private boolean left() {
    return dropDeletesToRow.length > 0
      && rowComparator.compareRows(currentRow, dropDeletesToRow, 0, dropDeletesToRow.length) >= 0;
  }
Query matcher for stripe compaction if range drop deletes is used.
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/querymatcher/StripeCompactionScanQueryMatcher.java