Method iterate

posting/list.go:287–300

Before iterating, we have to figure out where the last delete marker is Then gather the posts that would be above the marker

(f func(ts uint64, pl *pb.PostingList), readTs uint64)

// Before iterating, we have to figure out where the last delete marker is
// Then gather the posts that would be above the marker
func (mm *MutableLayer) iterate(f func(ts uint64, pl *pb.PostingList), readTs uint64) uint64 {
	if mm == nil {
		return 0
	}

	deleteAllMarker := mm.populateDeleteAll(readTs)
	mm.iterateCommittedEntries(func(ts uint64, pl *pb.PostingList) {
		// Note this might not be required, but just here for safety
		if ts >= deleteAllMarker && ts <= readTs {
			f(ts, pl)
		}
	})
	return deleteAllMarker
}

// insertCommittedPostings inserts an old committed posting in the mutable layer. It also updates fields that are
// cached. This includes deleteAllMarker, length and committedUids map. this should be called while