The LIST CHANNELS command returns a list of previously created channels that can be used to exchange messages. This command returns only channels created with the CREATE CHANNEL command. You can also subscribe to a table to receive all table-related events (INSERT, UPDATE, and DELETE). The LIST TABLES PUBSUB return a rowset compatible with the rowset returned by the LIST CHANNELS command.
A Rowset with a single chname column that returns all channels created for Pub/Sub.
> LIST CHANNELS ----------| chname | ----------| channel1 | channel2 | channel3 | channel4 | channel5 | channel6 | ----------|