What is RAP unmanaged query in SAP (BC-ESI-RAP - RESTful ABAP Programming Model)?

SAP Term: RAP unmanaged query

• Component: BC-ESI-RAP

• Component Name: RESTful ABAP Programming Model

• Description: An implementation type of the RAP query for which parts of the RAP query engine must be implemented in an ABAP class that is referenced in a CDS custom entity.

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• Key Concepts: 
  RAP Unmanaged Query is a feature of the BC-ESI-RAP RESTful ABAP Programming Model. It allows developers to create and execute queries against an SAP system without having to write any ABAP code. The query is written in a SQL-like language and can be used to retrieve data from multiple tables in the system. 
  
  How to use it: 
  To use RAP Unmanaged Query, developers must first create a query using the SQL-like language. This query can then be executed against the SAP system using the BC-ESI-RAP RESTful ABAP Programming Model. The results of the query can then be used in other applications or processes. 
  
  Tips & Tricks: 
  When creating a query, it is important to ensure that all of the necessary tables are included in the query. This will ensure that all of the necessary data is retrieved from the SAP system. Additionally, it is important to test the query before executing it against the system to ensure that it returns the expected results. 
  
  Related Information: 
  For more information on RAP Unmanaged Query, please refer to the official SAP documentation at https://help.sap.com/viewer/product/BC-ESI-RAP/latest/en-US.