From af6a7eebe4f0bcd246662e672827c7ad124f1806 Mon Sep 17 00:00:00 2001
From: unknown <Sinisa@sinisa.nasamreza.org>
Date: Tue, 3 Sep 2002 21:31:08 +0300
Subject: [PATCH] a small fix for a distinct query

---
 sql/sql_select.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sql/sql_select.cc b/sql/sql_select.cc
index 11b89722017..6402e29a3ef 100644
--- a/sql/sql_select.cc
+++ b/sql/sql_select.cc
@@ -640,8 +640,8 @@ mysql_select(THD *thd,TABLE_LIST *tables,List<Item> &fields,COND *conds,
     DBUG_PRINT("info",("Creating tmp table"));
     thd->proc_info="Creating tmp table";
 
-    join.tmp_table_param.hidden_field_count=(all_fields.elements-
-					     fields.elements);
+    join.tmp_table_param.hidden_field_count= 
+      (all_fields.elements > fields.elements) ?   (all_fields.elements- fields.elements) : 0;
     if (!(tmp_table =
 	  create_tmp_table(thd,&join.tmp_table_param,all_fields,
 			   ((!simple_group && !procedure &&