Disallow window ordering clause for RATIO_TO_REPORT

h2/src/docsrc/help/help.csv

@@ -5559,7 +5559,7 @@ OVER windowNameOrSpecification
 ","
 Returns the ratio of a value to the sum of all values.
 If argument is NULL or sum of all values is 0, then the value of function is NULL.
-Window frame clause is not allowed for this function.
+Window ordering and window frame clauses are not allowed for this function.
 
 Window functions are currently experimental in H2 and should be used with caution.
 They also may require a lot of memory for large queries.

h2/src/main/org/h2/expression/analysis/WindowFunction.java

@@ -451,6 +451,9 @@ public class WindowFunction extends DataAnalysisOperation {
                 throw DbException.getSyntaxError(sql, sql.length() - 1, "ORDER BY");
             default:
             }
+        } else if (type == WindowFunctionType.RATIO_TO_REPORT) {
+            String sql = getSQL();
+            throw DbException.getSyntaxError(sql, sql.length() - 1);
         }
         super.optimize(session);
         if (args != null) {

h2/src/test/org/h2/test/scripts/functions/window/ratio_to_report.sql

@@ -31,5 +31,8 @@ SELECT ID, N, RATIO_TO_REPORT(N) OVER() R2R FROM TEST;
 > 5  -8   null
 > rows: 5
 
+SELECT RATIO_TO_REPORT(N) OVER (ORDER BY N) FROM TEST;
+> exception SYNTAX_ERROR_1
+
 DROP TABLE TEST;
 > ok