case when process null input in predicate cause a wrong result

[stdpain]

Steps to reproduce the behavior (Required)

CREATE TABLE `reproduce_null2` (
  `v1` varchar(255) NULL COMMENT "",
  `v2` varchar(255) NULL COMMENT ""
) ENGINE=OLAP 
UNIQUE KEY(`v1`)
COMMENT "OLAP"
DISTRIBUTED BY HASH(`v1`) BUCKETS 10 
PROPERTIES (
"replication_num" = "1",
"in_memory" = "false",
"storage_format" = "DEFAULT",
"enable_persistent_index" = "false"
);

 insert into reproduce_null2 values (null, null); 
 analyze full table reproduce_null2;
 -- make sure execute multi times
 select count(*) from reproduce_null2 where case when v2 is null then true else false end;

Expected behavior (Required)

mysql> select count(*) from reproduce_null2 where case when v2 is null then true else false end;
+----------+
| count(*) |
+----------+
|        1 |
+----------+
1 row in set (0.02 sec)

Real behavior (Required)

mysql> select count(*) from reproduce_null2 where case when v2 is null then true else false end;
+----------+
| count(*) |
+----------+
|        0 |
+----------+
1 row in set (0.02 sec)

StarRocks version (Required)

• 2.3.0-rc02

[stdpain]

known failed 2.2.4