Software Environment:
OpenLooKeng version (source or binary): NA

OS platform & distribution (eg., Linux Ubuntu 16.04): NA

Java version:

Describe the current behavior
when parsing key-word in SQLstatement, it is not enough strictness in "public static int parse(String stmt)" in \src\main\java\io\mycat\server\parser\ServerParse.java, words such as "test-insert" will be mistaken as keyword "insert" in a SQLstatement.

Describe the expected behavior
key-word in SQL statement parsed correctly.

Steps to reproduce the issue

1. call io.mycat.server.parser.ServerParse#parse with "not-insert from select 1", check the return value will be ServerParse.INSERT, it is not correct

Related log/screenshots
NA

Special notes for this issue
NA