Add Oracle compatibility STATS_MODE()

h2/src/main/org/h2/expression/aggregate/Aggregate.java

@@ -210,6 +210,8 @@ public class Aggregate extends Expression {
         addAggregate("MEDIAN", AggregateType.MEDIAN);
         addAggregate("ARRAY_AGG", AggregateType.ARRAY_AGG);
         addAggregate("MODE", AggregateType.MODE);
+        // Oracle compatibility
+        addAggregate("STATS_MODE", AggregateType.MODE);
     }
 
     private static void addAggregate(String name, AggregateType type) {

h2/src/test/org/h2/test/scripts/functions/aggregate/mode.sql

@@ -27,6 +27,10 @@ SELECT MODE(V), MODE(V) FILTER (WHERE (V > 1)), MODE(V) FILTER (WHERE (V < 0)) F
 > 1       2                              null
 > rows: 1
 
+-- Oracle compatibility
+SELECT STATS_MODE(V) FROM TEST;
+>> 1
+
 INSERT INTO TEST VALUES (2), (3), (3);
 > update count: 3