Hello,
With PostgreSQL 8.3.0 the following bug has been introduced with the ILIKE =
or=20
~~* operator:
In a database with single-byte encoding as LATIN1 the expression
SELECT 'a=FC' ILIKE '%=FC';
returns false.
This error is true for every pattern, where a % is followed by a char with =
a=20
decimal value between 128 and 255.=20
I was able to track down the error to the file=20
src/backend/utils/adt/like_match.c=20
For the single-byte case there are some places where a (signed) char value =
is=20
compared to the return value auf tolower() which is an int. The '=FC' in La=
tin1=20
is -4 as signed char and 252 as int as returned by tolower() which is=20
obviously not equal.
It could be fixed, with the appended patch.
cu
Rolf Jentsch
Entwicklung Mitglieder-Systeme Dezentral
ElectronicPartner GmbH
M=FCndelheimer Weg 40
40472 D=FCsseldorf
phone: +49-(0)211-4156-0
fax: +49-(0)211-4156-6865
eMail: rjentsch@electronicpartner.de
Sitz der Gesellschaft D=FCsseldorf
Amtsgericht - Registergericht D=FCsseldorf - HRB 4078
Gesch=E4ftsf=FChrer: Oliver Haubrich,=20
Dr. Sven-Olaf Krau=DF, Karl Trautman
--- src/backend/utils/adt/like_match.c 2008-02-28 18:19:30.000000000=
=20
+0100
+++ src/backend/utils/adt/like_match.c 2008-02-28 18:19:43.000000000=
=20
+0100
@@ -71,7 +71,7 @@
*/
#ifdef MATCH_LOWER
-#define TCHAR(t) tolower((t))
+#define TCHAR(t) ((char)tolower((t)))
#else
#define TCHAR(t) (t)
#endif
