Github user dlukyanov commented on the issue:
https://github.com/apache/nifi/pull/1662
@mattyb149, I renamed the processor, created test cases for all mentioned
in pull request description.
The case
[test_sql_01_select.groovy](https://github.com/dlukyanov/nifi/blob/master/nifi-nar-bundles/nifi-groovyx-bundle/nifi-groovyx-processors/src/test/resources/groovy/test_sql_01_select.groovy)
dedicated to a new way of controller services usage from groovy script.
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