O'Reilly logo

MongoDB Cookbook - Second Edition by Amol Nayak, Cyrus Dasadia

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Creating and understanding sparse indexes

Schemaless design is one of the fundamental features of Mongo. This allows documents in a collection to have disparate fields, with some fields present in some documents and absent in others. In other words, these fields might be sparse, which might have already given you a clue on what sparse indexes are. In this recipe, we will create some random test data and see how sparse indexes behave against a normal index. We shall see the advantages and one major pitfall of using a sparse index.

Getting ready

For this recipe, we need to create a collection called sparseTest. We will require a server to be up and running. Refer to the Installing single node MongoDB recipe from Chapter 1, Installing and Starting ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required