How To Fix SDDL_PARSER_MSG508 - Filters cannot raise the maximum cardinality in projection views

SAP Error Message - Details

• Message type: E = Error

• Message class: SDDL_PARSER_MSG - Message Class for DDL Parser

• Message number: 508

• Message text: Filters cannot raise the maximum cardinality in projection views

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SDDL_PARSER_MSG508 - Filters cannot raise the maximum cardinality in projection views ?

  The SAP error message SDDL_PARSER_MSG508 indicates that there is an issue with the cardinality of filters in projection views. This error typically arises when the filters applied in a projection view are attempting to increase the maximum cardinality of the result set, which is not allowed.
  Cause:
  
  Cardinality Constraints: In SAP HANA, projection views have cardinality constraints that define the maximum number of records that can be returned. If a filter is applied that could potentially increase the number of records beyond this limit, the error will occur.
  Incorrect Filter Logic: The logic used in the filters may be incorrectly set up, leading to a situation where the expected output exceeds the defined cardinality.
  Data Model Design: The underlying data model may not be designed correctly, leading to conflicts in how data is projected and filtered.
  
  Solution:
  
  Review Filters: Check the filters applied in the projection view. Ensure that they are not set up in a way that would increase the cardinality beyond the defined limits.
  Adjust Cardinality: If necessary, adjust the cardinality settings in the data model to accommodate the expected results. This may involve changing the design of the view or the underlying tables.
  Refactor the View: Consider refactoring the projection view to ensure that it adheres to the cardinality constraints. This may involve breaking down complex filters or restructuring the view.
  Test with Sample Data: Test the projection view with a smaller dataset to see if the error persists. This can help isolate the issue and determine if it is data-related.
  Consult Documentation: Refer to SAP HANA documentation for guidelines on cardinality and projection views to ensure compliance with best practices.
  
  Related Information:
  
  SAP HANA Documentation: Review the official SAP HANA documentation for detailed information on cardinality, projection views, and best practices for data modeling.
  SAP Community: Engage with the SAP Community forums to see if others have encountered similar issues and to share solutions.
  Performance Considerations: Be aware that improper handling of cardinality can lead to performance issues, so it’s essential to optimize views and filters accordingly.
  
  By addressing the filters and ensuring that they comply with cardinality constraints, you should be able to resolve the SDDL_PARSER_MSG508 error.