a small fix for a distinct query

af6a7eeb · unknown · 2c121b06 · af6a7eeb
Commit af6a7eeb authored Sep 03, 2002 by unknown
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sql/sql_select.cc sql/sql_select.cc +2 -2

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--- 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 &&