public boolean canJdoUseStringsWithIntegral() {
      return (operator == Operator.EQUALS)
          || (operator == Operator.NOTEQUALS)
          || (operator == Operator.NOTEQUALS2);
    }
@return true iff filter pushdown for this operator can be done for integral types.
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/parser/ExpressionTree.java