52.58. 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 52.58. 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  |