Hello, I'm executing using spark SQL an SQL workload on data stored in MongoDB.
i have a question about the locality of execution of the aggregation. I m wondering if the aggregation is pushed down to MongoDB (like pushing down filters and projection) or executed in spark. I m displaying the physical plan in spark, this plan includes hashaggregation operators but in the log of my MongoDB server the execution plan has pipelines for aggregation. I am really confused. thank you very much for your answers. yours sincerely Asma ZGOLLI PhD student in data engineering - computer science Email : zgollia...@gmail.com email alt: asma.zgo...@univ-grenoble-alpes.fr <zgollia...@gmail.com>
