public MemtableUnfilteredPartitionIterator makePartitionIterator(
final ColumnFilter columnFilter, final DataRange dataRange, final boolean isForThrift) {
AbstractBounds<PartitionPosition> keyRange = dataRange.keyRange();
boolean startIsMin = keyRange.left.isMinimum();
boolean stopIsMin = keyRange.right.isMinimum();
boolean isBound = keyRange instanceof Bounds;
boolean includeStart = isBound || keyRange instanceof IncludingExcludingBounds;
boolean includeStop = isBound || keyRange instanceof Range;
Map<PartitionPosition, AtomicBTreePartition> subMap;
if (startIsMin)
subMap = stopIsMin ? partitions : partitions.headMap(keyRange.right, includeStop);
else
subMap =
stopIsMin
? partitions.tailMap(keyRange.left, includeStart)
: partitions.subMap(keyRange.left, includeStart, keyRange.right, includeStop);
int minLocalDeletionTime = Integer.MAX_VALUE;
// avoid iterating over the memtable if we purge all tombstones
if (cfs.getCompactionStrategyManager().onlyPurgeRepairedTombstones())
minLocalDeletionTime = findMinLocalDeletionTime(subMap.entrySet().iterator());
final Iterator<Map.Entry<PartitionPosition, AtomicBTreePartition>> iter =
subMap.entrySet().iterator();
return new MemtableUnfilteredPartitionIterator(
cfs, iter, isForThrift, minLocalDeletionTime, columnFilter, dataRange);
}
