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[EP-tech] EPrints Database entity relationship diagram



Thanks! I thought that was likely to be the case but at least I can back that up now :)

-----Original Message-----
From: eprints-tech-bounces at ecs.soton.ac.uk [mailto:eprints-tech-bounces at ecs.soton.ac.uk] On Behalf Of Alan.Stiles
Sent: 14 December 2017 16:46
To: eprints-tech at ecs.soton.ac.uk
Subject: Re: [EP-tech] EPrints Database entity relationship diagram

I've just tried creating a model of our instance from the database tool we use.  It took 20 pages just to draw the database tables, though 5 pages of that were probably cache tables.  That's without drawing any links between the tables, or leaving enough space to discern which line goes from where to where...
We have something like 60 tables that all start eprints_* e.g. creators_name, creators_id, editors_name...  I really don't want to try drawing that ERD alone, never mind including the user table or the REF2014 plugin tables!

I once got asked for similar by our central IT team (possibly "Do you have a list of fields in the database?") Once I started explaining the volume of stuff they were asking about they decided they had a much more specific query to ask!

Alan

-----Original Message-----
From: eprints-tech-bounces at ecs.soton.ac.uk [mailto:eprints-tech-bounces at ecs.soton.ac.uk] On Behalf Of David R Newman
Sent: 14 December 2017 16:10
To: eprints-tech at ecs.soton.ac.uk
Subject: Re: [EP-tech] EPrints Database entity relationship diagram

Hi Andrew,

I am not aware of one and they would vary between repositories sufficiently significantly that you would need a tool to produce one rather than having one ER diagram for all repositories.  You may be able to generate something comparable from the XML schema at:

https://eprints.lincoln.ac.uk/cgi/schema

It may also be possible to run a tool against the database directly.
 Something like http://search.cpan.org/dist/SQL-Translator/script/sqlt-
diagram will probably do the job.  However, I do not know how well the relationships between tables (i.e. foreign keys) have been defined.  So  you may just see a load of unassociated tables.  As the linking of tables is managed for the Perl-coded EPrints API.

Regards

David Newman

On Thu, 2017-12-14 at 15:48 +0000, Andrew Beeken wrote:
> Hi all!
>
> Is there an entity relationship diagram available for the EPrints 
> database? I?ve been asked by our databases team if I can provide one 
> and I don?t particularly relish the idea of drawing one up myself!
>
> Thanks in advance!
> Andrew
>
>
>
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