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https://issues.apache.org/jira/browse/ACCUMULO-4595?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15895148#comment-15895148
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Christopher Tubbs commented on ACCUMULO-4595:
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A custom output format could be modified to validate table constraints. That
seems like the simplest option.
> Simple validator for inserting data
> -----------------------------------
>
> Key: ACCUMULO-4595
> URL: https://issues.apache.org/jira/browse/ACCUMULO-4595
> Project: Accumulo
> Issue Type: New Feature
> Reporter: Michael Wall
> Priority: Minor
> Fix For: 2.0.0
>
>
> It would be useful to be able to write custom validation for specific parts
> of a Key or Value that could be applied to both mutations on live ingest and
> writing RFiles for bulk loads. Initially I thought this could be done with a
> table constraint, but didn't consider the importdirectory use case where
> RFiles are bulk imported. This validation does not need to track state
> though. Thinking this is really only for simple validation. Couple of
> contrived examples.
> 1) Validate the CF starts with the string "abcd".
> 2) Validate the CV only contains strings from a predefined list of strings.
> 3) Validate the row only contains letters or numbers.
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