perf example

performance/db/schema.cds

@@ -0,0 +1,47 @@
+using { Currency, cuid, managed } from '@sap/cds/common';
+
+namespace sap.capire.performance;
+
+
+entity OrdersHeaders : managed {
+  key ID   : UUID;
+  OrderNo  : String @title:'Order Number'; //> readable key 
+  buyer    : String;
+  currency : Currency;
+  Items    : Composition of many OrdersItems on Items.Header = $self;
+}
+
+entity OrdersItems   {
+    key ID    : UUID;
+    product   : Association to Books;
+    quantity  : Integer;
+    title     : String; //> intentionally replicated as snapshot from product.title
+    price     : Double; //> materialized calculated field
+    Header    : Association to OrdersHeaders;  
+};
+
+
+entity Books {
+  key ID : Integer;
+  title  : localized String(111);
+  descr  : localized String(1111);
+  author : Association to Authors;
+  stock  : Integer;
+  price  : Decimal;
+  currency : Currency;
+}
+
+entity Authors  {
+  key ID : Integer;
+  name   : String(111);
+  dateOfBirth  : Date;
+  dateOfDeath  : Date;
+  placeOfBirth : String;
+  placeOfDeath : String;
+  books  : Association to many Books on books.author = $self;
+}
+
+
+
+
+