How To Fix AD312 - &-& (foreign key definition is partial)

AD312 - Overview

• Message type: E = Error

• Message class: AD - Data Dictionary application messages

• Message number: 312

• Message text: &-& (foreign key definition is partial)

What causes this issue?

The foreign key was not fully defined in the ABAP/4 Dictionary
maintainance. Full maintenance means that exactly one field from
the table to be checked is assigned to each key field in the
check table. The fields that are assigned to one another must refer to
the same domain. The field assignment must always contain the check
field (the field with which the foreign key was defined), the position
of this field being irrelevant.

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

System Response

The ABAP/4 Dictionary table can only be activated if the foreign key has
been defined fully.

How to fix this error?

When maintaining the foreign key, all key fields from the check table
must be assigned to fields from the table to be checked (foreign key
table).

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AD312 - &-& (foreign key definition is partial) ?

  The SAP error message AD312, which states "Foreign key definition is partial," typically occurs in the context of data dictionary objects, particularly when dealing with foreign key relationships in database tables. This error indicates that the foreign key relationship defined in the database is incomplete or not properly set up.
  
  Cause:
  The error can arise due to several reasons:
  
  Incomplete Foreign Key Definition: The foreign key relationship is not fully defined. This could mean that not all fields that should be part of the foreign key are included in the definition.
  Missing Primary Key: The referenced table does not have a primary key defined, or the primary key does not match the fields defined in the foreign key.
  Field Mismatch: The data types or lengths of the fields in the foreign key do not match those in the primary key of the referenced table.
  Table Structure Changes: Changes in the structure of the tables involved (like