Dear Team,
I am using DB2 v10.5 and trying to load huge data using MERGE option ( 10-12 Million) using below query. Basically it loads data from staging to target . Staging table schemaname.Customer_Staging has 12 Million records . Runs for 25 Mins for just select query. But while doing merge (first time load) , it has to insert all records and below process is getting hanged after running 1.5-2 hrs (With No inserts)
HTML Code:
MERGE INTO schemaname.Customer_Table A
USING ( SELECT DISTINCT B.Name , B.CUST_ID, B.ORG_ID from schemaname.Customer_Staging B
WHERE (B.Name is not null and length(B.Name)>0) and (B.CUST_ID is not null and length(B.CUST_ID)>0) and (B.ORG_ID is NOT null and length(B.ORG_ID) > 0)) B
ON B.Name = A.Name and B.CUST_ID=A.CUST_ID and B.ORG_ID=A.ORG_ID and A.Load_dt is null
WHEN NOT MATCHED THEN INSERT (Name,CUST_ID,Load_dt,ORG_ID)
VALUES(B.Name,B.CUST_ID,current timestamp - current timeZone,B.ORG_ID);
DDL columns for both staging and Target is same .
Included Unique index for three columns Name,CUST_ID,ORG_ID using
Please can someone help how to tweak this query or use best approach.
any help appreciated
Thanks
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