Merge pull request github#15710 from michaelnebel/csharp/refreadonlyparameters

C# 12: Ref readonly parameters.

Author: michaelnebel

csharp/downgrades/fd04e45710e1988076801608abffdfa013b680fc/old.dbscheme

@@ -0,0 +1,19 @@
+class Parameter extends @parameter {
+  string toString() { none() }
+}
+
+class TypeOrRef extends @type_or_ref {
+  string toString() { none() }
+}
+
+class Parameterizable extends @parameterizable {
+  string toString() { none() }
+}
+
+from
+  Parameter p, string name, TypeOrRef typeId, int index, int mode, Parameterizable parentId,
+  Parameter unboundId, int updatedMode
+where
+  params(p, name, typeId, index, mode, parentId, unboundId) and
+  if mode = 6 then updatedMode = 0 else updatedMode = mode
+select p, name, typeId, index, updatedMode, parentId, unboundId