last_insert_id() 表达式无法预计算导致主键查询走了全表扫描

OceanBase(root@test)>create table t1(c1 int primary key, c2 int);
Query OK, 0 rows affected (0.41 sec)

--预期计划应该是一个TABLE GET
OceanBase(root@test)>explain select * from t1 where c1 = last_insert_id();
+------------------------------------------------------------------------------------+
| Query Plan                                                                         |
+------------------------------------------------------------------------------------+
| ==========================================                                         |
| |ID|OPERATOR  |NAME|EST.ROWS|EST.TIME(us)|                                         |
| ------------------------------------------                                         |
| |0 |TABLE SCAN|t1  |1       |2           |                                         |
| ==========================================                                         |
| Outputs & filters:                                                                 |
| -------------------------------------                                              |
|   0 - output([t1.c1], [t1.c2]), filter([t1.c1 = last_insert_id()]), rowset=256     |
|       access([t1.c1], [t1.c2]), partitions(p0)                                     |
|       is_index_back=false, is_global_index=false, filter_before_indexback[false],  |
|       range_key([t1.c1]), range(MIN ; MAX)always true                              |
+------------------------------------------------------------------------------------+

-- 利用用户变量将一条 SQL 拆成二条直行
select * from t1 where pk = last_insert_id();
=>
set @insert_id_var = last_insert_id();
select * from t1 where pk = @insert_id_var;