HuangXingBo opened a new pull request #14505:
URL: https://github.com/apache/flink/pull/14505
## What is the purpose of the change
*This pull request Fix the bug that it doesn't support field access of
expression containing Python UDF*
## Documentation
- Does this pull request introduce a new feature? (no)
- If yes, how is the feature documented? (not applicable)
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