I have a query that used against an indexed column. In this
case I can use the reverse and use in or = and get the performance
I need... but in general... will the planner ever use an index when
the related column is compared using ?
I feel like the answer is no, but wanted to ask.
Roxanne
Normally there is no chance it could work,
because (a) the planner does not know all possible values of a column,
and (b) btree indexes cannot search on not equal operator.
BTW I've just made a case where - logically - it could work, but it
still does not:
create table nums ( num int4 not null,
