Search Results ak_foreign_keys




Overview
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Overview

The AK_FOREIGN_KEYS table is a core metadata repository within the Oracle E-Business Suite (EBS) Application Object Library (AOL), specifically under the AK (Common Modules-AK) product. It serves as the central registry for defining and managing foreign key relationships between application objects. Its primary role is to store the declarative definitions of foreign key constraints that govern data integrity and enforce referential rules within the EBS data model. This table is a fundamental component of the underlying application framework, enabling the system to understand and manage the relationships between different business entities, which is critical for features like dynamic region building, data validation, and dependency tracking.

Key Information Stored

The table stores the structural definition of each foreign key. While the full column list is not detailed in the provided metadata, the documented foreign key relationships reveal its critical columns. The primary key is enforced by the constraint AK_FOREIGN_KEYS_PK on the column FOREIGN_KEY_NAME. Essential columns include DATABASE_OBJECT_NAME, which links to the parent table (AK_OBJECTS), and UNIQUE_KEY_NAME, which references the specific unique or primary key constraint (AK_UNIQUE_KEYS) in the parent table that this foreign key depends upon. Other columns would typically define attributes such as the delete rule (CASCADE, SET NULL) and the enabled status of the constraint.

Common Use Cases and Queries

This table is primarily accessed by the EBS framework and tools for metadata-driven operations. Common use cases include the runtime generation of application pages where related items must be displayed or validated, and the analysis of data dependencies for impact assessment during upgrades or data migrations. A typical analytical query might involve joining this table to AK_OBJECTS to list all foreign keys for a specific table. For example:

  • Identifying foreign keys referencing a specific parent table: SELECT fk.foreign_key_name FROM ak_foreign_keys fk, ak_objects obj WHERE fk.database_object_name = obj.database_object_name AND obj.object_name = 'PO_HEADERS_ALL';
  • Analyzing the relationship network by joining with AK_FOREIGN_KEY_COLUMNS and AK_OBJECTS to map specific column-level dependencies.

Related Objects

The AK_FOREIGN_KEYS table is a central node in the AK metadata schema. As per the documentation, it has direct relationships with several key tables:

  • AK_OBJECTS: The parent table for the DATABASE_OBJECT_NAME foreign key, defining the object that owns the referenced unique key.
  • AK_UNIQUE_KEYS: The parent table for the UNIQUE_KEY_NAME foreign key, defining the specific constraint being referenced.
  • AK_FOREIGN_KEY_COLUMNS: A child table that stores the specific column mappings between the foreign key and the referenced unique key.
  • AK_FOREIGN_KEYS_TL: A child table providing translated descriptions for the foreign key names.
  • AK_FLOW_REGION_RELATIONS: A child table that utilizes foreign key definitions to establish relationships between regions in the application's UI flow.