Unique Index Error while running the ETL process

Question

Hi,
I have Installed Oracle BI Applications 7.9.4 and Informatica PowerCenter 7.1.4. I have done all the configuration steps as specified in the Oracle BI Applications Installation and Configuration Guide. While running the ETL process from DAC for Execution Plan 'Human Resources Oracle 11.5.10' some tasks going to status Failed.
When I checked the log files for these tasks, I found the following error
ANOMALY INFO::: Error while executing : CREATE INDEX:W_PAYROLL_F_ASSG_TMP:W_PRL_F_ASG_TMP_U1
MESSAGE:::java.lang.Exception: Error while execution : CREATE UNIQUE INDEX
W_PRL_F_ASG_TMP_U1
ON
W_PAYROLL_F_ASSG_TMP
INTEGRATION_ID ASC
,DATASOURCE_NUM_ID ASC
,EFFECTIVE_FROM_DT ASC
NOLOGGING PARALLEL
with error java.sql.SQLException: ORA-12801: error signaled in parallel query server P000
ORA-01452: cannot CREATE UNIQUE INDEX; duplicate keys found
EXCEPTION CLASS::: java.lang.Exception
I found some duplicate rows in the table W_PAYROLL_F_ASSG_TMP with the combination of the columns on which it is trying to create INDEX. Can anyone give me information for the following.
1. Why it is trying to create the unique index on the combination of columns which may not be unique.
2. Is it a problem with the data in the source database (means becoz of duplicate rows in the source system).
How we need to fix this error. Do we need to delete the duplicate rows from the table in the data warehouse manually and re-run the ETL process or is there any other way to fix the problem.

Answer 1

This query will identify the duplicate in the Warehouse table preventing the Index from being built:
select count(*), integration_id, src_eff_from_dt from w_employee_ds group by integration_id, src_eff_from_dt having count(*)>1;
To get the ETL to finish issue this delete to the W_EMPLOYEE_DS table:
delete from w_employee_ds where integration_id = '2' and src_eff_from_dt ='04-JAN-91';
To fix it so this does not happen again on another load you need to find the record in the Vision DB, it is in the PER_ALL_PEOPLE_F table. I have a Vision source and this worked:
select rowid, person_id , LAST_NAME FROM PER_ALL_PEOPLE_F
where EFFECTIVE_START_DATE = '04-JAN-91';
ROWID PERSON_ID
LAST_NAME
AAAWXJAAMAAAwl/AAL 6272
Kang
AAAWXJAAMAAAwmAAAI 6272
Kang
AAAWXJAAMAAAwmAAA4 6307
Lee
delete from PER_ALL_PEOPLE_F
where ROWID = 'AAAWXJAAMAAAwl/AAL';