[Bug] Query throw unexpected exception: null

[morningman]

Describe the bug
Query return error: Unexpected exception: null

To Reproduce

CREATE TABLE test.`pushdown_test` (
  `k1` tinyint(4) NULL COMMENT "",
  `k2` smallint(6) NULL COMMENT "",
  `k3` int(11) NULL COMMENT "",
  `k4` bigint(20) NULL COMMENT "",
  `k5` decimal(9, 3) NULL COMMENT "",
  `k6` char(5) NULL COMMENT "",
  `k10` date NULL COMMENT "",
  `k11` datetime NULL COMMENT "",
  `k7` varchar(20) NULL COMMENT "",
  `k8` double MAX NULL COMMENT "",
  `k9` float SUM NULL COMMENT ""
) ENGINE=OLAP
AGGREGATE KEY(`k1`, `k2`, `k3`, `k4`, `k5`, `k6`, `k10`, `k11`, `k7`)
COMMENT "OLAP"
PARTITION BY RANGE(`k1`)
(PARTITION p1 VALUES [("-128"), ("-64")),
PARTITION p2 VALUES [("-64"), ("0")),
PARTITION p3 VALUES [("0"), ("64")))
DISTRIBUTED BY HASH(`k1`) BUCKETS 5
PROPERTIES (
"replication_num" = "1",
"in_memory" = "false",
"storage_format" = "DEFAULT"
);

SELECT *
FROM test.test2
WHERE 0 < (
    SELECT MAX(k9)
    FROM test.test2);

Expected behavior
Execute normally.

This bug is introduced by PR: #3453