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    Type:Investigation 
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    Resolution: Done
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    Priority:Major - P3 
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    None
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    Affects Version/s: None
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    Component/s: None
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    None
Downstream Change Summary
Add an aggregation stage $densify to add documents in a sequence of documents where certain values in a field are missing.
Description of Linked Ticket
Epic Summary
Summary
Provide a way to add missing documents given an order domain, e.g. adding documents for missing days in a collection ordered by time with date granularity.
Motivation
This is a foundational feature in a time series database and will be expected by our customers in our MVP.
Cast of Characters
- Product Owner: Katya Kamenieva
- Project Lead: TBD
- Program Manager: Joe Kanaan
- Drivers Contact: TBD
Documentation
Scope Document
 Technical Design Document
Syntax Document
 Product Description