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https://issues.apache.org/jira/browse/HIVE-3866?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14583315#comment-14583315
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Michael Haeusler commented on HIVE-3866:
----------------------------------------
Is this issue duplicated by Hive-10788?
> Allow sort_array to work on non-primitive types.
> ------------------------------------------------
>
> Key: HIVE-3866
> URL: https://issues.apache.org/jira/browse/HIVE-3866
> Project: Hive
> Issue Type: Improvement
> Reporter: Ron Bodkin
>
> It's also nice to be able to sort an array of structs, as a kind of
> generalization of HIVE-1128, so you can have not only the maximum value from
> a list but a sorted list of value and source keys. As with HIVE-3865 it's
> fairly easy to relax the assumption that sort_array works only on primitives:
> @@ -35,6 +35,7 @@ import
> org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorConverters;
> import
> org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorConverters.Converter;
> import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorFactory;
> import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorUtils;
> +import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoUtils;
>
> /**
> * Generic UDF for array sort
> @@ -66,10 +67,12 @@ public class GenericUDFSortArray extends GenericUDF {
>
> switch(arguments[0].getCategory()) {
> case LIST:
> -
> if(((ListObjectInspector)(arguments[0])).getListElementObjectInspector()
> - .getCategory().equals(Category.PRIMITIVE)) {
> - break;
> - }
> + ObjectInspector loi =
> ((ListObjectInspector)(arguments[0])).getListElementObjectInspector();
> + if (!ObjectInspectorUtils.compareSupported(loi)) {
> + throw new UDFArgumentTypeException(0,
> + "Cannot support comparison of map<> type or complex type
> containing map<>.");
> + }
> + break;
> default:
> throw new UDFArgumentTypeException(0, "Argument 1"
> + " of function SORT_ARRAY must be array "
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