[DOCS-12330] Docs for SERVER-38362: Prevent $out stage within $lookup Created: 07/Jan/19  Updated: 13/Nov/23  Resolved: 11/Jan/19

Status: Closed
Project: Documentation
Component/s: manual, Server
Affects Version/s: None
Fix Version/s: 4.1.7, Server_Docs_20231030, Server_Docs_20231106, Server_Docs_20231105, Server_Docs_20231113

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

Issue Links:
Documented
documents SERVER-38362 Prevent $out stage within $lookup Closed
Related
is related to DOCS-12086 Docs for SERVER-35419: Make diskRequi... Closed
Participants:
Days since reply: 5 years, 4 weeks, 5 days ago
Epic Link: DOCS: 4.2 Server/Tools

 Description   

Description

Description:

Document that $out in $lookup is banned. Mention this in release notes for 4.2, as $out in $lookup is allowed in 4.0.

Engineering Ticket Description:

After debating this point during the design of the new $out features, we eventually decided to disallow this combination in any scenario, not just for views as was done in SERVER-35419 + SERVER-34902.

Scope of changes

  • $lookup
  • $out
  • Modify the blurb for views restrictions Actually, it doesn't read well in the extract and is kind of distracting. The blurb already covers it, so will skip for now.
  • Restrictions page Actually, we don't quite do this for specific agg operators (so to prevent confusion as to this is the only limitation, will skip for now)
  • 4.2 compatibility
  • Check downgrade Actually, since we already cover for views and its definition, we should be good since there shouldn't have other persisted features that incorporate lookup.

Impact to Other Docs

MVP (Work and Date)

Resources (Scope or Design Docs, Invision, etc.)



 Comments   
Comment by Githook User [ 11/Jan/19 ]

Author:

{'email': 'kay.kim@mongodb.com', 'name': 'Kay Kim'}

Message: DOCS-12330: $out and $limit restrictions
Branch: master
https://github.com/mongodb/docs/commit/82ee1d436c0bd1eda37ed947c2e539aa24d876ea

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