kgyrtkirk commented on a change in pull request #1031:
URL: https://github.com/apache/hive/pull/1031#discussion_r434110907
##########
File path: ql/src/java/org/apache/hadoop/hive/ql/exec/DataSketchesFunctions.java
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@@ -235,12 +232,21 @@ public String getFunctionName() {
return Optional.empty();
} else {
JavaTypeFactoryImpl typeFactory = new JavaTypeFactoryImpl(new
HiveTypeSystemImpl());
+ Type type = returnType;
+ if (type instanceof ParameterizedType) {
+ ParameterizedType parameterizedType = (ParameterizedType) type;
+ if (parameterizedType.getRawType() == List.class) {
+ final RelDataType componentRelType =
typeFactory.createType(parameterizedType.getActualTypeArguments()[0]);
+ return Optional
+
.of(typeFactory.createArrayType(typeFactory.createTypeWithNullability(componentRelType,
true), -1));
+ }
Review comment:
idea was to leave "typeFactory" to handle it - although it will return
something - but it will not work properly
returned `Optional.empty()`
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