How To Fix DI792 - Secondary table & bound to incorrect foreign key type using join

SAP Error Message - Details

• Message type: E = Error

• Message class: DI - Dictionary messages: Indexes

• Message number: 792

• Message text: Secondary table & bound to incorrect foreign key type using join

What causes this issue?

Each secondary table of a lock object must be connected to a base table
above it in the hierarchy with a join condition. This join condition
must be implemented via a foreign key. This foreign key must have the
secondary table as foreign key table and the base table above it in the
hierarchy as check table.
The join condition for the secondary table named is the other way
around: the secondary table is the check table and the base table
higher in the hierarchy is the foreign key table of the relevant
foreign key.

System Response

The action is cancelled.

How to fix this error?

Build the hierarchy of the lock object correctly. Observe the
<DS:TX.DDDOK_ENQU_REQUIREMENTS>requirements for the join conditions of
a lock object</>.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DI792 - Secondary table & bound to incorrect foreign key type using join ?

  The SAP error message DI792 indicates that there is a mismatch in the foreign key relationship between tables in a join operation. This typically occurs when a secondary table is bound to a foreign key that does not match the expected data type or structure. Here’s a breakdown of the cause, potential solutions, and related information for this error:
  Cause:
  
  
  Data Type Mismatch: The foreign key in the secondary table may have a different data type than the primary key it is supposed to reference. For example, if the primary key is an integer and the foreign key is a string, this will lead to the error.
  
  
  Incorrect Join Conditions: The join condition may not be correctly defined, leading to an incorrect binding of the secondary table to the primary table.
  
  
  Modeling Issues: In the data model, the relationships between tables may not be correctly defined, leading to inconsistencies in how the tables are joined.
  
  
  Database Schema Changes: If there have been recent changes to the database schema (e.g., changes in data types or table structures), this could lead to the error if the application has not been updated accordingly.
  
  
  Solution:
  
  
  Check Data Types: Verify that the data types of the foreign key in the secondary table and the primary key in the primary table match. If they do not, you may need to adjust the data types in the database or modify the join condition.
  
  
  Review Join Conditions: Ensure that the join conditions in your query or data model are correctly defined. Make sure that you are joining on the correct fields and that the relationships are properly established.
  
  
  Update Data Model: If there are discrepancies in the data model, update it to reflect the correct relationships and data types. This may involve modifying the data model in your SAP application or adjusting the underlying database schema.
  
  
  Test Changes: After making any changes, test the query or data model to ensure that the error is resolved and that the data is being retrieved correctly.
  
  
  Consult Documentation: Refer to SAP documentation or community forums for additional guidance on handling this specific error, as there may be nuances based on the version of SAP you are using.
  
  
  Related Information:
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions to common problems.
  
  
  Data Dictionary: Use the Data Dictionary (SE11) in SAP to examine the structure of the tables involved in the join. This can help you identify any discrepancies in data types or relationships.
  
  
  Debugging Tools: Utilize debugging tools within SAP to trace the execution of the query or data model and identify where the error is occurring.
  
  
  Community Forums: Engage with SAP community forums or user groups where you can ask questions and share experiences with other users who may have encountered similar issues.
  
  
  By following these steps, you should be able to identify the cause of the DI792 error and implement a solution to resolve it.