dbzzzzz opened a new issue #10566:
URL: https://github.com/apache/shardingsphere/issues/10566
### Which version of ShardingSphere did you use?
ShardingSphere 5
### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy?
ShardingSphere-Proxy
### Expected behavior
select * from t_order
union all
select * from t_order;
should return correct result.
### Actual behavior
mysql> select * from t_order
-> union all
-> select * from t_order;
ERROR 1999 (C1999): Unknown exception: [union select is not supported yet.]
mysql> select * from t_order union select * from t_order;
ERROR 1999 (C1999): Unknown exception: [union select is not supported yet.]
### Reason analyze (If you can)
### Steps to reproduce the behavior, such as: SQL to execute, sharding rule
configuration, when exception occur etc.
### Example codes for reproduce this issue (such as a github link).
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