cursor.readConcern() (original) (raw)

cursor.readConcern(level)

Important

mongosh Method

This page documents a mongosh method. This is _not_the documentation for a language-specific driver, such as Node.js.

For MongoDB API drivers, refer to the language-specificMongoDB driver documentation.

Specify a read concern for the db.collection.find()method.

The readConcern() method has the following form:

db.collection.find().readConcern(<level>)

The readConcern() method has the following parameter:

This method is available in deployments hosted in the following environments:

• MongoDB Atlas: The fully managed service for MongoDB deployments in the cloud

Note

This command is supported in all MongoDB Atlas clusters. For information on Atlas support for all commands, seeUnsupported Commands.

• MongoDB Enterprise: The subscription-based, self-managed version of MongoDB
• MongoDB Community: The source-available, free-to-use, and self-managed version of MongoDB

You can use causally consistent sessions to read your own writes, if the writes request acknowledgment.

When specifying linearizable read concern, always use maxTimeMS() in case a majority of data bearing members are unavailable.

db.restaurants.find( { _id: 5 } ).readConcern("linearizable").maxTimeMS(10000)

See also: