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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 12.3 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 8.3.1 20191121 (Red Hat 8.3.1-5), 64-bit
6 rows affected
is_product_in_categories
t
is_product_in_categories
f
is_product_in_categories3
f
is_product_in_categories3
t