subselect clean up

fix after automerge

sql/item_strfunc.cc

@@ -1922,7 +1922,7 @@ bool Item_func_conv_charset::fix_fields(THD *thd,struct st_table_list *tables)
   
   if (thd && check_stack_overrun(thd,buff))
     return 0;					// Fatal error if flag is set!
-  if (args[0]->fix_fields(thd,tables))
+  if (args[0]->fix_fields(thd, tables, args))
     return 1;
   maybe_null=args[0]->maybe_null;
   binary=args[0]->binary;

sql/sql_lex.h

@@ -240,6 +240,7 @@ typedef struct st_select_lex_unit SELECT_LEX_UNIT;
 /*
   SELECT_LEX - store information of parsed SELECT_LEX statment
 */
+class JOIN;
 class st_select_lex: public st_select_lex_node {
 public:
   char *db, *db1, *table1, *db2, *table2;      	/* For outer join using .. */
@@ -251,12 +252,13 @@ public:
   List<String>        interval_list, use_index, *use_index_ptr,
 		      ignore_index, *ignore_index_ptr;
   List<Item_func_match> ftfunc_list;
+  JOIN *join; /* after JOIN::prepare it is pointer to corresponding JOIN */
   uint in_sum_expr;
   bool	create_refs, 
     braces,   /* SELECT ... UNION (SELECT ... ) <- this braces */
     depended, /* depended from outer select subselect */
     /* TRUE when having fix field called in processing of this SELECT */
-    having_fix_field; 
+    having_fix_field;e
 
   void init_query();
   void init_select();

sql/sql_select.cc

@@ -211,6 +211,7 @@ JOIN::prepare(TABLE_LIST *tables_init,
   proc_param= proc_param_init;
   tables_list= tables_init;
   select_lex= select;
+  select->join= this;
   union_part= (unit->first_select()->next_select() != 0);
   
   /* Check that all tables, fields, conds and order are ok */
@@ -974,6 +975,21 @@ JOIN::cleanup(THD *thd)
   delete select;
   delete_dynamic(&keyuse);
   delete procedure;
+  for (SELECT_LEX_UNIT *unit= select_lex->first_inner_unit();
+       unit != 0;
+       unit= unit->next_unit())
+    for (SELECT_LEX *sl= unit->first_select();
+	 sl != 0;
+	 sl= sl->next_select())
+    {
+      if (sl->join)
+      {
+	int err= sl->join->cleanup(thd);
+	if (err)
+	  error= err;
+	sl->join= 0;
+      }
+    }
   return error;
 }