{"id":5084,"date":"2025-10-09T13:48:24","date_gmt":"2025-10-09T11:48:24","guid":{"rendered":"https:\/\/www.clavis.biz\/?page_id=5084"},"modified":"2025-10-13T11:04:12","modified_gmt":"2025-10-13T09:04:12","slug":"cds-views-ddic-entity","status":"publish","type":"page","link":"https:\/\/www.clavis.biz\/en\/sap-technologies\/s-4-hana-programming-model\/cds-views-ddic-entity\/","title":{"rendered":"DDIC-basierte CDS Views and Entity-basierte CDS Views"},"content":{"rendered":"\n<div class=\"wp-block-cover alignfull\" style=\"min-height:320px;aspect-ratio:unset;\"><span aria-hidden=\"true\" class=\"wp-block-cover__background has-nv-site-bg-background-color has-background-dim-100 has-background-dim\"><\/span><div class=\"wp-block-cover__inner-container is-layout-flow wp-block-cover-is-layout-flow\">\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<h2 class=\"wp-block-heading has-text-align-left has-neve-text-color-color has-text-color\">Differences and areas of application.<\/h2>\n\n\n\n<p class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-1c52e7428d39c7049861cab1886c7e46\">CDS Views have fundamentally changed data modeling in SAP HANA and ABAP, because with Core Data Services, data models are defined on the database rather than on the application server. CDS views are converted as database views, so that all data accesses, calculations are performed at database level. There are two main types of CDS views, each with its own advantages and disadvantages, which means they can be used for different purposes.<\/p>\n\n\n\n<div style=\"height:60px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<\/div><\/div>\n<\/div><\/div>\n\n<div class=\"wp-block-cover alignfull\" style=\"min-height:320px;aspect-ratio:unset;\"><span aria-hidden=\"true\" class=\"wp-block-cover__background has-nv-light-bg-background-color has-background-dim-100 has-background-dim\"><\/span><div class=\"wp-block-cover__inner-container is-layout-flow wp-block-cover-is-layout-flow\">\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-left has-neve-text-color-color has-text-color\">How do DDIC-based CDS views and entity-based CDS views differ?<\/h2>\n\n\n\n<h3 class=\"wp-block-heading has-neve-text-color-color has-text-color has-link-color wp-elements-3f9252320eb29739414c3cb1dd7d2bc4\">DDIC-based CDS Views<\/h3>\n\n\n\n<p class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-840d9621c7cf7c6f60fd097ed7e31cb5\">CDS views based on DDIC\u2014the data dictionary in SAP\u2014use existing tables from the database as well as classic ABAP dictionary views.<\/p>\n\n\n\n<p class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-a309582f8dd9a9dd9b12d530f29bcfbe\">Advantages:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-a45a827939e07d408aa26dac269063ef\">Compatibility: Good backward compatibility with existing database objects.<\/li>\n\n\n\n<li class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-c4c07b1d7f1643bbbcbedc2bd5b9d766\">Data integrity: Inheritance of primary\/foreign key relationships.<\/li>\n\n\n\n<li class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-f59ca8897ddf558626e8deed25138c6f\">Stability: Robust and proven data models.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-d4ab7a93e68e4ad93e3110da8306eeda\">Disadvantages:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-96f127ebe2a9d6a1409ea27cf968e8f2\">Less flexible: Limited modern modeling capabilities.<\/li>\n\n\n\n<li class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-5f59691d1999aa7eaabf6756fd1fe7e5\">Performance: may be slower with large amounts of data.<\/li>\n\n\n\n<li class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-f59ca8897ddf558626e8deed25138c6f\">Stability: Robust and proven data models.<\/li>\n<\/ul>\n\n\n\n<div style=\"height:60px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<h3 class=\"wp-block-heading has-neve-text-color-color has-text-color has-link-color wp-elements-6a39375c6778705f854338de842c1591\">Entity-based CDS Views<\/h3>\n\n\n\n<p class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-5f8f333f3824394c80078c301f273544\">Entity-based CDS views are more flexible and are based on so-called \u201centities,\u201d i.e., reusable data structures.<\/p>\n\n\n\n<p class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-a309582f8dd9a9dd9b12d530f29bcfbe\">Advantages:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-ab27cb763bb9ff47f393c561373dade7\">Agility: Quick adaptation to new requirements. <\/li>\n\n\n\n<li class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-3bdf816aae1989a3f88f738eadf044e1\">Advanced modeling: associations, navigation, annotations. <\/li>\n\n\n\n<li class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-e40d2c759332e8b94cbff8816160d44a\">Optimization: Improved performance by executing computationally intensive operations directly on the SAP HANA database (SAP HANA Pushdown).<\/li>\n<\/ul>\n\n\n\n<p class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-d4ab7a93e68e4ad93e3110da8306eeda\">Disadvantages:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-a0545dc8f739fb7f2ede415f72e87efa\">Complexity: Requires deeper knowledge of data modeling. <\/li>\n\n\n\n<li class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-c9fdc881b54dd0b42d4c7bfb91daa33a\">Learning curve: Developers must become accustomed to new concepts<\/li>\n<\/ul>\n\n\n\n<div style=\"height:60px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<\/div><\/div>\n<\/div><\/div>\n\n<div class=\"wp-block-cover alignfull\" style=\"min-height:320px;aspect-ratio:unset;\"><span aria-hidden=\"true\" class=\"wp-block-cover__background has-nv-site-bg-background-color has-background-dim-100 has-background-dim\"><\/span><div class=\"wp-block-cover__inner-container is-layout-flow wp-block-cover-is-layout-flow\">\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<h2 class=\"wp-block-heading has-text-align-left has-neve-text-color-color has-text-color\">When should you use DDIC-based CDS views and when should you use entity-based CDS views?