如果你在网络或者SCN上面搜索CDS,即SAP的Core Data Services,你会很容易地找到类似“Core Data Services(CDS)是一个在SAP HANA中用于定义和消费富语义数据模型的基础架构”这样的句子.在另一方面,在ABAP字典中似乎也有一种叫做ABAP CDS的东西.它们有什么关系?让我们从ABAP(还有ABAP CDS)文档的作者的视角中看看这个问题. 原文标题:CDS – One Concept, Two Flavors 本文链接:http://www.cnb…
动机 现在大家都知道单元测试对我们代码的好处.并且我们都承认它是开发过程中不可或缺的一部分.但是在把代码切换到数据库的模式下的时候,我们被粗暴地打回了软件测试的黑暗年代...我们现在面临着逻辑下推到ABAP CDS entities后,代码要如何测试的难题. CDS Test Double Framework允许开发者们通过众所周知的ABAP Unit Test Framework自动化地测试CDS entities. 本文链接:http://www.cnblogs.com/hhelibeb/p…
如管理学学者彼得·德鲁克所说:你无法管理你不能衡量的东西( If you can't measure it, you can't manage it).要对已有程序进行性能优化,首先要对它的运行状况做出量化分析. 将代码下推到ABAP CDS,是SAP推荐的一种优化方式.但正因逻辑从应用服务器向数据库的转移,传统运行时分析工具SAT也有了力所不能及之处.这时,我们需要新的工具来对这一新的开发对象的运行情况进行分析. 本文将介绍Plan Visualizer(以下简称PlanViz)在ABAP C…
JOINs in CDS View In ABAP CDS, Join between two data sources is allowed. Allowed joins are:- Inner Join/Join Left Outer Join Right Outer Join The post shows a simple Inner Join between data sources form SCARR & SPFLI table. In HANA studio, open ABAP…
下表显示了ABAP CDS中CDS视图中字符串的潜在SQL函数,以及对参数的要求.函数的含义可以在字符串的SQL函数下找到. 函数 参数类型 返回类型 CONCAT(arg1, arg2) See below SSTRING if an argument has the type SSTRING, else CHAR with the length of the result. CONCAT_WITH_SPACE(arg1, arg2, spaces ) arg1, arg2: see belo…
Association in ABAP CDS An association in CDS view joins different data sources. Defining and using associations is a high-value wrapping of the syntax for joins. A CDS View with association between SPFLI & SCARR table. @AbapCatalog.sqlViewName: ‘ZFL…
In the Part 1 blog, we have discussed below topics CDS annotations for Fiori List Report. How to create a Gateway service from ABAP CDS view How to create a Fiori List App report in Web IDE. How to Deploy the Fiori Application. In this blog, we are g…
From Create Fiori List App Report with ABAP CDS view – PART 1 In this blog, I am going to show How CDS view can be used to generate a Fiori List App Report. Below are the steps that need to be implemented to generate Fiori List App Report. CDS annota…
The syntax of the DDL and of the DCL of the ABAP CDS comprises elements of the general DDL and DCL of SQL. In addition, the syntax makes it possible to define annotations and associations. The syntax and semantics basically match the general CDS conc…
Open SQLは自動的クライアント処理をサポートしています. Open SQLでクライアント依存のデータソースにアクセスする時.デフォルトでは現在のクライアントのデータだけが考慮されます. クライアント依存のデータソースとは何でしょうか? 最初の列が組み込みディクショナリタイプCLNTのクライアント列である場合.ABAPディクショナリで定義されたデータベーステーブルまたはクラシックビューはクライアント依存です. CDSエンティティ(CDSビューおよびCDSテーブル関数)のクライアント依存関係お…
Create an ABAP Project in ABAP Development Tools (ADT): https://developers.sap.com/tutorials/abap-create-project.html Create and Run an ABAP Application: https://developers.sap.com/tutorials/abap-create-basic-app.html Create a Simple ABAP CDS View in…
Syntax ... ( name1, name2, ... ) ... Effect Defines the element names of a CDS view in ABAP CDS in a name list. The specified names name1, name2, ... are assigned to the elements defined explicitly in the SELECT list of the SELECT statement in the or…
Syntax ... @annotation ... Effect Specifies Annotation annotation in the definition of a CDS view of the ABAP CDS before statement DEFINE VIEW. The character @ must be placed before the name annotation of the annotation. The table below shows the pos…
Syntax ... annotation[.annotation1[.annotation2]][:value] ... Effect Annotation that can be specified at predefined positions within a CDS source code, to enhance a definition of the ABAP CDS with meta data. An annotation consists of a single or mul…
The following sections summarize the language elements of the DDL and DCL of the ABAP CDS, arranged by topics. •DDL ◦CDS Views ◦CDS View Enhancements •DCL ◦CDS Roles ◦CDS Access Policies In addition to the language elements show here, CDS source code…
Basic CDS View Creation Open HANA Studio. Goto ABAP perspective. Open the project, Navigate to the package. Right click on the package & select New->Other ABAP Repository Object. Expand Code Data Services & select DDL Source and finally select…
Create a CDS view and we have the view type as ‘BASIC’ view To publish this as oData, add the annotation as: @OData.publish: true @AbapCatalog.sqlViewName: ‘ZFLIGHT_VW’ @AbapCatalog.compiler.compareFilter: true @AccessControl.authorizationCheck: #NOT…
Aggregate expression in CDS View An aggregate expression calculates a single value from an operand operand by calling an aggregate function from multiple rows of a results set. They need Group By clause to aggregate values from multiple rows and the…
Explicit Name List use in CDS We create a simple CDS View like below. @AbapCatalog.sqlViewName: ‘ZSFLIGHT_EXP’ @AbapCatalog.compiler.compareFilter: true @AccessControl.authorizationCheck: #NOT_REQUIRED @EndUserText.label: ‘Flight Information’ @VDM.v…
