``` insert into t1 (k1, k2, v1) value(1, '', 2); delete form t1 where k1 = 1 and k2 = ''; alter table modify column v1 string select * from t1 // expect 0 rows in return, but get 1 row. ```
``` insert into t1 (k1, k2, v1) value(1, '', 2); delete form t1 where k1 = 1 and k2 = ''; alter table modify column v1 string select * from t1 // expect 0 rows in return, but get 1 row. ```