5 Commits

Author	SHA1	Message	Date
Sergei Golubchik	9180e8666b	MDEV-16465 Invalid (old?) table or database name or hang in ha_innobase::delete_table and log semaphore wait upon concurrent DDL with foreign keys ... ALTER TABLE locks the table with TL_READ_NO_INSERT, to prevent the source table modifications while it's being copied. But there's an indirect way of modifying a table, via cascade FK actions. After previous commits, an attempt to modify an FK parent table will cause FK children to be prelocked, so the table-being-altered cannot be modified by a cascade FK action, because ALTER holds a lock and prelocking will wait. But if a new FK is being added by this very ALTER, then the target table is not locked yet (it's a temporary table). So, we have to lock FK parents explicitly.	2018-09-04 09:49:53 +02:00
Sergei Golubchik	64a23c1c8a	extend prelocking to FK-accessed tables ... Backport of f136291098	2018-09-04 08:37:44 +02:00
Sergei Golubchik	ae0c576d46	Merge branch 'merge/merge-xtradb-5.5' into bb-5.5-serg ... update tests	2015-06-05 02:14:49 +02:00
Sergei Golubchik	7989c62bc0	post-merge fixes	2014-10-07 10:53:06 +02:00
Murthy Narkedimilli	3139aa87b4	Adding patch for security bug 19471516	2014-09-08 11:33:55 +02:00