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How do I use the Projection Processor in SAM?

I want to use the Projection Processor in my Streaming Analytics App to concatenate 2 fields of a data stream, so I can use both of them in a join processor. When I try to use the Projection processor, though, and I enter the projection fields and CONCAT-function and the right arguments and a field name, and then I press Ok and re-enter the processor, it is completely empty again. So how do I use the processor in a way that it doesn't reset all the time? Or is there a workaround to use 2 fields on a join processor?

EDIT: I am using HDF


I found a work-around using NiFi: I use NiFi to add additional info to the content of the flow file and I updated the Schema Registry to reflect this, to then Join over the new value in the field "SignalID" as I called it.


you could write your own User defined processor also.

The above question and the entire response thread below were originally posted in the Community Help track. On Mon Jul 22 15:13 UTC 2019, a member of the HCC moderation staff moved it to the Data Ingestion & Streaming track. The Community Help Track is intended for questions about using the HCC site itself.

Bill Brooks, Community Moderator
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