MWL#182: Explain running statements

- Merge with 5.3-main

1 files changed, 10 insertions, 1 deletions

diff --git a/sql/sql_select.h b/sql/sql_select.h
index 0a416966995..78decaae039 100644
--- a/sql/sql_select.h
+++ b/sql/sql_select.h
@@ -958,7 +958,7 @@ public:
   const char *zero_result_cause; ///< not 0 if exec must return zero result
   
   bool union_part; ///< this subselect is part of union 
-  bool optimized; ///< flag to avoid double optimization in EXPLAIN
+  int  optimized; ///< flag to avoid double optimization in EXPLAIN
   bool initialized; ///< flag to avoid double init_execution calls
 
   /*
@@ -1069,9 +1069,11 @@ public:
 	      SELECT_LEX_UNIT *unit);
   bool prepare_stage2();
   int optimize();
+  int optimize_inner();
   int reinit();
   int init_execution();
   void exec();
+  void exec_inner();
   int destroy();
   void restore_tmp();
   bool alloc_func_list();
@@ -1162,6 +1164,10 @@ public:
   {
     return (unit->item && unit->item->is_in_predicate());
   }
+
+  int print_explain(select_result_sink *result, bool on_the_fly,
+                     bool need_tmp_table, bool need_order,
+                     bool distinct,const char *message);
 private:
   /**
     TRUE if the query contains an aggregate function but has no GROUP
@@ -1454,6 +1460,9 @@ inline bool optimizer_flag(THD *thd, uint flag)
   return (thd->variables.optimizer_switch & flag);
 }
 
+int print_fake_select_lex_join(select_result_sink *result, bool on_the_fly,
+                               SELECT_LEX *select_lex, uint8 select_options);
+
 /* Table elimination entry point function */
 void eliminate_tables(JOIN *join);