How To Fix AD646 - Table & (primary key is not compact)

AD646 - Overview

• Message type: E = Error

• Message class: AD - Data Dictionary application messages

• Message number: 646

• Message text: Table & (primary key is not compact)

What causes this issue?

The primary key fields in a table must be located together at the
beginning of the table. This condition has not been met in this case,
i.e. there is at least one non-key field between two key fields.

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?

Change the primary key so that all key fields of the table are located
together at the beginning of the table.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AD646 - Table & (primary key is not compact) ?

  The SAP error message AD646 indicates that a specific database table (denoted by &) has a primary key that is not compact. This typically occurs in the context of database performance and optimization, particularly in SAP systems that use the ABAP Dictionary.
  
  Cause:
  The primary key of a database table is considered "not compact" when it contains multiple fields that are not optimally structured for storage and retrieval. This can lead to inefficient use of space and slower performance when accessing the table. The compactness of a primary key is important for database indexing and can affect the overall performance of database operations.
  
  Solution:
  To resolve the AD646 error, you can take the following steps:
  
  
  Analyze the Table Structure:
  
  Review the structure of the table in the ABAP Dictionary (transaction SE11).
  Identify the fields that make up the primary key and assess whether they can be optimized.
  
  
  
  Modify the Primary Key:
  
  If possible, consider reducing the number of fields