Github user hyunsik commented on a diff in the pull request:
https://github.com/apache/tajo/pull/526#discussion_r28569644
--- Diff:
tajo-core/src/main/java/org/apache/tajo/engine/function/FunctionLoader.java ---
@@ -66,7 +80,48 @@
}
}
- return map.values();
+ return map;
+ }
+
+ /**
+ * Load functions that are optionally defined by users.
+ *
+ * @param conf
+ * @param functionMap
+ * @return
+ * @throws IOException
+ */
+ public static Map<FunctionSignature, FunctionDesc>
loadOptionalFunctions(TajoConf conf,
--- End diff --
In my opinion, 'user-defined function' would be a better word than
'optional function'
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