ALTER TABLESPACE 7 SQL - Language Statements ALTER TABLESPACE change the definition of a tablespace ALTER TABLESPACE ALTER TABLESPACE name RENAME TO new_name ALTER TABLESPACE name OWNER TO new_owner ALTER TABLESPACE name SET ( tablespace_option = value [, ... ] ) ALTER TABLESPACE name RESET ( tablespace_option [, ... ] ) ALTER TABLESPACE changes the definition of a tablespace. You must own the tablespace to use ALTER TABLESPACE. To alter the owner, you must also be a direct or indirect member of the new owning role. (Note that superusers have these privileges automatically.) name The name of an existing tablespace. new_name The new name of the tablespace. The new name cannot begin with pg_, as such names are reserved for system tablespaces. new_owner The new owner of the tablespace. tablespace_parameter A tablespace parameter to be set or reset. Currently, the only available parameters are seq_page_cost and random_page_cost. Setting either value for a particular tablespace will override the planner's usual estimate of the cost of reading pages from tables in that tablespace, as established by the configuration parameters of the same name (see , ). This may be useful if one tablespace is located on a disk which is faster or slower than the remainder of the I/O subsystem. Rename tablespace index_space to fast_raid: ALTER TABLESPACE index_space RENAME TO fast_raid; Change the owner of tablespace index_space: ALTER TABLESPACE index_space OWNER TO mary; There is no ALTER TABLESPACE statement in the SQL standard.