{ FUNCTIONS
     [ schema. ]function [, [ schema. ]function ]...
| PACKAGES
     [ schema. ]package [, [ schema. ]package ]...
| TYPES
     [ schema. ]type [, [ schema. ]type ]...
| INDEXES
     [ schema. ]index [, [ schema. ]index ]...
| INDEXTYPES
     [ schema. ]indextype [, [ schema. ]indextype ]...
}
{ using_statistics_type
| { default_cost_clause
    [, default_selectivity_clause ]
  | default_selectivity_clause
    [, default_cost_clause ]
  }
}