array_flatten

array_flatten [WhereOS, SQL, Spark, Hive]

Class hivemall.tools.array.ArrayFlattenUDF
Usage array_flatten(array>) - Returns an array with the elements flattened.

SELECT array_flatten(array(array(1,2,3),array(4,5),array(6,7,8)));
[1,2,3,4,5,6,7,8]

More functions can be added to WhereOS via Python or R bindings or as Java & Scala UDF (user-defined function), UDAF (user-defined aggregation function) and UDTF (user-defined table generating function) extensions. Custom libraries can be added on via Settings-page or installed from WhereOS Store.

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