MDEV-13331 FK DELETE CASCADE does not honor innodb_lock_wait_timeout
row_ins_check_foreign_constraint(): On timeout, return DB_LOCK_WAIT_TIMEOUT instead of DB_LOCK_WAIT, so that the lock wait will be properly terminated. Also, replace some redundant assignments. It looks like this bug was introduced in MySQL 5.7.8 by: commit a97f6b91227c7e0fc3151cfe5421891e79c12d19 Author: Annamalai Gurusami <annamalai.gurusami@oracle.com> Date: Tue Jun 9 16:02:31 2015 +0530 Bug #20953265 INNODB: FAILING ASSERTION: RESULT != FTS_INVALID
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