In src/include/mb/pg_wchar.h we have:

#define PG_ENCODING_BE_LAST PG_ISO_8859_8
#define PG_ENCODING_FE_LAST PG_WIN1256

but the last client encoding in the enum list is actually PG_GB18030 and
it seems that

#define PG_ENCODING_IS_CLIEN_ONLY(_enc) \
                (((_enc) > PG_ENCODING_BE_LAST && (_enc) <= PG_ENCODING_FE_LAST)

can never be true.

I think the define should read
#define PG_ENCODING_FE_LAST PG_GB18030

On the other hand, perhaps no-one cares, because
PG_ENCODING_IS_CLIEN_ONLY is never used.

--
Oliver Elphick                                Oliver.Elphick@lfix.co.uk

src/include/mb/pg_wchar.h

-/* $Id: pg_wchar.h,v 1.45 2003/02/19 14:31:26 ishii Exp $ */
+/* $Id: pg_wchar.h,v 1.46 2003/06/02 18:59:25 momjian Exp $ */
 
 #ifndef PG_WCHAR_H
 #define PG_WCHAR_H
@@ -190,7 +190,7 @@ typedef enum pg_enc
 } pg_enc;
 
 #define PG_ENCODING_BE_LAST PG_ISO_8859_8
-#define PG_ENCODING_FE_LAST PG_WIN1256
+#define PG_ENCODING_FE_LAST PG_GB18030
 
 /*
  * Please use these tests before access to pg_encconv_tbl[]