How To Fix DDLS493 - Only one long field allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: DDLS - For DDL source handling

• Message number: 493

• Message text: Only one long field allowed

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message DDLS493 - Only one long field allowed ?

  The SAP error message DDLS493: Only one long field allowed typically occurs when you are trying to create or modify a database table in the Data Dictionary (SE11) or during a transport of a table definition that includes more than one long field (i.e., a field of type STRING or LONGCHAR). In SAP, a database table can only have one long field due to database constraints and performance considerations.
  Cause:
  
  Multiple Long Fields: The primary cause of this error is the attempt to define more than one field of type STRING or LONGCHAR in a single database table.
  Table Definition: When defining a table, if you inadvertently add more than one long field, the system will raise this error.
  
  Solution:
  To resolve the error, you need to ensure that your table definition adheres to the restriction of having only one long field. Here are the steps you can take:
  
  Review Table Structure: Go to the Data Dictionary (transaction SE11) and review the structure of the table you are trying to create or modify.
  Remove Extra Long Fields: If you find that there are multiple long fields, decide which one is necessary and remove the others. You can change the data type of the other fields to a standard type (like CHAR, VARCHAR, etc.) that does not have the same restriction.
  Adjust Data Types: If you need to store large amounts of text in multiple fields, consider using a combination of CHAR or VARCHAR fields with appropriate lengths instead of multiple long fields.
  Re-activate the Table: After making the necessary changes, activate the table definition again.
  
  Related Information:
  
  Data Types: In SAP, the STRING type is used for variable-length strings, while LONGCHAR is used for long character strings. Both types are considered "long fields."
  Database Limitations: The limitation of having only one long field is often due to the underlying database's capabilities and performance optimizations.
  Documentation: For more detailed information, you can refer to the SAP Help Portal or the specific documentation related to the Data Dictionary and table definitions.
  
  By following these steps, you should be able to resolve the DDLS493 error and successfully create or modify your database table.