HBASE-28055 Performance improvement for scan over several stores. (#5379)

Signed-off-by: Ankit Singhal <[email protected]>
Signed-off-by: Tak Lon (Stephen) Wu <[email protected]>

Author: ss77892

hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreScanner.java

@@ -934,7 +934,9 @@ protected boolean trySkipToNextColumn(Cell cell) throws IOException {
     // We need this check because it may happen that the new scanner that we get
     // during heap.next() is requiring reseek due of fake KV previously generated for
     // ROWCOL bloom filter optimization. See HBASE-19863 for more details
-    if (useRowColBloom && nextCell != null && matcher.compareKeyForNextColumn(nextCell, cell) < 0) {
+    if (
+      useRowColBloom && nextCell != null && cell.getTimestamp() == PrivateConstants.OLDEST_TIMESTAMP
+    ) {
       return false;
     }
     return true;