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https://issues.apache.org/jira/browse/NIFI-1280?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15965131#comment-15965131
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ASF subversion and git services commented on NIFI-1280:
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Commit a88d3bfa3c53d9cbe375f2b89eaa9248eb92df29 in nifi's branch
refs/heads/master from [~markap14]
[ https://git-wip-us.apache.org/repos/asf?p=nifi.git;h=a88d3bf ]
NIFI-1280: Refactoring to make more generic so that other data types can be
supported; created InputStreams to content on-demand so that multiple passes
can be made over FlowFile content if required. Created new Controller Services
for reading and writing specific data types
Signed-off-by: Matt Burgess <[email protected]>
> 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
>
> Attachments: QueryFlowFile_Record_Reader-Writer_Examples.xml
>
>
> 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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