How To Fix DT304 - Foreign key &-& (More foreign key fields than check table fields)

SAP Error Message - Details

• Message type: E = Error

• Message class: DT - Table activation (incl. indexes)

• Message number: 304

• Message text: Foreign key &-& (More foreign key fields than check table fields)

What causes this issue?

The number of key fields in the check table is less than the number
of foreign key fields defined for the foreign key.

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?

Check the definition of the foreign key and of the check table. The
superfluous foreign key fields are deleted during activation.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DT304 - Foreign key &-& (More foreign key fields than check table fields) ?

  The SAP error message DT304 indicates that there is a mismatch between the number of foreign key fields defined in a table and the number of fields in the corresponding check table. This error typically arises during the definition of foreign key relationships in the Data Dictionary (DDIC) of SAP.
  Cause:
  The error occurs when:
  
  The foreign key relationship is defined with more fields than are present in the check table.
  The foreign key fields in the referencing table do not match the number of fields in the referenced check table.
  
  Solution:
  To resolve the DT304 error, you can follow these steps:
  
  
  Check Foreign Key Definition:
  
  Go to the Data Dictionary (transaction SE11).
  Locate the table that is causing the error.
  Check the foreign key relationship defined for that table.
  
  
  
  Verify Check Table:
  
  Identify the check table that the foreign key is referencing.
  Open the check table in SE11 and verify the number of fields it contains.
  
  
  
  Adjust Foreign Key Fields:
  
  If the foreign key definition has more fields than the check table, you need to either:
  
  Remove the extra fields from the foreign key definition.
  Add the necessary fields to the check table if they are required for the relationship.
  
  
  
  
  
  Consistency Check:
  
  After making the necessary adjustments, perform a consistency check on the table using transaction SE11 or SE14 to ensure that there are no further issues.
  
  
  
  Activate Changes:
  
  Once the adjustments are made, activate the table and the foreign key relationship to ensure that the changes take effect.
  
  
  
  Related Information:
  
  Foreign Key Relationships: These are used to enforce referential integrity between tables in the database. A foreign key in one table points to a primary key in another table.
  Data Dictionary (DDIC): This is the central repository in SAP where all the metadata about the database objects is stored.
  Transaction Codes:
  
  SE11: Data Dictionary - to view and edit tables, views, data elements, domains, etc.
  SE14: Database Utility - to perform database-related operations, including consistency checks.
  
  
  
  By following these steps, you should be able to resolve the DT304 error and ensure that your foreign key relationships are correctly defined.