{"id":9666,"date":"2021-01-29T15:53:32","date_gmt":"2021-01-29T14:53:32","guid":{"rendered":"https:\/\/www.rapidviews.io\/blog\/uncategorized\/presentation-des-cds-views"},"modified":"2025-03-28T16:27:19","modified_gmt":"2025-03-28T15:27:19","slug":"cds-views-presentation","status":"publish","type":"post","link":"https:\/\/www.rapidviews.io\/en\/blog\/cds-views\/cds-views-presentation","title":{"rendered":"CDS Views : Definition and presentation"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"9666\" class=\"elementor elementor-9666\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-35bd901b elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"35bd901b\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-5448f5ef\" data-id=\"5448f5ef\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-356201d1 elementor-widget elementor-widget-heading\" data-id=\"356201d1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Introduction<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6207df5a elementor-widget elementor-widget-text-editor\" data-id=\"6207df5a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>With the arrival of<strong> S\/4HANA<\/strong>, <a href=\"https:\/\/www.sap.com\/index.html\">SAP<\/a> has introduced a change, with regard to the <strong>development of business layers from ERP tables<\/strong>. The aim is to be as close as possible to the <a href=\"https:\/\/www.decivision.com\/blog\/sap-hana\/presentation-sap-hana\">database<\/a> in order to get the best performance.<\/p><p>The introduction of <strong>CDS (Core Data Services) Views<\/strong> is an improvement on the ABAP (Data Dictionary) layer. They provide a more advanced and semantically rich data model.<\/p><p>Thanks to <strong>CDS Views<\/strong> one can expose, model, link, aggregate, &#8230; the data present in the database, and thus make it more easily accessible.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4432b57f elementor-widget elementor-widget-heading\" data-id=\"4432b57f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-large\">Getting started with CDS Views<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7c075373 elementor-widget elementor-widget-text-editor\" data-id=\"7c075373\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Technically, CDS is a collection of SAP-specific languages. It is an extension of SQL and at the same time a <strong>data definition language (DDL)<\/strong>,<strong> a data manipulation language (DML) and an authorization control language (DCL).<\/strong> With this, we can create a virtual data model called <strong>VDM (Virtual Data Model).<\/strong><\/p><p>There are three types of views :<\/p><ul><li><strong>Basic :<\/strong> these are used to bring data directly from the physical tables in the database.<\/li><li><strong>Composite :<\/strong> this type of view is used to link basic views together through associations (like SQL joins between views). They are then used by the consumption views.<\/li><li><strong>Consumption :<\/strong> these views allow you to create a specific query from a &#8220;composite&#8221; view. This is the only type of view that can be exposed to the OData or transient service to be consumed for reporting.<\/li><\/ul><p>The features added in the extended SQL of CDS are :<\/p><ul><li><strong>SQL features :<\/strong> calculations, aggregations, UNION, joins and GROUP BY.<\/li><li><strong>Associations :<\/strong> to link several tables and\/or views.<\/li><li><strong>Annotations :<\/strong> allow to define meta-models such as naming, ABAP permissions, view extensibility.<\/li><li><strong>Extensibility :<\/strong> a view can be extended by a client application without modifying it, which makes it reusable and flexible.<\/li><li><strong>ABAP security :<\/strong> CDS uses ABAP authorization objects and transport layers. In addition, security can be defined explicitly with annotations.<\/li><\/ul><p>In all cases, their development goes through Eclipse, through a plugin. This tool is called ADT (ABAP Development Tools).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-76c0f182 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"76c0f182\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-wider\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-3a280045\" data-id=\"3a280045\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-680ee0a8 elementor-widget-divider--view-line_text elementor-widget-divider--element-align-right elementor-widget elementor-widget-divider\" data-id=\"680ee0a8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t\t<span class=\"elementor-divider__text elementor-divider__element\">\n\t\t\t\tStay connected !\t\t\t\t<\/span>\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bbfdeaa elementor-widget elementor-widget-heading\" data-id=\"bbfdeaa\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Subscribe to the Rapid Views Newsletter !<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-25e2e582 elementor-widget elementor-widget-text-editor\" data-id=\"25e2e582\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"color: #ffffff;\">Stay up to date with our latest blog posts, upcoming webinars and news!<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6edfa389 elementor-button-align-stretch elementor-widget elementor-widget-form\" data-id=\"6edfa389\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;button_width&quot;:&quot;20&quot;,&quot;step_next_label&quot;:&quot;Suivant&quot;,&quot;step_previous_label&quot;:&quot;Pr\\u00e9c\\u00e9dent&quot;,&quot;step_type&quot;:&quot;number_text&quot;,&quot;step_icon_shape&quot;:&quot;circle&quot;}\" data-widget_type=\"form.