Hi all, I meant any explanation on the implementation of aggregate functions in AsterixDB would be highly appreciated.
Thank you. Yours sincerely, Riyafa On 16 July 2017 at 08:01, Riyafa Abdul Hameed <[email protected]> wrote: > Dear all, > > I am trying to create aggregate functions and I see there are more than > one function descriptors for one single function. > For example the function array_count(collection) has the following > descriptors: > > > - ScalarCountAggregateDescriptor > - SerializableCountAggregateDescriptor > - CountAggregateDescriptor > > I am not sure I understand the difference between each of this. Can you > please provide and example or point me to a documentation entry to learn > how to properly implement aggregate functions? > > The function I am trying to implement is ST_Extent. > <https://postgis.net/docs/manual-1.4/ST_Extent.html> > > Thank you. > > Yours sincerely, > > Riyafa > -- Riyafa Abdul Hameed Undergraduate, University of Moratuwa Email: [email protected] Website: https://riyafa.wordpress.com/ <http://riyafa.wordpress.com/> <http://facebook.com/riyafa.ahf> <http://lk.linkedin.com/in/riyafa> <http://twitter.com/Riyafa1>
