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

["David G. Johnston" <david.g.johnston@xxxxxxxxx>]

On Thu, May 21, 2015 at 1:33 PM, Nicolas Paris <niparisco@xxxxxxxxx> 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.

​