I really hope that I haven't missed anything in this one...

From: t-ishii@sra.co.jp

Attached are patches to enhance the multi-byte support.  (patches are
against 7/18 snapshot)

* determine encoding at initdb/createdb rather than compile time

Now initdb/createdb has an option to specify the encoding. Also, I
modified the syntax of CREATE DATABASE to accept encoding option. See
README.mb for more details.

For this purpose I have added new column "encoding" to pg_database.
Also pg_attribute and pg_class are changed to catch up the
modification to pg_database.  Actually I haved added pg_database_mb.h,
pg_attribute_mb.h and pg_class_mb.h. These are used only when MB is
enabled. The reason having separate files is I couldn't find a way to
use ifdef or whatever in those files. I have to admit it looks
ugly. No way.

* support for PGCLIENTENCODING when issuing COPY command

commands/copy.c modified.

* support for SQL92 syntax "SET NAMES"

See gram.y.

* support for LATIN2-5
* add UNICODE regression test case
* new test suite for MB

New directory test/mb added.

* clean up source files

Basic idea is to have MB's own subdirectory for easier maintenance.
These are include/mb and backend/utils/mb.

src/backend/utils/adt/like.c

@@ -21,7 +21,7 @@
 #include "postgres.h"			/* postgres system include file */
 #include "utils/palloc.h"
 #include "utils/builtins.h"		/* where the function declarations go */
-#include "regex/pg_wchar.h"
+#include "mb/pg_wchar.h"
 
 static int	like(pg_wchar *text, pg_wchar *p);
 
@@ -111,7 +111,7 @@ textnlike(struct varlena * s, struct varlena * p)
 }
 
 
-/*	$Revision: 1.17 $
+/*	$Revision: 1.18 $
 **	"like.c" A first attempt at a LIKE operator for Postgres95.
 **
 **	Originally written by Rich $alz, mirror!rs, Wed Nov 26 19:03:17 EST 1986.