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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);
CREATE SEQUENCE new_student_id START 349009;
alter table student add column new_student_id int DEFAULT nextval('new_student_id') NOT NULL;
6 rows affected
select * from student;
| student_id | new_student_id |
|---|---|
| 100001 | 349009 |
| 100002 | 349010 |
| 100003 | 349011 |
| 100004 | 349012 |
| 100005 | 349013 |
| 100006 | 349014 |