kinolaev opened a new pull request, #15727:
URL: https://github.com/apache/iceberg/pull/15727

   The current implementation of RemoveDanglingDeletesSparkAction keeps 
equality delete files if their lower/upper bounds don't overlap with 
lower/upper bounds of data files with a lower sequence number.
   These delete files are dangling because they are always skipped during 
scans. When they add up, a scan can slow down.
   This PR collects all delete files from a full scan into a set and then 
removes all delete files that aren't in the set. This approach guarantees that 
all dangling delete files are deleted regardless of their type.


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