RegTAP Post-RFC: aggregate functions

[Theresa Dower]

The VAO registry at STScI is already supporting some string aggregation of registry fields at the service level for non-standard search interfaces, and even cacheing some of the processed results in the registry database. I am tentatively for adding these, pending an attempt to implement something like the examples I've found for string_agg within our database/architecture and doing some timing tests.

--Theresa

-----Original Message-----
From: registry-bounces at ivoa.net [mailto:registry-bounces at ivoa.net] On Behalf Of Mark Taylor
Sent: Friday, May 23, 2014 4:41 AM
To: Markus Demleitner
Cc: registry at ivoa.net
Subject: Re: RegTAP Post-RFC: aggregate functions

On Wed, 21 May 2014, Markus Demleitner wrote:

> So, this is about requiring UDFs analogous to postgres' string_agg or 
> array_agg for RegTAP, like we now require ivo_nocasematch and friends.

I'd use them if they were there.
Given the choice of just one, I'd rather see array_agg.

Mark

--
Mark Taylor   Astronomical Programmer   Physics, Bristol University, UK
m.b.taylor at bris.ac.uk +44-117-9288776  http://www.star.bris.ac.uk/~mbt/