"Rod Taylor" <rbt@zort.ca> writes:
> Is this what the TODO entry 'Make IN / NOT IN have similar performance
> as EXISTS' means?
No. The TODO item is talking about IN with a sub-SELECT, which is not
optimized at all at the moment. IN with a list of scalar values is
converted to ((x = value1) OR (x = value2) OR ...), which we can do
something with.
regards, tom lane