promises is very useful in time-consuming operation, such as spark data collecting.
In my daily job, I am heavy using Spark and Rmarkdown. If Rmarkdown SQL chunks could support execute Spark SQL async, which would be more convenient for the most of data miner.
Hue Notebook and many other modern Notebooks now support execute Spark SQL, Hive SQL, impala SQL in async.
In that, wish Rmarkdown could support execute SQL chunk in an async mode to save data scientist time.