Re: Proposed Query Planner TODO items

On 15 Feb, Tom Lane wrote:
> I wrote:
>> I see what is going on to make Q4 slow, too. It's this:
>> where o_orderdate >= date '1995-04-01' and o_orderdate < date '1995-04-01' + interval '3 month'
>> ...
>> As of CVS tip the issue could be eliminated by introducing
>> cross-data-type comparison operators between types date and timestamp
>> without time zone, and then making these be members of the date index
>> opclass. I'm strongly tempted to do so ...
>
> I have now done this, so if you care to re-sync with CVS tip you should
> find that the queries using this sort of date constraint go faster.
> (You do have indexes on all the date columns, no?)

I ran a test with the CAST you recommended for Q4 over the weekend:
http://developer.osdl.org/markw/dbt3-pgsql/68/

But it didn't seem to have much of an affect on Q4, compared to run
#66. I'll still give the CVS tip a try.

Mark