JamesRTaylor opened a new issue, #31658:
URL: https://github.com/apache/shardingsphere/issues/31658
## Bug Report
### Which version of ShardingSphere did you use?
5.5.1-SNAPSHOT
### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy?
Testing through unit tests
### Expected behavior
The join condition should help determine how the logical query is rewritten.
### Actual behavior
Only the name of the column referenced seems to have an impact on how the
logical query is rewritten. The join condition doesn't impact it at all. For
example, if an inequality join condition is used, the join would need to be run
across all shards, while with an equality join, you'd be able to run it against
a single shard.
### Reason analyze (If you can)
### Steps to reproduce the behavior, such as: SQL to execute, sharding rule
configuration, when exception occur etc.
Add the following to select.xml and run ShardingSQLRewriterIT:
<rewrite-assertion id="select_with_inequality_join">
<input sql="SELECT * FROM t_account o, t_account_detail i WHERE
o.account_id>i.account_id AND o.account_id = ?" parameters="100" />
<output sql="SELECT * FROM t_account_0 o, t_account_detail_0 i WHERE
o.account_id > i.account_id AND o.account_id = ?" parameters="100" />
<output sql="SELECT * FROM t_account_0 o, t_account_detail_1 i WHERE
o.account_id>i.account_id AND o.account_id = ?" parameters="100" />
</rewrite-assertion>
ShardingSphere only produces the first output query, which is correct if the
join condition is an equality join, but not if it's an inequality join. Note
that if there's no correlation between the two tables being joined,
ShardingSphere produces the expected output queries. For example, this is
correct:
<rewrite-assertion id="select_with_unconstrained_user">
<input sql="SELECT * FROM t_account o, t_user u WHERE
o.account_id=u.id AND o.account_id = ?" parameters="100" />
<output sql="SELECT * FROM t_account_0 o, t_user_0 u WHERE
o.account_id=u.id AND o.account_id = ?" parameters="100" />
<output sql="SELECT * FROM t_account_0 o, t_user_1 u WHERE
o.account_id=u.id AND o.account_id = ?" parameters="100" />
</rewrite-assertion>
### Example codes for reproduce this issue (such as a github link).
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