[SERVER-72062] Implement SBE support for positional and elemMatch projections Created: 13/Dec/22  Updated: 17/Jan/23

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

Type: Task Priority: Major - P3
Reporter: Drew Paroski Assignee: Backlog - Query Execution
Resolution: Unresolved Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Issue Links:
Depends
depends on SERVER-67061 Remove SBE "applyClassicMatcher" VM i... Closed
Assigned Teams:
Query Execution
Participants:

 Description   

In the past, SBE used to support positional and elemMatch projections. Here is the original ticket where SBE support for these features was implemented: https://jira.mongodb.org/browse/SERVER-52914

However, because of SERVER-66814, we had to disable SBE support for positional and elemMatch projections. Then, as part of de-stage-ifying "sbe_stage_builder_projection.cpp", we removed the disabled SBE implementations for these features.

Re-implementing SBE support for positional and elemMatch projections will require a new approach that works with traverseF().


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