Re: Combining Aggregates

On 16 March 2016 at 23:54, Haribabu Kommi <kommi.haribabu@gmail.com> wrote:
> On Wed, Mar 16, 2016 at 8:34 AM, David Rowley
> <david.rowley@2ndquadrant.com> wrote:
>> Yes me too, so I spent several hours yesterday writing all of the
>> combine functions and serialisation/deserialisation that are required
>> for all of SUM(), AVG() STDDEV*(). I also noticed that I had missed
>> using some existing functions for bool_and() and bool_or() so I added
>> those to pg_aggregate.h. I'm just chasing down a crash bug on
>> HAVE_INT128 enabled builds, so should be posting a patch quite soon. I
>> didn't touch the FLOAT4 and FLOAT8 aggregates as I believe Haribabu
>> has a patch for that over on the parallel aggregate thread. I've not
>> looked at it in detail yet.
>
> The additional combine function patch that I posted handles all float4 and
> float8 aggregates. There is an OID conflict with the latest source code,
> I will update the patch and post it in that thread.

Thanks! I just send a series of patches which add a whole host of
serial/deserial functions, and a patch which adds some documentation.
Maybe you could base your patch on the 0005 patch, and update the
documents to remove the "All types apart from floating-point types"
text and replace that with "Yes".

-- David Rowley                   http://www.2ndQuadrant.com/PostgreSQL Development, 24x7 Support, Training & Services