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 44-34. pg_tablespace Columns
|spcowner||oid||pg_authid.oid||Owner of the tablespace, usually the user who created it|
|spclocation||text||Location (directory path) of the tablespace|
|spcacl||aclitem||Access privileges; see GRANT and REVOKE for details|
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