public List<KuduPredicate> convert(ScalarOperator operator) {
        if (operator == null) {
            return null;
        }
        return operator.accept(this, null);
    }
@Test
    public void testOr() {
        ConstantOperator intOp = ConstantOperator.createInt(5);
        ConstantOperator varcharOp = ConstantOperator.createVarchar("abc");
        ScalarOperator gt = new BinaryPredicateOperator(BinaryType.GT, F0, intOp);
        ScalarOperator eq = new BinaryPredicateOperator(BinaryType.EQ, F1, varcharOp);
        ScalarOperator op = new CompoundPredicateOperator(CompoundPredicateOperator.CompoundType.OR, gt, eq);
        List<KuduPredicate> result = CONVERTER.convert(op);
        Assert.assertEquals(result.size(), 0);
    }