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Posted to github@datafusion.apache.org by "stuhood (via GitHub)" <gi...@apache.org> on 2026/09/17 21:24:26 UTC

Re: [I] Optimized version of `SortPreservingMerge` that doesn't actually compare sort keys of the key ranges are ordered [datafusion]

stuhood commented on issue #10316:
URL: https://github.com/apache/datafusion/issues/10316#issuecomment-5721439575

   With `Partitioning::Range` landed, the physical plan can guarantee that partition streams are non-overlapping and ordered. In addition to (?) inspecting runtime file statistics, `SortPreservingMergeExec` could check for matching `Partitioning::Range` to stream partitions sequentially and early-exit on `LIMIT`.
   
   See #25437 (part of #25421).


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