Re: Encountered an error - Mailing list psycopg

From Karsten Hilbert
Subject Re: Encountered an error
Date
Msg-id 20160310220319.GR9358@hermes.hilbert.loc
Whole thread Raw
In response to Re: Encountered an error  (Shaan Repswal <shaun.reapswaal@gmail.com>)
Responses Re: Encountered an error
List psycopg
On Fri, Mar 11, 2016 at 01:16:33AM +0530, Shaan Repswal wrote:

> I am new to databases and am a novice to programming in general.

Don't worry.

> @Karsten - I know, I got the feeling that the design felt awry as well. The
> database will be on the local machine. And the client side will have the
> code to error check the column names being added and also if there already
> is a column by this name or not.

You can add a second table (pseudo code)

    inventory_detail
        pk serial primary key
        fk_inventory integer foreign key (inventory.pk)
        detail_name text
        detail_value text

and then - instead of creating columns in table inventory -
add rows to the inventory_detail table where .detail_name
would hold what otherwise would be the column name of the new
column in inventory and .detail_value the value you would
have put into the new column in table inventory. The
fk_inventory column would hold the primary key of the row in
the inventory table this inventory_detail row belongs to.

Just a suggestion.

Karsten
--
GPG key ID E4071346 @ eu.pool.sks-keyservers.net
E167 67FD A291 2BEA 73BD  4537 78B9 A9F9 E407 1346


psycopg by date:

Previous
From: Adrian Klaver
Date:
Subject: Re: Encountered an error
Next
From: Dan Sawyer
Date:
Subject: unable to connect to postgres db via psycopy