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Posted to issues@nifi.apache.org by "Matt Burgess (JIRA)" <ji...@apache.org> on 2018/06/07 14:54:00 UTC

[jira] [Closed] (NIFI-5276) Add collectMatchingAttributes() function to NiFi Expression Language

     [ https://issues.apache.org/jira/browse/NIFI-5276?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Matt Burgess closed NIFI-5276.
------------------------------

> Add collectMatchingAttributes() function to NiFi Expression Language
> --------------------------------------------------------------------
>
>                 Key: NIFI-5276
>                 URL: https://issues.apache.org/jira/browse/NIFI-5276
>             Project: Apache NiFi
>          Issue Type: Improvement
>          Components: Core Framework
>            Reporter: Matt Burgess
>            Priority: Minor
>
> The EL functions for operating on attributes have been limited to expressions that result in boolean values, whether one or all attributes match the expression and the resulting operations result in true/false (true if all, true/false if any). This capability has been somewhat covered in NIFI-1705, but if a "collectMatchingAttributes" function was added to NiFi Expression Language, any following expressions resulting in strings (via a reducing operation like join()) would allow for the same capability, including the power of evoking other EL functions such as toLower(), etc.



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