you might need to try the following if you have some errors:
update KDD_REVIEW_20060613_blockt
set k.cstm_5_tx=(select max(cstm_5_tx) from x1 where x1.review_id = k.review_id)
/
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Question
Oracle update statement(Block) performance is not good
Hi ,
The below oracle block (To update ) is running long time .Could you suggest me is there any way we can improve the performance?. i appreciate your help on this.
Thank you,
Sumanth
##########################
Declare
cursor gtsprodcode_cursor is select * from x1
Begin
for gtsprodcode_record in gtsprodcode_cursor Loop
update KDD_REVIEW_20060613_blockt
where KDD_REVIEW_20060613_blockt
End Loop;
Commit;
End;
/
##########################
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Answers
Actually select * from x1 is a big querry.Below is the querry.This querry is working fine.Just for 22500 records ,it is taking 3 hrs.I Dont know why?
select ccc.review_id,
(case when ccc.val_ftn=1 and ccc.val_mi=1 then 'CRX'
when ccc.val_ftn=1 and ccc.val_mi=0 and ccc.fta + ccc.ftb + ccc.ftc + ccc.ftd + ccc.ftj + ccc.ftl + ccc.ftu + ccc.ftw + ccc.ftx + ccc.ftz >1 then 'FT-'
when ccc.val_ftn=1 and ccc.val_mi=0 and ccc.fta=1 then 'FTA'
when ccc.val_ftn=1 and ccc.val_mi=0 and ccc.ftb=1 then 'FTB'
when ccc.val_ftn=1 and ccc.val_mi=0 and ccc.ftc=1 then 'FTC'
when ccc.val_ftn=1 and ccc.val_mi=0 and ccc.ftd=1 then 'FTD'
when ccc.val_ftn=1 and ccc.val_mi=0 and ccc.ftj=1 then 'FTJ'
when ccc.val_ftn=1 and ccc.val_mi=0 and ccc.ftl=1 then 'FTL'
when ccc.val_ftn=1 and ccc.val_mi=0 and ccc.ftu=1 then 'FTU'
when ccc.val_ftn=1 and ccc.val_mi=0 and ccc.ftw=1 then 'FTW'
when ccc.val_ftn=1 and ccc.val_mi=0 and ccc.ftx=1 then 'FTX'
when ccc.val_ftn=1 and ccc.val_mi=0 and ccc.ftz=1 then 'FTZ'
when ccc.val_ftn=0 and ccc.val_mi=1 and ccc.cfi + ccc.cgc + ccc.clr + ccc.cwa > 1 then 'C--'
when ccc.val_ftn=0 and ccc.val_mi=1 and ccc.cfi=1 then 'CFI'
when ccc.val_ftn=0 and ccc.val_mi=1 and ccc.cgc=1 then 'CGC'
when ccc.val_ftn=0 and ccc.val_mi=1 and ccc.clr=1 then 'CLR'
when ccc.val_ftn=0 and ccc.val_mi=1 and ccc.cwa=1 then 'CWA' else null end) as cstm_5_tx
from (select bbb.review_id, max(bbb.val_ftn) as val_ftn, max(bbb.val_mi) as val_mi,
max(bbb.fta) as fta, max(bbb.ftb) as ftb, max(bbb.ftc) as ftc, max(bbb.ftd) as ftd,
max(bbb.ftj) as ftj, max(bbb.ftl) as ftl, max(bbb.ftu) as ftu, max(bbb.ftw) as ftw,
max(bbb.ftx) as ftx, max(bbb.ftz) as ftz, max(bbb.cfi) as cfi, max(bbb.cgc) as cgc,
max(bbb.clr) as clr, max(bbb.cwa) as cwa
from (select distinct aaa.*
from (select kr.REVIEW_ID, wt.SRC_SYS_CD, wt.FO_TRXN_SEQ_ID,'WIRE' as typ,
1 as val_ftn, 0 as val_mi,
case when wt.SRC_SYS_CD='FTA' then 1 else 0 end as FTA,
case when wt.SRC_SYS_CD='FTB' then 1 else 0 end as FTB,
case when wt.SRC_SYS_CD='FTC' then 1 else 0 end as FTC,
case when wt.SRC_SYS_CD='FTD' or wt.SRC_SYS_CD='FSB' then 1 else 0 end as FTD,
