db: fix newly-introduced SINGLEDEL+DELSIZED bug #3088
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In bfb2e6a (cockroachdb#3081) a small refactor the handling of DELSIZED introduced a bug when a DELSIZED shadows a SINGLEDEL. When a DELSIZED and a SINGLEDEL meet in a compaction, we began accidentally emitting a SINGLEDEL rather than a DEL, weakening the tombstone. Previously the problematic code branch was only ever executed when a DELSIZED and DEL met, so iterKey.Kind() was always DEL. Fix cockroachdb#3087.
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itsbilal
approved these changes
Nov 18, 2023
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tftr! |
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In bfb2e6a (#3081) a small refactor the handling of DELSIZED introduced a bug when a DELSIZED shadows a SINGLEDEL. When a DELSIZED and a SINGLEDEL meet in a compaction, we began accidentally emitting a SINGLEDEL rather than a DEL, weakening the tombstone. Previously the problematic code branch was only ever executed when a DELSIZED and DEL met, so iterKey.Kind() was always DEL.
Fix #3087.