Get subscription relationship from Cassandra

Create the “mqtt” tablespace:

Create the mqtt_sub table:

TIP

The subscription relationship table structure cannot be modified. Please use the above SQL statement to create

Create rules:

Open EMQX Dashboard (opens new window) and select the “Rules” tab on the left.

Then fill in the rule SQL:

Related actions:

Fill in the action parameters:

The action of “Get subscription list from Cassandra” requires one parameter:

1). Associated resources. The resource drop-down box is empty now, and you can click “New” in the upper right corner to create a Cassandra resource:

The “Create Resource” dialog box pops up

Fill in the resource configuration:

Fill in the real Cassandra server address and the values corresponding to other configurations, and then click the “Test Connection” button to ensure that the connection test is successful.

Return to the response action interface and click “OK”.

Return to the rule creation interface and click “Create”.

The rule has been created, and you can insert a subscription relationship into Cassandra through “cqlsh”:

Log in to the device whose clientid is test via Dashboard: