YiwenWu commented on code in PR #3684:
URL: https://github.com/apache/calcite/pull/3684#discussion_r1497482552
##########
core/src/main/java/org/apache/calcite/runtime/SqlFunctions.java:
##########
@@ -1491,6 +1491,19 @@ public static String concatMultiWithNull(String... args)
{
public static String concatMultiWithSeparator(String... args) {
// the separator arg could be null
final String sep = args[0] == null ? "" : args[0];
+ return concatMultiWithSeparator(sep, args);
+ }
+
+ /** SQL {@code CONCAT_WS(sep, arg1, arg2, ...)} function,
+ * return null as null sep . */
+ public static @Nullable String concatMultiWithSeparatorNullable(String...
args) {
+ if(args[0] == null){
+ return null;
+ }
+ return concatMultiWithSeparator(args[0], args);
Review Comment:
done
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