liukun4515 commented on pull request #1408: URL: https://github.com/apache/arrow-datafusion/pull/1408#issuecomment-994243149
In the comments, @alamb gives some comments about the precision or scale for the result data type. I want to follow the guidance document https://www.postgresql.org/docs/8.2/functions-aggregate.html at first but can't find some useful suggestions. So I follow the behavior in the spark [sun](https://github.com/apache/spark/blob/c75186cd111b91d13e32159169334d562bdeb767/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Sum.scala#L66) and [avg](https://github.com/apache/spark/blob/c75186cd111b91d13e32159169334d562bdeb767/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Average.scala#L66). -- 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]
