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From Julian Hyde <>
Subject Re: Documentation around writing a custom cost factory
Date Wed, 01 Mar 2017 19:01:39 GMT
You’re talking about RelOptCostFactory, right? I don’t think there is any documentation.

I found this:!topic/optiq-dev/Q0_ix4fyivs <!topic/optiq-dev/Q0_ix4fyivs>


> On Feb 28, 2017, at 10:29 PM, Hussain Pirosha <> wrote:
> Hi Everyone,
> I was looking for some documentation/example on plugging in a cost factory.
> Once the logical plan is converted to actual execution plan,  what all api's are used
by the planner in calculating cost.
> Any pointers regarding the working of cost factory and how it is used by a planner shall
be helpful.
> Thanks,
> Hussain
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