How To Fix SDDL_PARSER_MSG361 - $$projection is not supported in view cache definitions

SAP Error Message - Details

• Message type: E = Error

• Message class: SDDL_PARSER_MSG - Message Class for DDL Parser

• Message number: 361

• Message text: $$projection is not supported in view cache definitions

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SDDL_PARSER_MSG361 - $$projection is not supported in view cache definitions ?

  The SAP error message SDDL_PARSER_MSG361 with the description $$projection is not supported in view cache definitions typically occurs in the context of SAP HANA or when working with SAP's data modeling tools, particularly when defining views in the SAP HANA database.
  Cause:
  This error arises when you attempt to use a projection in a view cache definition. In SAP HANA, a projection is a way to define a subset of columns from a table or view. However, certain types of views, especially those that are cached, do not support the use of projections. This limitation is in place because caching mechanisms require a stable and predictable structure, which projections can disrupt.
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Review the View Definition: Check the definition of the view where the error is occurring. Look for any use of projections ($$projection) in the view cache definition.
  
  
  Remove Projections: If you find that projections are being used, consider removing them from the view definition. Instead, define the view using the full set of columns or use alternative methods to achieve the desired output without projections.
  
  
  Use Alternative Views: If you need to work with a subset of columns, consider creating a separate view that does not rely on caching or that can be used without projections.
  
  
  Check Documentation: Refer to the SAP HANA documentation or the specific version of the SAP system you are using for any updates or changes regarding view definitions and caching mechanisms.
  
  
  Testing: After making changes, test the view to ensure that it functions correctly without the projections and that the error no longer appears.
  
  
  Related Information:
  
  SAP HANA Documentation: Always refer to the official SAP HANA documentation for the most accurate and detailed information regarding view definitions and caching.
  SAP Community: Engage with the SAP Community forums where other users may have encountered similar issues and can provide insights or solutions.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional context or solutions.
  
  By following these steps, you should be able to resolve the error and successfully define your views in SAP HANA.