the following patch fixes a bug in the oracle compatibility

    functions btrim() ltrim() and rtrim().

    The error was that the character after the set  was  included
    in the tests (ptr2 pointed to the character after the vardata
    part of set if no match found,  so  comparing  *ptr  or  *end
    against *ptr2 MAY match -> strip).


Jan

--

#======================================================================#
# It's easier to get forgiveness for being wrong than for being
right. # # Let's break this rule - forgive me.
# #======================================== jwieck@debis.com (Jan
Wieck) #

src/backend/utils/adt/oracle_compat.c

 /*
  *	Edmund Mergl <E.Mergl@bawue.de>
  *
- *	$Id: oracle_compat.c,v 1.14 1998/06/15 19:29:36 momjian Exp $
+ *	$Id: oracle_compat.c,v 1.15 1998/08/11 18:38:07 momjian Exp $
  *
  */
 
@@ -297,7 +297,7 @@ btrim(text *string, text *set)
 				break;
 			++ptr2;
 		}
-		if (*ptr != *ptr2)
+		if (ptr2 > end2)
 			break;
 		ptr++;
 		ptr2 = VARDATA(set);
@@ -316,7 +316,7 @@ btrim(text *string, text *set)
 				break;
 			++ptr2;
 		}
-		if (*end != *ptr2)
+		if (ptr2 > end2)
 			break;
 		--end;
 		ptr2 = VARDATA(set);
@@ -374,7 +374,7 @@ ltrim(text *string, text *set)
 				break;
 			++ptr2;
 		}
-		if (*ptr != *ptr2)
+		if (ptr2 > end2)
 			break;
 		ptr++;
 		ptr2 = VARDATA(set);
@@ -434,7 +434,7 @@ rtrim(text *string, text *set)
 				break;
 			++ptr2;
 		}
-		if (*ptr != *ptr2)
+		if (ptr2 > end2)
 			break;
 		--ptr;
 		ptr2 = VARDATA(set);