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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?.
version |
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PostgreSQL 13.4 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 8.4.1 20200928 (Red Hat 8.4.1-1), 64-bit |
6 rows affected
id | lag_dc | cs | dc | lead_dc | ce |
---|---|---|---|---|---|
1 | -infinity | green | 2020-05-27 16:33:52+01 | 2020-06-11 20:12:18+01 | yellow |
1 | 2020-05-27 16:33:52+01 | yellow | 2020-06-11 20:12:18+01 | 2020-06-11 20:20:58+01 | red |
1 | 2020-06-11 20:12:18+01 | red | 2020-06-11 20:20:58+01 | infinity | green |
2 | -infinity | green | 2020-08-06 14:59:21+01 | 2021-03-03 14:31:44+00 | yellow |
2 | 2020-08-06 14:59:21+01 | yellow | 2021-03-03 14:31:44+00 | infinity | red |
3 | -infinity | green | 2021-04-28 12:36:45+01 | infinity | red |
id | df | dt | cs |
---|---|---|---|
1 | -infinity | 2020-05-27 16:33:52+01 | green |
2 | -infinity | 2020-08-06 14:59:21+01 | green |
3 | -infinity | 2021-04-28 12:36:45+01 | green |
id | dc | lead_dc | ce |
---|---|---|---|
1 | 2020-06-11 20:20:58+01 | infinity | green |
2 | 2021-03-03 14:31:44+00 | infinity | red |
3 | 2021-04-28 12:36:45+01 | infinity | red |
id | dc | lead_dc | ce |
---|---|---|---|
1 | 2020-05-27 16:33:52+01 | 2020-06-11 20:12:18+01 | yellow |
1 | 2020-06-11 20:12:18+01 | 2020-06-11 20:20:58+01 | red |
2 | 2020-08-06 14:59:21+01 | 2021-03-03 14:31:44+00 | yellow |
id | Date from: | Date to: | Colour |
---|---|---|---|
1 | -infinity | 2020-05-27 16:33:52+01 | green |
1 | 2020-05-27 16:33:52+01 | 2020-06-11 20:12:18+01 | yellow |
1 | 2020-06-11 20:12:18+01 | 2020-06-11 20:20:58+01 | red |
1 | 2020-06-11 20:20:58+01 | infinity | green |
2 | -infinity | 2020-08-06 14:59:21+01 | green |
2 | 2020-08-06 14:59:21+01 | 2021-03-03 14:31:44+00 | yellow |
2 | 2021-03-03 14:31:44+00 | infinity | red |
3 | -infinity | 2021-04-28 12:36:45+01 | green |
3 | 2021-04-28 12:36:45+01 | infinity | red |
9 rows affected
id | ts_from | ts_to | colour |
---|---|---|---|
2 | 2021-03-03 14:31:44+00 | infinity | red |
3 | 2021-04-28 12:36:45+01 | infinity | red |
colour | count |
---|---|
green | 2 |
yellow | 1 |