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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?.
DROP TABLE
CREATE TABLE
INSERT 0 17
ANALYZE
datum | f1 | f2 | f3 |
---|---|---|---|
2017-12-31 | A | A | A |
2018-01-01 | A | A | A |
2018-01-02 | A | A | A |
2018-01-03 | A | A | A |
2018-01-04 | A | A | A |
2018-01-05 | A | A | A |
2018-01-06 | B | B | B |
2018-01-07 | B | B | B |
2018-01-08 | B | B | B |
2018-01-09 | B | B | B |
2018-01-10 | B | B | B |
2018-01-11 | A | A | A |
2018-01-12 | A | A | A |
2018-01-13 | A | A | A |
2018-01-14 | A | A | A |
2018-01-15 | A | A | A |
2018-01-16 | A | A | A |
SELECT 17