diff options
Diffstat (limited to 'sql/sql_lex.h')
| -rw-r--r-- | sql/sql_lex.h | 16 |
1 files changed, 0 insertions, 16 deletions
diff --git a/sql/sql_lex.h b/sql/sql_lex.h index c20c2f0bca2..191562bd3e8 100644 --- a/sql/sql_lex.h +++ b/sql/sql_lex.h @@ -2394,22 +2394,6 @@ struct LEX: public Query_tables_list bool escape_used; bool is_lex_started; /* If lex_start() did run. For debugging. */ - /* - Special case for SELECT .. FOR UPDATE and LOCK TABLES .. WRITE. - - Protect from a impending GRL as otherwise the thread might deadlock - if it starts waiting for the GRL in mysql_lock_tables. - - The protection is needed because there is a race between setting - the global read lock and waiting for all open tables to be closed. - The problem is a circular wait where a thread holding "old" open - tables will wait for the global read lock to be released while the - thread holding the global read lock will wait for all "old" open - tables to be closed -- the flush part of flush tables with read - lock. - */ - bool protect_against_global_read_lock; - LEX(); virtual ~LEX() |