Re: Mass Import/Generate PKs

the simplest way to do it seems to be adding a SERIAL column to your table, and then adding a primary key constraint:

1)insert data into table
2)ALTER TABLE <table> ADD id SERIAL;
3)ALTER TABLE <table> ADD CONSTRAINT <table>_pk PRIMARY KEY (id);

you can check the docs for the SERIAL type: http://www.postgresql.org/docs/7.4/static/datatype.html#DATATYPE-SERIAL

On Sat, 2004-11-06 at 17:29, Hunter Hillegas wrote:

That sounds nice and easy...

So, I would do something like 'ALTER TABLE' to generate the PK column? What
would be the best way to populate it? Is there an area of doco I should be
looking at?

Thanks,
Hunter


> From: Peter Eisentraut <peter_e@gmx.net>
> Date: Sat, 6 Nov 2004 21:21:25 +0100
> To: Hunter Hillegas <lists@lastonepicked.com>, PostgreSQL
> <pgsql-general@postgresql.org>
> Subject: Re: [GENERAL] Mass Import/Generate PKs
> 
> Hunter Hillegas wrote:
>> I have a CSV file with 400,000 lines of email mailing list
>> information that I need to migrate to a new PostgreSQL database.
>> 
>> Each line has all the info I need except a PK (I usually use an int4
>> column for a PK).
> 
> You could import the file into PostgreSQL and add a primary key column
> later.
> 
> -- 
> Peter Eisentraut
> http://developer.postgresql.org/~petere/
> 



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