1 files changed, 9 insertions, 0 deletions
diff --git a/sql/sql_lex.h b/sql/sql_lex.h
index 0eefe031c8d..f34a1c7c36f 100644
--- a/sql/sql_lex.h
+++ b/sql/sql_lex.h
@@ -688,6 +688,15 @@ public:
   int cur_pos_in_select_list;
 
   List<udf_func>     udf_list;                  /* udf function calls stack */
+
+  /**
+    Per sub-query locking strategy.
+    Note: This variable might interfer with the corresponding statement-level
+    variable Lex::lock_option because on how different parser rules depend
+    on eachother.
+  */
+  thr_lock_type lock_option;
+
   /* 
     This is a copy of the original JOIN USING list that comes from
     the parser. The parser :