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Copy pathplpgsql_transaction.sql
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511 lines (401 loc) · 8.59 KB
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CREATE TABLE test1 (a int, b text);
CREATE PROCEDURE transaction_test1(x int, y text)
LANGUAGE plpgsql
AS $$
BEGIN
FOR i IN 0..x LOOP
INSERT INTO test1 (a, b) VALUES (i, y);
IF i % 2 = 0 THEN
COMMIT;
ELSE
ROLLBACK;
END IF;
END LOOP;
END
$$;
CALL transaction_test1(9, 'foo');
SELECT * FROM test1;
TRUNCATE test1;
DO
LANGUAGE plpgsql
$$
BEGIN
FOR i IN 0..9 LOOP
INSERT INTO test1 (a) VALUES (i);
IF i % 2 = 0 THEN
COMMIT;
ELSE
ROLLBACK;
END IF;
END LOOP;
END
$$;
SELECT * FROM test1;
-- transaction commands not allowed when called in transaction block
START TRANSACTION;
CALL transaction_test1(9, 'error');
COMMIT;
START TRANSACTION;
DO LANGUAGE plpgsql $$ BEGIN COMMIT; END $$;
COMMIT;
TRUNCATE test1;
-- not allowed in a function
CREATE FUNCTION transaction_test2() RETURNS int
LANGUAGE plpgsql
AS $$
BEGIN
FOR i IN 0..9 LOOP
INSERT INTO test1 (a) VALUES (i);
IF i % 2 = 0 THEN
COMMIT;
ELSE
ROLLBACK;
END IF;
END LOOP;
RETURN 1;
END
$$;
SELECT transaction_test2();
SELECT * FROM test1;
-- also not allowed if procedure is called from a function
CREATE FUNCTION transaction_test3() RETURNS int
LANGUAGE plpgsql
AS $$
BEGIN
CALL transaction_test1(9, 'error');
RETURN 1;
END;
$$;
SELECT transaction_test3();
SELECT * FROM test1;
-- DO block inside function
CREATE FUNCTION transaction_test4() RETURNS int
LANGUAGE plpgsql
AS $$
BEGIN
EXECUTE 'DO LANGUAGE plpgsql $x$ BEGIN COMMIT; END $x$';
RETURN 1;
END;
$$;
SELECT transaction_test4();
-- proconfig settings currently disallow transaction statements
CREATE PROCEDURE transaction_test5()
LANGUAGE plpgsql
SET work_mem = 555
AS $$
BEGIN
COMMIT;
END;
$$;
CALL transaction_test5();
-- SECURITY DEFINER currently disallow transaction statements
CREATE PROCEDURE transaction_test5b()
LANGUAGE plpgsql
SECURITY DEFINER
AS $$
BEGIN
COMMIT;
END;
$$;
CALL transaction_test5b();
TRUNCATE test1;
-- nested procedure calls
CREATE PROCEDURE transaction_test6(c text)
LANGUAGE plpgsql
AS $$
BEGIN
CALL transaction_test1(9, c);
END;
$$;
CALL transaction_test6('bar');
SELECT * FROM test1;
TRUNCATE test1;
CREATE PROCEDURE transaction_test7()
LANGUAGE plpgsql
AS $$
BEGIN
DO 'BEGIN CALL transaction_test1(9, $x$baz$x$); END;';
END;
$$;
CALL transaction_test7();
SELECT * FROM test1;
CREATE PROCEDURE transaction_test8()
LANGUAGE plpgsql
AS $$
BEGIN
EXECUTE 'CALL transaction_test1(10, $x$baz$x$)';
END;
$$;
CALL transaction_test8();
-- commit inside cursor loop
CREATE TABLE test2 (x int);
INSERT INTO test2 VALUES (0), (1), (2), (3), (4);
