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https://issues.apache.org/jira/browse/NIFI-1280?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15959473#comment-15959473
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Mark Payne commented on NIFI-1280:
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I've created a PR that I think is sufficient. There are a few more things that
I would like to do, but this has dragged on long enough without me pushing
anything, so I've pushed a PR so that people can review & hopefully get merged.
Will create separate JIRA's for the remaining enhances that I would like to
perform. The most significant is to allow more flexibility in choosing the
schema to use. Rather than requiring a Schema Name be provided with a Schema
registry would like to allow user to use an attribute or read schema from the
content of the FlowFile itself in cases such as Avro. In addition, I want to
add updates to include the schema on the outgoing records when appropriate.
> Create QueryFlowFile Processor
> ------------------------------
>
> Key: NIFI-1280
> URL: https://issues.apache.org/jira/browse/NIFI-1280
> Project: Apache NiFi
> Issue Type: Task
> Components: Extensions
> Reporter: Mark Payne
> Assignee: Mark Payne
> Fix For: 1.2.0
>
>
> We should have a Processor that allows users to easily filter out specific
> columns from CSV data. For instance, a user would configure two different
> properties: "Columns of Interest" (a comma-separated list of column indexes)
> and "Filtering Strategy" (Keep Only These Columns, Remove Only These Columns).
> We can do this today with ReplaceText, but it is far more difficult than it
> would be with this Processor, as the user has to use Regular Expressions,
> etc. with ReplaceText.
> Eventually a Custom UI could even be built that allows a user to upload a
> Sample CSV and choose which columns from there, similar to the way that Excel
> works when importing CSV by dragging and selecting the desired columns? That
> would certainly be a larger undertaking and would not need to be done for an
> initial implementation.
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