![]() If the path of this parameter contains the true value unwind operator will show the output, if the path of this parameter contains the false value then unwind operator will not show the output. PreserveNullEmptyArrays is an optional parameter while using unwind operator in MongoDB. Type of this parameter in MongoDB unwind operator is Boolean. This parameter name does not start with the $ sign. This states that the new name of a field is used to hold the index array for the element. ![]() ![]() Type of this parameter in MongoDB unwind operator is a string. This is an optional parameter while using unwind operator in MongoDB. This is a mandatory parameter while using unwind operator in MongoDB. This is the path field of an array, path is used to specify the path of documents. Unwind operator is used with prefix as $ while using in MongoDB. We have passing the input parameter with unwind operator to display the result. Every output and input documents depend on each other to deconstruct the value. This operator is used to deconstruct the documents in MongoDB. Parameter description syntax of unwind operator in MongoDB Hadoop, Data Science, Statistics & othersīelow is the syntax of unwind operator in MongoDB.
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