Details
-
Improvement
-
Resolution: Done
-
Major - P3
-
None
-
None
-
Fully Compatible
Description
Aliases implement various aggregation stages. Some, like $bucket and $count, are implemented as two successive stages, while others, like $project, $addFields, and $replaceRoot are implemented as cases of the SingleDocumentTransformation stage. These cases can be registered as regular document sources, so that their createFromBson constructors return a pointer.