PostgreSQL里列注释在哪儿

comment on column user.userid is 'The user ID';

comment on table user is 'Our session logs';

select description from pg_description

join pg_class on pg_description.objoid = pg_class.oid

where relname = 'user'

select description from pg_description

join pg_class on pg_description.objoid = pg_class.oid

join pg_namespace on pg_class.relnamespace = pg_namespace.oid

where relname = '<table name>' and nspname='<schema name>'