Compound SQL statement returned package error

[gaopengpeng123456]

• dble version：
  5.6.29-dble-9.9.9.9-39f7dce0882288cad7fdc38ce4b509be58f27006-20200107103915
• preconditions ：
  no
• configs：

schema.xml

<schema name="testdb">
        <table name="tb_enum_sharding" primaryKey="ID" dataNode="dn1"/>            
 </schema>

 <dataNode name="dn1" dataHost="dataHost1" database="db_1"/>

<dataHost name="dataHost1" maxCon="1000" minCon="10" balance="0" switchType="-1" slaveThreshold="100">
        <heartbeat>show slave status</heartbeat>
        <writeHost host="hostM1" url="localhost:3306" user="root" password="123456">           
        </writeHost>
    </dataHost>

rule.xml

server.xml

• steps：
  mysql> delimiter //
  mysql> SET autocommit=1;show databases//

• expect result：
  Query OK, 0 rows affected (0.00 sec)

  +----------+
  | DATABASE |
  +----------+
  | testdb |
  +----------+
  1 row in set (0.00 sec)

• real result：

  Query OK, 0 rows affected (0.00 sec)

• supplements：
  1.[Discuss]关于DBLE的嵌套使用场景 #1583

[irene-coming]

verified on dble: 5.6.29-dble-9.9.9.9-96c130230a2ef9268bdb3605e190d559b0439625-20200203081515