48.45. 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 48-45. pg_tablespace Columns

Name Type References Description
oid oid Row identifier (hidden attribute; must be explicitly selected)
spcname name Tablespace name
spcowner oid pg_authid.oid Owner of the tablespace, usually the user who created it
spcacl aclitem[] Access privileges; see GRANT and REVOKE for details
spcoptions text[] Tablespace-level options, as "keyword=value" strings

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https://www.postgresql.org/docs/9.4/catalog-pg-tablespace.html