lincoln lee created FLINK-28434:
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Summary: Extend "NestedProjectionUtil" to unify support for
projection pushdown for physical fields or metadata only
Key: FLINK-28434
URL: https://issues.apache.org/jira/browse/FLINK-28434
Project: Flink
Issue Type: Improvement
Reporter: lincoln lee
Extend `NestedProjectionUtil` to unify support for projection pushdown for
physical fields or metadata only.
Currently, the `NestedProjectionUtil` relies on rewritten of the input row
type, this not works on the case that a table source only
[SupportsReadingMetadata|https://github.com/apache/flink/pull/20118#] and not
[SupportsProjectionPushDown (which was fixed by
|https://github.com/apache/flink/pull/20118#]
[FLINK-28334|https://github.com/apache/flink/pull/20118#]
[)|https://github.com/apache/flink/pull/20118#]
Some refactor work is needed.
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