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From l vic <>
Subject Re: merging with default values?
Date Thu, 10 Jan 2019 21:32:56 GMT
Yes i do know them ahead of time, UpdateAttribute rules might work.
Thank you

On Thu, Jan 10, 2019 at 2:46 PM Russ Weiher <>

> Do you know the name of the attributes you are looking for ahead of time?
> If so, the UpdateAttribute processor has an “Advanced” section that lets
> you write conditional rules based on flowfile attributes and properties.
> If you haven’t already checked that out, it might be a good place to
> start.  There are some good examples in the NiFi documentation for that
> processor.
> *Russ Weiher*
> BI CI Solutions Architect
> Progenity, Inc.
> *From:* l vic []
> *Sent:* Thursday, January 10, 2019 2:18 PM
> *To:*
> *Subject:* merging with default values?
> I have to merge results of 3 different queries into one flowfile....
> The problem happens if some of the queries result in empty resultset. For
> example, suppose i have 3 incoming connections for MergeContent:
> query1->flowfile1/attribute1, query2->flowfile2/attribute2,
> query3->flowfile3/attribute3
> And query2 returns empty resultset. In this case attribute2 never shows up
> in the merged flowfile.
> Can someone recommend merge solution where i would always have attribute2
> in the result but with some default value ( empty string assuming
> attribute2 is text)?
> Thank you...
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