static String getColumnNamesProperty() {
      return "field";
    }
This class tests the VectorizedOrcAcidRowBatchReader by creating an actual split and a set
of delete delta files. The split is on an insert delta and there are multiple delete deltas
with interleaving list of record ids that get deleted. Correctness is tested by validating
that the correct set of record ids are returned in sorted order for valid transactions only.
ql/src/test/org/apache/hadoop/hive/ql/io/orc/TestVectorizedOrcAcidRowBatchReader.java