sankalpsthakur opened a new pull request, #18160:
URL: https://github.com/apache/iceberg/pull/18160

   Closes #15502
   
   Identity partition projection copied literals from transform predicates (for 
example `hours(ts) = 490674`) onto the identity partition field. Binding that 
predicate to a timestamp partition type throws `ValidationException` during 
scan planning, so queries fail instead of scanning the matching files.
   
   This follows the existing `BoundTransform` handling in `Bucket`, `Truncate`, 
and `TimeTransform`: project only when the bound transform is identity, 
otherwise return null so inclusive projection falls back to `alwaysTrue` and 
strict projection to `alwaysFalse`. Non-reference terms such as `BoundExtract` 
are also skipped.
   
   This revives the approach from #16074 / #17261 (approved, then 
stale-closed), using `ProjectionUtil.projectTransformPredicate`.
   
   I have an ICLA on file with the Apache Software Foundation.
   
   ---
   **AI Disclosure**
   - Model: Cursor Grok 4.6
   - Platform/Tool: Cursor
   - Human Oversight: fully reviewed
   - Prompt Summary: Find one high-priority Apache Iceberg issue, implement a 
small fix on the sankalpsthakur/iceberg fork, and open a PR to apache/iceberg.


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