Remove project from wscg when it's the child of window

[jackylee-ch]

What changes were proposed in this pull request?

We meet the RecordBatch must be non-empty problem when there is a ColumnarWindowExec after WSCG and there is a ColumnarConditionProjectExec as a child of ColumnarWindowExec. It help use when we tried to remove the ColumnarConditionProjectExec from WSCG.

How was this patch tested?

unit tests and manual test.

[github-actions]

Thanks for opening a pull request!

Could you open an issue for this pull request on Github Issues?

https://github.com/oap-project/native-sql-engine/issues

Then could you also rename commit message and pull request title in the following format?

[NSE-${ISSUES_ID}] ${detailed message}

See also:

• Other pull requests

[zhouyuan]

@jackylee-ch thanks for the quick fix!