[SERVER-82721] Refactor run_aggregate to use a helper function that prepares the pipeline Created: 02/Nov/23  Updated: 03/Nov/23

Status: Backlog
Project: Core Server
Component/s: None
Affects Version/s: None
Fix Version/s: None

Type: Improvement Priority: Major - P3
Reporter: Will Buerger Assignee: Backlog - Query Integration
Resolution: Unresolved Votes: 0
Labels: quick-tech-debt
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Issue Links:
Depends
depends on SERVER-82228 Refactor run_aggregate with a Aggrega... Backlog
Assigned Teams:
Query Integration
Participants:

 Description   

Preparation of the parsed mongo::Pipeline seems to be one logical step in the overall run_aggregate path. We should break it into a helper function to clean up the high-level path, whether the input is the aggregation plan and the resolved collation, and the output is the pipeline (which includes the expression context). In summary, this step will make the expression context, parse the pipeline, register query stats, optimize and rewrite the pipeline as necessary, and coordinate small checks along the way.


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