How To Fix DD_CHK_COMPLEXITY202 - Number of joined tables in CDS view &1 is &2. Reduce number of tables

SAP Error Message - Details

• Message type: E = Error

• Message class: DD_CHK_COMPLEXITY - Messages of CDS complexity check

• Message number: 202

• Message text: Number of joined tables in CDS view &1 is &2. Reduce number of tables

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DD_CHK_COMPLEXITY202 - Number of joined tables in CDS view &1 is &2. Reduce number of tables ?

  The SAP error message DD_CHK_COMPLEXITY202 indicates that a CDS (Core Data Services) view has exceeded the maximum number of tables that can be joined. This is a complexity check that SAP performs to ensure that the performance of the CDS view remains optimal. The error message specifies the name of the CDS view and the number of tables that are currently being joined.
  Cause:
  The primary cause of this error is that the CDS view is attempting to join too many tables, which can lead to performance issues, increased complexity, and potential timeouts during execution. SAP has set a limit on the number of tables that can be joined in a single CDS view to maintain performance and manageability.
  Solution:
  To resolve this error, you can consider the following approaches:
  
  
  Reduce the Number of Joins:
  
  Analyze the CDS view to determine if all the joined tables are necessary. Remove any unnecessary joins that do not contribute to the final output.
  If certain fields from a table are not required, consider excluding that table from the join.
  
  
  
  Create Intermediate Views:
  
  Break down the complex CDS view into multiple simpler views. You can create intermediate CDS views that aggregate or filter data from the original tables and then join these intermediate views in a final CDS view.
  This approach not only reduces the number of joins in a single view but also enhances reusability.
  
  
  
  Use Associations:
  
  Instead of using explicit joins, consider using associations in your CDS view. Associations allow you to define relationships between entities without physically joining them, which can help reduce complexity.
  
  
  
  Optimize Data Model:
  
  Review the data model to see if it can be optimized. Sometimes, denormalizing certain tables or creating summary tables can help reduce the number of joins needed.
  
  
  
  Check for Redundant Joins:
  
  Ensure that there are no redundant joins in the view. Sometimes, joins can be combined or simplified.
  
  
  
  Consult Documentation:
  
  Refer to the SAP documentation for any specific guidelines or limitations regarding the number of joins in CDS views.
  
  
  
  Related Information:
  
  Performance Considerations: Keep in mind that while reducing the number of joins can help resolve the error, it is also essential to consider the performance implications of the changes you make.
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or updates regarding this error message.
  CDS View Annotations: Familiarize yourself with CDS view annotations that can help improve performance and manage complexity.
  
  By following these steps, you should be able to resolve the DD_CHK_COMPLEXITY202 error and optimize your CDS view for better performance.