Fix hypothetical set functions with filter that removes all rows

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

@@ -42,6 +42,7 @@ import org.h2.value.Value;
 import org.h2.value.ValueArray;
 import org.h2.value.ValueBoolean;
 import org.h2.value.ValueDouble;
+import org.h2.value.ValueInt;
 import org.h2.value.ValueLong;
 import org.h2.value.ValueNull;
 import org.h2.value.ValueRow;
@@ -453,6 +454,19 @@ public class Aggregate extends AbstractAggregate {
     private Value getHypotheticalSet(Session session, AggregateData data) {
         AggregateDataCollecting collectingData = (AggregateDataCollecting) data;
         Value arg = collectingData.getSharedArgument();
+        if (arg == null) {
+            switch (aggregateType) {
+            case RANK:
+            case DENSE_RANK:
+                return ValueInt.get(1);
+            case PERCENT_RANK:
+                return ValueDouble.ZERO;
+            case CUME_DIST:
+                return ValueDouble.ONE;
+            default:
+                throw DbException.getUnsupportedException("aggregateType=" + aggregateType);
+            }
+        }
         collectingData.add(session.getDatabase(), arg);
         Value[] array = collectingData.getArray();
         Comparator<Value> sort = orderBySort.getRowValueComparator();

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

@@ -90,19 +90,31 @@ SELECT
     RANK(1) WITHIN GROUP (ORDER BY V) OVER (ORDER BY V) R1,
     RANK(3) WITHIN GROUP (ORDER BY V) OVER (ORDER BY V) R3,
     RANK(7) WITHIN GROUP (ORDER BY V) OVER (ORDER BY V) R7,
+    RANK(7) WITHIN GROUP (ORDER BY V) FILTER (WHERE V <> 2) OVER (ORDER BY V) F7,
     V
     FROM TEST ORDER BY V;
-> R1 R3 R7 V
-> -- -- -- -
-> 1  2  2  1
-> 1  3  3  2
-> 1  3  5  3
-> 1  3  5  3
-> 1  3  6  4
-> 1  3  7  5
-> 1  3  8  6
+> R1 R3 R7 F7 V
+> -- -- -- -- -
+> 1  2  2  2  1
+> 1  3  3  2  2
+> 1  3  5  4  3
+> 1  3  5  4  3
+> 1  3  6  5  4
+> 1  3  7  6  5
+> 1  3  8  7  6
 > rows (ordered): 7
 
+SELECT
+    RANK(1) WITHIN GROUP (ORDER BY V) FILTER (WHERE FALSE) R,
+    DENSE_RANK(1) WITHIN GROUP (ORDER BY V) FILTER (WHERE FALSE) D,
+    PERCENT_RANK(1) WITHIN GROUP (ORDER BY V) FILTER (WHERE FALSE) P,
+    CUME_DIST(1) WITHIN GROUP (ORDER BY V) FILTER (WHERE FALSE) C
+    FROM VALUES (1) T(V);
+> R D P   C
+> - - --- ---
+> 1 1 0.0 1.0
+> rows: 1
+
 SELECT RANK(1) WITHIN GROUP (ORDER BY V, V) FROM TEST;
 > exception SYNTAX_ERROR_2