How to pass function in sql query of DocumentDB for NodeJS? - sql

Question

Q.1: I want to run one query on DocumentDB with user defined function,
var udf = function(users, userid) {
var s, _i, _len;
for (_i = 0, _len = users.length; _i < _len; _i++) {
s = users[_i];
if (s.userid === userid) {
return true;
}
}
return false;
};
conversationsQuerySpec = {
query: 'SELECT * FROM root r WHERE #fn(r.users, #userid) AND r.id=#id',
parameters: [{
name: '#fn',
value: udf
}, {
name: '#userid',
value: userid
}, {
name: '#id',
value: id
}]
};
But problem is that this query is not running throwing error.
Q.2: I have 1 object in documentDB with array like:
var student = {
name: 'piyush',
classes: [{
level: '1st',
medium: 'spanish'
},{
level: '2nd',
medium: 'german'
}]
}
I want to run query where medium=german, I don't want to pass level=2nd, how can I run this query?

Answer 1

Q1. You have to upload the UDF independently rather than as a parameter. Just upsert it using the appropriate SDK call before running that query.
First to register the UDF using createUserDefinedFunction within the collection with a name like myUserDefinedFunction.
Then you can use it inside the query by name, e.g. SELECT * FROM root r WHERE udf.myUserDefinedFunction(r.users, #userid) AND r.id=#id
Q2. This should work (untested):
SELECT VALUE student FROM student JOIN c in student.classes WHERE c.medium = "german"