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https://issues.apache.org/jira/browse/NIFI-4024?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16038933#comment-16038933
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Joseph Witt commented on NIFI-4024:
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[~champagst] A key consideration here is that a given flowfile can contain one
or many records. Extracting a given record field to the flowfile attribute
then has a potential complexity of being a many to one challenge.
Alternatively, and by intent, if you need to ensure that all records of a given
flowfile have some shared characteristic or perhaps field value you can use the
upcoming nifi 1.3.0 PartitionRecord processor to ensure that for a given
flowfile all records do indeed have some matching value. It is powered by
RecordPath and it extracts that matched value to an attribute.
> Create EvaluateRecordPath processor
> -----------------------------------
>
> Key: NIFI-4024
> URL: https://issues.apache.org/jira/browse/NIFI-4024
> Project: Apache NiFi
> Issue Type: New Feature
> Reporter: Steve Champagne
> Priority: Minor
>
> With the new RecordPath DSL, it would be nice if there was a processor that
> could pull fields into attributes of the flowfile based on a RecordPath. This
> would be similar to the EvaluateJsonPath processor that currently exists,
> except it could be used to pull fields from arbitrary record formats. My
> current use case for it would be pulling fields out of Avro records while
> skipping the steps of having to convert Avro to JSON, evaluate JsonPath, and
> then converting back to Avro.
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