On 04/19/2017 01:13 PM, Henry M wrote:
I was just reading this question on reddit (the text duplicated
below). I was wondering if there is an approach for handling array
foreign key references. I am interested in the answer since I started
using array fields as well. Thank you.
----- below is the message from the reddit poster:
https://www.reddit.com/r/PostgreSQL/comments/66a74t/question_referential_integrity_between_elements/
First off, thanks for taking the time. I don't see any "weekly help
threads" or anything so I hope it's okay I made a post.
/The Problem/
I'm extending our CRM database in order to manage the ISO
documentation of the company for which I work. We need, as part of
ISO, to keep track of project development meetings and attendees.
Currently, I have a "meetings" table with an attendee list as an array
of integers, each element corresponding to the id field in the
"person" table.
How do I enforce referential integrity between elements of this array
and the id field in "person"? All I could find was a proposed change
for 9.2 or 9.3 that got shot down...
Please help. I don't want to do a join table.
Unless you have thousands of attendees per meeting and everyone in
multiple meetings per day I would encourage a join table. What's your
hesitation for doing so? Note I'm an array user myself, so not against
arrays per se, but there should be a justification for denormalizing
(depending your definition thereof).
