How To Fix Q6274 - Key length of table to be created is greater than 255 bytes

SAP Error Message - Details

• Message type: E = Error

• Message class: Q6 - Archive Information System

• Message number: 274

• Message text: Key length of table to be created is greater than 255 bytes

What causes this issue?

The key length of the character-like fields of the table, that is the
total of the field lengths of all character-like key fields is greater
than 255 bytes.
Note that some versions of SAP IQ only permit a maximum key length of
255 bytes.

System Response

If the version of SAP IQ that you use is subject to this restriction,
the structure table for infostructure &V1& is created on the standard
database during activation.

How to fix this error?

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

Procedure for System Administrators

If this is the case, check to see whether you can use a version of SAP
IQ that supports a greater key length for the character-like fields.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message Q6274 - Key length of table to be created is greater than 255 bytes ?

  The SAP error message Q6274, which states "Key length of table to be created is greater than 255 bytes," typically occurs when you are trying to create a database table in the ABAP Dictionary (SE11) and the combined length of the key fields exceeds the maximum limit of 255 bytes. This limit is imposed by the underlying database systems that SAP supports.
  Cause:
  
  Key Field Length: The total length of all key fields defined for the table exceeds 255 bytes. This can happen if you have multiple key fields, each with a significant length.
  Data Type: The data types of the key fields may have large lengths (e.g., CHAR, STRING, etc.), contributing to the overall key length.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Review Key Fields: Check the key fields defined for the table. You can do this in the ABAP Dictionary (transaction SE11) by selecting the table and reviewing the key fields.
  
  
  Reduce Key Length:
  
  Remove Unnecessary Key Fields: If there are key fields that are not essential for the uniqueness of the records, consider removing them from the key.
  Change Data Types: If possible, change the data types of the key fields to shorter types. For example, if you are using CHAR(100), consider if it can be reduced to CHAR(50) or another shorter length.
  Use a Surrogate Key: Instead of using multiple fields as keys, consider creating a surrogate key (e.g., an integer or a GUID) that can uniquely identify records.
  
  
  
  Recreate the Table: After making the necessary adjustments, try to recreate the table. Ensure that the total length of the key fields does not exceed 255 bytes.
  
  
  Related Information:
  
  Database Limitations: Different database systems may have different limitations regarding key lengths. It's essential to be aware of these when designing your database schema.
  Performance Considerations: While reducing key lengths, consider the impact on performance and data integrity. Keys should still be meaningful and efficient for lookups.
  SAP Notes: Check SAP Notes for any specific guidance or updates related to this error message, as there may be additional context or solutions provided by SAP.
  
  By following these steps, you should be able to resolve the Q6274 error and successfully create your table in SAP.