alter_cluster_spec

alter_cluster_spec 
      ::= 
      ( "pctused" n ) | ( "pctfree" n ) 
      | ( "size" n [ "k" | "m" ] ) 
      | ( "initrans" n ) | ( "maxtrans" n ) 
      | ( "storage" "(" storage_spec { storage_spec } ")" ) 
      | ( "allocate" "extent" { allocate_spec } ) 

This rule is called by

alter_cluster