I think it will make sense to show a sample implementation of UserDefinedAggregateFunction for DataFrames, and an example of the Aggregator API for typed Datasets.
Jim, what if I submit a PR and you join the review process? I also do not mind to split this if you want, but it seems to be an overkill for this part. Jayesh, shall I skip the window functions part since you are going to work on that? 2016-12-15 22:48 GMT+01:00 Thakrar, Jayesh <jthak...@conversantmedia.com>: > I too am interested in expanding the documentation for Spark SQL. > > For my work I needed to get some info/examples/guidance on window > functions and have been using https://databricks.com/blog/ > 2015/07/15/introducing-window-functions-in-spark-sql.html . > > How about divide and conquer? > > > > > > *From: *Michael Armbrust <mich...@databricks.com> > *Date: *Thursday, December 15, 2016 at 3:21 PM > *To: *Jim Hughes <jn...@ccri.com> > *Cc: *"dev@spark.apache.org" <dev@spark.apache.org> > *Subject: *Re: Expand the Spark SQL programming guide? > > > > Pull requests would be welcome for any major missing features in the > guide: https://github.com/apache/spark/blob/master/docs/ > sql-programming-guide.md > > > > On Thu, Dec 15, 2016 at 11:48 AM, Jim Hughes <jn...@ccri.com> wrote: > > Hi Anton, > > I'd like to see this as well. I've been working on implementing > geospatial user-defined types and functions. Having examples of > aggregations and window functions would be awesome! > > I did test out implementing a distributed convex hull as a > UserDefinedAggregateFunction, and that seemed to work sensibly. > > Cheers, > > Jim > > > > On 12/15/2016 03:28 AM, Anton Okolnychyi wrote: > > Hi, > > > > I am wondering whether it makes sense to expand the Spark SQL programming > guide with examples of aggregations (including user-defined via the > Aggregator API) and window functions. For instance, there might be a > separate subsection under "Getting Started" for each functionality. > > > > SPARK-16046 seems to be related but there is no activity for more than 4 > months. > > > > Best regards, > > Anton > > > > >
