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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?.
1 rows affected
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id | groupid |
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1 | group1 |
2 | group2 |
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id | userid | groupid |
---|---|---|
1 | user1 | group1 |
2 | user2 | group1 |
3 | user3 | group2 |
4 | user4 | group2 |
5 | user5 | group2 |
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id | orderid | userid |
---|---|---|
1 | order1 | user1 |
2 | order2 | user2 |
3 | order3 | user2 |
4 | order4 | user4 |
count_user | groupid |
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2 | group1 |
3 | group2 |
count_order | groupid |
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3 | group1 |
1 | group2 |
groupid | count_user | count_order |
---|---|---|
group1 | 2 | 3 |
group2 | 3 | 1 |