您可以在目录。目录是表的集合，其中包含有关正在运行的Postgres实例的元数据。因此，使用SQL进行查询很容易。要查找特定用户拥有的所有表，可以查询 pg_tables 。对于尺寸，您可能必须加入 pg_class 。

You can look up such information in the catalog. The catalog is a collection of tables containing meta data about a running Postgres instance. Therefore it is easy to query with SQL. To find all tables owned by a particular user you can query pg_tables. For sizes you probably have to join pg_class.