From de212f4910dd9b75641a572b68a3fec5509974e3 Mon Sep 17 00:00:00 2001
From: Tatsuo Ishii <ishii@postgresql.org>
Date: Tue, 24 May 2005 23:15:05 +0000
Subject: [PATCH] Inserting 5 characters into char(10) does not produce 5
 padding spaces if they are two-byte multibyte characters. Same thing can be
 happen if octet_length(multibyte_chars) == n where n is char(n). Long
 standing bug since 7.3 days. Per report and fix from Yoshiyuki Asaba.

---
 src/backend/parser/parse_expr.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/backend/parser/parse_expr.c b/src/backend/parser/parse_expr.c
index b40e8953276..ce9ec2177c0 100644
--- a/src/backend/parser/parse_expr.c
+++ b/src/backend/parser/parse_expr.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/parser/parse_expr.c,v 1.163.2.1 2004/04/18 18:13:31 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/parser/parse_expr.c,v 1.163.2.2 2005/05/24 23:15:05 ishii Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -18,6 +18,7 @@
 #include "catalog/pg_operator.h"
 #include "catalog/pg_proc.h"
 #include "commands/dbcommands.h"
+#include "mb/pg_wchar.h"
 #include "miscadmin.h"
 #include "nodes/makefuncs.h"
 #include "nodes/params.h"
@@ -1356,7 +1357,13 @@ exprTypmod(Node *expr)
 				{
 					case BPCHAROID:
 						if (!con->constisnull)
-							return VARSIZE(DatumGetPointer(con->constvalue));
+						{
+							int32 len = VARSIZE(DatumGetPointer(con->constvalue));
+
+							if (pg_database_encoding_max_length() > 1)
+								len = pg_mbstrlen_with_len(VARDATA(DatumGetPointer(con->constvalue)), len);
+							return len;
+						}
 						break;
 					default:
 						break;