How could I write aggregation without exceeds maximum document size?

Question

I got exceeds maximum document size problem exception by the query as follows,

pipe = [
    {\"$match\": { \"birthday\":{\"$gte\":datetime.datet         


        

Answer 1

Use following snippet

db.patients.runCommand('aggregate', 
        {pipeline: [
    {"$project": {"birthday":1, "id":1}},
    {"$match": { "birthday":{"$gte":datetime.datetime(1987, 1, 1, 0, 0)} }}
], 
        allowDiskUse: true})

here allowDiskUse will help to find out exceed 16 MB data