<\/h2>\n\n\n\n<p class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-74f81a6d9490892690ee2c468db67789\">DDIC-based CDS views should be used for projects with a lot of legacy code and\/or when simple data models are sufficient. Another argument in favor of their use is the importance of backward compatibility. <\/p>\n\n\n\n<p class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-c66f6e52162194da30645a6b59262590\">Entity-based CDS views have a clear advantage when agile, complex data models are in use or SAP HANA optimization is crucial.<\/p>\n\n\n\n<div style=\"height:60px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<\/div><\/div>\n<\/div><\/div>\n\n<div class=\"wp-block-cover alignfull has-nv-site-bg-color has-text-color has-link-color wp-elements-dafa78a64e9c7d3f6542dc4b1b986259\" style=\"min-height:320px;aspect-ratio:unset;\"><span aria-hidden=\"true\" class=\"wp-block-cover__background has-neve-text-color-background-color has-background-dim-100 has-background-dim\"><\/span><div class=\"wp-block-cover__inner-container is-layout-flow wp-block-cover-is-layout-flow\">\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<h2 class=\"wp-block-heading has-text-align-left has-nv-site-bg-color has-text-color\">When should you use DDIC-based CDS views and when should you use entity-based CDS views?<\/h2>\n\n\n\n<p class=\"has-nv-site-bg-color has-text-color has-link-color wp-elements-213fc992769ad8b7b2ad06e533160311\">DDIC-based CDS views should be used for projects with a lot of legacy code and\/or when simple data models are sufficient. Another argument in favor of their use is the importance of backward compatibility. <\/p>\n\n\n\n<p class=\"has-nv-site-bg-color has-text-color has-link-color wp-elements-2425e42a1ebaaf530eb83dd7844b83ff\">Entity-based CDS views have a clear advantage when agile, complex data models are in use or SAP HANA optimization is crucial.<\/p>\n\n\n\n<div style=\"height:60px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<\/div><\/div>\n<\/div><\/div>\n\n<div class=\"wp-block-cover alignfull\" style=\"min-height:600px;aspect-ratio:unset;\"><span aria-hidden=\"true\" class=\"wp-block-cover__background has-nv-light-bg-background-color has-background-dim-100 has-background-dim\"><\/span><div class=\"wp-block-cover__inner-container is-layout-flow wp-block-cover-is-layout-flow\">\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<div style=\"height:80px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-columns are-vertically-aligned-center is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\">\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"600\" src=\"https:\/\/www.clavis.biz\/wp-content\/uploads\/2024\/05\/Button-HANA-pixabay-moon-1527501_1920.jpg\" alt=\"Image CDS\" class=\"wp-image-608\" style=\"width:400px\" srcset=\"https:\/\/www.clavis.biz\/wp-content\/uploads\/2024\/05\/Button-HANA-pixabay-moon-1527501_1920.jpg 600w, https:\/\/www.clavis.biz\/wp-content\/uploads\/2024\/05\/Button-HANA-pixabay-moon-1527501_1920-300x300.jpg 300w, https:\/\/www.clavis.biz\/wp-content\/uploads\/2024\/05\/Button-HANA-pixabay-moon-1527501_1920-150x150.jpg 150w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\">\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-left has-neve-text-color-color has-text-color\">Core Data Services (CDS)<\/h2>\n\n\n\n<p class=\"has-text-align-left has-neve-text-color-color has-text-color\" style=\"font-size:17px\">Data modeling with HANA Core Data Services<\/p>\n\n\n\n<div class=\"wp-block-buttons is-horizontal is-content-justification-left is-layout-flex wp-container-core-buttons-is-layout-7e5fce0a wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button is-style-primary\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.clavis.biz\/en\/sap-technologies\/s-4-hana-programming-model\/core-data-services-cds-2\/\">DETAILS<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<div 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https:\/\/www.clavis.biz\/wp-content\/uploads\/2024\/05\/cl_orange_Informationen-150x150.png 150w\" sizes=\"auto, (max-width: 285px) 100vw, 285px\" \/><\/figure>\n<\/div>\n\n\n<div style=\"height:24px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"has-text-align-center has-nv-text-dark-bg-color has-text-color\">Do you have any questions?<br\/>Get in touch with us.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-16018d1d wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button is-style-default\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.clavis.biz\/en\/contact\/\">CONTACT<\/a><\/div>\n<\/div>\n\n\n\n<div style=\"height:80px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":4850,"parent":2750,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"neve_meta_sidebar":"default","neve_meta_container":"","neve_meta_enable_content_width":"on","neve_meta_content_width":100,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"off","neve_meta_reading_time":"","_ti_tpc_template_sync":false,"_ti_tpc_template_id":"","footnotes":""},"class_list":["post-5084","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Core Data Services (CDS)<\/title>\n<meta name=\"description\" content=\"Data modeling with Core Data Services 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