ALTER STATISTICS — change the definition of an extended statistics object
ALTER STATISTICSnameOWNER TO {new_owner| CURRENT_ROLE | CURRENT_USER | SESSION_USER } ALTER STATISTICSnameRENAME TOnew_nameALTER STATISTICSnameSET SCHEMAnew_schemaALTER STATISTICSnameSET STATISTICS {new_target| DEFAULT }
   ALTER STATISTICS changes the parameters of an existing
   extended statistics object.  Any parameters not specifically set in the
   ALTER STATISTICS command retain their prior settings.
  
   You must own the statistics object to use ALTER STATISTICS.
   To change a statistics object's schema, you must also
   have CREATE privilege on the new schema.
   To alter the owner, you must be able to SET ROLE to the
   new owning role, and that role must have CREATE
   privilege on the statistics object's schema.
   (These restrictions enforce that altering
   the owner doesn't do anything you couldn't do by dropping and recreating
   the statistics object.  However, a superuser can alter ownership of any
   statistics object anyway.)
  
nameThe name (optionally schema-qualified) of the statistics object to be altered.
new_ownerThe user name of the new owner of the statistics object.
new_nameThe new name for the statistics object.
new_schemaThe new schema for the statistics object.
new_target
        The statistic-gathering target for this statistics object for subsequent
        ANALYZE operations.
        The target can be set in the range 0 to 10000.  Set it to
        DEFAULT to revert to using the system default
        statistics target (default_statistics_target).
        (Setting to a value of -1 is an obsolete way spelling to get the same
        outcome.)
        For more information on the use of statistics by the
        PostgreSQL query planner, refer to
        Section 14.2.
       
   There is no ALTER STATISTICS command in the SQL standard.