Re: CREATE IF NOT EXISTS INDEX

From: Fabrízio de Royes Mello <fabriziomello(at)gmail(dot)com>
To: Marti Raudsepp <marti(at)juffo(dot)org>
Cc: Pgsql Hackers <pgsql-hackers(at)postgresql(dot)org>, José Luis Tallón <jltallon(at)adv-solutions(dot)net>
Subject: Re: CREATE IF NOT EXISTS INDEX
Date: 2014-10-06 01:17:43
Message-ID: CAFcNs+p4b2KHnGJSn_10AKjp3MYjjmYHGE+5_cevoAAKiR1wFQ@mail.gmail.com
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On Sun, Oct 5, 2014 at 9:52 AM, Marti Raudsepp <marti(at)juffo(dot)org> wrote:
>
> > The version 5 (attached) contains all discussed until now.
>
> From documentation:
>
> CREATE INDEX ... [ IF NOT EXISTS name | name ] ON ...
>
> Maybe I'm just slow, but it took me a few minutes to understand what
> this means. :)
>

Well, I try to show that "IF NOT EXISTS" require the "name". Is this wrong?

Anyway I fixed that way:

CREATE INDEX ... [ IF NOT EXISTS [ name ] ] ON ...

Maybe is better than the last... what you think?

> I would add a human-language explanation to IF NOT EXISTS description:
> Index name is required when IF NOT EXISTS is specified
>

Ok.

> ----
> You have resurrected this bit again, which now conflicts with git
master...
>
> - write_msg(NULL, "reading row-security enabled for table \"%s\"",
> + write_msg(NULL, "reading row-security enabled for table \"%s\"\n",
>

Ohh... sorry... again... my mistake :-( now all was fixed.

> ----
> n->concurrent = $4;
> + n->if_not_exists = false;
> n->idxname = $5;
>
> Minor stylistic thing: now that this is a constant, I would move it to
> the end together with other constant assignments, and follow the
> struct's field ordering (in both code paths):
>
> n->isconstraint = false;
> n->deferrable = false;
> n->initdeferred = false;
> n->if_not_exists = false;
>

Fixed.

Thanks again!

Regards,

--
Fabrízio de Royes Mello
Consultoria/Coaching PostgreSQL
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>> Github: http://github.com/fabriziomello

Attachment Content-Type Size
create_index_if_not_exists_v6.patch text/x-diff 10.0 KB

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