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    Type:
Task
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    Resolution: Fixed
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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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        Query 2018-04-09, Query 2018-05-07, Query 2018-05-21, Query 2018-06-04, Query 2018-06-18
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        None
 
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- Implement a user-facing expression language that consists only of:
	
- Constant expressions.
 - Arithmetic.
 - Comparisons.
 - Field path expressions.
 
 - Do not yet add support for variables, including system variables like ROOT.
 
- is depended on by
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SERVER-84890 Implement $expr for MatchExpr in mql-model
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 - Closed
 
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