Improve performance when using lots of left join

Question

when i run this query, it is taking *27 minutes* to execute. all keys have index. please help me to improve performance. i am using 11g.
select distinct com.m1co as CO_ID,
fsr.policy_number as POL_ID,
com.M1AGNM as AGNCY_ID,
cr.agent_code as AGT_ID,
P.full_name as agent_name,
ia.status_description as STS_CD,
to_char(ia.bound_date, 'MM/DD/YYYY') as POL_INFC_DT,
(fchgmm||'/'||fchgdd||'/'||fchgyy) as PAY_UP_DT ,
(mcpdtm||'/'||mcpdtd||'/'||mcpdty) as pay_to_dt,
(fexpmm||'/'||fexpdd||'/'||fexpyy) as MATURE_DT,
ia.BILLING_FREQUENCY as PAY_MODE_CD,
casc.MCPYCD as PAY_METHOD_CD,
casc.MCPRMM as MODAL_PREM_AMT,
casc.MCCRCD as POL_CUR,
casc.MCNOPT as NFO_CD,
cas.FINSTP as LINE_OF_BUSS,
(MCPDTM||'/'||MCPDTD||'/'||MCPDTY) as BILL_TO_DT,
com.M1LOCA as COLL_OFF,
to_char(ia.bound_date, 'MM/DD/YYYY') as DELIVERY_DT,
P.FULL_NAME as Serv_AGENT_NAME,
casm.MWAGTN as SERV_AGT_CD,
casc.MCNOPT as NFO_RULE,
ia.STATUS_DESCRIPTION as POL_CSTAT_REASN_CD,
SUBSTR(datesplit5(datesub),1,10) as APP_RECV_DT,
to_char(ia.bound_date, 'MM/DD/YYYY') as ISSUE_DT,
ia.SUM_ASSURED as CVG_FACE_AMT,
p.IDENTITY_CARD_NUMBER as INSRD_CLI_CD
FROM financial_services_role fsr
left join channel_role cr on fsr.role_player_id=cr.role_player_id
left join person p on (fsr.role_player_id=p.role_player_id and FSR.TYPE_DESCRIPTION IN ('AG','AGT'))
left join ext_lsp_comagtm1 com on cr.agent_code=com.m1agno
left join individual_agreement ia on fsr.policy_number =
DECODE(ia.Business_Key_Contract_Number, NULL, ia.Business_Key_Policy_Number,ia.Business_Key_Contract_Number)
left join EXT_LSP_CASCNTRM casc on (fsr.policy_number = casc.MCCNTR)
left join ext_lsp_casbene cas on (fsr.policy_number = cas.fpolno and fbrcd = 0 )
left join ext_lsp_casmwagt casm on (fsr.policy_number = casm.mwpoln and com.m1agnm = 'TAN')
left join cdmtgt.EXT_LA_PTRNPF on (chdrnum = fsr.policy_number and
BATCTRCDE = 'T600')
WHERE com.m1co = 'IL';
Thank you
Edited by: 1000228 on Jun 5, 2013 10:36 AM

Answer 1

HOW To Make TUNING request
SQL and PL/SQL FAQ
SELECT DISTINCT com.m1co                             AS CO_ID,
                fsr.policy_number                    AS POL_ID,
                com.m1agnm                           AS AGNCY_ID,
                cr.agent_code                        AS AGT_ID,
                ' '                                  AS AGNCY_ID_2,
                ' '                                  AS AGT_ID_2,
                ' '                                  AS AGT_ID_2_NAME,
                P.full_name                          AS agent_name,
                ia.status_description                AS STS_CD,
                To_char(ia.bound_date, 'MM/DD/YYYY') AS POL_INFC_DT,
                ( fchgmm
                  ||'/'
                  ||fchgdd
                  ||'/'
                  ||fchgyy )                         AS PAY_UP_DT,
                ( mcpdtm
                  ||'/'
                  ||mcpdtd
                  ||'/'
                  ||mcpdty )                         AS pay_to_dt,
                ( fexpmm
                  ||'/'
                  ||fexpdd
                  ||'/'
                  ||fexpyy )                         AS MATURE_DT,
                ia.billing_frequency                 AS PAY_MODE_CD,
                casc.mcpycd                          AS PAY_METHOD_CD,
                casc.mcprmm                          AS MODAL_PREM_AMT,
                casc.mccrcd                          AS POL_CUR,
                casc.mcnopt                          AS NFO_CD,
                cas.finstp                           AS LINE_OF_BUSS,
                ' '                                  AS REGLR_OR_SCHEDL_TOPUP,
                ' '                                  AS POLICY_LAPSED_DT,
                ( mcpdtm
                  ||'/'
                  ||mcpdtd
                  ||'/'
                  ||mcpdty )                         AS BILL_TO_DT,
                com.m1loca                           AS COLL_OFF,
                To_char(ia.bound_date, 'MM/DD/YYYY') AS DELIVERY_DT,
                P.full_name                          AS Serv_AGENT_NAME,
                casm.mwagtn                          AS SERV_AGT_CD,
                casc.mcnopt                          AS NFO_RULE,
                ia.status_description                AS POL_CSTAT_REASN_CD,
                Substr(Datesplit5(datesub), 1, 10)   AS APP_RECV_DT,
                To_char(ia.bound_date, 'MM/DD/YYYY') AS ISSUE_DT,
                ia.sum_assured                       AS CVG_FACE_AMT,
                '0'                                  AS BASE_CVG_NUM,
                p.identity_card_number               AS INSRD_CLI_CD
FROM   financial_services_role fsr
       left join channel_role cr
              ON fsr.role_player_id = cr.role_player_id
       left join person p
              ON ( fsr.role_player_id = p.role_player_id
                   AND FSR.type_description IN ( 'AG', 'AGT' ) )
       left join ext_lsp_comagtm1 com
              ON cr.agent_code = com.m1agno
       left join individual_agreement ia
              ON fsr.policy_number = Decode(ia.business_key_contract_number,
                                     NULL,
       ia.business_key_policy_number,
                                     ia.business_key_contract_number)
       left join ext_lsp_cascntrm casc
              ON ( fsr.policy_number = casc.mccntr )
       left join ext_lsp_casbene cas
              ON ( fsr.policy_number = cas.fpolno
                   AND fbrcd = 0 )
       left join ext_lsp_casmwagt casm
              ON ( fsr.policy_number = casm.mwpoln
                   AND com.m1agnm = 'TAN' )
       left join cdmtgt.ext_la_ptrnpf
              ON ( chdrnum = fsr.policy_number
                   AND batctrcde = 'T600' )
WHERE  com.m1co = 'IL';