How to use

findMinLocalDeletionTime

method

in

org.apache.cassandra.db.Memtable

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);
}

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);
}

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);
}