File: cursor-restore-unique-null.test

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--source include/have_innodb.inc
--source include/have_debug.inc
--source include/have_debug_sync.inc
--source include/count_sessions.inc


CREATE TABLE t(a INT PRIMARY KEY, b INT, c INT, UNIQUE KEY `b_c` (`b`,`c`))
  ENGINE=InnoDB, STATS_PERSISTENT=0;
INSERT INTO t SET a = 1, c = 2;

--connect con1,localhost,root
BEGIN;
  INSERT INTO t SET a=2, c=2;

--connection default
BEGIN;
SET DEBUG_SYNC="lock_wait_start SIGNAL select_locked";
--send SELECT * FROM t FORCE INDEX(b) FOR UPDATE

--connection con1
SET DEBUG_SYNC="now WAIT_FOR select_locked";
ROLLBACK;

--connection default
--echo # If the bug is not fixed, and the both unique index key fields are
--echo # NULL, there will be two (1, NULL, 2) rows in the result,
--echo # because cursor will be restored to (NULL, 2, 1) position for
--echo # secondary key instead of "supremum".
--reap
COMMIT;

SET DEBUG_SYNC="RESET";

--disconnect con1
DROP TABLE t;
--source include/wait_until_count_sessions.inc