fixed bug of derived table in subselect

fixed bug in error handling


mysql-test/r/subselect.result:
  test of error handling
  test of derived tables inside subselect
mysql-test/t/subselect.test:
  test of error handling
  test of derived tables inside subselect
sql/sql_class.cc:
  fixed error handling error
sql/sql_lex.h:
  fifex layout
sql/sql_parse.cc:
  fixed processing of derived tables
sql/sql_select.cc:
  more quick abort on error

mysql-test/r/subselect.result

@@ -256,4 +256,12 @@ UNIQUE KEY `maxnumrep` (`maxnumrep`)
 INSERT INTO forumconthardwarefr7 (numeropost,maxnumrep) VALUES (1,0),(2,1);
 select numeropost as a FROM forumconthardwarefr7 GROUP BY (SELECT 1 FROM forumconthardwarefr7 HAVING a=1);
 Subselect returns more than 1 record
+select numeropost as a FROM forumconthardwarefr7 ORDER BY (SELECT 1 FROM forumconthardwarefr7 HAVING a=1);
+Subselect returns more than 1 record
 drop table if exists forumconthardwarefr7;
+drop table if exists iftest;
+CREATE TABLE iftest (field char(1) NOT NULL DEFAULT 'b');
+INSERT INTO iftest VALUES ();
+SELECT field FROM iftest WHERE 1=(SELECT 1 UNION ALL SELECT 1 FROM (SELECT 1) HAVING field='b');
+Subselect returns more than 1 record
+drop table iftest;

mysql-test/t/subselect.test

@@ -152,4 +152,13 @@ CREATE TABLE `forumconthardwarefr7` (
 INSERT INTO forumconthardwarefr7 (numeropost,maxnumrep) VALUES (1,0),(2,1);
 -- error 1240
 select numeropost as a FROM forumconthardwarefr7 GROUP BY (SELECT 1 FROM forumconthardwarefr7 HAVING a=1);
-drop table if exists forumconthardwarefr7;
+-- error 1240
\ No newline at end of file
+select numeropost as a FROM forumconthardwarefr7 ORDER BY (SELECT 1 FROM forumconthardwarefr7 HAVING a=1);
+drop table if exists forumconthardwarefr7;
+
+drop table if exists iftest;
+CREATE TABLE iftest (field char(1) NOT NULL DEFAULT 'b');
+INSERT INTO iftest VALUES ();
+-- error 1240
+SELECT field FROM iftest WHERE 1=(SELECT 1 UNION ALL SELECT 1 FROM (SELECT 1) HAVING field='b');
+drop table iftest;

sql/sql_class.cc

@@ -873,7 +873,6 @@ bool select_singleval_subselect::send_data(List<Item> &items)
   DBUG_ENTER("select_singleval_subselect::send_data");
   Item_singleval_subselect *it= (Item_singleval_subselect *)item;
   if (it->assigned()){
-    thd->fatal_error= 1;
     my_message(ER_SUBSELECT_NO_1_ROW, ER(ER_SUBSELECT_NO_1_ROW), MYF(0));
     DBUG_RETURN(1);
   }

sql/sql_lex.h

@@ -336,7 +336,7 @@ public:
   }
   st_select_lex* outer_select();
   st_select_lex* next_select() { return (st_select_lex*) next; }
-  st_select_lex*  next_select_in_list() 
+  st_select_lex* next_select_in_list() 
   {
     return (st_select_lex*) link_next;
   }

sql/sql_parse.cc

@@ -1334,17 +1334,20 @@ mysql_execute_command(THD *thd)
   */
   if (lex->derived_tables)
   {
-    for (TABLE_LIST *cursor= tables;
-	 cursor;
-	 cursor= cursor->next)
-      if (cursor->derived && (res=mysql_derived(thd, lex,
-						(SELECT_LEX_UNIT *)cursor->derived,
-						cursor)))
-      {  
-	if (res < 0)
-	  send_error(thd,thd->killed ? ER_SERVER_SHUTDOWN : 0);
-	DBUG_VOID_RETURN;
-      }
+    for (SELECT_LEX *sl= &lex->select_lex; sl; sl= sl->next_select_in_list())
+      if (sl->linkage != DERIVED_TABLE_TYPE)
+	for (TABLE_LIST *cursor= sl->get_table_list();
+	     cursor;
+	     cursor= cursor->next)
+	  if (cursor->derived && (res=mysql_derived(thd, lex,
+						    (SELECT_LEX_UNIT *)
+						    cursor->derived,
+						    cursor)))
+	  {  
+	    if (res < 0)
+	      send_error(thd,thd->killed ? ER_SERVER_SHUTDOWN : 0);
+	    DBUG_VOID_RETURN;
+	  }
   } 
   if ((lex->select_lex.next_select_in_list() && 
        lex->unit.create_total_list(thd, lex, &tables)) ||

sql/sql_select.cc

@@ -994,7 +994,8 @@ JOIN::exec()
   }
   having=having_list;				// Actually a parameter
   thd->proc_info="Sending data";
-  error=do_select(this, &fields_list, NULL, procedure);
+  error= thd->net.report_error ||
+    do_select(this, &fields_list, NULL, procedure);
   DBUG_VOID_RETURN;
 }
 
@@ -1078,7 +1079,7 @@ mysql_select(THD *thd, TABLE_LIST *tables, List<Item> &fields, COND *conds,
     goto err;
   } 
 
-  if (free_join && join->global_optimize())
+  if (thd->net.report_error || (free_join && join->global_optimize()))
     goto err;
 
   join->exec();