How To Fix DI791 - Secondary table & refers to itself

SAP Error Message - Details

• Message type: E = Error

• Message class: DI - Dictionary messages: Indexes

• Message number: 791

• Message text: Secondary table & refers to itself

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.
For the secondary table named, this itself was specified as preceeding
table.

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 DI791 - Secondary table & refers to itself ?

  The SAP error message DI791, which states "Secondary table & refers to itself," typically occurs in the context of data dictionary definitions, particularly when defining secondary indexes or relationships between tables in the ABAP Dictionary (SE11).
  Cause:
  This error arises when a secondary table (often a database table) is defined in such a way that it references itself, creating a circular reference. This can happen if:
  
  A secondary index is defined on a table that includes a field that points back to the same table.
  There is a misconfiguration in the table relationships or foreign key definitions.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Table Definitions: 
  
  Go to transaction SE11 and check the definition of the table that is causing the error.
  Look for any secondary indexes or foreign key relationships that might be incorrectly defined.
  
  
  
  Review Secondary Indexes:
  
  If you have defined a secondary index, ensure that it does not reference the same table in a way that creates a circular reference.
  Modify the index definition to remove the self-reference.
  
  
  
  Foreign Key Relationships:
  
  Check if there are any foreign key relationships that point back to the same table. If so, consider whether this relationship is necessary or if it can be restructured.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help resources for guidelines on defining secondary tables and indexes to ensure compliance with best practices.
  
  
  
  Testing:
  
  After making changes, activate the table and test to ensure that the error no longer occurs.
  
  
  
  Related Information:
  
  Transaction Codes: SE11 (Data Dictionary), SE14 (Database Utility), SE80 (Object Navigator).
  SAP Notes: Check SAP Notes for any specific issues related to your version of SAP that might provide additional context or solutions.
  ABAP Dictionary: Understanding the structure and relationships in the ABAP Dictionary is crucial for managing tables and indexes effectively.
  
  If the issue persists after following these steps, consider reaching out to your SAP Basis or development team for further assistance, as they may have more insights into the specific configurations of your SAP environment.