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2.15. What is the use of INROWNUM and OUTROWNUM datastage variables?

@INROWNUM and @OUTROWNUM are internal datastage variables which do the following:

@INROWNUM counts incoming rows to a transformer in a datastage job
@OUTROWNUM counts oucoming rows from a transformer in a datastage job

These variables can be used to generate sequences, primary keys, id's, numbering rows and also for debugging and error tracing.
They play similiar role as sequences in Oracle.

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