Horton

Re: Typmod associated with multi-row VALUES constructs

Pavel Stehule <pavel.stehule@gmail.com>

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From: Pavel Stehule <pavel.stehule@gmail.com>
To: Alvaro Herrera <alvherre@2ndquadrant.com>
Cc: Tom Lane <tgl@sss.pgh.pa.us>, Kyotaro HORIGUCHI <horiguchi.kyotaro@lab.ntt.co.jp>, David G Johnston <david.g.johnston@gmail.com>, PostgreSQL Hackers <pgsql-hackers@postgresql.org>
Date: 2016-12-08T05:33:23Z
Lists: pgsql-hackers 
2016-12-07 22:17 GMT+01:00 Alvaro Herrera <alvherre@2ndquadrant.com>:

> Tom Lane wrote:
>
> > In HEAD, we could change the RTE data structure so that
> > transformValuesClause could save the typmod information in the RTE,
> > keeping the lookups cheap.
>
> Hmm, I think this would be useful for the XMLTABLE patch too.  I talked
> a bit about it at
> https://www.postgresql.org/message-id/20161122204730.
> dgipy6gxi25j4e6a@alvherre.pgsql
>
> The patch has evolved quite a bit since then, but the tupdesc continues
> to be a problem.  Latest patch is at
> https://www.postgresql.org/message-id/CAFj8pRBsrhwR636-_
> 3TPbqu%3DFo3_DDer6_yp_afzR7qzhW1T6Q%40mail.gmail.com


What do you dislike on tupdesc usage there?

regards

Pavel

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> Álvaro Herrera                https://www.2ndQuadrant.com/
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Commits

  1. Fix reporting of column typmods for multi-row VALUES constructs.