public void setBitVector(byte[] bitVector) {
    // workaround for DN bug in persisting nulls in pg bytea column
    // instead set empty bit vector with header.
    // https://issues.apache.org/jira/browse/HIVE-17836
    this.bitVector = (bitVector == null ? new byte[] { 'H', 'L' } : bitVector);
  }
MTableColumnStatistics - Represents Hive's Column Statistics Description. The fields in this
class with the exception of table are persisted in the metastore. In case of table, tbl_id is
persisted in its place.
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/model/MTableColumnStatistics.java