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null coalescence operator with inexistant param #131

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4 changes: 3 additions & 1 deletion EvaluableExpression.go
Original file line number Diff line number Diff line change
Expand Up @@ -171,7 +171,9 @@ func (this EvaluableExpression) evaluateStage(stage *evaluationStage, parameters
if stage.leftStage != nil {
left, err = this.evaluateStage(stage.leftStage, parameters)
if err != nil {
return nil, err
if stage.symbol!=COALESCE { // Doesn't raise error if the parameter doesn't exists with '??' operator
return nil, err
}
}
}

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