Regarding this item: "Allow hash lookup for NOT IN clauses with many constants (David Rowley, James Coleman) Previously the code always sequentially scanned the list of values."
The todo list has an entry titled "Planning large IN lists", which links to https://www.postgresql.org/message-id/1178821226.6034.63.camel@goldbach Did we already have a hash lookup for IN clauses with constants and the above commit adds NOT IN? If so, maybe we have enough to remove this todo item. -- John Naylor EDB: http://www.enterprisedb.com
