BEGIN TRANSACTION ISOLATION LEVEL SERIALIZABLE; SELECT pg_sleep(3); INSERT INTO disttab VALUES(21,21); INSERT INTO disttab VALUES(22,22); INSERT INTO disttab VALUES(23,23); INSERT INTO disttab VALUES(24,24); INSERT INTO disttab VALUES(25,25); INSERT INTO disttab VALUES(26,26); INSERT INTO disttab VALUES(27,27); INSERT INTO disttab VALUES(28,28); INSERT INTO disttab VALUES(29,29); INSERT INTO disttab VALUES(30,30); INSERT INTO disttab VALUES(31,31); INSERT INTO disttab VALUES(32,32); INSERT INTO disttab VALUES(33,33); INSERT INTO disttab VALUES(34,34); INSERT INTO disttab VALUES(35,35); INSERT INTO disttab VALUES(36,36); INSERT INTO disttab VALUES(37,37); INSERT INTO disttab VALUES(38,38); INSERT INTO disttab VALUES(39,39); INSERT INTO disttab VALUES(40,40); PREPARE TRANSACTION 'foo4';