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Help with an interesting Postgres question: Why isn't an Index Only Scan used on a partition accessed via the parent table?.
CREATE TABLE student
(
STUDENT_ID serial primary key
);
insert into student values
(100001),
(100002),
(100003),
(100004),
(100005),
(100006);
6 rows affected
select * from student;
| student_id |
|---|
| 100001 |
| 100002 |
| 100003 |
| 100004 |
| 100005 |
| 100006 |
alter table student add column NEW_STUDENT_ID serial;
select * from student;
| student_id | new_student_id |
|---|---|
| 100001 | 1 |
| 100002 | 2 |
| 100003 | 3 |
| 100004 | 4 |
| 100005 | 5 |
| 100006 | 6 |