MWL#90: Subqueries: Inside-out execution for non-semijoin materialized

subqueries that are AND-parts of the WHERE
- First code (needs cleanup).

sql/sql_join_cache.cc

@@ -33,6 +33,7 @@
 
 #define NO_MORE_RECORDS_IN_BUFFER  (uint)(-1)
 
+int do_jtbm_materialization_if_needed(JOIN_TAB *tab);
 
 /*****************************************************************************
  *  Join cache module
@@ -1778,6 +1779,10 @@ enum_nested_loop_state JOIN_CACHE_BNL::join_matching_records(bool skip_last)
   }
 
   /* Start retrieving all records of the joined table */
+  
+  //jtbm-todo: error handling!
+  do_jtbm_materialization_if_needed(join_tab);
+
   if ((error= join_init_read_record(join_tab))) 
   {
     rc= error < 0 ? NESTED_LOOP_NO_MORE_ROWS: NESTED_LOOP_ERROR;