Merge rurik.mysql.com:/home/igor/dev/mysql-4.1-0

into  rurik.mysql.com:/home/igor/dev/mysql-5.0-0


mysql-test/t/having.test:
  Auto merged
mysql-test/r/having.result:
  Manual merge
sql/sql_lex.cc:
  Manual merge
sql/sql_lex.h:
  Manual merge
sql/sql_prepare.cc:
  Manual merge
sql/sql_select.cc:
  Manual merge

sql/sql_prepare.cc

@@ -1862,6 +1862,96 @@ void mysql_stmt_prepare(THD *thd, const char *packet, uint packet_length)
   {
     /* Statement map deletes statement on erase */
     thd->stmt_map.erase(stmt);
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   }
   else
     mysql_log.write(thd, COM_STMT_PREPARE, "[%lu] %s", stmt->id, packet);
@@ -1955,11 +2045,14 @@ static const char *get_dynamic_sql_string(LEX *lex, uint *query_len)
   }
   else
   {
-    query_str= lex->prepared_stmt_code.str;
-    *query_len= lex->prepared_stmt_code.length;
-  }
-end:
-  return query_str;
+    stmt->setup_set_params();
+    SELECT_LEX *sl= stmt->lex->all_selects_list;
+    for (; sl; sl= sl->next_select_in_list())
+    {
+      /*
+        during query optimisation.
+      */
+      sl->prep_where= sl->where;
 }
 
 
@@ -2066,14 +2159,19 @@ void reinit_stmt_before_use(THD *thd, LEX *lex)
       sl->exclude_from_table_unique_test= FALSE;
 
       /*
-        Copy WHERE clause pointers to avoid damaging they by optimisation
+        Copy WHERE, HAVING clause pointers to avoid damaging them by optimisation
       */
-      if (sl->prep_where)
-      {
-        sl->where= sl->prep_where->copy_andor_structure(thd);
-        sl->where->cleanup();
-      }
-      DBUG_ASSERT(sl->join == 0);
+     if (sl->prep_where)
+     {
+       sl->where= sl->prep_where->copy_andor_structure(thd);
+       sl->where->cleanup();
+     }
+     if (sl->prep_having)
+     {
+       sl->having= sl->prep_having->copy_andor_structure(thd);
+       sl->having->cleanup();
+     }
+     DBUG_ASSERT(sl->join == 0);
       ORDER *order;
       /* Fix GROUP list */
       for (order= (ORDER *)sl->group_list.first; order; order= order->next)