How To Fix SDDL_PARSER_MSG464 - JOIN type cannot be specified in projection views

SAP Error Message - Details

• Message type: E = Error

• Message class: SDDL_PARSER_MSG - Message Class for DDL Parser

• Message number: 464

• Message text: JOIN type cannot be specified 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_MSG464 - JOIN type cannot be specified in projection views ?

  The SAP error message SDDL_PARSER_MSG464 indicates that there is an issue with the definition of a projection view in the SAP system. Specifically, the error states that a "JOIN type cannot be specified in projection views." This typically occurs when you are trying to create or modify a projection view in the SAP HANA database and have incorrectly specified a join type.
  Cause:
  The root cause of this error is that projection views in SAP HANA are designed to represent a subset of data from one or more tables without the need for complex join operations. Unlike other types of views (like calculation views), projection views are meant to be simple and do not support the specification of join types. If you attempt to define a join within a projection view, the system will throw this error.
  Solution:
  To resolve this error, you should consider the following steps:
  
  
  Review the View Definition: Check the definition of your projection view. Ensure that you are not trying to include any join operations. Projection views should only include direct references to tables or other views without any join conditions.
  
  
  Use Calculation Views: If your requirement involves joining multiple tables or views, consider using a calculation view instead of a projection view. Calculation views allow for more complex data modeling, including joins, unions, and aggregations.
  
  
  Modify the Data Model: If you need to keep the projection view, you may need to redesign your data model to avoid the need for joins. This could involve denormalizing your data or creating additional projection views that can be used in a calculation view.
  
  
  Check Documentation: Refer to the SAP HANA documentation for more details on the limitations and capabilities of projection views and calculation views. This can provide insights into how to structure your views correctly.
  
  
  Related Information:
  
  Projection Views: These are used to select specific columns from a single table or view without any transformation or aggregation.
  Calculation Views: These are more flexible and can include joins, unions, and aggregations, making them suitable for complex data modeling scenarios.
  SAP HANA Studio: Use the SAP HANA Studio or SAP Web IDE to visually design and validate your views, which can help prevent such errors during the design phase.
  
  By following these guidelines, you should be able to resolve the error and successfully create the necessary views in your SAP HANA environment.