okumin commented on code in PR #4938:
URL: https://github.com/apache/hive/pull/4938#discussion_r1423354230
##########
ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDTFStack.java:
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@@ -63,11 +64,16 @@ public StructObjectInspector initialize(ObjectInspector[]
args)
}
if (!(args[0] instanceof ConstantObjectInspector)) {
throw new UDFArgumentException(
+ "The first argument to STACK() must be a constant.");
+ }
+ final Object value = ((ConstantObjectInspector)
args[0]).getWritableConstantValue();
+ if (!(value instanceof IntWritable)) {
Review Comment:
I added a validation since the current implementation throws a
ClassCastException. I can split PRs if we don't want to fix it in this PR.
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