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Handling JDBC Multitable Consumer to MapR DB JSON

Has anyone used a JDBC Multitable Consumer origin and a MapR DB / MapR DB JSON destination? We can use ${record:attribute('jdbc.tables')} for the Table Name parameter for MapR DB. However, how do one handle the value for Row Key? Is there a record attribute that will refer to say the primary key of the source tables? Or should there be a processor in the middle to parse the information out?

Thanks

Handling JDBC Multitable Consumer to MapR DB JSON

Has anyone used a JDBC Multitable Consumer origin and a MapR DB / MapR DB JSON destination? We can use ${record:attribute('jdbc.tables')} for the Table Name parameter for MapR DB. However, how do one handle the value for Row Key? Is there a record attribute that will refer to say the primary key of the source tables? Or should there be a processor in the middle to parse the information out?

Thanks