Description of the illustration alter_index

ALTER INDEX [ schema. ] index_name [ index_ilm_clause ]
  { { deallocate_unused_clause
    | allocate_extent_clause
    | shrink_clause
    | parallel_clause
    | physical_attributes_clause
    | logging_clause
    | partial_index_clause
    } ...
  | rebuild_clause
  | PARAMETERS ( 'ODCI_parameters' )
               )
  | COMPILE
  | { ENABLE | DISABLE }
  | UNUSABLE [ ONLINE ] [ { DEFERRED | IMMEDIATE } INVALIDATION ]
  | VISIBLE | INVISIBLE
  | RENAME TO new_name
  | COALESCE [ CLEANUP ] [ ONLY ] [ parallel_clause ]
  | { MONITORING | NOMONITORING } USAGE
  | UPDATE BLOCK REFERENCES
  | alter_index_partitioning
  |  annotations_clause
  }
  ;