failed when create an index with partitioned by clause

[Daniel,Wu]

  create table part (a int,b int) PARTITIONED by (c int);

create index part_idx on table part(b,c) AS 
'org.apache.hadoop.hive.ql.index.compact.CompactIndexHandler' WITH DEFERRED 
REBUILD
partitioned by (a) ;

hive> create index part_idx on table part(b,c) AS 
'org.apache.hadoop.hive.ql.index.compact.CompactIndexHandler' WITH DEFERRED 
REBUILD
    > partitioned by (a) ;
FAILED: Parse Error: line 2:0 mismatched input 'partitioned' expecting EOF near 
'REBUILD'

hive>


If I remove the partitioned by (a), then the index can be created. But I need 
to partition it on column. Is that not supported yet or I made some mistake?