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由 Andrew Kryczka 提交于
Summary: Note: reviewed in https://reviews.facebook.net/D65115 - DBIter maintains a range tombstone accumulator. We don't cleanup obsolete tombstones yet, so if the user seeks back and forth, the same tombstones would be added to the accumulator multiple times. - DBImpl::NewInternalIterator() (used to make DBIter's underlying iterator) adds memtable/L0 range tombstones, L1+ range tombstones are added on-demand during NewSecondaryIterator() (see D62205) - DBIter uses ShouldDelete() when advancing to check whether keys are covered by range tombstones Closes https://github.com/facebook/rocksdb/pull/1464 Differential Revision: D4131753 Pulled By: ajkr fbshipit-source-id: be86559
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