Fix update-all for composite key (#1234)

lib/arel/visitors/sqlserver.rb

@@ -30,10 +30,42 @@ def visit_Arel_Nodes_Concat(o, collector)
       end
 
       def visit_Arel_Nodes_UpdateStatement(o, collector)
-        if o.orders.any? && o.limit.nil?
-          o.limit = Nodes::Limit.new(9_223_372_036_854_775_807)
+        if has_join_and_composite_primary_key?(o)
+          update_statement_using_join(o, collector)
+        else
+          o.limit = Nodes::Limit.new(9_223_372_036_854_775_807) if o.orders.any? && o.limit.nil?
+
+          super
         end
-        super
+      end
+
+      def visit_Arel_Nodes_DeleteStatement(o, collector)
+        if has_join_and_composite_primary_key?(o)
+          delete_statement_using_join(o, collector)
+        else
+          super
+        end
+      end
+
+      def has_join_and_composite_primary_key?(o)
+        has_join_sources?(o) && o.relation.left.instance_variable_get(:@klass).composite_primary_key?
+      end
+
+      def delete_statement_using_join(o, collector)
+        collector << "DELETE "
+        visit o.relation.left, collector
+        collector << " FROM "
+        visit o.relation, collector
+        collect_nodes_for o.wheres, collector, " WHERE ", " AND "
+      end
+
+      def update_statement_using_join(o, collector)
+        collector << "UPDATE "
+        visit o.relation.left, collector
+        collect_nodes_for o.values, collector, " SET "
+        collector << " FROM "
+        visit o.relation, collector
+        collect_nodes_for o.wheres, collector, " WHERE ", " AND "
       end
 
       def visit_Arel_Nodes_Lock(o, collector)