[DOCS-14338] Investigate changes in SERVER-54907: Add translation logic for $derivative executor Created: 07/Apr/21  Updated: 13/Nov/23  Resolved: 09/Jun/21

Status: Closed
Project: Documentation
Component/s: manual, Server
Affects Version/s: None
Fix Version/s: 4.9.0, Server_Docs_20231030, Server_Docs_20231106, Server_Docs_20231105, Server_Docs_20231113

Type: Task Priority: Major - P3
Reporter: Backlog - Core Eng Program Management Team Assignee: Jason Price
Resolution: Done Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Issue Links:
Documented
documents SERVER-54907 Add translation logic for $derivative... Closed
Participants:
Days since reply: 2 years, 44 weeks, 1 day ago

 Description   

Description

Downstream Change Summary

($derivative is new in 5.0 as part of the Window Functions project, so this is a breaking change only for internal users.)

We made a small syntax change vs the Syntax doc: $derivative requires an explicit 'window' argument. Other window functions that accept a 'window' default to [unbounded, unbounded], but we thought this might be confusing default for $derivative.

Description of Linked Ticket

SERVER-54233 adds a new executor type for $derivative, but its not currently hooked up to the front end. The two main tasks for this ticket are to (1) register a $derivative parser and parse tree representation (window_function::Expression) and (2) build the new executor when appropriate. Then we should be able to write JS tests for the derivative function as well.

Scope of changes

Impact to Other Docs

MVP (Work and Date)

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


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