#
# Testcase for InnoDB
# Bug#42419 Server crash with "Pure virtual method called" on two concurrent connections
#

--source include/have_innodb.inc

let $innodb_lock_wait_timeout= query_get_value(SHOW VARIABLES LIKE 'innodb_lock_wait_timeout%', Value, 1);
if (`SELECT $innodb_lock_wait_timeout < 10`)
{
   --echo # innodb_lock_wait_timeout must be >= 10 seconds
   --echo # so that this test can work all time fine on an overloaded testing box
   SHOW VARIABLES LIKE 'innodb_lock_wait_timeout';
   exit;
}

# Save the initial number of concurrent sessions
--source include/count_sessions.inc

# First session
connection default;


--enable_warnings
CREATE TABLE t1 (a INT AUTO_INCREMENT PRIMARY KEY, b INT) ENGINE = InnoDB;

INSERT INTO t1 VALUES (1,1),(2,2),(3,3);
COMMIT;
SET AUTOCOMMIT = 0;

CREATE TEMPORARY TABLE t1_tmp ( b INT );

INSERT INTO t1_tmp (b) SELECT b FROM t1 WHERE a = 3;
INSERT INTO t1_tmp (b) SELECT b FROM t1 WHERE a = 2;

# Second session
connect (user2,localhost,root,,,$MASTER_MYPORT,$MASTER_MYSOCK);

SET AUTOCOMMIT = 0;

CREATE TEMPORARY TABLE t2_tmp ( a int, new_a int );
INSERT INTO t2_tmp VALUES (1,51),(2,52),(3,53);

UPDATE t1 SET a = (SELECT new_a FROM t2_tmp WHERE t2_tmp.a = t1.a) WHERE a = 1;
send
UPDATE t1 SET a = (SELECT new_a FROM t2_tmp WHERE t2_tmp.a = t1.a) WHERE a = 2;

# The last update will wait for a lock held by the first session

# First session
connection default;

# Poll till the UPDATE of the second session waits for lock
let $show_statement= SHOW PROCESSLIST;
let $field= State;
let $condition= = 'Updating';
--source include/wait_show_condition.inc

# If the testing box is overloadeded and innodb_lock_wait_timeout is too small
# we might get here ER_LOCK_WAIT_TIMEOUT.
--error ER_LOCK_DEADLOCK
INSERT INTO t1_tmp (b) SELECT b FROM t1 WHERE a = 1;

# Second session
connection user2;
--echo Reap the server message for connection user2 UPDATE t1 ...
reap;

# The server crashed when executing this UPDATE or the succeeding SQL command.
UPDATE t1 SET a = (SELECT new_a FROM t2_tmp WHERE t2_tmp.a = t1.a) WHERE a = 3;

connection default;
disconnect user2;
DROP TABLE t1;

# Wait till all disconnects are completed
--source include/wait_until_count_sessions.inc
