MySQL Workbench8.0 does not show the global table 'test'

[wjl1619]

• dble version：
  5.6.29-dble-9.9.9.9-f97fea2-20181119022134
• preconditions ：
• configs：

schema.xml

 <schema dataNode="dn5" name="mytest" sqlMaxLimit="100">
                <table dataNode="dn1,dn2,dn3,dn4" name="test" type="global" />
        </schema>

        <dataNode dataHost="172.100.9.5" database="db1" name="dn1" />
        <dataNode dataHost="172.100.9.6" database="db1" name="dn2" />
        <dataNode dataHost="172.100.9.5" database="db2" name="dn3" />
        <dataNode dataHost="172.100.9.6" database="db2" name="dn4" />
        <dataNode dataHost="172.100.9.5" database="db3" name="dn5" />

rule.xml

server.xml

• steps：
  step1. exec sql:

 SHOW FULL TABLES FROM `mytest`;

step2. exec sql: 

SHOW FULL TABLES FROM mytest;

• expect result：

  1. show the same table list

• real result：
  1.
  

• supplements：
  1.

/label ~BUG

[wjl1619]

verified on version: 5.6.29-dble-9.9.9.9-fa53a6f-20181212091929