TRUNCATE test1;
DO LANGUAGE plpgsql $$
DECLARE
r RECORD;
BEGIN
FOR r IN SELECT * FROM test2 ORDER BY x LOOP
INSERT INTO test1 (a) VALUES (r.x);
COMMIT;
END LOOP;
END;
$$;
SELECT * FROM test1;
-- check that this doesn't leak a holdable portal
SELECT * FROM pg_cursors;
-- error in cursor loop with commit
TRUNCATE test1;
DO LANGUAGE plpgsql $$
DECLARE
r RECORD;
BEGIN
FOR r IN SELECT * FROM test2 ORDER BY x LOOP
INSERT INTO test1 (a) VALUES (12/(r.x-2));
COMMIT;
END LOOP;
END;
$$;
SELECT * FROM test1;
SELECT * FROM pg_cursors;
-- rollback inside cursor loop
TRUNCATE test1;
DO LANGUAGE plpgsql $$
DECLARE
r RECORD;
BEGIN
FOR r IN SELECT * FROM test2 ORDER BY x LOOP
INSERT INTO test1 (a) VALUES (r.x);
ROLLBACK;
END LOOP;
END;
$$;
SELECT * FROM test1;
SELECT * FROM pg_cursors;
-- first commit then rollback inside cursor loop
TRUNCATE test1;
DO LANGUAGE plpgsql $$
DECLARE
r RECORD;
BEGIN
FOR r IN SELECT * FROM test2 ORDER BY x LOOP
INSERT INTO test1 (a) VALUES (r.x);
IF r.x % 2 = 0 THEN
COMMIT;
ELSE
ROLLBACK;
END IF;
END LOOP;
END;
$$;
SELECT * FROM test1;
SELECT * FROM pg_cursors;
-- rollback inside cursor loop
TRUNCATE test1;
DO LANGUAGE plpgsql $$
DECLARE
r RECORD;
BEGIN
FOR r IN UPDATE test2 SET x = x * 2 RETURNING x LOOP
INSERT INTO test1 (a) VALUES (r.x);
ROLLBACK;
END LOOP;
END;
$$;
SELECT * FROM test1;
SELECT * FROM test2;
SELECT * FROM pg_cursors;
-- commit inside block with exception handler
TRUNCATE test1;
DO LANGUAGE plpgsql $$
BEGIN
BEGIN
INSERT INTO test1 (a) VALUES (1);
COMMIT;
INSERT INTO test1 (a) VALUES (1/0);
COMMIT;
EXCEPTION
WHEN division_by_zero THEN
RAISE NOTICE 'caught division_by_zero';
END;
END;
$$;
SELECT * FROM test1;
-- rollback inside block with exception handler
TRUNCATE test1;
DO LANGUAGE plpgsql $$
BEGIN
BEGIN
INSERT INTO test1 (a) VALUES (1);
ROLLBACK;
INSERT INTO test1 (a) VALUES (1/0);
ROLLBACK;
EXCEPTION
WHEN division_by_zero THEN
RAISE NOTICE 'caught division_by_zero';
END;
END;
$$;
SELECT * FROM test1;
-- COMMIT failures
DO LANGUAGE plpgsql $$
BEGIN
CREATE TABLE test3 (y int UNIQUE DEFERRABLE INITIALLY DEFERRED);
COMMIT;
INSERT INTO test3 (y) VALUES (1);
COMMIT;
INSERT INTO test3 (y) VALUES (1);
INSERT INTO test3 (y) VALUES (2);
COMMIT;
INSERT INTO test3 (y) VALUES (3); -- won't get here
END;
$$;
SELECT * FROM test3;
-- failure while trying to persist a cursor across a transaction (bug #15703)
CREATE PROCEDURE cursor_fail_during_commit()
LANGUAGE plpgsql
AS $$
DECLARE id int;
BEGIN
FOR id IN SELECT 1/(x-1000) FROM generate_series(1,1000) x LOOP
INSERT INTO test1 VALUES(id);
COMMIT;
END LOOP;
END;
$$;
TRUNCATE test1;
CALL cursor_fail_during_commit();
-- note that error occurs during first COMMIT, hence nothing is in test1
