Re: Re: COPY BINARY file format proposal

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Philip Warner <pjw(at)rhyme(dot)com(dot)au>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: Re: COPY BINARY file format proposal
Date: 2000-12-10 23:50:23
Message-ID: 200012102350.SAA10451@candle.pha.pa.us
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-hackers

> Also, IIRC part of the problem with text-based COPY is that we can't
> specify field order (I think this affectes dumping the regression DB).
> Would it be possible to add the ability to (a) specify field order, and (b)
> dump a subset of fields?

Informix does this nicely:

UNLOAD TO "file"
SELECT *
FROM tab

Merging COPY and SELECT has some real advantages. You can specify
columns, parts of a table using WHERE, and even joins. Very flexible.

Perhaps, if the table name is missing from COPY, we can allow a SELECT:

COPY TO 'file'
SELECT *
FROM tab

--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
+ Christ can be your backup. | Drexel Hill, Pennsylvania 19026

In response to

Browse pgsql-hackers by date

  From Date Subject
Next Message Bruce Momjian 2000-12-10 23:53:11 Re: RFC C++ Interface
Previous Message Bruce Momjian 2000-12-10 23:48:22 Re: Re: COPY BINARY file format proposal