What's wrong with this query

Hey list, Can anyone tell me what's wrong with this query?

many thanks,

select /*+ INDEX(b)*/ distinct d.batch_number
, d.document_number
, d.entry_user_id
, d.document_type_id
, d.document_processed_date
, b.batch_media_id, d.return_Method_Id
from submitter_batch b , document d
, ucc_master_amendment m

where d.batch_number = b.batch_number

   and d.document_number = m.document_number
   and d.imaged = 0
   and b.batch_media_id = 4
   and d.document_status_id = 4




      Submitter_batch -     97853 rows
      Document        -   8043272 rows (fk_d_batchnumber index on
batch_number)
      Ucc_master_adment   -    0 rows  (pk_uma_dn index on document_number)

Here is the explain plan:

explain plan                expected rows               object name    
____________________________________________________________________ 

select statement           164662478 
   sort (unique)                 164662478
   nested loops                 164662478
     nested loops                     2008079
       table access(full)                  46193              submitted
batch
          table access(by idx)          2008079              document
               index(range scan)              2008079
fk_d_batchnumber     non-unique
                 index(unique scan)                     82
pk_uma_dn             unique

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