发布时间：2020-02-07 13:09:29

# Caution(2) Avoid to create too many extension fields which might have negative impact on system performance.As I mentioned in this link, the extension field generation is done in ASYNCHRONOUS way - technically speaking, it is finished in a background job automatically scheduled and relea.........【阅读全文】

发布时间：2020-02-07 12:21:33

When using the following ABAP code, it does not work:data: lt_table TYPE TABLE OF I_Product.```Simply because the extension field is not enabled for I_PRODUCT.(1). select your extension field.(3). Click "Enable Usage" button:Once done, it works now:为什么之后我们 SEL.........【阅读全文】

发布时间：2020-02-07 11:36:27

(2) extension include view: developed by SAP, for example E_PRODUCT. There are central guideline defined for this kind of view.After you create extension fields, the field will not be appended to extension include view,(Nevertheless you can still see extension field visible in unde.........【阅读全文】

发布时间：2020-02-07 10:50:07

For example， EPRODUCT is extended automatically as well:In order to get a complete list of extension flow, you have to use query on table DD03L:To summarize:(2) any DDIC object which has below structure included will automatically be extended as well:And how I know the include .........【阅读全文】

发布时间：2020-02-07 09:56:03

You might already have read lots of document regarding CDS extensibility, let me use a real example to demonstrate.According to guideline we have already gone through, every extensible CDS view must define an extension include view. In S4 product related topic, it is E_PRODUCT, the view you ar.........【阅读全文】