How To Fix E2182 - Partial foreign key selected (select only one alternative)

SAP Error Message - Details

• Message type: E = Error

• Message class: E2 - DE Data Dictionary

• Message number: 182

• Message text: Partial foreign key selected (select only one alternative)

What causes this issue?

You created a foreign key field and also marked the foreign key as a
partial foreign key by setting the <LS>Generic</> flag.
For partial foreign keys, the fields marked as generic are removed from
the allocation to the key fields of the check table. The check is then
only for the remaining fields.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Remove the entries for the foreign key field in the <LS>For.key table
</> or <LS>Foreign key field</> column or reset the <LS>Generic</>
flag.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message E2182 - Partial foreign key selected (select only one alternative) ?

  The SAP error message E2182, which states "Partial foreign key selected (select only one alternative)," typically occurs in the context of database operations where a foreign key relationship is expected. This error indicates that the system has detected that multiple foreign key alternatives are being selected, which is not allowed in the context of the operation being performed.
  Cause:
  The error is usually caused by one of the following scenarios:
  
  Multiple Foreign Key Relationships: The database table has multiple foreign key relationships defined, and the query or operation is ambiguous about which foreign key to use.
  Incorrect Join Conditions: When performing a join operation, if the join conditions do not clearly specify which foreign key to use, the system may not be able to determine the correct relationship.
  Data Model Issues: There may be issues in the data model where the foreign key relationships are not properly defined or are conflicting.
  
  Solution:
  To resolve the E2182 error, you can take the following steps:
  
  Review the Query: Check the SQL query or the data operation that is causing the error. Ensure that it specifies only one foreign key relationship clearly.
  Modify Join Conditions: If you are using joins, make sure that the join conditions are explicit and do not lead to ambiguity. Specify the foreign key explicitly in the join clause.
  Check Data Model: Review the data model to ensure that foreign key relationships are correctly defined and that there are no conflicting relationships.
  Use Aliases: If necessary, use table aliases in your SQL queries to clarify which table and foreign key you are referring to.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance related to the tables and relationships you are working with.
  
  Related Information:
  
  Foreign Key Constraints: Understanding how foreign key constraints work in SAP and the underlying database can help in troubleshooting this error.
  Database Design: Familiarity with the database schema and relationships can provide insights into why the error is occurring.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message, as there may be specific fixes or workarounds provided by SAP.
  
  By following these steps, you should be able to identify the cause of the E2182 error and implement a solution to resolve it.