richardstartin commented on code in PR #8563:
URL: https://github.com/apache/pinot/pull/8563#discussion_r854910227


##########
pinot-common/src/main/java/org/apache/pinot/common/function/FunctionRegistry.java:
##########
@@ -122,7 +141,12 @@ public static boolean containsFunction(String 
functionName) {
   @Nullable
   public static FunctionInfo getFunctionInfo(String functionName, int 
numParameters) {
     Map<Integer, FunctionInfo> functionInfoMap = 
FUNCTION_INFO_MAP.get(canonicalize(functionName));
-    return functionInfoMap != null ? functionInfoMap.get(numParameters) : null;
+
+    if (functionInfoMap != null && functionInfoMap.containsKey(numParameters)) 
{
+      return functionInfoMap.get(numParameters);
+    } else {
+      return VARARGS_FUNCTION_INFO_MAP.getOrDefault(functionName, null);

Review Comment:
   `Map#get` does the same thing



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