SELECT count(*) FROM test1;
CREATE PROCEDURE cursor_fail_during_rollback()
LANGUAGE plpgsql
AS $$
DECLARE id int;
BEGIN
FOR id IN SELECT 1/(x-1000) FROM generate_series(1,1000) x LOOP
INSERT INTO test1 VALUES(id);
ROLLBACK;
END LOOP;
END;
$$;
TRUNCATE test1;
CALL cursor_fail_during_rollback();
SELECT count(*) FROM test1;
-- SET TRANSACTION
DO LANGUAGE plpgsql $$
BEGIN
PERFORM 1;
RAISE INFO '%', current_setting('transaction_isolation');
COMMIT;
SET TRANSACTION ISOLATION LEVEL REPEATABLE READ;
PERFORM 1;
RAISE INFO '%', current_setting('transaction_isolation');
COMMIT;
SET TRANSACTION ISOLATION LEVEL REPEATABLE READ;
RESET TRANSACTION ISOLATION LEVEL;
PERFORM 1;
RAISE INFO '%', current_setting('transaction_isolation');
COMMIT;
END;
$$;
-- error cases
DO LANGUAGE plpgsql $$
BEGIN
SET TRANSACTION ISOLATION LEVEL REPEATABLE READ;
END;
$$;
DO LANGUAGE plpgsql $$
BEGIN
SAVEPOINT foo;
END;
$$;
DO LANGUAGE plpgsql $$
BEGIN
EXECUTE 'COMMIT';
END;
$$;
-- snapshot handling test
TRUNCATE test2;
CREATE PROCEDURE transaction_test9()
LANGUAGE SQL
AS $$
INSERT INTO test2 VALUES (42);
$$;
DO LANGUAGE plpgsql $$
BEGIN
ROLLBACK;
CALL transaction_test9();
END
$$;
SELECT * FROM test2;
-- Test transaction in procedure with output parameters. This uses a
-- different portal strategy and different code paths in pquery.c.
CREATE PROCEDURE transaction_test10a(INOUT x int)
LANGUAGE plpgsql
AS $$
BEGIN
x := x + 1;
COMMIT;
END;
$$;
CALL transaction_test10a(10);
CREATE PROCEDURE transaction_test10b(INOUT x int)
LANGUAGE plpgsql
AS $$
BEGIN
x := x - 1;
ROLLBACK;
END;
$$;
CALL transaction_test10b(10);
-- transaction timestamp vs. statement timestamp
CREATE PROCEDURE transaction_test11()
LANGUAGE plpgsql
AS $$
DECLARE
s1 timestamp with time zone;
s2 timestamp with time zone;
s3 timestamp with time zone;
t1 timestamp with time zone;
t2 timestamp with time zone;
t3 timestamp with time zone;
BEGIN
s1 := statement_timestamp();
t1 := transaction_timestamp();
ASSERT s1 = t1;
PERFORM pg_sleep(0.001);
COMMIT;
s2 := statement_timestamp();
t2 := transaction_timestamp();
ASSERT s2 = s1;
ASSERT t2 > t1;
PERFORM pg_sleep(0.001);
ROLLBACK;
s3 := statement_timestamp();
t3 := transaction_timestamp();
ASSERT s3 = s1;
ASSERT t3 > t2;
END;
$$;
CALL transaction_test11();
-- transaction chain
TRUNCATE test1;
DO LANGUAGE plpgsql $$
BEGIN
ROLLBACK;
SET TRANSACTION ISOLATION LEVEL REPEATABLE READ;
FOR i IN 0..3 LOOP
RAISE INFO 'transaction_isolation = %', current_setting('transaction_isolation');
INSERT INTO test1 (a) VALUES (i);
IF i % 2 = 0 THEN
COMMIT AND CHAIN;
ELSE
ROLLBACK AND CHAIN;
END IF;
END LOOP;
END
$$;
SELECT * FROM test1;
DROP TABLE test1;
DROP TABLE test2;
DROP TABLE test3;