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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 14.1 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 8.5.0 20210514 (Red Hat 8.5.0-4), 64-bit
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kundenid sname sstandort id kundenid idlieferadressen id lstandort
1 Stammkunde Bremen 100 1 10 10 Hamburg
1 Stammkunde Bremen 101 1 11 11 Kassel
2 guter Stammkunde München 105 2 10 10 Hamburg
2 guter Stammkunde München 103 2 11 11 Kassel
2 guter Stammkunde München 102 2 12 12 Neuss
3 schlechter kunde Dortmund 104 3 11 11 Kassel