Peter Eisentraut <pete...@gmx.net> writes: > ... But again, this is data type specific knowledge.
Actually, now that I think about it, the planner already has datatype-specific knowledge about boolean equality (see simplify_boolean_equality). It would take just a few more lines of code there to recognize "x <> true" and "x <> false" as additional variant spellings of the generic "x" or "NOT x" constructs. Not sure if it's worth the trouble though; how many people really write such things? If you really wanted to take it to extremes, you could also reduce cases like "x > false", but that's starting to get a bit silly. regards, tom lane -- Sent via pgsql-bugs mailing list (pgsql-bugs@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-bugs