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I assume you're using an ODBC driver to connect Alteryx and CDH. If this is the case, it's the driver that does the job in the background irrespective of version of Alteryx you're running. Having said that, the supported ODBC driver by Simba which can be downloaded from here is certified for CDH v5.8 but from my experience should work on later versions as well.
The Cloudera ODBC driver for Impala is not tested when new versions of Alteryx are released which is why it's not a supported driver. It does work in most instances but I'd encourage you to use the supported Simba driver if possible.