From e28af60ab68e9a0398fea2e9beaab5abb8ab13af Mon Sep 17 00:00:00 2001
From: unknown <hf@deer.(none)>
Date: Fri, 12 Dec 2003 22:13:57 +0400
Subject: [PATCH] Fix #2093 Update after discussion with Monty

sql/sql_select.cc:
  Wrong operation - deleted
---
 sql/sql_select.cc | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/sql/sql_select.cc b/sql/sql_select.cc
index d0d6c1e5fa2..8f2d97affca 100644
--- a/sql/sql_select.cc
+++ b/sql/sql_select.cc
@@ -1803,14 +1803,7 @@ update_ref_and_keys(THD *thd, DYNAMIC_ARRAY *keyuse,JOIN_TAB *join_tab,
     }
     /* fill keyuse with found key parts */
     for (; field != end ; field++)
-    {
       add_key_part(keyuse,field);
-      /* Mark that we can optimize LEFT JOIN */
-      if (field->field->table == join_tab->table &&
-	  field->val->type() == Item::NULL_ITEM &&
-	  !field->field->real_maybe_null())
-	join_tab->table->reginfo.not_exists_optimize=1;
-    }
   }
 
   if (thd->lex.select->ftfunc_list.elements)