Merge pull request #281 from tigergraph/DOC-2408-aggreg-func-empty-nuance

Doc 2408 aggreg func empty nuance

Author: victorleeTG

modules/querying/pages/func/aggregation-functions.adoc

@@ -101,7 +101,14 @@ count([1, 1, 2, 2) => 4
 
 Returns the member with the maximum value in a set or bag.
 The function can only take set/bag expressions whose members are numeric types.
-Returns 0 if the input set is empty.
+
+[NOTE]
+====
+If the input set is empty:
+
+* If the function is used to aggregate the vertex or edge attributes selected by a SELECT or MERGE clause, then the return value is the minimum possible value for that data type (similar to MaxAccum behavior).
+* Otherwise, the return value is 0.
+====
 
 [discrete]
 === Return type
@@ -138,7 +145,15 @@ max([1, 1, 3, 3]) => 3
 === Description
 
 Returns the member with the minimum value in a set or bag. The function can only take set/bag expressions whose members are numeric types.
-Returns 0 if the input set is empty.
+
+[NOTE]
+====
+If the input set is empty:
+
+* If the function is used to aggregate the vertex or edge attributes selected by a SELECT or MERGE clause, then the return value is the maximum possible value for that data type (similar to MinAccum behavior).
+* Otherwise, the return value is 0.
+====
+
 
 [discrete]
 === Return type