Query and Write Operation Commands

Note

Atlas Data Federation doesn't include a server-side JavaScript engine. So, it doesn't support commands like mapReduce that require server-side scripting enabled.

`aggregate`

For the aggregate command, the following limitation applies:

Atlas Data Federation supports the explain, cursor, comment, and background options only.
For the comment option, Atlas Data Federation supports only type string.
Atlas Data Federation supports {"background" : <boolean>} option for $out to S3 and Atlas cluster only. The background option is not available for other aggregation pipeline stages. See $out Options for more information.

Tip

Supported Aggregation Pipeline Stages and Operators.

`count`

For the count command, the following limitations apply:

Atlas Data Federation converts count() to an aggregation pipeline internal to Data Federation.
Atlas Data Federation supports only the query option.

`find`

For find command, Atlas Data Federation supports the following options:

batchSize
singleBatch
filter
limit
projection
skip
sort

find() is converted to an aggregation pipeline internal to the federated database instance.

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Diagnostic

Role Management