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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?.
1000 rows affected
QUERY PLAN |
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Index Only Scan using demo_ab on demo (cost=0.28..4.29 rows=1 width=8) |
Index Cond: (a = 999) |
QUERY PLAN |
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Seq Scan on demo (cost=0.00..17.50 rows=1 width=8) |
Filter: (b = 999) |
QUERY PLAN |
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Index Only Scan using demo_ab on demo (cost=0.28..4.29 rows=1 width=8) |
Index Cond: ((a = 999) AND (b = 999)) |
QUERY PLAN |
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Index Only Scan using demo_ab on demo (cost=0.28..4.29 rows=1 width=8) |
Index Cond: ((a = 999) AND (b > 999)) |
QUERY PLAN |
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Index Only Scan using demo_ab on demo (cost=0.28..4.29 rows=1 width=8) |
Index Cond: ((a > 999) AND (b = 999)) |
QUERY PLAN |
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Index Only Scan using demo_ab on demo (cost=0.28..4.29 rows=1 width=8) |
Index Cond: ((a > 999) AND (b > 999)) |