Search Results ahl_operation_phases_h




Overview
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Overview

The AHL_OPERATION_PHASES_H table is a history table within the Oracle E-Business Suite (EBS) module for Complex Maintenance, Repair, and Overhaul (AHL). Its primary role is to maintain a historical record of changes made to operation phase definitions stored in the base table, AHL_OPERATION_PHASES. In the context of maintenance operations, a phase represents a distinct stage or step within a larger maintenance operation. This history table is critical for audit trails, compliance reporting, and analyzing the evolution of maintenance procedures over time. It captures snapshots of operation phase data whenever the original record is created, updated, or end-dated, preserving the state of the data as it existed at specific points in time.

Key Information Stored

As a history table, AHL_OPERATION_PHASES_H typically mirrors the structure of its base table, AHL_OPERATION_PHASES, while adding columns to manage the historical tracking. The documented primary key is OPERATION_PHASES_H_ID, a unique identifier for each historical row. Two critical foreign key columns establish the core relationships: OPERATION_PHASE_ID links to the AHL_OPERATION_PHASES table to identify the specific phase being tracked, and OPERATION_ID links to AHL_OPERATIONS_B to identify the parent operation. While the full column list is not detailed in the provided metadata, standard history table conventions in Oracle EBS suggest the presence of columns such as CREATION_DATE, LAST_UPDATE_DATE, CREATED_BY, LAST_UPDATED_BY, and START_DATE/END_DATE to record the effective period of each historical version.

Common Use Cases and Queries

The primary use case is auditing and historical analysis of changes to maintenance operation phases. This supports compliance requirements and troubleshooting procedural changes. A common query pattern involves retrieving the complete change history for a specific operation phase or analyzing the state of all phases at a given historical point in time. For example, to audit changes to a phase, one might query: SELECT * FROM AHL_OPERATION_PHASES_H WHERE OPERATION_PHASE_ID = <phase_id> ORDER BY LAST_UPDATE_DATE DESC;. For reporting on the phased structure of an operation as it existed on a specific date, a query would join to AHL_OPERATIONS_B and filter based on the history table's effective date columns to reconstruct the past relationship.

Related Objects

The table has defined relationships with two key transactional tables in the AHL schema, as per the provided metadata:

  • AHL_OPERATION_PHASES: This is the primary base table. The foreign key AHL_OPERATION_PHASES_H.OPERATION_PHASE_ID references a record in this table, tying each historical row to its source operational phase.
  • AHL_OPERATIONS_B: This table defines the master operations. The foreign key AHL_OPERATION_PHASES_H.OPERATION_ID references AHL_OPERATIONS_B.OPERATION_ID, ensuring the historical phase record is linked to the correct parent operation.
These relationships are essential for joining historical data with current master definitions in any comprehensive query or report.