Re: [HACKERS] path toward faster partition pruning

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От David Rowley
Тема Re: [HACKERS] path toward faster partition pruning
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Msg-id CAKJS1f9ac41yda7AKzqaME1cYhU2jSi+rs1Ui1iDMP2Jx0h-xQ@mail.gmail.com
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Ответ на Re: [HACKERS] path toward faster partition pruning  (Amit Langote <Langote_Amit_f8@lab.ntt.co.jp>)
Ответы Re: [HACKERS] path toward faster partition pruning
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On 21 February 2018 at 23:44, Amit Langote
<Langote_Amit_f8@lab.ntt.co.jp> wrote:
> Please find attached updated patches.

Thanks for updating the code.

The question I have now is around NULL handling in
partkey_datum_from_expr(). I've not managed to find a way to get a
NULL Const in there as it seems all the clauses I try get removed
somewhere earlier in planning. Do you know for a fact that a NULL
Const is impossible to get there?

I'm having to add some NULL handling there for the run-time pruning
patch but wondered if it was also required for your patch.


-- 
 David Rowley                   http://www.2ndQuadrant.com/
 PostgreSQL Development, 24x7 Support, Training & Services


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