initial load

orders/db/performance_example_schema.cds

@@ -0,0 +1,58 @@
+using { Currency, User, managed, cuid } from '@sap/cds/common';
+using {Orders, OrderItems} from '../schema';
+
+namespace sap.capire.orders;
+
+entity OrdersHeaders : managed {
+  key ID   : UUID;
+  OrderNo  : String @title:'Order Number'; //> readable key 
+  buyer    : User;
+  currency : Currency;
+  Items    : Composition of many OrdersItems on Items.Header = $self;
+}
+
+entity OrdersItems   {
+    key ID    : UUID;
+    product   : Association to Products;
+    quantity  : Integer;
+    title     : String; //> intentionally replicated as snapshot from product.title
+    price     : Double; //> materialized calculated field
+    Header    : Association to OrdersHeaders;  
+};
+
+
+// static
+view OrdersItemsViewJoin as select 
+
+    OrdersHeaders.ID        as Header_ID, 
+    OrdersHeaders.OrderNo   as OrderNo, 
+    OrdersHeaders.buyer     as buyer, 
+    OrdersHeaders.currency  as currency,
+    OrdersItems.ID          as Item_ID,
+    OrdersItems.product     as product,
+    OrdersItems.quantity    as quantity,
+    OrdersItems.title       as title,
+    OrdersItems.price       as price
+
+ from OrdersHeaders JOIN OrdersItems on OrdersHeaders.ID = OrdersItems.Header;
+
+// dynamic entity
+entity OrderItemsViewAssoc as projection on Orders;
+
+// sort on right table 
+view SortedOrdersJoin as select 
+    OrderNo, 
+    buyer, 
+    currency,
+    Item_ID,
+    product,
+    quantity,
+    title,
+    price    
+from OrdersItemsViewJoin 
+order by title;
+
+// sort on items and join back to header via assoc
+view SortedOrdersAssoc as select
+from OrdersItems {*, Header.OrderNo, Header.buyer, Header.currency }
+order by OrdersItems.title;