Performance problem while creating table at runtim

Question

I have pl/sql block like
Begin
Exceute immediate 'drop table x '
Execute immediate 'create table x as select .... stament (complex select by joining 7-8 tables);
Execute immediate ('create index ind1 on table x'); -- i am not writing the full syntax
End;
The select statement used in create table is fetching 10 millions of rows (approx).
The above pl/sql block is taking 30-45 minutes.
Without going in depth of query used in select (as i have to explain the functionality otherwise),
Could any one please suggest to create a table in fatset way like nolooging or seperate tablespace with bigger block size or any change in any DB parameter etc.
The db server is having excelent hardware configuration 32GB ram , multi CPU (16 CPUs) , Huge hardisk.
Thanks

Answer 1

CREATE OR REPLACE VIEW VW_CUST_ACCT_BUS_REQ AS
SELECT FC.V_CUST_NUMBER,
FC.V_ACCT_NUMBER,
FC.V_ACCT_CUST_ROLE_CODE
from Fct_Acct_Cust_Roles FC --current schema table
join dim_jurisdiction DC on DC.V_JURISDICTION_CODE = FC.V_SRC_CNTRY_CODE
JOIN VW_APPLN_PARAMS APP ON APP.V_PARAM_CATEGORY = 'KYC'
AND APP.V_PARAM_IDENTIFIER =
'KYC_PROCESSING_DATE'
AND APP.N_CNTRY_KEY = DC.N_JURISDICTION_KEY
AND FC.FIC_MIS_DATE = APP.d_Param_Date
UNION
SELECT BUS_CUST_ACCT.CUST_INTRL_ID,
BUS_CUST_ACCT.ACCT_INTRL_ID,
BUS_CUST_ACCT.CUST_ACCT_ROLE_CD
FROM BUS_CUST_ACCT --another schema's table containing rows in millions.
--Can you tell me any other method to acheive the above select
CREATE TABLE vw_kyc_dr_ip as
SELECT FCU.V_SRC_CNTRY_CODE JRSDCN_CD,
FCU.V_CUST_NUMBER v_cust_id,
FACRS.V_CUST_NUMBER v_ip_cust_id,
ROLS.F_CONTROLLING_ROLE f_cntrl_role
FROM VW_CUST_BUS_REQ FCU -- This is another Mview it contains data approx 50,000
JOIN VW_CUST_ACCT_BUS_REQ FACR/* see above view definition, contains rows in millions */ ON FCU.V_CUST_NUMBER = FACR.V_CUST_NUMBER
JOIN VW_CUST_ACCT_BUS_REQ FACRS ON FACR.V_ACCT_NUMBER = FACRS.V_ACCT_NUMBER
JOIN DIM_ACCT_CUST_ROLE_TYPE ROLS ON ROLS.V_ACCT_CUST_ROLE_CODE =FACRS.V_ACCT_CUST_ROLE_CODE
UNION
(SELECT FCU.V_SRC_CNTRY_CODE JRSDCN_CD,
FCU.V_CUST_NUMBER v_cust_id,
FCR.V_RELATED_CUST_NUMBER v_ip_cust_id,
'N' f_cntrl_role
FROM VW_CUST_BUS_REQ FCU
JOIN VW_CUST_CUST_BUS_REQ FCR ON FCU.V_CUST_NUMBER =
FCR.V_CUST_NUMBER
JOIN VW_APPLN_PARAMS P ON P.V_PARAM_IDENTIFIER = 'KYC_PROCESSING_DATE'
AND P.V_PARAM_CATEGORY = 'KYC'
AND FCR.D_RELATIONSHIP_EXPIRY_DATE >=
P.D_PARAM_DATE
JOIN DIM_JURISDICTION ON DIM_JURISDICTION.N_JURISDICTION_KEY =
P.N_CNTRY_KEY
AND DIM_JURISDICTION.V_JURISDICTION_CODE =
FCU.V_SRC_CNTRY_CODE
MINUS
SELECT DISTINCT FCU.V_SRC_CNTRY_CODE JRSDCN_CD,
FCU.V_CUST_NUMBER v_cust_id,
FACRS.V_CUST_NUMBER v_ip_cust_id,
'N'
FROM VW_CUST_BUS_REQ FCU
JOIN VW_CUST_ACCT_BUS_REQ FACR ON FCU.V_CUST_NUMBER =
FACR.V_CUST_NUMBER
JOIN VW_CUST_ACCT_BUS_REQ FACRS ON FACR.V_ACCT_NUMBER =
FACRS.V_ACCT_NUMBER
JOIN DIM_ACCT_CUST_ROLE_TYPE ROLS ON ROLS.V_ACCT_CUST_ROLE_CODE =
FACRS.V_ACCT_CUST_ROLE_CODE
AND ROLS.F_CONTROLLING_ROLE = 'Y'
UNION
(SELECT FCU.V_SRC_CNTRY_CODE JRSDCN_CD,
FCU.V_CUST_NUMBER v_cust_id,
FCR.V_CUST_NUMBER v_ip_cust_id,
'N' f_cntrl_role
FROM VW_CUST_BUS_REQ FCU
JOIN VW_CUST_CUST_BUS_REQ FCR ON FCU.V_CUST_NUMBER =
FCR.V_RELATED_CUST_NUMBER
JOIN VW_APPLN_PARAMS P ON P.V_PARAM_IDENTIFIER = 'KYC_PROCESSING_DATE'
AND P.V_PARAM_CATEGORY = 'KYC'
AND FCR.D_RELATIONSHIP_EXPIRY_DATE >=
P.D_PARAM_DATE
JOIN DIM_JURISDICTION ON DIM_JURISDICTION.V_JURISDICTION_CODE =
FCU.V_SRC_CNTRY_CODE
AND DIM_JURISDICTION.N_JURISDICTION_KEY =
P.N_CNTRY_KEY
MINUS
SELECT DISTINCT FCU.V_SRC_CNTRY_CODE JRSDCN_CD,
FCU.V_CUST_NUMBER v_cust_id,
FACRS.V_CUST_NUMBER v_ip_cust_id,
'N'
FROM VW_CUST_BUS_REQ FCU
JOIN VW_CUST_ACCT_BUS_REQ FACR ON FCU.V_CUST_NUMBER =
FACR.V_CUST_NUMBER
JOIN VW_CUST_ACCT_BUS_REQ FACRS ON FACR.V_ACCT_NUMBER =
FACRS.V_ACCT_NUMBER
JOIN DIM_ACCT_CUST_ROLE_TYPE ROLS ON ROLS.V_ACCT_CUST_ROLE_CODE =
FACRS.V_ACCT_CUST_ROLE_CODE
AND ROLS.F_CONTROLLING_ROLE = 'Y'
Kindlt advice me on technical side , i think it is difficult to make you understand functionality.