>>>>> "Alexander" == Alexander Kuzmenkov <a.kuzmen...@postgrespro.ru> writes:

 Alexander> Structurally, the patch consists of two major parts: a
 Alexander> specialized executor node


It strikes me that the significant fact here is not that we're doing
count(*), but that we don't need any columns from the bitmap heap scan
result.  Rather than creating a whole new node, can't the existing
bitmap heapscan be taught to skip fetching the actual table page in
cases where it's all-visible, not lossy, and no columns are needed?

(this would also have the advantage of getting parallelism for free)

Andrew (irc:RhodiumToad)

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