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Combine GLOBAL and COMMIT namespaces into BACKUP namespace.

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Part of MDEV-5336 Implement LOCK FOR BACKUP

Other things:
- Added printing of MDL locks to DBUG.
This commit is contained in:
Sergey Vojtovich
2018-10-30 00:09:02 +04:00
committed by Monty
parent 7fb9d64989
commit 7a9dfdd8d9
28 changed files with 377 additions and 245 deletions
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8
sql/sql_table.cc
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@ -9191,12 +9191,12 @@ bool mysql_alter_table(THD *thd, const LEX_CSTRING *new_db,
}
/*
Global intention exclusive lock must have been already acquired when
table to be altered was open, so there is no need to do it here.
Protection against global read lock must have been acquired when table
to be altered was being opened.
*/
DBUG_ASSERT(thd->mdl_context.is_lock_owner(MDL_key::GLOBAL,
DBUG_ASSERT(thd->mdl_context.is_lock_owner(MDL_key::BACKUP,
"", "",
MDL_INTENTION_EXCLUSIVE));
MDL_BACKUP_STMT));
if (thd->mdl_context.acquire_locks(&mdl_requests,
thd->variables.lock_wait_timeout))