xiedeyantu commented on PR #4209:
URL: https://github.com/apache/calcite/pull/4209#issuecomment-2687379085
> The issue raised by @suibianwanwank is a very good test case. We should
test the accuracy of this logic in the JdbcTest.
@NobiGo Sorry, I tried many ways and couldn't find a good jdbc test method.
I found that when executing the test, the plan should not include subquery,
which will cause this error
```
public RexLocalRef registerInput(RexNode expr) {
final RexShuttle shuttle = new RegisterInputShuttle(true);
final RexNode ref = expr.accept(shuttle);
return (RexLocalRef) ref; <------ ref is Subquery, can not cast to
RexLocalRef
}
```
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