Appian compatible with MongoDB

It's not compatible in the sense that it is not supported. But, you can create a connector for mongoDB. This will require that you create a custom plugin. The plugin should be able to read and write data to/from MongoDB. The interface to the connector should be similar to Write to Datastore and query entity. And you will also need utilities to convert between structured data (CDTs in Appian) to unstructured data (arbitrary Json with arbitrary number of attributes in it).. you will need the database driver for mongoDB with the Java bindings.

It's not compatible in the sense that it is not supported. But, you can create a connector for mongoDB. This will require that you create a custom plugin. The plugin should be able to read and write data to/from MongoDB. The interface to the connector should be similar to Write to Datastore and query entity. And you will also need utilities to convert between structured data (CDTs in Appian) to unstructured data (arbitrary Json with arbitrary number of attributes in it).. you will need the database driver for mongoDB with the Java bindings.