Improving the performance of this query

Question

Hi, Do you see any change we could do on this to improve its performance, pls, I appreciate you taking few minutes to help with analysing and tuining it
select hoc.hoc_id,
hoc.mstr_key_id,
address.DISP_NME,
blck.st_blck_id,
blck.mstr_key_id as blck_mstr_key,
bldg.BLDG_ID,
hoc.BLDG_KEY_ID,
address.OCPD_IND,
address.TP_TYPE_CDE,
'' as cmbcNumber,
'' as tpSiteNumber,
case
when address.cmbc_id is not null then amsowner.ams_038_direct_connect.GetMobilierForCMB(address.cmbc_id)
when address.lbc_id is not null and address.cmbc_id is null then amsowner.ams_038_direct_connect.GetMobilierForLBC(address.lbc_id)
END as Mobilier,
choice.cnsmr_chce_ind,
hoc.SRT_IND,
hoc.DLVRY_IND,
case valRES_STAT_CDE
when 123444 then hoc.cse_sprtn_wdth
when 123555 then hoc_pend.cse_sprtn_wdth
when 123666 then hoc_pend.cse_sprtn_wdth
end as cse_sprtn_wdth,
case valRES_STAT_CDE
when 123444 then hoc.admail_color_id
when 123555 then hoc.admail_color_id
when 123666 then hoc_pend.admail_color_id
end as admail_color_id,
case valRES_STAT_CDE
when 123444 then hoc.tieout
when 123555 then hoc_pend.tieout
when 123666 then hoc_pend.tieout
end as tieout,
hoc.callr_Ind,
hoc.PCKUP_ind,
case
when hldout.hld_out_id > 0 then 33
else 34
end as HLDOUT_IND,
case valRES_STAT_CDE
when 123444 then hoc.BREAKER_CARD_NUM
when 123555 then hoc_pend.BREAKER_CARD_NUM
when 123666 then hoc_pend.BREAKER_CARD_NUM
end as BREAKER_CARD_IND,
Case
when valRES_STAT_CDE = 123444 and hoc.MP_ID is not null and hoc.MP_ID <> 0 then 33
when valRES_STAT_CDE = 123555 and hoc_pend.MP_ID is not null and hoc_pend.MP_ID <> 0 then 33
when valRES_STAT_CDE = 123666 and hoc_pend.MP_ID is not null and hoc_pend.MP_ID <> 0 then 33
else 34 END as MP_IND,
case
when valRES_STAT_CDE = 123444 then hoc.LCRMS_SEQ_NUM
when valRES_STAT_CDE = 123555 then hoc_pend.DEL_SEQ
when valRES_STAT_CDE = 123666 then hoc_pend.DEL_SEQ
END as DEL_SEQ,
case
when (hoc_type_cde = 154 and hoc.MP_ID is not null ) then (NVL(mp.SLCLRES_RATE , 0)+ NVL(mp.OSSDRES_RATE,0))
when (hoc_type_cde = 154 and hoc.MP_ID is null ) then (NVL(asmt.SLCLRES_RATE , 0)+ NVL(asmt.OSSDRES_RATE,0))
when (hoc_type_cde = 156 and hoc.MP_ID is not null )then (NVL(mp.SLCLCOM_RATE,0) + NVL(mp.OSSDCOM_RATE,0))
when (hoc_type_cde = 156 and hoc.MP_ID is null ) then (NVL(asmt.SLCLCOM_RATE,0) + NVL(asmt.OSSDCOM_RATE,0))
else 0
END As AvgMail,
Case
when valRES_STAT_CDE = 123444 then hoc.drct_ind
when valRES_STAT_CDE = 123555 then hoc_pend.drct_ind
when valRES_STAT_CDE = 123666 then hoc_pend.drct_ind
END as drct_ind,
Case
when pc.ldu_type_cde in (492, 564, 565, 566, 567 ) then 33
else 34
end as lvr_ind,
hoc.A12_CARD_IND,
hoc.DNC_CARD_IND,
hoc.CARD_IND,
hoc.FRCE_CARD_IND,
