--
-- Testing we handle transactions properly
--
CREATE TABLE t(a int, b int) USING cstore_tableam;
INSERT INTO t SELECT i, 2 * i FROM generate_series(1, 3) i;
SELECT * FROM t ORDER BY a;
 a | b
---------------------------------------------------------------------
 1 | 2
 2 | 4
 3 | 6
(3 rows)

-- verify that table rewrites work properly
BEGIN;
ALTER TABLE t ALTER COLUMN b TYPE float4 USING (b + 0.5)::float4;
INSERT INTO t VALUES (4, 8.5);
SELECT * FROM t ORDER BY a;
 a |  b
---------------------------------------------------------------------
 1 | 2.5
 2 | 4.5
 3 | 6.5
 4 | 8.5
(4 rows)

ROLLBACK;
SELECT * FROM t ORDER BY a;
 a | b
---------------------------------------------------------------------
 1 | 2
 2 | 4
 3 | 6
(3 rows)

-- verify truncate rollback
BEGIN;
TRUNCATE t;
INSERT INTO t VALUES (4, 8);
SELECT * FROM t ORDER BY a;
 a | b
---------------------------------------------------------------------
 4 | 8
(1 row)

SAVEPOINT s1;
TRUNCATE t;
SELECT * FROM t ORDER BY a;
 a | b
---------------------------------------------------------------------
(0 rows)

ROLLBACK TO SAVEPOINT s1;
SELECT * FROM t ORDER BY a;
 a | b
---------------------------------------------------------------------
 4 | 8
(1 row)

ROLLBACK;
-- verify truncate with unflushed data in upper xacts
BEGIN;
INSERT INTO t VALUES (4, 8);
SAVEPOINT s1;
TRUNCATE t;
ROLLBACK TO SAVEPOINT s1;
COMMIT;
SELECT * FROM t ORDER BY a;
 a | b
---------------------------------------------------------------------
 1 | 2
 2 | 4
 3 | 6
 4 | 8
(4 rows)

-- verify DROP TABLE rollback
BEGIN;
INSERT INTO t VALUES (5, 10);
SELECT * FROM t ORDER BY a;
 a | b
---------------------------------------------------------------------
 1 |  2
 2 |  4
 3 |  6
 4 |  8
 5 | 10
(5 rows)

SAVEPOINT s1;
DROP TABLE t;
SELECT * FROM t ORDER BY a;
ERROR:  relation "t" does not exist
ROLLBACK TO SAVEPOINT s1;
SELECT * FROM t ORDER BY a;
 a | b
---------------------------------------------------------------------
 1 |  2
 2 |  4
 3 |  6
 4 |  8
 5 | 10
(5 rows)

ROLLBACK;
-- verify DROP TABLE with unflushed data in upper xacts
BEGIN;
INSERT INTO t VALUES (5, 10);
SAVEPOINT s1;
DROP TABLE t;
SELECT * FROM t ORDER BY a;
ERROR:  relation "t" does not exist
ROLLBACK TO SAVEPOINT s1;
COMMIT;
SELECT * FROM t ORDER BY a;
 a | b
---------------------------------------------------------------------
 1 |  2
 2 |  4
 3 |  6
 4 |  8
 5 | 10
(5 rows)

-- verify SELECT when unflushed data in upper transactions errors.
BEGIN;
INSERT INTO t VALUES (6, 12);
SAVEPOINT s1;
SELECT * FROM t;
ERROR:  cannot read from table when there is unflushed data in upper transactions
ROLLBACK;
SELECT * FROM t ORDER BY a;
 a | b
---------------------------------------------------------------------
 1 |  2
 2 |  4
 3 |  6
 4 |  8
 5 | 10
(5 rows)

DROP TABLE t;