boolean mayContainSideFile() {
      return !isDeleteDelta() && getMinWriteId() != getMaxWriteId() && getVisibilityTxnId() <= 0;
    }
Only un-compacted delta_x_y (x != y) (created by streaming ingest with batch size > 1)
may contain a {@link OrcAcidUtils#getSideFile(Path)}.
@return
ql/src/java/org/apache/hadoop/hive/ql/io/AcidUtils.java