Do not complain about 'unknown character set' for skipped QueryEvent

场景：

# 1. start a job
# 2. execute on src mysql
$ mysql ... --default-character-set macce
mysql> create schema not_in_replication_range;

即增量过程中，客户端使用未知字符集，执行非复制范围内的DDL，会引起报错如：

unknown character set macce

[asiroliu]

verify version:
9.9.9.9-master-45af5a4

在常用用例的全量、增量阶段执行如下sql

 CREATE DATABASE db1 CHARACTER SET macce;