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<form class=\"elementor-form\" method=\"post\" name=\"Inscription Newsletter (EN)\" aria-label=\"Inscription Newsletter (EN)\">\n\t\t\t<input type=\"hidden\" name=\"post_id\" value=\"9666\"\/>\n\t\t\t<input type=\"hidden\" name=\"form_id\" value=\"6edfa389\"\/>\n\t\t\t<input type=\"hidden\" name=\"referer_title\" value=\"CDS Views : Development of management layers in S\/4HANA\" \/>\n\n\t\t\t\t\t\t\t<input type=\"hidden\" name=\"queried_id\" value=\"9666\"\/>\n\t\t\t\n\t\t\t<div class=\"elementor-form-fields-wrapper elementor-labels-\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-email elementor-field-group elementor-column elementor-field-group-email elementor-col-40 elementor-field-required\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-email\" class=\"elementor-field-label elementor-screen-only\">\n\t\t\t\t\t\t\t\tYour e-mail address\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<input size=\"1\" type=\"email\" name=\"form_fields[email]\" id=\"form-field-email\" class=\"elementor-field elementor-size-xs  elementor-field-textual\" placeholder=\"Your e-mail address\" required=\"required\">\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-group elementor-column elementor-field-type-submit elementor-col-20 e-form__buttons\">\n\t\t\t\t\t<button class=\"elementor-button elementor-size-sm\" type=\"submit\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Register<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/button>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/form>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-26deae85 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"26deae85\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-63ae23c3\" data-id=\"63ae23c3\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-19c24a56 elementor-widget elementor-widget-heading\" data-id=\"19c24a56\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-large\">ABAP Development Tool (ADT)<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-daa22bc elementor-widget elementor-widget-text-editor\" data-id=\"daa22bc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>It is a development tool based on Eclipse, which allows you to use the power and flexibility of this tool. It has the following features :<\/p><ul><li>You can connect to multiple ABAP systems simultaneously.<\/li><li>You can recover the session when you log out. This reduces their impact.<\/li><li>Can be developed on both ABAP and non-ABAP platforms.<\/li><\/ul><p>The ADT looks like this :<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fc6aa33 elementor-widget elementor-widget-image\" data-id=\"fc6aa33\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"600\" height=\"337\" src=\"https:\/\/www.rapidviews.io\/wp-content\/uploads\/2021\/01\/interface-abap-development-tool-eng.png\" class=\"attachment-large size-large wp-image-10070\" alt=\"Interface ABAP development tool eng\" srcset=\"https:\/\/www.rapidviews.io\/wp-content\/uploads\/2021\/01\/interface-abap-development-tool-eng.png 600w, https:\/\/www.rapidviews.io\/wp-content\/uploads\/2021\/01\/interface-abap-development-tool-eng-300x169.png 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4e13a26b elementor-widget elementor-widget-text-editor\" data-id=\"4e13a26b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li><strong>Project Exploration View :<\/strong> This view allows the user to explore the various ABAP packages and objects from an ABAP connection<\/li><li><strong>Tree view :<\/strong> this view displays the structure of the object opened in the editing space. It displays the parameters, projections, joins, etc. in a <a href=\"\/en\/blog\/cds-views-en\/hierarchies\">hierarchical manner<\/a>.<\/li><li><strong>Editing space :<\/strong> window where the view is expanded<\/li><li><strong>Perspectives :<\/strong> a configuration of views and editing spaces. Changing the perspective changes the layout of these views and editing spaces.<\/li><li><strong>Objects :<\/strong> open objects in the editing space.<\/li><li><strong>Toolbars<\/strong><\/li><li><strong>Views :<\/strong> screens displaying the functionality of the tool.<\/li><\/ul><p>Below are the steps to <strong>create an ABAP project in Eclipse :<\/strong><\/p><ul><li>Menu Window -&gt; Perspective -&gt; Open Perspective -&gt; Other, change the perspective to ABAP Perspective.<\/li><li>Create a new ABAP Project in File -&gt; New -&gt; ABAP Project.<\/li><li>Choose the system on which you want to develop and enter the login and password.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d344d14 elementor-widget elementor-widget-image\" data-id=\"d344d14\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/www.rapidviews.io\/wp-content\/uploads\/2021\/01\/creation-abap-project.png\" title=\"\" alt=\"\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5a8d44f elementor-widget elementor-widget-image\" data-id=\"5a8d44f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/www.rapidviews.io\/wp-content\/uploads\/2021\/01\/details-creation-projet-abap.png\" title=\"\" alt=\"\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7d71b1d elementor-widget elementor-widget-text-editor\" data-id=\"7d71b1d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Once connected, we can create our first &#8220;View&#8221;.<\/p><ul><li>To <strong>create a view<\/strong>, right-click in the tree, then New -&gt; New Data Definition.