ctype_sjis.result, ctype_sjis.test, ctype-sjis.c:

  Bug #6223 Japanese half-width kana characters get truncated. Bytes 0xA1..0xDF were not treated as a single byte sequence in a mistake.

mysql-test/r/ctype_sjis.result

@@ -60,3 +60,14 @@ hex(c)
 9353
 9373
 drop table t1;
+SET NAMES sjis;
+CREATE TABLE t1 (
+c char(16) default NULL
+) ENGINE=MyISAM DEFAULT CHARSET=sjis;
+insert into t1 values(0xb1),(0xb2),(0xb3);
+select hex(c) from t1;
+hex(c)
+B1
+B2
+B3
+drop table t1;

mysql-test/t/ctype_sjis.test

@@ -51,3 +51,14 @@ insert into t1 values (0x9353);
 insert into t1 values (0x9373);
 select hex(c) from t1;
 drop table t1;
+
+#
+# Bug #6223 Japanese half-width kana characters get truncated
+#
+SET NAMES sjis;
+CREATE TABLE t1 (
+ c char(16) default NULL
+) ENGINE=MyISAM DEFAULT CHARSET=sjis;
+insert into t1 values(0xb1),(0xb2),(0xb3);
+select hex(c) from t1;
+drop table t1;

strings/ctype-sjis.c

@@ -4581,14 +4581,19 @@ uint my_well_formed_len_sjis(CHARSET_INFO *cs __attribute__((unused)),
     */
     if (((int8)b[0]) >= 0)
     {
-      /* Single byte character */
-      b+= 1;
+      /* Single byte ascii character */
+      b++;
     }
     else  if (issjishead((uchar)*b) && (e-b)>1 && issjistail((uchar)b[1]))
     {
       /* Double byte character */
       b+= 2;
     }
+    else if (((uchar)*b) >= 0xA1 && ((uchar)*b) <= 0xDF)
+    {
+      /* Half width kana */
+      b++;
+    }
     else
     {
       /* Wrong byte sequence */