peter-toth edited a comment on issue #23802: [SPARK-26893][SQL] Allow partition pruning with subquery filters on file source URL: https://github.com/apache/spark/pull/23802#issuecomment-465520513 > does it really help with performance? The `HiveShim#convertFilters` doesn't support subquery filter either, so partition pruning can't get the benefit of it. ~~Hmm, I don't see in `HiveTableScans` strategy that it filters out subquery expressions from partition pruning filters (`pruningPredicates`) before passing it to `HiveTableScanExec` and then to `HiveShim#convertFilters`. Nor I see that it includes these filters in `FilterExec` around `HiveTableScanExec`. Seems like a bug to me.~~ Never mind. I get it now.
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