Search Results ahl_rt_oper_materials_h




Overview
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Overview

The AHL_RT_OPER_MATERIALS_H table is a critical data object within the Oracle E-Business Suite (EBS) module for Complex Maintenance, Repair, and Overhaul (CMRO). It functions as a history table, archiving all changes made to the operational material requirements defined for routes and operations. In the context of EBS 12.1.1 and 12.2.2, this table ensures a complete audit trail for modifications to material specifications, which is essential for compliance, troubleshooting, and analyzing the evolution of maintenance procedures over time. It directly supports the AHL product's core functionality of managing detailed maintenance and service processes.

Key Information Stored

The table's primary purpose is to capture historical versions of records from its parent table, AHL_RT_OPER_MATERIALS. Its structure is designed to mirror the operational data while adding context for the change. The primary key, RT_OPER_MATERIALS_H_ID, uniquely identifies each historical entry. Key foreign key columns establish the table's relationships: RT_OPER_MATERIAL_ID links to the specific material requirement in the base table, while INVENTORY_ITEM_ID and INVENTORY_ORG_ID together reference the inventory item and organization in MTL_SYSTEM_ITEMS_B. The OBJECT_ID column is a polymorphic foreign key that can reference either a parent route (AHL_ROUTES_B) or a specific operation (AHL_OPERATIONS_B), defining the context of the material requirement. The table inherently tracks the standard who-columns (CREATION_DATE, CREATED_BY, LAST_UPDATE_DATE, LAST_UPDATED_BY) to record who made the change and when.

Common Use Cases and Queries

This table is primarily accessed for audit reports and historical analysis. A common use case involves generating a report to show all modifications made to the material components of a specific maintenance route over a given period. Another scenario is tracing why a particular part number was added or removed from an operation's bill of materials. A typical query pattern would join this history table with the item master and route/operation tables to present a readable audit trail.

  • Sample Query Pattern: SELECT armh.object_id, armh.inventory_item_id, msib.segment1 item_code, armh.creation_date, armh.created_by FROM ahl_rt_oper_materials_h armh, mtl_system_items_b msib WHERE armh.inventory_item_id = msib.inventory_item_id AND armh.inventory_org_id = msib.organization_id AND armh.object_id = :route_id ORDER BY armh.creation_date DESC;
  • Reporting Use Case: Compliance audits requiring a complete history of changes to maintenance work instructions and their required materials.

Related Objects

The AHL_RT_OPER_MATERIALS_H table is centrally connected to several core CMRO entities. Its most direct relationship is with the AHL_RT_OPER_MATERIALS table, from which it receives its historical snapshots. It depends on the inventory master via MTL_SYSTEM_ITEMS_B to resolve item details. Furthermore, it references the higher-level maintenance structures through foreign keys to AHL_ROUTES_B (for route-level materials) and AHL_OPERATIONS_B (for operation-specific materials). This network of relationships positions the history table as an integral component for preserving the integrity and traceability of the maintenance material definition lifecycle.