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Type:
Improvement
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Resolution: Done
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Priority:
Major - P3
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Affects Version/s: None
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Component/s: Aggregation Framework
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Labels:None
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Fully Compatible
Currently we treat numbers added or subtracted to dates as whole days (24*60*60*1000 millis). I think we should treat them as milliseconds instead. This way adding 30 minutes looks like {$add:['$date', 30*60*1000]} rather than {$add:['$date', 30.0/24/60]} or {$add:['$date', 1.0/24/2]}
Also currently subtracting two dates yields a Date-typed result when the result should probably be a NumberLong of the number of milliseconds between the dates. Currently it would return a result around 1970-01-01 for dates that are near each other.
Expected results
Date - Date : NumberLong(Milliseconds between times)
Num - Date : Error
Date - Num : Date(original - Num as milliseconds)
Date + Date : Error (current behavior)
Num + Date : Date(with num treated as millis)
Date + Num : Same as above.
- is depended on by
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- Closed
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- is duplicated by
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SERVER-6547 $subtract in aggregation framwork with 2 dates should give number of milliseconds between them
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- Closed
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- Closed
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- is related to
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- Closed
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