How To Fix SDDL_PARSER_MSG407 - Column "&1" cannot be defined as a key field

SDDL_PARSER_MSG407 - Overview

• Message type: E = Error

• Message class: SDDL_PARSER_MSG - Message Class for DDL Parser

• Message number: 407

• Message text: Column "&1" cannot be defined as a key field

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 SDDL_PARSER_MSG407 - Column "&1" cannot be defined as a key field ?

  The SAP error message SDDL_PARSER_MSG407 indicates that there is an issue with defining a column as a key field in a data model or database table. The specific message states that the column "&1" cannot be defined as a key field. This typically occurs in the context of SAP Data Dictionary or when working with database tables in ABAP.
  Cause
  The error can arise due to several reasons:
  
  
  Data Type Restrictions: The column you are trying to define as a key field may have a data type that is not suitable for key fields. For example, certain data types like TEXT or BLOB cannot be used as key fields.
  
  
  Nullability: Key fields must be defined as NOT NULL. If the column allows NULL values, it cannot be a key field.
  
  
  Duplicate Values: If the column is expected to have duplicate values, it cannot be defined as a key field since key fields must be unique.
  
  
  Technical