How To Fix TG455 - Table & has more than 749 fields; conversion not possible in all DBMSs

SAP Error Message - Details

• Message type: E = Error

• Message class: TG - Messages for Upgrade Repository Switch

• Message number: 455

• Message text: Table & has more than 749 fields; conversion not possible in all DBMSs

What causes this issue?

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

INCLUDE 'DDFD_DEL' OBJECT DOKU ID TX
The table contains more than 749 fields. Therefore avoid a conversion.
The conversion is not possible for certain database systems.

System Response

During the conversion, the data contained in these fields is lost.

How to fix this error?

INCLUDE 'DDFD_SOLUTION' OBJECT DOKU ID TX

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message TG455 - Table & has more than 749 fields; conversion not possible in all DBMSs ?

  The SAP error message TG455 indicates that a specific database table has more than 749 fields, which can lead to issues with data conversion in certain Database Management Systems (DBMS). This limitation arises because some DBMSs have restrictions on the number of fields that can be handled in a single table, particularly when it comes to data conversion or migration processes.
  Cause:
  
  Exceeding Field Limit: The primary cause of this error is that the table in question has more than 749 fields. This can happen due to the design of the table, where multiple attributes or characteristics are stored in a single table.
  Database Compatibility: Different DBMSs have varying limitations on the number of fields per table. Some may not support tables with a high number of fields, leading to conversion issues.
  
  Solution:
  
  
  Table Redesign: Consider redesigning the table to reduce the number of fields. This can involve:
  
  Normalization: Breaking the table into multiple related tables to reduce the number of fields in each table.
  Field Consolidation: Combining similar fields into a single field where applicable.
  Using Sub-tables: Creating sub-tables for certain groups of fields that can be linked back to the main table through foreign keys.
  
  
  
  Database-Specific Adjustments: If you are migrating to a specific DBMS, check its documentation for any limitations and adjust your table structure accordingly.
  
  
  Data Archiving: If certain fields are not frequently used, consider archiving that data into separate tables or databases.
  
  
  Consult SAP Documentation: Review SAP notes and documentation for any specific recommendations or best practices regarding table design and DBMS compatibility.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or solutions for this error.
  DBMS Documentation: Review the documentation for the target DBMS to understand its limitations and best practices for table design.
  Performance Considerations: Keep in mind that having a large number of fields can also impact performance, so optimizing table design can lead to better performance in addition to resolving the error.
  
  By addressing the underlying cause of the error and implementing the suggested solutions, you should be able to resolve the TG455 error and ensure smoother data conversion processes.