pg_tablespace
   The catalog pg_tablespace stores information
   about the available tablespaces.  Tables can be placed in particular
   tablespaces to aid administration of disk layout.
  
   Unlike most system catalogs, pg_tablespace
   is shared across all databases of a cluster: there is only one
   copy of pg_tablespace per cluster, not
   one per database.
  
Table 52.54. pg_tablespace Columns
| Column Type Description | 
|---|
| 
        Row identifier | 
| 
        Tablespace name | 
| 
        Owner of the tablespace, usually the user who created it | 
| 
        Access privileges; see Section 5.7 for details | 
| 
        Tablespace-level options, as “keyword=value” strings |