Search Results po_history_pos_all




The PO_HISTORY_POS_ALL table in Oracle E-Business Suite (EBS) versions 12.1.1 and 12.2.2 is a critical repository for tracking historical changes to purchase order (PO) line-level data. As part of the Purchasing module, this table captures snapshots of PO line details whenever modifications occur, enabling auditability, compliance reporting, and historical trend analysis. Below is a detailed breakdown of its structure, functionality, and integration within Oracle EBS.

Purpose and Functional Role

PO_HISTORY_POS_ALL serves as an audit trail for changes to purchase order lines (stored in PO_LINES_ALL). It logs modifications to critical attributes such as quantity, unit price, delivery dates, and item descriptions. This supports:
  • Compliance: Meets regulatory requirements (e.g., SOX) by preserving historical PO data.
  • Dispute Resolution: Provides evidence of contractual terms at specific points in time.
  • Analytics: Enables comparison of PO revisions for spend analysis or supplier performance.

Key Columns and Relationships

The table’s structure includes columns that link to transactional data and capture change metadata:
  • PO_LINE_ID: Foreign key to PO_LINES_ALL, identifying the modified line.
  • LAST_UPDATE_DATE, LAST_UPDATED_BY: Timestamp and user who made the change.
  • HISTORY_ID: Primary key, often a sequence-generated value.
  • CHANGE_TYPE: Indicates the nature of the modification (e.g., "UPDATE," "CANCEL").
  • Attribute-specific columns (e.g., QUANTITY, UNIT_PRICE) storing pre- or post-change values.
It joins with PO_HEADERS_ALL (via PO_HEADER_ID) and integrates with approval workflows in WF_NOTIFICATIONS.

Technical Implementation

Data is populated via:
  • Database Triggers: Automatically fire on DML operations against PO_LINES_ALL.
  • API Calls: Purchasing APIs (e.g., PO_PDOI) may insert records during bulk imports.
Oracle’s versioning mechanism ensures minimal performance overhead by capturing only changed fields. In EBS 12.2.2, partitioning may be employed for large datasets.

Integration with EBS Modules

The table interacts with:
  • Inventory: Historical line quantities aid in reconciling receipts.
  • Payables: Links to AP_INVOICES_ALL for matched invoice validation.
  • Order Management: Cross-references drop-ship POs via OE_ORDER_LINES_ALL.

Customization Considerations

Extensions to PO_HISTORY_POS_ALL require caution:
  • Indexing: Custom indexes on frequently queried columns (e.g., PO_LINE_ID + LAST_UPDATE_DATE) may improve performance.
  • Purge Policies: Archiving strategies should align with Oracle’s Purge APIs to avoid referential integrity issues.
  • Audit Enhancements: Additional columns (e.g., REASON_CODE) can be added but may require trigger modifications.

Reporting and Diagnostics

Standard reports leverage this table via:
  • Oracle Purchasing Reports: "PO Change History Report" (POXHCHIS).
  • BI Publisher: Custom templates for audit trails.
  • SQL Queries: Direct access for ad-hoc analysis (ensure proper Org_ID filtering in multi-org environments).
In summary, PO_HISTORY_POS_ALL is a foundational component of Oracle EBS Purchasing’s audit framework, designed to balance transactional performance with comprehensive historical tracking. Its structure and integration points reflect Oracle’s best practices for change management in procurement processes.