case when wt.SRC_SYS_CD='FTJ' then 1 else 0 end as FTJ,
case when wt.SRC_SYS_CD='FTL' then 1 else 0 end as FTL,
case when wt.SRC_SYS_CD='FTU' then 1 else 0 end as FTU,
case when wt.SRC_SYS_CD='FTW' then 1 else 0 end as FTW,
case when wt.SRC_SYS_CD='FTX' then 1 else 0 end as FTX,
case when wt.SRC_SYS_CD='FTZ' then 1 else 0 end as FTZ,
case when wt.SRC_SYS_CD='CFI' then 1 else 0 end as CFI,
case when wt.SRC_SYS_CD='CGC' then 1 else 0 end as CGC,
case when wt.SRC_SYS_CD='CLR' then 1 else 0 end as CLR,
case when wt.SRC_SYS_CD='CWA' then 1 else 0 end as CWA
from mantas.kdd_review kr, mantas.kdd_break kb, mantas.kdd_break_mtchs kbm, mantas.kdd_dataset_base kdb,
business.wire_trxn_arc wt
where
--kr.CREAT_TS=(select to_date(VALUE,'mm/dd/yyyy'
--and -- DATE MUST BE UPDATED TO REFLECT TARGET ALERT RUNS
kr.OWNER_ORG='GTS' and kr.REVIEW_ID=kb.PRNT_BREAK
kdb.BASE_TABLE='WIRE_TRXN'
UNION ALL
select kr2.REVIEW_ID, wt2.SRC_SYS_CD, wt2.FO_TRXN_SEQ_ID,'MI ' as typ,
0 as val_ftn, 1 as val_mi,
case when wt2.SRC_SYS_CD='FTA' then 1 else 0 end as FTA,
case when wt2.SRC_SYS_CD='FTB' then 1 else 0 end as FTB,
case when wt2.SRC_SYS_CD='FTC' then 1 else 0 end as FTC,
case when wt2.SRC_SYS_CD='FTD' or wt2.SRC_SYS_CD='FSB' then 1 else 0 end as FTD,
case when wt2.SRC_SYS_CD='FTJ' then 1 else 0 end as FTJ,
case when wt2.SRC_SYS_CD='FTL' then 1 else 0 end as FTL,
case when wt2.SRC_SYS_CD='FTU' then 1 else 0 end as FTU,
case when wt2.SRC_SYS_CD='FTW' then 1 else 0 end as FTW,
case when wt2.SRC_SYS_CD='FTX' then 1 else 0 end as FTX,
case when wt2.SRC_SYS_CD='FTZ' then 1 else 0 end as FTZ,
case when wt2.SRC_SYS_CD='CFI' then 1 else 0 end as CFI,
case when wt2.SRC_SYS_CD='CGC' then 1 else 0 end as CGC,
case when wt2.SRC_SYS_CD='CLR' then 1 else 0 end as CLR,
case when wt2.SRC_SYS_CD='CWA' then 1 else 0 end as CWA
from mantas.kdd_review kr2, mantas.kdd_break kb2, mantas.kdd_break_mtchs kbm2, mantas.kdd_dataset_base kdb2,
business.mi_trxn_arc wt2
where
--kr2.CREAT_TS=(select to_date(VALUE,'mm/dd/yyyy'
-- and -- DATE MUST BE UPDATED TO REFLECT TARGET ALERT RUNS
kr2.OWNER_ORG='GTS' and kr2.REVIEW_ID=kb2.PRNT_BRE
kdb2.BASE_TABLE='MI_TRXN' and kbm2.KEY_ID=wt2.FO_TRXN_SE
) aaa
) bbb
group by bbb.review_id
) ccc
order by 1;
Creating a Materialized view instead of a normal view can boost performance. Also create index on selected columns for the Materialized view.
CREATE MATERIALIZED VIEW x1_MVW REFRESH FAST AS select ccc.review_id,
(case when ccc.val_ftn=1 and ccc.val_mi=1 then 'CRX'
when ccc.val_ftn=1 and ccc.val_mi=0 and ccc.fta .............
create index x1_mvw_idx1 on x1_MVW (review_id);
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by: actonwangPosted on 2006-06-14 at 20:31:39ID: 16908737
you just need to use this to update records, more efficient:
update KDD_REVIEW_20060613_blockt
set k.cstm_5_tx=(select cstm_5_tx from x1 where x1.review_id = k.review_id)
/