer 1

In Postgresql, Functions does not allow to rollback/commit transaction. You need to use stored procedure avail the functionality of rollback & commit.

CREATE PROCEDURE transaction_test1()
LANGUAGE plpgsql
AS $$
BEGIN
    FOR i IN 0..9 LOOP
        INSERT INTO test1 (a) VALUES (i);
        IF i % 2 = 0 THEN
            COMMIT;
        ELSE
            ROLLBACK;
        END IF;
    END LOOP;
END
$$;

CALL transaction_test1();

refer https://www.postgresql.org/docs/11/plpgsql-transactions.html for more info.