@Deprecated
  static Path[] getDeleteDeltaDirsFromSplit(OrcSplit orcSplit) {
    return getDeleteDeltaDirsFromSplit(orcSplit, null);
  }
Does this reader need to decorate rows with ROW__IDs (for "original" reads).
Even if ROW__ID is not projected you still need to decorate the rows with them to see if
any of the delete events apply.
ql/src/java/org/apache/hadoop/hive/ql/io/orc/VectorizedOrcAcidRowBatchReader.java