ExpressionCond::evaluate() only evaluates one or the other branch, depending on the value of the condition. We should have it do the same short-circuiting during optimize(). An expression like {$cond: [true, "$a", "$b"]} can be simplified to "$a", even though "$a" and "$b" are not constants.
- related to
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SERVER-55295 Short circuit $ifNull expression if the condition always evaluates to a constant or null
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- Closed
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- Closed
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