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| author | Konstantin Osipov <kostja@sun.com> | 2009-12-08 12:57:07 +0300 |
|---|---|---|
| committer | Konstantin Osipov <kostja@sun.com> | 2009-12-08 12:57:07 +0300 |
| commit | a66a2608ae4d70a3f9b3d41e38cfb97eb616bed3 (patch) | |
| tree | b2b94a32418f0728974d2bad4d3fa70acc2d75ef /sql/sql_help.cc | |
| parent | 4a8a1c568d8785dc608cc111e74e1ed389f1353e (diff) | |
| download | mariadb-git-a66a2608ae4d70a3f9b3d41e38cfb97eb616bed3.tar.gz | |
Backport of:
----------------------------------------------------------
revno: 2617.69.20
committer: Konstantin Osipov <kostja@sun.com>
branch nick: 5.4-4284-1-assert
timestamp: Thu 2009-08-13 18:29:55 +0400
message:
WL#4284 "Transactional DDL locking"
A review fix.
Since WL#4284 implementation separated MDL_request and MDL_ticket,
MDL_request becamse a utility object necessary only to get a ticket.
Store it by-value in TABLE_LIST with the intent to merge
MDL_request::key with table_list->table_name and table_list->db
in future.
Change the MDL subsystem to not require MDL_requests to
stay around till close_thread_tables().
Remove the list of requests from the MDL context.
Requests for shared metadata locks acquired in open_tables()
are only used as a list in recover_from_failed_open_table_attempt(),
which calls mdl_context.wait_for_locks() for this list.
To keep such list for recover_from_failed_open_table_attempt(),
introduce a context class (Open_table_context), that collects
all requests.
A lot of minor cleanups and simplications that became possible
with this change.
Diffstat (limited to 'sql/sql_help.cc')
| -rw-r--r-- | sql/sql_help.cc | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/sql/sql_help.cc b/sql/sql_help.cc index 003741a7ddc..af67db45b36 100644 --- a/sql/sql_help.cc +++ b/sql/sql_help.cc @@ -653,6 +653,7 @@ bool mysqld_help(THD *thd, const char *mask) tables[3].alias= tables[3].table_name= (char*) "help_keyword"; tables[3].lock_type= TL_READ; tables[0].db= tables[1].db= tables[2].db= tables[3].db= (char*) "mysql"; + init_mdl_requests(tables); Open_tables_state open_tables_state_backup; if (open_system_tables_for_read(thd, tables, &open_tables_state_backup)) |