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2f9dc4e elementor-widget elementor-widget-image\" data-id=\"2f9dc4e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/www.rapidviews.io\/wp-content\/uploads\/2021\/01\/creation-vue-abap.png\" title=\"\" alt=\"\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-77b4c2a8 elementor-widget elementor-widget-text-editor\" data-id=\"77b4c2a8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"wpb_text_column wpb_content_element vc_custom_1563183622137\"><div class=\"wpb_wrapper\"><ul><li>Choose the transport. The transport in SAP is the tool for<strong> transferring objects from one environment to another.<\/strong><\/li><\/ul><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-637a41b elementor-widget elementor-widget-image\" data-id=\"637a41b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/www.rapidviews.io\/wp-content\/uploads\/2021\/01\/choix-transport-sap.png\" title=\"\" alt=\"\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6894d879 elementor-widget elementor-widget-text-editor\" data-id=\"6894d879\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"wpb_text_column wpb_content_element vc_custom_1563183632307\"><div class=\"wpb_wrapper\"><ul><li>Choose the <strong>view template<\/strong> you wish to create.<\/li><\/ul><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1af65678 elementor-widget elementor-widget-image\" data-id=\"1af65678\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/www.rapidviews.io\/wp-content\/uploads\/2021\/01\/template-vue.png\" title=\"\" alt=\"\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2905e6ee elementor-widget elementor-widget-text-editor\" data-id=\"2905e6ee\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"wpb_text_column wpb_content_element vc_custom_1563183653033\"><div class=\"wpb_wrapper\"><ul><li><strong>Votre vue est cr\u00e9\u00e9e.<\/strong><\/li><\/ul><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-30eb724 elementor-widget elementor-widget-heading\" data-id=\"30eb724\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-large\">Analysis of the DDL of a view<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7deb15a elementor-widget elementor-widget-image\" data-id=\"7deb15a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/www.rapidviews.io\/wp-content\/uploads\/2021\/01\/analyse-dll-vue.png\" title=\"\" alt=\"\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-16fd858b elementor-widget elementor-widget-text-editor\" data-id=\"16fd858b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>CDS Views<\/strong> are defined in a source DDL and at activation time it generates two objects :<\/p><ul><li><strong>SQL View :<\/strong> this is an invisible object in the ABAP dictionary that cannot be modified.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-21ddeca elementor-widget elementor-widget-image\" data-id=\"21ddeca\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/www.rapidviews.io\/wp-content\/uploads\/2021\/01\/sql-view.png\" title=\"\" alt=\"\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e193ce8 elementor-widget elementor-widget-text-editor\" data-id=\"e193ce8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"wpb_text_column wpb_content_element  vc_custom_1563201012445\"><div class=\"wpb_wrapper\"><ul><li><strong>CDS View<\/strong><\/li><\/ul><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-51413b2e elementor-widget elementor-widget-image\" data-id=\"51413b2e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/www.rapidviews.io\/wp-content\/uploads\/2021\/01\/cds-view.png\" title=\"\" alt=\"\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bcb3e0b elementor-widget elementor-widget-text-editor\" data-id=\"bcb3e0b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The simplest form of CDS View is the projection, i.e. a selection of fields from a single table. The name of a view specified in @ABAPCatalog.sqlViewName must be different from the name of the CDS entity and their names cannot exceed sixteen characters.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0775f41 elementor-widget elementor-widget-heading\" data-id=\"0775f41\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-large\">DDL features<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d57111f elementor-widget elementor-widget-text-editor\" data-id=\"d57111f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>As presented earlier, <strong>CDS views<\/strong> have extensive SQL functionality (calculations, GROUP BY&#8230;) but also the possibility to add associations, annotations and extensibility.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-61e568dd elementor-widget elementor-widget-heading\" data-id=\"61e568dd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-medium\">Views with a join<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e3ae08c elementor-widget elementor-widget-image\" data-id=\"e3ae08c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/www.rapidviews.io\/wp-content\/uploads\/2021\/01\/vue-avec-jointure.png\" title=\"\" alt=\"\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bf47a9c elementor-widget elementor-widget-heading\" data-id=\"bf47a9c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-medium\">Views with aggregations\n<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-57a3db78 elementor-widget elementor-widget-text-editor\" data-id=\"57a3db78\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"wpb_text_column wpb_content_element vc_custom_1563183945385\"><div class=\"wpb_wrapper\"><p>The <strong>views with aggregations<\/strong> include the traditional functions such as MIN, MAX, SUM, AVG, COUNT and COUNT (DISTINCT). They can be used in the selection list or the HAVING.