Simon Riggs <[email protected]> writes:
> On 13 June 2016 at 19:16, Tom Lane <[email protected]> wrote:
>> Another point here is that I'm now unconvinced that restricting the logic
>> to consider only multi-column fkeys is really what we want. It looks to
>> me like the code can also improve estimates in the case where there are
>> multiple single-column FKs linking to the same target relation. That
>> might not be too common for two-table queries, but I bet it happens a
>> lot in three-or-more-table queries.
> Is it realistic that we consider that at this point? Certainly not for
> myself, at least.
It's pretty much built into the redesign I proposed, or so I thought.
regards, tom lane
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