51.55. 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 51.55. 
    
     pg_tablespace
    
    Columns
   
  
| Name | Type | References | Description | 
|---|---|---|---|
| 
        oid
        | 
        oid
        | Row identifier | |
| 
        spcname
        | 
        name
        | Tablespace name | |
| 
        spcowner
        | 
        oid
        | 
        
          | Owner of the tablespace, usually the user who created it | 
| 
        spcacl
        | 
        aclitem[]
        | Access privileges; see Section 5.7 for details | |
| 
        spcoptions
        | 
        text[]
        | Tablespace-level options, as " keyword=value " strings |