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Is it possible to use the "Custom aggregations" tab in the Group recipe when using the DSS recipe engine or does the engine need to be "in-database" for that tab to be useful? I've tried using it but I cannot reference columns in the input dataset (which is a file).

Thanks and I am using Data Science Studio 4.0.7.

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Custom aggregations are only possible in the SQL, Hive, Impala and Spark engines, so you'll need one of these to be available (either because the dataset is a SQL table, on HDFS, or if you have Spark installed)
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