Partition predicates are not pushed down

[smartlxh]

The current logic is that after the partition is trimmed, the partition predicate will be deleted from the predicate. Is this reasonable? There is a problem now. There are two columns A and B. Column A is used as the partition key. The bucket key is (A, B). Now the query uses A=x and B=x. This cannot trim the bucket.

Steps to reproduce the behavior (Required)

CREATE TABLE `Test` (
  `dim_dt` date NOT NULL COMMENT "",
  `dim_class_id` int(11) NOT NULL COMMENT "",
  `dim_week_start_time` bigint(20) NOT NULL COMMENT "",
  `deleted` int(11) NOT NULL COMMENT "
) ENGINE=OLAP
PRIMARY KEY(`dim_dt`, `dim_class_id`, `dim_week_start_time`)
COMMENT ""
PARTITION BY RANGE(`dim_dt`)
(PARTITION p20241204 VALUES [("2024-12-04"), ("2024-12-05")),
PARTITION p20241205 VALUES [("2024-12-05"), ("2024-12-06")),
PARTITION p20241206 VALUES [("2024-12-06"), ("2024-12-07")),
PARTITION p20241207 VALUES [("2024-12-07"), ("2024-12-08")),
PARTITION p20241208 VALUES [("2024-12-08"), ("2024-12-09")),
PARTITION p20241211 VALUES [("2024-12-11"), ("2024-12-12")),
PARTITION p20241212 VALUES [("2024-12-12"), ("2024-12-13")),
PARTITION p20241213 VALUES [("2024-12-13"), ("2024-12-14")),
PARTITION p20241214 VALUES [("2024-12-14"), ("2024-12-15")))
DISTRIBUTED BY HASH(`dim_dt`, `dim_class_id`) BUCKETS 8
PROPERTIES (
"compression" = "LZ4",
"datacache.enable" = "true",
"dynamic_partition.buckets" = "32",
"dynamic_partition.enable" = "true",
"dynamic_partition.end" = "3",
"dynamic_partition.history_partition_num" = "0",
"dynamic_partition.prefix" = "p",
"dynamic_partition.start" = "-7",
"dynamic_partition.time_unit" = "DAY",
"dynamic_partition.time_zone" = "Asia/Shanghai",
"enable_async_write_back" = "false",
"enable_persistent_index" = "false",
"replication_num" = "1",
"storage_volume" = "builtin_storage_volume"
);

insert into sys_full_finish_interview_class_stat_v12 values("2024-12-05",1,1,1);

explain  select dim_class_id from sys_full_finish_interview_class_stat_v12 where dim_dt = '2024-12-05' and dim_class_id in (1);

Expected behavior (Required)

Real behavior (Required)

StarRocks version (Required)

• You can get the StarRocks version by executing SQL select current_version()

this case 2.5 works well. 3.x will't work

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