| From: | Marko Tiikkaja <marko(at)joh(dot)to> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Andreas Karlsson <andreas(at)proxel(dot)se>, Andrew Gierth <andrew(at)tao11(dot)riddles(dot)org(dot)uk>, David Fetter <david(at)fetter(dot)org>, Thomas Munro <thomas(dot)munro(at)enterprisedb(dot)com>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Early WIP/PoC for inlining CTEs |
| Date: | 2019-01-27 00:15:16 |
| Message-ID: | CAL9smLAxU2ZqnSt09g6Byk9UAdAsqazVXU3n4hyq2cxxJdaWpg@mail.gmail.com |
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On Sat, Jan 26, 2019 at 12:22 AM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> Therefore, I'm reversing my previous opinion that we should not have
> an explicit NOT MATERIALIZED option. I think we should add that, and
> the behavior ought to be:
>
> * No option given: inline if there's exactly one reference.
>
> * With MATERIALIZED: never inline.
>
> * With NOT MATERIALIZED: inline regardless of the number of references.
>
This much has been obvious to most people for a long time.
.m
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