"Neil Conway" <neilc(at)samurai(dot)com> wrote
>
> This would also be useful when diagnosing bad query plans: for example,
> setting enable_seqscan=false often causes the planner to disregard the
> use of *any* sequential scan, anywhere in the plan. The ability to
> slightly bump up the cost of particular operations would allow more
> alternative plans to be examined.
>
This method also has the problem of "enable_seqscan=false" in some
situations. I would vote we implement the final general solution like query
plan hints directly.
Regards,
Qingqing