[SERVER-60282] Don't push down $group when doingMerge is true Created: 28/Sep/21  Updated: 29/Oct/23  Resolved: 29/Sep/21

Status: Closed
Project: Core Server
Component/s: None
Affects Version/s: Backlog
Fix Version/s: 5.1.0-rc0

Type: Task Priority: Major - P3
Reporter: Eric Cox (Inactive) Assignee: Eric Cox (Inactive)
Resolution: Fixed Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Backwards Compatibility: Fully Compatible
Sprint: QE 2021-10-04
Participants:

 Description   

SERVER-60253 was a temporary fix to help unblock the correctness project, this is a real fix where we use this check which doesn't push group down when doingMerge=true. This flag indicates that the $group is processing data in a sharded cluster or when spilling. When sharding is implemented we will do the sharding check in mongos code, and when spill is implemented we need to remove this flag.



 Comments   
Comment by Vivian Ge (Inactive) [ 06/Oct/21 ]

Updating the fixversion since branching activities occurred yesterday. This ticket will be in rc0 when it’s been triggered. For more active release information, please keep an eye on #server-release. Thank you!

Comment by Githook User [ 29/Sep/21 ]

Author:

{'name': 'Eric Cox', 'email': 'eric.cox@mongodb.com', 'username': 'ericox'}

Message: SERVER-60282 Only pushdown $group stages when not merging
Branch: master
https://github.com/mongodb/mongo/commit/05dd4c09160867fc3e9ef370a8ba2991c883fe40

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