hagerf commented on issue #26087: [SPARK-29427][SQL] Create KeyValueGroupedDataset from existing columns in DataFrame URL: https://github.com/apache/spark/pull/26087#issuecomment-553409351 @cloud-fan In my cases I'm joining multi-terabyte DFs with each other, but I'm just interested in a subset of the combinations. Using `cogroup` gives me the power to do some special logic, e.g. sorting, binary searches etc. to generate just the tuples I need. From doing joining to cogrouping made an immense difference.
---------------------------------------------------------------- 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. For queries about this service, please contact Infrastructure at: [email protected] With regards, Apache Git Services --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
