I'm working with RisingWave and trying to create a table that ingests data from a Kinesis stream. The data is in nested JSON format, and I want to set a primary key for the table using a field from the nested JSON. I've managed to create a table and access the fields using the STRUCT type, but I'm not sure how to define a primary key based on a field within the nested JSON. Here's an example of my table creation statement:

CREATE TABLE IF NOT EXISTS test (
    data STRUCT<
        "cob_dt" DATE,
        ...
    >,
)
WITH (
   connector='kinesis',
   stream='dev-dwh-rockset-ods-bpm_data_entry',
   aws.region='ap-southeast-1',
   aws.credentials.access_key_id='xxx',
   aws.credentials.secret_access_key='yyy'
)  
ROW FORMAT JSON;

I want to set the primary key to (data).id. How can I achieve this?