Re: [PATCHES] WITH DELIMITERS in COPY

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Gavin Sherry <swm(at)linuxworld(dot)com(dot)au>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: [PATCHES] WITH DELIMITERS in COPY
Date: 2002-04-14 05:02:59
Message-ID: 200204140502.g3E52xj02970@candle.pha.pa.us
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Gavin, I will do the legwork on this if you wish. I think we need to
use DefElem to store the COPY params, rather than using specific fields
in CopyStmt.

Would you send me your original patch so I am make sure I hit
everything. I can't seem to find a copy. If you would like to work on
it, I can give you what I have and walk you through the process.

---------------------------------------------------------------------------

Gavin Sherry wrote:
> Hi Bruce,
>
> On Tue, 5 Mar 2002, Bruce Momjian wrote:
>
> >
> > Seems the original title about "feature causes performance in COPY" was
> > confusing.
>
> Oops.
>
> > This patch merely fixes the identified TODO item in the
> > grammar about using WITH in COPY.
>
> Now that I look at this patch again I don't think I like the
> syntax.
>
> COPY [BINARY] <relation> [WITH OIDS] TO | FROM <file> [[USING DELIMITERS |
> WITH DELIMITER] <delimiter> [WITH NULL AS <char>]
>
> It isn't very elegant.
>
> 1) I forced the parser to be able to handle multiple WITHs, but that
> doesn't mean its right. I can't remember why I didn't propose a better
> syntax back then, such as:
>
> ... [WITH [DELIMITER <delimiter>,] [NULL AS <char>]]
>
> 2) Given (1), Why does WITH OIDS belong where it is now? Why not have it
> as an 'option' at the end?
>
> Anyone have any opinion on this?
>
>
>
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--
Bruce Momjian | http://candle.pha.pa.us
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