Github user eminency commented on a diff in the pull request:
https://github.com/apache/tajo/pull/883#discussion_r47589327
--- Diff:
tajo-core/src/main/java/org/apache/tajo/engine/function/FunctionLoader.java ---
@@ -299,4 +284,38 @@ private static StaticMethodInvocationDesc
extractStaticMethodInvocation(Method m
return sqlFuncs;
}
+
+ public static Collection<FunctionDesc> loadFunctions(TajoConf conf)
throws IOException, AmbiguousFunctionException {
+ List<FunctionDesc> functionList = new
ArrayList<>(loadBuiltinFunctions().values());
+ List<FunctionDesc> udfs = loadUserDefinedFunctions(conf);
+
+ return mergeFunctionLists(functionList, udfs);
+ }
+
+ @SafeVarargs
+ static Collection<FunctionDesc> mergeFunctionLists(List<FunctionDesc>
... functionLists)
+ throws AmbiguousFunctionException {
+
+ Map<Integer, FunctionDesc> funcMap = new HashMap<>();
+ List<FunctionDesc> baseFuncList = functionLists[0];
+
+ // Build a map with a first list
+ for (FunctionDesc desc: baseFuncList) {
+ funcMap.put(desc.hashCodeWithoutType(), desc);
+ }
+
+ // Check duplicates for other function lists(should be UDFs
practically)
+ for (int i=1; i<functionLists.length; i++) {
+ for (FunctionDesc desc: functionLists[i]) {
+ if (funcMap.containsKey(desc.hashCodeWithoutType())) {
+ throw new AmbiguousFunctionException(String.format("UDF %s",
desc.toString()));
--- End diff --
It is based on the error message template that has existed.
https://github.com/apache/tajo/blob/ef94bb38d225deaff2d1eeb3d916fbe765412c3a/tajo-common/src/main/java/org/apache/tajo/exception/ErrorMessages.java#L87
So to fix as you advised, some other positions need to be fixed.
If you need, I think you'd better create another issue.
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