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A PG 17 optimization allowed columns with NOT NULL constraints to skip table scans for IS NULL queries, and to skip IS NOT NULL checks for IS NOT NULL queries. This didn't work for domain types, since domain types don't follow the IS NULL/IS NOT NULL constraint logic. To fix, disable this optimization for domains for PG 17+. Reported-by: Jan Behrens Diagnosed-by: Tom Lane Discussion: https://postgr.es/m/Z37p0paENWWUarj-@momjian.us Backpatch-through: 17 |
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