BEGIN TRANSACTION ISOLATION LEVEL SERIALIZABLE;
INSERT INTO pxtest1 VALUES ('fff');
-SELECT * FROM pxtest1;
- foobar
---------
- aaa
- fff
-(2 rows)
-
-- This should fail, because the gid foo3 is already in use
PREPARE TRANSACTION 'foo3';
ERROR: prepared transactions are disabled
aaa
(1 row)
+-- Test serialization failure (SSI)
+BEGIN TRANSACTION ISOLATION LEVEL SERIALIZABLE;
+UPDATE pxtest1 SET foobar = 'eee' WHERE foobar = 'ddd';
+SELECT * FROM pxtest1;
+ foobar
+--------
+ aaa
+(1 row)
+
+PREPARE TRANSACTION 'foo4';
+ERROR: prepared transactions are disabled
+HINT: Set max_prepared_transactions to a nonzero value.
+SELECT gid FROM pg_prepared_xacts;
+ gid
+-----
+(0 rows)
+
+BEGIN TRANSACTION ISOLATION LEVEL SERIALIZABLE;
+SELECT * FROM pxtest1;
+ foobar
+--------
+ aaa
+(1 row)
+
+INSERT INTO pxtest1 VALUES ('fff');
+-- This should fail, because the two transactions have a write-skew anomaly
+PREPARE TRANSACTION 'foo5';
+ERROR: prepared transactions are disabled
+HINT: Set max_prepared_transactions to a nonzero value.
+SELECT gid FROM pg_prepared_xacts;
+ gid
+-----
+(0 rows)
+
+ROLLBACK PREPARED 'foo4';
+ERROR: prepared transaction with identifier "foo4" does not exist
+SELECT gid FROM pg_prepared_xacts;
+ gid
+-----
+(0 rows)
+
-- Clean up
DROP TABLE pxtest1;
-- Test subtransactions