MV does not create

Hi Master,

I wanted to create m.v. (method to fast refresh every 30 min.) But I am not able to create. It is through errors. All tables have primary keys,

Please advise... !!

SELECT b . CONNECTION_ID_V , d . tariff_id_n BASE_TARIFF_ID_N , d . START_DATE_DT

DE CONNECTIONS b ,

(select PAYER_ID_0_N ACCOUNT_ID_N START_DATE_DT )

de (select PAYER_ID_0_N ACCOUNT_ID_N START_DATE_DT )

ROW_NUMBER () on (partition of PAYER_ID_0_N ACCOUNT_ID_N )

order by START_DATE_DT / / desc

) rn

de CONNECTION_ACCOUNTS

)

rn = 1

) c,

(select PAYER_ID_N TARIFF_ID_N START_DATE_DT )

de (select has. ) PAYER_ID_N ,A. TARIFF_ID_N ,A. START_DATE_DT ,

ROW_NUMBER () on (partition by has. ) PAYER_ID_N

order by A. START_DATE_DT / / desc

) rn

de PAYER_TARIFFS A, TARIFF_MASTER B

A. TARIFF_ID_N = B . TARIFF_ID_N

ET A. STATUS_N = 1

ET B . TARIFF_TYPE_V = 'B'

)

rn = 1

) d,

TARIFF_MASTER e

b . ACCOUNT_ID_N = c . ACCOUNT_ID_N

ET B . STATUS_N <> 5

ET C . PAYER_ID_0_N = D . PAYER_ID_N

ET nvl(B. EVENT_REQUEST_NO_N , 1 )=1

ET d . TARIFF_ID_N = e. TARIFF_ID_N

ET E. TARIFF_TYPE_V = 'B'

ET E. STATUS_N = 1    

GROUP BY b . CONNECTION_ID_V , d . tariff_id_n , d . START_DATE_DT ;


Concerning

AR

What happens when you try to create it? If it is not quickly updatable, you can use dbms_mview.explain_mview (https://docs.oracle.com/database/121/ARPLS/d_mview.htm#ARPLS67191 ) to tell you the reasons.

How long does the original query takes to run? You may find that it is fast enough for the refresh to occur:

create materialized view as_mview_01
refresh force on demand
as
SELECT b.CONNECTION_ID_V,d.tariff_id_n BASE_TARIFF_ID_N,d.START_DATE_DT
  FROM CONNECTIONS b,
(select PAYER_ID_0_N,ACCOUNT_ID_N,START_DATE_DT
from (select PAYER_ID_0_N,ACCOUNT_ID_N,START_DATE_DT,
row_number() over (partition by PAYER_ID_0_N,ACCOUNT_ID_N
order by START_DATE_DT desc
) rn
from CONNECTION_ACCOUNTS
)
where rn = 1
) c,
(select PAYER_ID_N,TARIFF_ID_N,START_DATE_DT
from (select A.PAYER_ID_N,A.TARIFF_ID_N,A.START_DATE_DT,
row_number() over (partition by A.PAYER_ID_N
order by A.START_DATE_DT desc
) rn
from PAYER_TARIFFS A,TARIFF_MASTER B
where A.TARIFF_ID_N=B.TARIFF_ID_N
AND A.STATUS_N = 1
                  AND B.TARIFF_TYPE_V='B'
)
where rn = 1
) d,
TARIFF_MASTER e
WHERE b.ACCOUNT_ID_N = c.ACCOUNT_ID_N
AND B.STATUS_N <> 5
AND C.PAYER_ID_0_N = D.PAYER_ID_N
AND nvl(B.EVENT_REQUEST_NO_N,1)=1
AND d.TARIFF_ID_N = e.TARIFF_ID_N
AND E.TARIFF_TYPE_V = 'B'
AND E.STATUS_N=1
GROUP BY b.CONNECTION_ID_V,d.tariff_id_n,d.START_DATE_DT
/

Then set up a scheduler position to refresh it every 30 minutes using dbms_mview.refresh. If the mview must be fully refreshed, then you can just make sure the query behind it runs fast enough to enable the refresh to be fast enough.

Tags: Database

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