config root man

################################################################################
#
# UPDATE using multiple statements. Subtract a value (4) from one field, then
# add the same value to another field in the same row.
#
# Mind any tx errors, ROLLBACK if needed to "equalize" different engines.
#
################################################################################

SET autocommit = 0;
START TRANSACTION;
eval SET @conn_id = CONNECTION_ID(), @thread_id = 0;

--error 0, ER_LOCK_DEADLOCK, ER_LOCK_WAIT_TIMEOUT, ER_CHECKREAD
UPDATE t1 SET `int1` = `int1` - 4, 
              `id` = 4,
              `is_consistent` = 0,
              `connection_id` = @conn_id,
              `thread_id` = @thread_id
    WHERE `pk` = 4;

--source suite/engines/rr_trx/include/check_for_error_rollback.inc

--echo *** UPDATEing row with pk = 4 and `int1_key` +=4 if above statement succeeded (query log disabled)...

if (!$error)
{
    # This is conditional, so disable query log to avoid irrelevant diffs.
    --disable_query_log
    --error 0, ER_LOCK_DEADLOCK, ER_LOCK_WAIT_TIMEOUT, ER_CHECKREAD
    UPDATE t1 SET `int1_key` = `int1_key` + 4,
                  `is_consistent` = 1,
                  `connection_id` = @conn_id,
                  `thread_id` = @thread_id
        WHERE `pk` = 4;

    --source suite/engines/rr_trx/include/check_for_error_rollback.inc
    --enable_query_log
}

COMMIT;