LiaCastaneda opened a new issue, #22993: URL: https://github.com/apache/datafusion/issues/22993
### Is your feature request related to a problem or challenge? DataFusion currently has no support for aggregate function `map_agg` , which is supported in other engines like [trino](https://trino.io/docs/current/functions/aggregate.html#map_agg) , [presto](https://prestodb.io/docs/current/functions/aggregate.html#map_agg), [map_from_arrays](https://spark.apache.org/docs/latest/api/python/reference/pyspark.sql/api/pyspark.sql.functions.map_from_arrays.html) (not UDAF), [json_object_agg](https://www.postgresql.org/docs/current/functions-aggregate.html) in postgres ### Describe the solution you'd like Extend the api `AggregateUDFImpl` to implement `MapAgg`. The expected behavior should be somehting like: ``` SELECT k, map_agg(v, m) FROM (VALUES ('a', 1, 10), ('a', 2, 20), ('b', 3, 30) ) t(k, v, m) GROUP BY k; ``` ``` k | map_agg(v, m) --+------------------ a | {1: 10, 2: 20} b | {3: 30} ``` ### Describe alternatives you've considered Implement it in our codebase, but given the generic behavior of this function and the fact that it exists in other engines, I think it would be worth upstreaming. ### Additional context _No response_ -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
