Github user jihoonson commented on a diff in the pull request:
https://github.com/apache/tajo/pull/839#discussion_r44932314
--- Diff: tajo-common/src/main/java/org/apache/tajo/util/StringUtils.java
---
@@ -377,23 +379,87 @@ public static String unescapePathName(String path) {
}
/**
+ * Concatenate all objects' string with the delimiter ", "
+ *
+ * @param objects Iterable objects
+ * @return A joined string
+ */
+ public static String join(Iterable objects) {
--- End diff --
You need to add some tests for newly added methods.
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