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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
INSERT 0 1
INSERT 0 1
INSERT 0 1
INSERT 0 1
INSERT 0 1
INSERT 0 1
INSERT 0 1
INSERT 0 1
INSERT 0 1
INSERT 0 1
INSERT 0 1
INSERT 0 1
INSERT 0 1
INSERT 0 1
INSERT 0 1
INSERT 0 1
INSERT 0 1
INSERT 0 1
INSERT 0 1
INSERT 0 1
INSERT 0 1
INSERT 0 1
INSERT 0 1
INSERT 0 1
INSERT 0 1
INSERT 0 1
INSERT 0 1
id | label |
---|---|
26 | DIRECTORY 0057 |
25 | DIRECTORY 057 |
21 | DIRECTORY 1000000 |
27 | DIRECTORY 52 |
22 | DIRECTORY 57 |
24 | DIRECTORY 57000 |
23 | DIRECTORY 9999 |
9 | DISK 1 |
8 | DISK 10 |
5 | DISK 15 |
1 | DISK 2 |
13 | DISK 20 |
6 | DISK 27 |
15 | DISK 2A |
16 | DISK 2B |
17 | DISK 2B 33 |
18 | DISK 2B 4 |
10 | DISK 3 |
3 | DISK 33 |
12 | DISK 4 |
2 | DISK 5 |
14 | DISK 6 |
4 | DISK 7 |
7 | DISK 8 |
11 | DISK 9 |
19 | FILE 62 |
20 | FILE 7 |
SELECT 27
CREATE COLLATION
id | label |
---|---|
27 | DIRECTORY 52 |
26 | DIRECTORY 0057 |
25 | DIRECTORY 057 |
22 | DIRECTORY 57 |
23 | DIRECTORY 9999 |
24 | DIRECTORY 57000 |
21 | DIRECTORY 1000000 |
9 | DISK 1 |
1 | DISK 2 |
15 | DISK 2A |
16 | DISK 2B |
18 | DISK 2B 4 |
17 | DISK 2B 33 |
10 | DISK 3 |
12 | DISK 4 |
2 | DISK 5 |
14 | DISK 6 |
4 | DISK 7 |
7 | DISK 8 |
11 | DISK 9 |
8 | DISK 10 |
5 | DISK 15 |
13 | DISK 20 |
6 | DISK 27 |
3 | DISK 33 |
20 | FILE 7 |
19 | FILE 62 |
SELECT 27