[SERVER-63283] Add query knob to guard HJ plans for $lookup Created: 03/Feb/22  Updated: 29/Oct/23  Resolved: 09/Mar/22

Status: Closed
Project: Core Server
Component/s: None
Affects Version/s: None
Fix Version/s: 6.0.0-rc0

Type: Task Priority: Major - P3
Reporter: Eric Cox (Inactive) Assignee: Eric Cox (Inactive)
Resolution: Fixed Votes: 0
Labels: sbe
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Issue Links:
Duplicate
is duplicated by SERVER-59003 Enable Feature flag for PM-2449 Closed
Related
is related to SERVER-63310 Introduce a runtime configurable quer... Closed
Backwards Compatibility: Fully Compatible
Sprint: QE 2022-02-07, QE 2022-03-21
Participants:

 Description   

We need to add a runtime-settable query knob to enable users to opt into using HashJoin for $lookup pushdown to SBE.



 Comments   
Comment by Githook User [ 08/Mar/22 ]

Author:

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

Message: SERVER-63283 Add query knob to guard HJ plans for $lookup
Branch: master
https://github.com/mongodb/mongo/commit/0b33ab1e493256033622de35cf0857447b70dbd4

Comment by Ethan Zhang (Inactive) [ 16/Feb/22 ]

This is the same as SERVER-63310 for $lookup. So sending to product triage as well.

Comment by Ethan Zhang (Inactive) [ 03/Feb/22 ]

Just to add that the default should be true (HJ enabled).

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