How To Fix SDDL_PARSER_MSG355 - Associations cannot be combined with SELECT *

SAP Error Message - Details

• Message type: E = Error

• Message class: SDDL_PARSER_MSG - Message Class for DDL Parser

• Message number: 355

• Message text: Associations cannot be combined with SELECT *

What causes this issue?

An association was defined despite SELECT * being used. This association
is exposed and is part of the entity interface but cannot be tracked.

System Response

If the association is accessed in another CDS view or in ABAP Open,
a syntax error is produced.

How to fix this error?

Remove the association definition or list all elements of the data
source explicitly in the select list.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SDDL_PARSER_MSG355 - Associations cannot be combined with SELECT * ?

  The SAP error message SDDL_PARSER_MSG355 indicates that there is an issue with the way you are trying to use associations in your query. Specifically, the error states that associations cannot be combined with SELECT *. This typically occurs in the context of using Open SQL or ABAP queries where you are trying to retrieve data from multiple tables using associations.
  Cause
  The root cause of this error is that when you use SELECT *, the system expects to retrieve all fields from a single table or view. However, when you introduce associations (which are used to join related tables), the system cannot determine which fields to select from the associated tables, leading to ambiguity.
  Solution
  To resolve this error, you need to explicitly specify the fields you want to select from the main table and any associated tables instead of using SELECT *. Here’s how you can do it:
  
  
  Specify Fields Explicitly: Instead of using SELECT *, list the specific fields you want to retrieve from the main table and any associated tables.
  Example:
  SELECT field1, field2, associated_table-field3
    FROM main_table
    INNER JOIN associated_table ON main_table.key = associated_table.key
    WHERE conditions.
  
  
  Use Aliases: If you are selecting fields from multiple tables, consider using aliases to avoid confusion and ensure clarity in your query.
  
  
  Check Associations: Ensure that the associations you are using are correctly defined in your data model and that they are appropriate for the query you are trying to execute.
  
  
  Related Information
  
  Open SQL Documentation: Review the SAP documentation on Open SQL to understand how to properly use associations and joins in your queries.
  ABAP Development Guidelines: Familiarize yourself with best practices for writing efficient and clear ABAP code, especially when dealing with database operations.
  Debugging: If you continue to encounter issues, consider using the ABAP debugger to step through your code and examine the SQL being generated.
  
  By following these steps, you should be able to resolve the SDDL_PARSER_MSG355 error and successfully execute your query.