diff options
Diffstat (limited to 'sql/mdl.h')
| -rw-r--r-- | sql/mdl.h | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/sql/mdl.h b/sql/mdl.h index ad3945f524c..5c58289aea2 100644 --- a/sql/mdl.h +++ b/sql/mdl.h @@ -40,15 +40,16 @@ class Deadlock_detection_visitor; Type of metadata lock request. @sa Comments for MDL_object_lock::can_grant_lock() and - MDL_global_lock::can_grant_lock() for details. + MDL_scoped_lock::can_grant_lock() for details. */ enum enum_mdl_type { /* - An intention exclusive metadata lock. Used only for global locks. + An intention exclusive metadata lock. Used only for scoped locks. Owner of this type of lock can acquire upgradable exclusive locks on individual objects. - Compatible with other IX locks, but is incompatible with global S lock. + Compatible with other IX locks, but is incompatible with scoped S and + X locks. */ MDL_INTENTION_EXCLUSIVE= 0, /* @@ -179,6 +180,7 @@ public: MDL_key is also used outside of the MDL subsystem. */ enum enum_mdl_namespace { GLOBAL=0, + SCHEMA, TABLE, FUNCTION, PROCEDURE, @@ -646,6 +648,8 @@ private: closes all open HANDLERs. However, one can open a few HANDLERs after entering the read only mode. + * LOCK TABLES locks include intention exclusive locks on + involved schemas. */ Ticket_list m_tickets; /** |