[postgis-tickets] [PostGIS] #3836: Parallel support for ST_CountAgg, ST_SummaryStatsAgg

[PostGIS]

#3836: Parallel support for ST_CountAgg, ST_SummaryStatsAgg
----------------------+---------------------------
  Reporter:  pramsey  |      Owner:  pramsey
      Type:  defect   |     Status:  assigned
  Priority:  medium   |  Milestone:  PostGIS 2.5.0
 Component:  postgis  |    Version:  trunk
Resolution:           |   Keywords:
----------------------+---------------------------
Description changed by pramsey:

Old description:

> Continuing from #3751.
>
> * ST_CountAgg
> * ST_SummaryStatsAgg
>
> These two aggregates are candidates for parallel aggregation. They are
> already marked parallel safe in their current incarnation.
>
> They require a combinefunc, and serialize/deserialize functions.
> Unfortunately each has several different SQL function parameterizations,
> so it'll be a little complex to carry out.

New description:

 Continuing from #3751.

 * ST_CountAgg
 * ST_SummaryStatsAgg

 These two aggregates are candidates for parallel aggregation. They are
 already marked parallel safe in their current incarnation.

 They require a combinefunc, and serialize/deserialize functions.
 Unfortunately each has several different SQL function parameterizations,
 so it'll be a little complex to carry out.

 * https://www.postgresql.org/docs/9.6/static/sql-createaggregate.html
 * https://www.postgresql.org/docs/9.6/static/xaggr.html#XAGGR-PARTIAL-
 AGGREGATES

--

--
Ticket URL: <https://trac.osgeo.org/postgis/ticket/3836#comment:1>
PostGIS <http://trac.osgeo.org/postgis/>
The PostGIS Trac is used for bug, enhancement & task tracking, a user and developer wiki, and a view into the subversion code repository of PostGIS project.