Re: omitting redundant join predicate

Ehab Galal <ehabgalal123(at)hotmail(dot)com> writes:
> what i expected is that the optimizer will use the redundant predicates
> to create the plan, but the execution plan itself will not execute a
> redundant predicate.

> O! I see, it's my mistake. The example i mentioned was not a good example. I tried the equality and it is working well :)

The planner has a great deal more smarts about equality conditions than
inequality conditions. There's more you can do with equalities, and
it's more useful for typical queries.

> I am using postgresql 8.5.1, I am wondering is there is any patch that
> i can run to enable it to put the actual table names instead of
> inner/outer.

Update to 8.2.

regards, tom lane