[Koha] DB Documentation Question

Galen Charlton gmc at esilibrary.com
Fri Aug 17 03:12:15 NZST 2012


On 08/15/2012 09:01 AM, Nicole Engard wrote:
> Does anyone know what reserves.constrainttype is? It has an 'o' or an
> 'a' in my database but I'm not sure what causes what value or what
> each stands for.

Chris or Paul may know the history, but I think what constrainttype is 
_supposed_ to do is allow one to distinguish between a copy-level (or 
biblioitem-level?) hold (type 'o') and a title-level hold (type 'a'). 
Or was it meant to be "metabib" (type 'a') versus biblioitem (type 'o')?

However, as near as I can tell, at present 'a' and 'o' holds currently 
behave identically, and the only code that creates holds with a type 
other than 'a' is the serial routing list.  In other words, I'm 99% sure 
that the reservecontraints mechanism doesn't work at all, and is a 
carry-over from 2.x that it may be better to drop.

I would be grateful if anybody with knowledge of the original intent of 
the hold constraint feature could share what they know.


Galen Charlton
Director of Support and Implementation
Equinox Software, Inc. / The Open Source Experts
email:  gmc at esilibrary.com
direct: +1 770-709-5581
cell:   +1 404-984-4366
skype:  gmcharlt
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