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93cc4454a6
Originally, streamed_mutations guaranteed that emitted tombstones are disjoint. In order to achieve that two separate objects were produced for each range tombstone: range_tombstone_begin and range_tombstone_end. Unfortunately, this forced sstable writer to accumulate all clustering rows between range_tombstone_begin and range_tombstone_end. However, since there is no need to write disjoint tombstones to sstables (see #1153 "Write range tombstones to sstables like Cassandra does") it is also not necessary for streamed_mutations to produce disjoint range tombstones. This patch changes that by making streamed_mutation produce range_tombstone objects directly. Signed-off-by: Paweł Dziepak <pdziepak@scylladb.com>