Marko Mäkelä 10590dd39c MDEV-15199 Referential integrity broken in ON DELETE CASCADE ... MDEV-14222 Unnecessary 'cascade' memory allocation for every updated row when there is no FOREIGN KEY This reverts the MySQL 5.7.2 change 377774689b which introduced these problems. MariaDB 10.2.2 inherited these problems in commit 2e814d4702. The FOREIGN KEY CASCADE and SET NULL operations implemented as procedural recursion are consuming more than 8 kilobytes of stack (9 stack frames) per iteration in a non-debug GNU/Linux AMD64 build. This is why we need to limit the maximum recursion depth to 15 steps instead of the 255 that it used to be in MySQL 5.7 and MariaDB 10.2. A corresponding change was made in MySQL 5.7.21 in 7b26dc98a6		2018-02-07 10:39:12 +02:00
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que0que.cc	MDEV-15199 Referential integrity broken in ON DELETE CASCADE	2018-02-07 10:39:12 +02:00