[MonetDB-users] Monetdb - User defined functions

Kirk Abbott kabbott at daxpy.com
Wed Sep 3 16:16:10 CEST 2008


Thanks for your reply. I am using the sql frontend only.

I just had a look at the functions table and now see all the string/data 
extraction primitives. I am particularly interested in mimicking the 
PostgreSQL functionality (which is our main transactional/etl system).

BTW, we typically want to do ad-hoc stuff like:

> select
>   to_char(charge_date, 'yyyy-mm')
> , sum(actual_consump_adj)
> , sum(billed_consump_adj)
> , count(*)
> from
>   consumption
> group by
>   to_char(charge_date, 'yyyy-mm')
> order by
>   to_char(charge_date, 'yyyy-mm')
> ;


Martin Kersten wrote:
> Dear Kirk,
> Thank you for your interest in using MonetDB. Can you  be more specific 
> on the
> front-end you are using, e.g. SQL or XQuery.
> The SQL comes with several string/date extraction primitieves.
> It may help to understand your request by excemplifying the
> reference system you have in mind, e.g. MySQL, PostgreSQL,...
> regards, Martin
> Kirk Abbott wrote:
>> Hello,
>> We are trying to move some data over to Monetdb and are finding that we 
>> are missing some of our favorite formatting functions (to_date, to_char 
>> etc.). Does Monetdb have a user defined functions extension framework? 
>> If so, we would try to mimic these functions there.
>> Thanks,
>> Kirk.
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