fixed subselect * bug

mysql-test/r/subselect.result

@@ -159,6 +159,12 @@ UNIQUE KEY `email` (`email`)
 INSERT INTO inscrit (pseudo,email) VALUES ('joce','test');
 INSERT INTO inscrit (pseudo,email) VALUES ('joce1','test1');
 INSERT INTO inscrit (pseudo,email) VALUES ('2joce1','2test1');
+SELECT pseudo FROM inscrit WHERE pseudo=(SELECT pseudo,email FROM
+inscrit WHERE pseudo='joce');
+Subselect returns more than 1 field
+SELECT pseudo FROM inscrit WHERE pseudo=(SELECT * FROM inscrit WHERE
+pseudo='joce');
+Subselect returns more than 1 field
 SELECT pseudo FROM inscrit WHERE pseudo=(SELECT pseudo FROM inscrit WHERE pseudo='joce');
 pseudo
 joce

mysql-test/t/subselect.test

@@ -82,6 +82,12 @@ CREATE TABLE `inscrit` (
 INSERT INTO inscrit (pseudo,email) VALUES ('joce','test');
 INSERT INTO inscrit (pseudo,email) VALUES ('joce1','test1');
 INSERT INTO inscrit (pseudo,email) VALUES ('2joce1','2test1');
+-- error 1239
+SELECT pseudo FROM inscrit WHERE pseudo=(SELECT pseudo,email FROM
+inscrit WHERE pseudo='joce');
+-- error 1239
+SELECT pseudo FROM inscrit WHERE pseudo=(SELECT * FROM inscrit WHERE
+pseudo='joce');
 SELECT pseudo FROM inscrit WHERE pseudo=(SELECT pseudo FROM inscrit WHERE pseudo='joce');
 -- error 1240
 SELECT pseudo FROM inscrit WHERE pseudo=(SELECT pseudo FROM inscrit WHERE pseudo LIKE '%joce%');

sql/item_subselect.cc

@@ -81,15 +81,17 @@ void Item_subselect::make_field (Send_field *tmp_field)
 
 bool Item_subselect::fix_fields(THD *thd, TABLE_LIST *tables, Item **ref)
 {
-  // Is it one field subselect?
-  if (engine->cols() > max_columns)
-  {  
-    my_message(ER_SUBSELECT_NO_1_COL, ER(ER_SUBSELECT_NO_1_COL), MYF(0));
-    return 1;
-  }
   int res= engine->prepare();
   if (!res)
+  {
+    // Is it one field subselect?
+    if (engine->cols() > max_columns)
+    {  
+      my_message(ER_SUBSELECT_NO_1_COL, ER(ER_SUBSELECT_NO_1_COL), MYF(0));
+      return 1;
+    }
     fix_length_and_dec();
+  }
   return res;
 }