Path Expression是SAP CDS View中的一个重要概念,用于在数据模型中定义字段之间的关系和连接。它允许用户在一个CDS视图中引用另一个CDS视图,并建立它们之间的关联。通过使用Path Expression,用户可以在查询中轻松地访问和检索相关的数据,而无需手动编写复杂的SQL连接语句。 Path Expression的作用 Path Expression在SAP CD...
Path Expression是SAP CDS View中的一个重要概念,用于在数据模型中定义字段之间的关系和连接。它允许用户在一个CDS视图中引用另一个CDS视图,并建立它们之间的关联。通过使用Path Expression,用户可以在查询中轻松地访问和检索相关的数据,而无需手动编写复杂的SQL连接语句。 Path Expression的作用 Path Expression在SAP CD...
Path expression in CDS view: @AbapCatalog.sqlViewName:'ZCDS_ON_ASSOC1'defineviewzcds_on_assocwithparametersairport:S_FROMAIRPasselectfromzcds_assoc2ascds2{cds2.carrid,cds2.connid,cds2.airportfrom,cds2._sair.name,-- useinnerjoin...bydefaultassociationusesleftouterjoincds2._sfli.planetype}...
接下来,我们创建CDS视图,并使用@Aggregation注解对订单行项目进行聚合: -- CDS View Definition@AbapCatalog.sqlViewName:'ZCDS_SalesOrder'@AbapCatalog.compiler.compareFilter:true@AccessControl.authorizationCheck:#CHECK@EndUserText.label:'Sales Order CDS View'defineviewZSalesOrderasselectfromSalesOrderHeaderassocia...
When a CDS view is activated, a join defined by an association is built for every use in a path expression and not for the definition of the association. No joins are constructed for associations that are not used in their CDS views. ...
本文阐述了ABAP CDS association的概念,并且展示了在CDS视图中和SQL语句中写路径表达式(Path Expression)代码的方法。我也会解释如何在CDS asociation中指定inner join——默认情况下是left outer join,以及如何为association添加过滤。 对于CDS的相关开发,SAP希望我们使用association而不是join,因为association更加接近“概念思...
In a set-valued path expression, it is sufficient for the condition to be true for just one of the values. The addition BYPASS WHEN can be used to specify a bypass condition for an element element. If the condition is met, the element in question is not used for authorization filtering....
CREATE TABLE SalesOrderItem (ItemID INT PRIMARY KEY,SalesOrderID INT,ProductID INT,Quantity INT,UnitPrice DECIMAL(10,2),Discount DECIMAL(5,2));```接下来，我们创建CDS视图，并使用`@Aggregation`注解对订单行项目进行聚合：```sql -- CDS View Definition @AbapCatalog.sqlViewName: 'ZCDS_SalesOrder'...
An association of aSELECT statementin a CDS view can be accessed as follows: By specifying its name in apath expressionin the same statement and in all places where this is documented. If an association is published using apath expressionin theSELECT listof the currentSELECT statement, the fo...
sqlViewName:It is mandatory annotation and which is created in SE11 (16 Characters length) after activating and it will not be same as view name/entity name. @AbapCatalog.compiler.compareFilter: It defines the evaluation of filter condition in path expression. True: If they match, the ...