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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 t (col1 serial, createdon timestamptz);
CREATE TABLE
INSERT INTO t (createdon) VALUES (NULLIF('2022-12-19 14:37:20.455939+00','')::timestamptz);
INSERT INTO t (createdon) VALUES (NULLIF('','')::timestamptz);
INSERT 0 1
INSERT 0 1
SELECT * FROM t
| col1 | createdon |
|---|---|
| 1 | 2022-12-19 14:37:20.455939+00 |
| 2 | null |
SELECT 2