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https://issues.apache.org/jira/browse/NIFI-482?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14594303#comment-14594303
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Matt Gilman edited comment on NIFI-482 at 6/20/15 2:49 AM:
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[~markap14] Verified build. Reviewed code changes. When executing the supplied
sample, the first expression is invalid as expected. However the validation
error looked a little suspect [1]. I'm not sure if this was intended or if it
was something that was overlooked.
+1 for the expression language changes. If you want to revisit the validation
error if it's not what you were expecting to see, that's cool too :)
[1] 'attribute.1' validated against
'${allMatchingAttributes('a.*'):contains('2'):count():gt(2)}' is invalid
because Expression attempts to call function 'null' on the result of 'null'.
This is not allowed. Instead, use "${literal( ${<embedded expression>}
):null(...)"
was (Author: mcgilman):
[~markap14] Verified build. Review code changes. When executing the supplied
sample, the first expression is invalid as expected. However the validation
error looked a little suspect [1]. I'm not sure if this was intended or if it
was something that was overlooked.
+1 for the expression language changes. If you want to revisit the validation
error if it's not what you were expecting to see, that's cool too :)
[1] 'attribute.1' validated against
'${allMatchingAttributes('a.*'):contains('2'):count():gt(2)}' is invalid
because Expression attempts to call function 'null' on the result of 'null'.
This is not allowed. Instead, use "${literal( ${<embedded expression>}
):null(...)"
> users are currently able to evaluate a function against the result of an
> aggregrate function
> --------------------------------------------------------------------------------------------
>
> Key: NIFI-482
> URL: https://issues.apache.org/jira/browse/NIFI-482
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core Framework
> Affects Versions: 0.0.2
> Reporter: Ben Icore
> Assignee: Mark Payne
> Fix For: 0.2.0
>
> Attachments:
> 0001-NIFI-482-Allowed-for-new-literal-function.-Make-expr.patch
>
>
> users should not be able to evaluate a function against the result of an
> aggregrate function as it will often yield indeterminate results.
>
> expression should be invalid
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