asterixdb-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Ahmed Eldawy <eld...@cs.ucr.edu>
Subject Re: Aggregate functions again
Date Tue, 01 Aug 2017 16:23:39 GMT
Hi Riyafa,

Can you please clarify what errors you got with your implementation? Is it
a compilation error or a runtime error? If it is a runtime error, please
share the query that you are trying to run and what the error is.

Thanks
Ahmed

On Mon, Jul 31, 2017 at 4:13 AM, Riyafa Abdul Hameed <
riyafa.12@cse.mrt.ac.lk> wrote:

> Hi all,
> If someone could at least mention the newest aggregate function created if
> any that would be of great help. Then I can go through commit history to
> find implementation details.
>
> Thank you.
> Sincerely,
> Riyafa
>
> On 30 July 2017 at 13:52, Riyafa Abdul Hameed <riyafa@apache.org> wrote:
>
> > Dear all,
> >
> > I want to simply create an aggregate function that for the moment need
> not
> > run on a cluster. It only needs to run on a single machine.
> > I tried the following
> >
> >    - I created 2 descriptors ScalarSTUnionAggregateDescriptor[1] and
> >    STUnionAggregateDescriptor[2]
> >    - Then added those to the BuiltinFunctions[3] and named the scalar
> >    descriptor as st-union with arity 1 and the other descriptor as
> >    agg-st-union with arity 1.
> >    - And added these  functions to the FunctionCollection[4] using the
> >    temp field
> >
> > This hasn't worked.
> >
> > Can someone please guide me with the minimal classes that needs to be
> > created and the naming conventions that needs to be used?  And where to
> add
> > in these classes in BuiltinFunctions and FunctionCollection?
> >
> > I am asking for help again and again (really begging) because it is the
> > most unclear task I have been trying to do. If I can finally get this
> done
> > I certainly hope to write a comprehensive documentation so that future
> > *remote* developers won't fall into the same trouble of figuring out "how
> > to properly write an aggregate function?"
> >
> > I only want it to work locally at first. Not about distributed settings.
> > Please help.
> >
> > Thank you.
> >
> > Sincerely,
> >
> > Riyafa
> >
> > [1] https://github.com/riyafa/asterixdb/blob/
> > 0b1cdd8090fff82026401ce399383965baefd620/asterixdb/asterix-
> > runtime/src/main/java/org/apache/asterix/runtime/aggregates/scalar/
> > ScalarSTUnionAggregateDescriptor.java
> >
> > [2] https://github.com/riyafa/asterixdb/blob/
> > 0b1cdd8090fff82026401ce399383965baefd620/asterixdb/asterix-
> > runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/
> > STUnionAggregateDescriptor.java
> >
> > [3]https://github.com/riyafa/asterixdb/blob/
> 0b1cdd8090fff82026401ce3993839
> > 65baefd620/asterixdb/asterix-om/src/main/java/org/apache/
> > asterix/om/functions/BuiltinFunctions.java
> >
> > [4] https://github.com/riyafa/asterixdb/blob/
> > d99fd65d897cea12e5df5449390238e4a05fa151/asterixdb/asterix-
> > runtime/src/main/java/org/apache/asterix/runtime/
> > functions/FunctionCollection.java
> >
>
>
>
> --
> Riyafa Abdul Hameed
> Undergraduate, University of Moratuwa
>
> Email: riyafa.12@cse.mrt.ac.lk
> Website: https://riyafa.wordpress.com/ <http://riyafa.wordpress.com/>
> <http://facebook.com/riyafa.ahf>  <http://lk.linkedin.com/in/riyafa>
> <http://twitter.com/Riyafa1>
>



-- 

Ahmed Eldawy
Assistant Professor
http://www.cs.ucr.edu/~eldawy
Tel: +1 (951) 827-5654

Mime
  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message