How To Fix DDLS520 - In the object hierarchy, there is at least one pooling/cluster table

SAP Error Message - Details

• Message type: E = Error

• Message class: DDLS - For DDL source handling

• Message number: 520

• Message text: In the object hierarchy, there is at least one pooling/cluster table

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DDLS520 - In the object hierarchy, there is at least one pooling/cluster table ?

  The SAP error message DDLS520 indicates that there is at least one pooling or cluster table in the object hierarchy you are trying to work with. This error typically arises when you are attempting to perform certain operations, such as generating a Data Definition Language (DDL) statement or creating a database object, that are not supported for pooled or cluster tables.
  Cause:
  
  Pooled and Cluster Tables: In SAP, pooled and cluster tables are special types of database tables that are used to optimize storage and performance. They are not directly supported in certain database operations, especially when working with modern database systems that do not support these table types.
  Object Hierarchy: The error suggests that the object you are trying to manipulate includes one or more pooled or cluster tables, which are not compatible with the operation you are attempting.
  
  Solution:
  
  Identify the Tables: Check the object hierarchy to identify which tables are pooled or cluster tables. You can do this by examining the table definitions in the Data Dictionary (transaction SE11).
  Modify the Object: If possible, modify the object hierarchy to exclude the pooled or cluster tables. This may involve redesigning the data model or using alternative table types (e.g., transparent tables).
  Use Alternative Approaches: If you need to work with the data in pooled or cluster tables, consider using ABAP programs or function modules that can handle these tables directly, rather than trying to generate DDL statements.
  Consult Documentation: Review SAP documentation or consult with your SAP Basis team for guidance on how to handle pooled and cluster tables in your specific scenario.
  
  Related Information:
  
  Pooled Tables: These are tables that store data for multiple logical tables in a single physical table. They are used to save space and improve performance.
  Cluster Tables: These tables store data for multiple logical tables in a single physical table, similar to pooled tables, but they are designed to handle more complex relationships.
  Database Compatibility: If you are migrating to a different database system (e.g., HANA), be aware that pooled and cluster tables may not be supported, and you may need to convert them to transparent tables.
  SAP Notes: Check SAP Notes for any specific guidance or updates related to this error message, as SAP frequently updates its software and documentation.
  
  By following these steps, you should be able to resolve the DDLS520 error and proceed with your database operations.