function spSyncData(doc) {
    var collection = getContext().getCollection();
    var collectionLink = collection.getSelfLink();
    var response = getContext().getResponse();
    var removeFieldTtl = "ttl";
    if (!doc) throw new Error("Document is undefined or null.");
    if (!doc["id"]) throw new Error("The id is undefined or null.");
    var id = doc["id"];
    tryQueryAndUpdate();
    function tryQueryAndUpdate(continuation) {
        var query = { query: "select * from root r where r.id = @id", parameters: [{ name: "@id", value: id }] };
        var requestOptions = { continuation: continuation };
        var isAccepted = collection.queryDocuments(collectionLink, query, requestOptions, function (err, documents, responseOptions) {
            if (err) throw err;
            if (documents.length > 0) {
                // If the document is found, update it.
                // There is no need to check for a continuation token since we are querying for a single document.
                tryUpdate(documents[0]);
            } else if (responseOptions.continuation) {
                // Else if the query came back empty, but with a continuation token; repeat the query w/ the token.
                // It is highly unlikely for this to happen when performing a query by id; but is included to serve as an example for larger queries.
                tryQueryAndUpdate(responseOptions.continuation);
            } else {
                // Else a document with the given id does not exist..
                var isAdded = collection.createDocument(collectionLink, doc, function (err, addDocument, responseOptions) {
                    if (err) throw err;
                    // If we have successfully added the document - return it in the response body.
                    response.setBody(addDocument);
                });
            }
        });

        // If we hit execution bounds - throw an exception.
        // This is highly unlikely given that this is a query by id; but is included to serve as an example for larger queries.
        if (!isAccepted) {
            throw new Error("The stored procedure timed out.");
        }
    }
    // Updates the supplied document according to the update object passed in to the sproc.
    function tryUpdate(document) {
        var requestOptions = { etag: document._etag };
        var fields, i;
        delete document[removeFieldTtl];
        fields = Object.keys(doc);
        for (i = 0; i < fields.length; i++) {
            document[fields[i]] = doc[fields[i]];
        }
        // Update the document.
        var isAccepted = collection.replaceDocument(document._self, document, requestOptions, function (err, updatedDocument, responseOptions) {
            if (err) throw err;
            // If we have successfully updated the document - return it in the response body.
            response.setBody(updatedDocument);
        });

        // If we hit execution bounds - throw an exception.
        if (!isAccepted) {
            throw new Error("The stored procedure timed out.");
        }
    }
}