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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
PostgreSQL 9.6.23 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 8.4.1 20200928 (Red Hat 8.4.1-1), 64-bit
3 rows affected
id name blocks x
1 Test 1 [{"name": "Bob", "type": "INFO", "title": "CFO"}, {"type": "FOOTER"}] {"name": "Bob", "type": "INFO", "title": "CFO"}
1 Test 1 [{"name": "Bob", "type": "INFO", "title": "CFO"}, {"type": "FOOTER"}] {"type": "FOOTER"}
2 Another [{"name": "Bob", "type": "INFO", "title": "Manager"}, {"type": "FOOTER"}] {"name": "Bob", "type": "INFO", "title": "Manager"}
2 Another [{"name": "Bob", "type": "INFO", "title": "Manager"}, {"type": "FOOTER"}] {"type": "FOOTER"}
3 Final [{"id": 22, "type": "IMAGE"}] {"id": 22, "type": "IMAGE"}
2 rows affected
id name blocks
3 Final [{"id": 22, "type": "IMAGE"}]
1 New Name [{"name": "Bob", "type": "INFO", "title": "CFO"}, {"type": "FOOTER"}]
2 New Name [{"name": "Bob", "type": "INFO", "title": "Manager"}, {"type": "FOOTER"}]