Bug #2699 UTF8 breaks primary keys for cols > 85 characters

mysql-test/r/ctype_utf8.result

@@ -167,3 +167,5 @@ select hex(s1) from t1;
 hex(s1)
 41
 drop table t1;
+create table t1 (a char(160) character set utf8, primary key(a));
+ERROR HY000: Incorrect sub part key. The used key part isn't a string, the used length is longer than the key part or the storage engine doesn't support unique sub keys

mysql-test/t/ctype_utf8.test

@@ -98,3 +98,10 @@ create table t1 (s1 text character set utf8);
 insert into t1 values (0x41FF);
 select hex(s1) from t1;
 drop table t1;
+
+#
+# Bug 2699
+# UTF8 breaks primary keys for cols > 85 characters
+#
+--error 1089
+create table t1 (a char(160) character set utf8, primary key(a));

sql/sql_table.cc

@@ -877,7 +877,12 @@ int mysql_create_table(THD *thd,const char *db, const char *table_name,
 			column->field_name);
 	  DBUG_RETURN(-1);
       }
-      key_part_info->length=(uint8) length;
+      if (length > file->max_key_part_length())
+      {
+	my_error(ER_WRONG_SUB_KEY,MYF(0));
+	DBUG_RETURN(-1);
+      }
+      key_part_info->length=(uint16) length;
       /* Use packed keys for long strings on the first column */
       if (!(db_options & HA_OPTION_NO_PACK_KEYS) &&
 	  (length >= KEY_DEFAULT_PACK_LENGTH &&