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--
-- TRANSACTIONS
--
BEGIN;
SELECT *
INTO TABLE xacttest
FROM aggtest;
INSERT INTO xacttest (a, b) VALUES (777, 777.777);
END;
-- should retrieve one value--
SELECT a FROM xacttest WHERE a > 100;
a
-----
777
(1 row)
BEGIN;
CREATE TABLE disappear (a int4);
DELETE FROM aggtest;
-- should be empty
SELECT * FROM aggtest;
a | b
---+---
(0 rows)
ABORT;
-- should not exist
SELECT oid FROM pg_class WHERE relname = 'disappear';
oid
-----
(0 rows)
-- should have members again
SELECT * FROM aggtest;
a | b
-----+---------
56 | 7.8
100 | 99.097
0 | 0.09561
42 | 324.78
(4 rows)
-- Read-only tests
CREATE TABLE writetest (a int);
CREATE TEMPORARY TABLE temptest (a int);
SET SESSION CHARACTERISTICS AS TRANSACTION READ ONLY;
DROP TABLE writetest; -- fail
ERROR: transaction is read-only
INSERT INTO writetest VALUES (1); -- fail
ERROR: transaction is read-only
SELECT * FROM writetest; -- ok
a
---
(0 rows)
DELETE FROM temptest; -- ok
UPDATE temptest SET a = 0 WHERE a = 1 AND writetest.a = temptest.a; -- ok
PREPARE test AS UPDATE writetest SET a = 0; -- ok
EXECUTE test; -- fail
ERROR: transaction is read-only
SELECT * FROM writetest, temptest; -- ok
a | a
---+---
(0 rows)
CREATE TABLE test AS SELECT * FROM writetest; -- fail
ERROR: transaction is read-only
START TRANSACTION READ WRITE;
DROP TABLE writetest; -- ok
COMMIT;
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