ihuzenko commented on a change in pull request #1527: DRILL-4456: Add Hive
translate UDF
URL: https://github.com/apache/drill/pull/1527#discussion_r232305628
##########
File path:
contrib/storage-hive/core/src/main/java/org/apache/drill/exec/expr/fn/HiveFunctionRegistry.java
##########
@@ -102,15 +116,15 @@ public void register(DrillOperatorTable operatorTable) {
}
}
- private <C,I> void register(Class<? extends I> clazz,
ArrayListMultimap<String,Class<? extends I>> methods) {
+ private <I> void register(Class<? extends I> clazz,
ArrayListMultimap<String, Class<? extends I>> methods) {
Review comment:
If it's not required to have separate renameUDF(names) method, then it's
possible to simplify body of this method:
```
private <C, I> void register(Class<? extends I> clazz,
ArrayListMultimap<String, Class<? extends I>> methods) {
Description desc = clazz.getAnnotation(Description.class);
Stream<String> names;
if (desc != null) {
names = Stream.of(desc.name().split(",")).map(String::trim);
} else {
names = Stream.of(clazz).map(Class::getName)
.map(name -> name.replace('.', '_'));
}
names.map(String::toLowerCase)
.map(funName -> FUNCTION_REPLACE_MAP.getOrDefault(funName, funName))
.forEach(udfFunName -> methods.put(udfFunName, clazz));
UDFType type = clazz.getAnnotation(UDFType.class);
if (type != null && !type.deterministic()) {
nonDeterministicUDFs.add(clazz);
}
}
```
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