hoc.EXTRA_CARD_NBR,
hoc.TTL_HOC_CNT,
--(select BSNS_NME_EN from occupant where occupant.ADDR_MAIL_ID = address.addr_id and occupant.prmry_ind = 33 and rownum <= 1 )as PRIMARY_BUS_NME_EN,
--(select BSNS_NME_FR from occupant where occupant.ADDR_MAIL_ID = address.addr_id and occupant.prmry_ind = 33 and rownum <= 1 )as PRIMARY_BUS_NME_FR,
blck.blck_seq,
address.ADDR_NUM,
address.ADDR_SFX_CDE,
address.ADDR_STE_NUM,
hoc.HOC_TYPE_CDE,
hoc.CSE_SPRTN_GRP_ID,
pc.pc_id As pc_id,
pc.disp_nme as pc_disp_nme,
hoc.bag_ind,
hoc.CASETAG,
occupant.BSNS_NME_EN as PRIMARY_BUS_NME_EN , occupant.BSNS_NME_FR as PRIMARY_BUS_NME_FR
from amsowner.AMS_038_HOC hoc
left join amsowner.ams_038_hoc_pndng hoc_pend
on hoc.MSTR_KEY_ID = hoc_pend.MSTR_KEY_ID
inner join amsowner.AMS_038_ST_BlCK blck
on hoc.st_blck_key_id = blck.mstr_key_id
inner join amsowner.postal_code pc
on blck.pc_id = pc.pc_id
left join amsowner.AMS_038_bldg bldg
on hoc.BLDG_KEY_ID = bldg.MSTR_KEY_ID
inner join amsowner.address address
on address.addr_id = hoc.addr_mail_id
inner join amsowner.addr_lctn_to_mail locToMail
on locToMail.addr_mail_id = address.addr_id
inner join amsowner.addr_chce choice
on choice.addr_id = locToMail.addr_lctn_id
left join occupant on (occupant.ADDR_MAIL_ID = address.addr_id and occupant.prmry_ind = 33)
left join amsowner.ams_038_hld_out hldout
on (hldout.mstr_key_id = hoc.mstr_key_id and hldout.end_dte is null)
left join amsowner.ams_038_dm dm
on dm.dm_id = blck.dm_id
left join ams_038_assmt asmt
on blck.pc_id = asmt.pc_id and asmt.dpt_cde_nme = valDpt_cde_nme and ((asmt.case_type_cde = 1220 and dm.a62_cse_ind = 33) or (asmt.case_type_cde = 1219 and dm.a62_cse_ind = 34))
left join ams_038_mail_prfl mp
on hoc.mp_id = mp.mp_id and ((mp.case_type_cde = 1220 and dm.a62_cse_ind = 33) or (mp.case_type_cde = 1219 and dm.a62_cse_ind = 34))
where hoc.mstr_key_id = valMSTR_KEY_ID and blck.DPT_CDE_NME = valDpt_cde_nme and hoc.DPT_CDE_NME = valDpt_cde_nme and blck.RSTRCTR_STAT_CDE = restCode;
Thanks a lot :)

Answer 1

Hi and welcome to the forum.
I appreciate you taking few minutes to help with analysing and tuining itUnfortunatly it's not that simple.
We would need some more input here, like:
- database version
- optimizer settings
- execution plans
-etc..
Tuning is a complex matter, since many parameters come into play here.
If you want some useful responses then see:
[When your query takes too long...|http://forums.oracle.com/forums/thread.jspa?messageID=3299435]
[How to post a SQLStatement tuning request|http://forums.oracle.com/forums/thread.jspa?threadID=863295&tstart=0]
to understand what information would also be very useful to us (and, if needed, have your DBA participating in this as well).