pg_default 默认表空间

halo0root=# select * from pg_tablespace;
 oid  |  spcname   | spcowner | spcacl | spcoptions 
------+------------+----------+--------+------------
 1663 | pg_default |       10 |        | 
 1664 | pg_global  |       10 |        | 
(2 rows)