linghengqian commented on issue #30815:
URL: 
https://github.com/apache/shardingsphere/issues/30815#issuecomment-2044612289

   - I must admit I kind of don't understand what you're doing. So I made some 
assumptions at 
https://github.com/linghengqian/demo-sharding/commit/98181ab258317d74cbe11cb67a82317bcfff0137
 to fix the unit tests.
   1. Your `rules[1].tables.analytics_event.actualDataNodes` is not a legal 
GroovyShell expression, it looks like there is an extra `}`. Refer to 
https://shardingsphere.apache.org/document/current/en/user-manual/common-config/builtin-algorithm/expr/
 .
   2. Your 
`rules[1].shardingAlgorithms.analytics_event_inline.props.algorithm-expression` 
seems to expect to continue to configure the `Sharding` table on the `logical 
database` configured with `Read/write splitting`, but the context of 
`algorithm-expression` actually only knows `actual table` name, it doesn't know 
the `logical or actual database` name. You can try debugging into the algorithm 
class.


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