zoudan commented on code in PR #3237:
URL: https://github.com/apache/calcite/pull/3237#discussion_r1225056926
##########
core/src/main/java/org/apache/calcite/runtime/SqlFunctions.java:
##########
@@ -4102,6 +4102,45 @@ public static List reverse(List list) {
return list;
}
+ /** SQL {@code ARRAY_TO_STRING(array, delimiter)} function. */
+ public static String arrayToString(List list, String delimiter) {
+ return arrayToString(list, delimiter, null);
+ }
+
+ /** SQL {@code ARRAY_TO_STRING(array, delimiter, nullText)} function. */
+ public static String arrayToString(List list, String delimiter, @Nullable
String nullText) {
Review Comment:
Considering performance, I tend to not use lambda. WDYT?
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