The image shows a DBMS_PIPE Persistent Messaging Pipe basic workflow. There are three boxes. One the left: SEND_MESSAGE in Autonomous AI Database 1, with an arrow to the center box Cloud Pipe that contains Messages in Object Storage, and an arrow from the center to the right RECEIVE_MESSAGE area, on Autonomous AI Database 2.

On the left, Send Message includes the Session buffer, and the PACK_MESSAGE procedure (on Autonomous AI Database 1)

On the right, RECEIVE_MESSAGE includes Session_Buffer with UNPACK_MESSAGE (On Autonomous AI Database 2).