<\/p><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1606d38 elementor-widget elementor-widget-image\" data-id=\"1606d38\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/www.rapidviews.io\/wp-content\/uploads\/2021\/01\/vue-avec-agregation.png\" title=\"\" alt=\"\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-024074e elementor-widget elementor-widget-heading\" data-id=\"024074e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-medium\">Views with unions<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0efa557 elementor-widget elementor-widget-text-editor\" data-id=\"0efa557\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"wpb_text_column wpb_content_element vc_custom_1563183945385\"><div class=\"wpb_wrapper\"><p>The two result sets of a DDL are merged. Any duplicate rows between the two tables are removed from the final result.<\/p><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5209d70 elementor-widget elementor-widget-image\" data-id=\"5209d70\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/www.rapidviews.io\/wp-content\/uploads\/2021\/01\/vue-avec-unions.png\" title=\"\" alt=\"\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f494502 elementor-widget elementor-widget-heading\" data-id=\"f494502\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-medium\">Views with associations<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2192d95 elementor-widget elementor-widget-text-editor\" data-id=\"2192d95\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"wpb_text_column wpb_content_element vc_custom_1563183945385\"><div class=\"wpb_wrapper\"><p><strong>Associations<\/strong> are used to link the different views. They give semantic information about the relationships between tables, such as cardinalities. They have a particular syntax but the SQL generated is in the form of classic joins.<\/p><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2cd9a47 elementor-widget elementor-widget-image\" data-id=\"2cd9a47\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/www.rapidviews.io\/wp-content\/uploads\/2021\/01\/vue-avec-associations.png\" title=\"\" alt=\"\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5b777b5 elementor-widget elementor-widget-heading\" data-id=\"5b777b5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-medium\">Views with parameters<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c3ef242 elementor-widget elementor-widget-text-editor\" data-id=\"c3ef242\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"wpb_text_column wpb_content_element vc_custom_1563183945385\"><div class=\"wpb_wrapper\"><p>Sometimes users need to<strong> enter parameters to influence the results according to business needs.<\/strong> This is the case, for example, if the user wants to filter the results on a language, or if they want to modify the results of a calculation by entering the percentage of a discount coupon. They are defined through the WITH PARAMETERS clause. When the view is executed, the user will be asked for these parameters.<\/p><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d7cd763 elementor-widget elementor-widget-image\" data-id=\"d7cd763\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/www.rapidviews.io\/wp-content\/uploads\/2021\/01\/vue-avec-parametres.png\" title=\"\" alt=\"\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-c96620c elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"c96620c\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-4668d62\" data-id=\"4668d62\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-a081d7b elementor-widget elementor-widget-heading\" data-id=\"a081d7b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-large\">Expert's conclusion<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1209f0f elementor-widget elementor-widget-text-editor\" data-id=\"1209f0f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"wpb_text_column wpb_content_element vc_custom_1563183945385\"><div class=\"wpb_wrapper\"><p><strong>CDS Views add a semantic layer to SAP data<\/strong> that makes it more meaningful to business users. From this, users will be able to build operational datasets and create dashboards with<strong> real time data directly from the ERP<\/strong> with third party tools.<\/p><p>In addition, the features provided in CDS Views allow the <strong>construction of complex views involving several tables or other views<\/strong>. It is therefore possible to create semantically rich views that are as faithful as possible to business requirements and encapsulate all business rules.<\/p><p>Thanks to their integration in the ABAP layer, very useful functionalities such as security recovery allow to build a reliable and secure model.<\/p><p>However, building these views<strong> requires CDS development skills.<\/strong> SAP opted for the flexibility and ease of use of Eclipse to make the development of these views <strong>as smooth as possible<\/strong>.<\/p><p>Thanks to Steven VERBRAEKEN for his help in writing this article<\/p><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>With the arrival of S\/4HANA, SAP has introduced a change, with regard to the development of business layers from ERP tables. The aim is to be as close as possible to the database in order to have the best performance&#8230;<\/p>\n","protected":false},"author":7,"featured_media":59606,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[594],"tags":[],"class_list":["post-9666","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cds-views"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.5 (Yoast SEO v27.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>CDS Views : Development of management layers in S\/4HANA<\/title>\n<meta name=\"description\" content=\"CDS Views are an improvement on the ABAP layer. 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