SAP CRM 产品主数据搜索alternative ID type下拉菜单的渲染逻辑

Created by Jerry Wang, last modified on Oct 03, 2016

When you choose "Alternative ID Type" in search Criteria view, the corresponding ID type will be displayed as drop down list automatically. How is this behavior implemented?

The drop down list field is built based on data element COMT_ALTID_TYPE, which is assigned with a search help:

The type of search help is: Display values immediately:

However, for category id, it is rendered as a popup dialog:

The reason:

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