voonhous commented on PR #19456:
URL: https://github.com/apache/hudi/pull/19456#issuecomment-5158380218

   Re-reviewed at `40261aca65ce`. All 11 points addressed; I checked each 
against the code rather than the replies.
   
   The three new tests are not decorative -- I reintroduced the exact 
regression each claims to catch:
   
   - dedup key narrowed back to base-index-only -> **only** 
`testRemapPredicateKeepsBothProjectionsOfOneBaseColumn` fails (the `c0#f` 
domain is silently dropped). 
`testRemapPredicateKeepsOneDomainPerPhysicalColumn` stays green, so the two pin 
distinct properties rather than overlapping.
   - predicate remap disabled -> 
`testPredicateOnColumnWithStaleMetastoreOrdinal` fails `0 rows` vs `5 
expected`, i.e. the real #19387 symptom, now caught end-to-end through a 
`QueryRunner`.
   - merge-path `enablePredicatePushDown` flipped to `true` at 
`HudiPageSourceProvider:254` -> 
`testPredicateIsNotPushedIntoTheBaseReadOfAMergedSplit` fails.
   
   All green at head (19 unit + the two e2e), `test-hudi-trino-plugin` passing. 
Nothing outstanding from me.
   


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