Teodor Sigaev <teodor@sigaev.ru> writes:
>> Huh? Why two? Either you are allowed to cluster on indexes of this
>> type, or you're not. I don't see the point of any other distinction.
> amclusterable - as you suggest: Does cluster command something or not?
This is what we need.
> amclustered - table on such index is always clustered, cluster command does
> nothing, but optimizer/planner takes clustering into
> consideration for query planning.
"Takes clustering into account" means nothing. We don't need that. Any
such consideration would be handled by the AM-specific amcostestimate
function.
regards, tom lane
