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help / color / mirror / Atom feedFrom: David G. Johnston <[email protected]>
To: Tom Lane <[email protected]>
Cc: Bruce Momjian <[email protected]>
Cc: Pavlo Golub <[email protected]>
Cc: Laurenz Albe <[email protected]>
Cc: [email protected] <[email protected]>
Subject: Re: COPY manual is ambiguous about column list
Date: Thu, 19 Dec 2019 22:33:48 -0700
Message-ID: <CAKFQuwYHOpSfBcyX33Avt3ncrDsu6pxb-LXTm0SA+-nGWVSbhQ@mail.gmail.com> (raw)
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<[email protected]>
On Thursday, December 19, 2019, Tom Lane <[email protected]> wrote:
> "David G. Johnston" <[email protected]> writes:
> > Seems better to simply talk about each form independently:
>
> > If a list of columns is specified, <command>COPY TO</command> will only
> > copy the data in the specified columns to the file. <command>COPY
> > FROM</command> will, by position (i.e., the number of columns listed must
> > match the number of columns in the file), match each file column to the
> > named column in the table. Any additional columns present in the table
> > will receive their default value.
>
> +1 for separating it like that, but your middle sentence reads awkwardly
> to me. How about something like
>
> <command>COPY FROM</command> will match each listed column in the table
> to a file column by position (so the number of columns listed must match
> the number of columns in the file).
>
>
>
+1
David J.
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Subject: Re: COPY manual is ambiguous about column list
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