How to implement a CURSOR & looping inside ODI 11g Procedure

Hello All,
I have requirement where in my source data has multiple rows for an Item number with different Product numbers, I have to concatenate all the Product Numbers of speciifc Item number and update it into another column on the same table. How can we achive this inside ODI 11g? Can we use ODI Procedure? Can we implement a Cursor inside the ODI procedure to group the records based on Item Number and use a loop to concatenate as we do it inside a normal PL SQL procedure, if so, please let me know?
Ex source:
Column1,Column2, Column3
Item01, Product01, null
Item01, Product02, null
Item01, Product03, null
Item02, Product01, null
Item02, Product08, null
need to convert/update this source data to
Column1,Column2, Column3
Item01, Product01, Product01 Product02 Product03
Item01, Product02, Product01 Product02 Product03
Item01, Product03, Product01 Product02 Product03
Item02, Product01, Product01 Product08
Item02, Product08, Product01 Product08
Regards,
MRM

Hi Thanks for the reply,
I replaced the code for column3 mapping to
CASE WHEN POC_DECODE.SOURCE IS NOT NULL THEN
SELECT LISTAGG(POC_DECODE.TARGET,'')
WITHIN GROUP ( ORDER BY POC_DECODE.SOURCE)
FROM TABLE POC_DECODE A WHERE A.SOURCE=POC_DECODE.SOURCE
END
I get the below error:
ODI-1228: Task TEST_POC_CONCATE (Integration) fails on the target ORACLE connection ORACLE_ORMS_DS.
Caused By: java.sql.SQLSyntaxErrorException: ORA-00923: FROM keyword not found where expected
     at oracle.jdbc.driver.SQLStateMapping.newSQLException(SQLStateMapping.java:91)
     at oracle.jdbc.driver.DatabaseError.newSQLException(DatabaseError.java:133)
     at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:206)
     at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:455)
     at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:413)
     at oracle.jdbc.driver.T4C8Oall.receive(T4C8Oall.java:1035)
     at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:194)
     at oracle.jdbc.driver.T4CPreparedStatement.executeForRows(T4CPreparedStatement.java:953)
     at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1224)
     at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3386)
     at oracle.jdbc.driver.OraclePreparedStatement.executeUpdate(OraclePreparedStatement.java:3467)
     at oracle.jdbc.driver.OraclePreparedStatementWrapper.executeUpdate(OraclePreparedStatementWrapper.java:1350)
     at com.sunopsis.sql.SnpsQuery.executeUpdate(SnpsQuery.java:665)
     at com.sunopsis.dwg.dbobj.SnpSessTaskSql.executeUpdate(SnpSessTaskSql.java:3218)
     at com.sunopsis.dwg.dbobj.SnpSessTaskSql.execStdOrders(SnpSessTaskSql.java:1785)
     at com.sunopsis.dwg.dbobj.SnpSessTaskSql.treatTaskTrt(SnpSessTaskSql.java:2805)
     at com.sunopsis.dwg.dbobj.SnpSessTaskSqlI.treatTaskTrt(SnpSessTaskSqlI.java:68)
     at com.sunopsis.dwg.dbobj.SnpSessTaskSql.treatTask(SnpSessTaskSql.java:2515)
     at com.sunopsis.dwg.dbobj.SnpSessStep.treatAttachedTasks(SnpSessStep.java:534)
     at com.sunopsis.dwg.dbobj.SnpSessStep.treatSessStep(SnpSessStep.java:449)
     at com.sunopsis.dwg.dbobj.SnpSession.treatSession(SnpSession.java:1954)
     at oracle.odi.runtime.agent.processor.impl.StartSessRequestProcessor$2.doAction(StartSessRequestProcessor.java:322)
     at oracle.odi.core.persistence.dwgobject.DwgObjectTemplate.execute(DwgObjectTemplate.java:224)
     at oracle.odi.runtime.agent.processor.impl.StartSessRequestProcessor.doProcessStartSessTask(StartSessRequestProcessor.java:246)
     at oracle.odi.runtime.agent.processor.impl.StartSessRequestProcessor.access$0(StartSessRequestProcessor.java:237)
     at oracle.odi.runtime.agent.processor.impl.StartSessRequestProcessor$StartSessTask.doExecute(StartSessRequestProcessor.java:794)
     at oracle.odi.runtime.agent.processor.task.AgentTask.execute(AgentTask.java:114)
     at oracle.odi.runtime.agent.support.DefaultAgentTaskExecutor$2.run(DefaultAgentTaskExecutor.java:82)
     at java.lang.Thread.run(Thread.java:619)
Please help...

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