I have a local postgres database. I am trying to run a simple comment on command with connection.execute. For example,

import sqlalchemy as sa
db_url = DB_URL
db_engine = sa.create_engine(db_url)
conn = db_engine.connect()

conn.execute('create schema test')
conn.execute('create table test.testing as (select 1 as value)')

conn.execute("comment on table test.testing is 'this is my table'")

This actually does create a table test.testing in my local db, but when I run the following:

select * 
from pg_description
join pg_class
on pg_description.objoid = pg_class.oid
join pg_namespace
on pg_class.relnamespace = pg_namespace.oid
where pg_namespace.nspname = 'test'
and pg_class.relname = 'testing' 

No rows are actually returned.