Session connection changes for a same db object

[ruxuez]

When running multiple notebooks at the same time using GreenplumPython, the backend pid of the session has changed while the db object id remains the same. I add that there is no session disconnection happend between the changes.

Session of the starting current notebook:

BACKEND SESSION PID:  [RealDictRow([('pg_backend_pid', 11777)])]
DB OBJECT ID:  140420733129040
CREATE FUNCTION "pg_temp"."func_f8e86dfce7934fb98e098e9cc0eb75d6" (date "text") RETURNS "text" AS $$

After running several cells, the session pid has changed, which refers to another notebook's session:

BACKEND SESSION PID:  [RealDictRow([('pg_backend_pid', 11780)])]
DB OBJECT ID:  140420733129040
function pg_temp.func_f8e86dfce7934fb98e098e9cc0eb75d6(text) does not exist