The driver supports objects with nested objects. When generating the relational view, the driver flattens nested objects to the table of the parent object.

A column with three nested columns takes the following form for a column with three nested objects. You can define one or more nested objects in a column definition.
"<column_name>":{
    "<nested_column1>":"<data_type>",
    "<nested_column2>","<data_type>",
    "<nested_column3>","<data_type>"
   }
column_name
is the name of the column that contains the nested object.
nested_column
specifies the data type mapping for the map key.
data_type
specifies the data type mapping for the corresponding column.
The following example demonstrates defining a column with nested objects: 
"address":{"line1":"varchar(256)", "zip":"integer", "city":"varchar(256)"}