Re: About COPY command (and probably file fdw too)

Hi,
I agree, pgloader seems to be right. And yes, it’s a matter of complexity and usability estimation.
Stefan

From: David G. Johnston
Sent: Friday, May 22, 2015 12:19 AM
To: Nicolas Paris
Cc: Stefan Stefanov ; Forums postgresql
Subject: Re: [GENERAL] About COPY command (and probably file fdw too)

On Thu, May 21, 2015 at 1:33 PM, Nicolas Paris <niparisco(at)gmail(dot)com> wrote:

Hi,

To me this would be great. Why not the ability to restrict lines too
COPY stafflist (userid, username, staffid)
FROM 'myfile.txt'
WITH (FORMAT text, DELIMITER E'\t', COLUMNS (1, 2, 7), LINES(2:1000,2000:3000), ENCODING 'windows-1250')

=> subset of full data.

​At some level of complexity it is questionable whether a feature belongs in core that can exist outside of it.
While I have not yet personally used pgloader it seems to accomplish much of what is being requested.
http://pgloader.io/index.html
COPY (and \copy) serves its purpose extremely well​ ​but expects the user to deal with any customization needed either before or after it has done its thing. I believe this is for the best since such customizations and tools have no need to operate on the same release cycle as the core PostgreSQL project.
David J.
​