@Override protected void finalize() throws Throwable {
    try {
      closeTable();
    } finally {
      super.finalize();
    }
  }
Instantiates a new predicate analyzer suitable for
determining how to push a filter down into the HBase scan,
based on the rules for what kinds of pushdown we currently support.

@param keyColumnName name of the Hive column mapped to the HBase row key

@return preconfigured predicate analyzer
hbase-handler/src/java/org/apache/hadoop/hive/hbase/HiveHBaseTableInputFormat.java