NOT IN trap
If the list of a NOT IN contains one NULL, NOT IN is never true. NOT EXISTS has no such trap.
task
Members who recommended nobody. The query with NOT IN returns 0 rows; get the right answer. Return member_id.
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- [ ] a fresh file after repack
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- [ ] which table would autovacuum pick
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- [ ] an impossible predicate
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- [ ] incremental sort under append
- [ ] is not distinct from reaches the index
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- [ ] memoize under an anti join
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