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The OE_ORDER_LINES_ALL_EXT_B table in Oracle E-Business Suite (EBS) versions 12.1.1 and 12.2.2 serves as a critical extension entity for the OE_ORDER_LINES_ALL base table, which stores order line details in the Order Management (OM) module. This table is part of Oracle's extensibility framework, allowing organizations to add custom attributes to standard order line records without modifying the core schema. The "_B" suffix denotes it as the base table for extensible flexfields (EFF), while its corresponding "_TL" (translation) table stores language-specific labels for these attributes. Key Features and Structure: 1. Primary Key Relationship: The table's primary key (LINE_ID) references OE_ORDER_LINES_ALL.LINE_ID, maintaining a strict 1:1 relationship with order line records. 2. Flexfield Integration: Supports descriptive flexfields (DFF) and extensible flexfields (EFF) through columns like ATTRIBUTE_CATEGORY (context field) and ATTRIBUTE1-15 (custom value fields). 3. Extension Columns: Contains predefined extension columns (GLOBAL_ATTRIBUTE1-20) for global attributes that apply across all contexts. 4. Multi-Org Architecture: Includes ORG_ID for multi-organization support, aligning with Oracle's security model. Technical Implementation: The table is created during the Order Management module installation with the following key DDL characteristics: 

CREATE TABLE OE_ORDER_LINES_ALL_EXT_B (
  LINE_ID NUMBER NOT NULL,
  ATTRIBUTE_CATEGORY VARCHAR2(30),
  ATTRIBUTE1 VARCHAR2(150),
  ...
  ATTRIBUTE15 VARCHAR2(150),
  GLOBAL_ATTRIBUTE1 VARCHAR2(150),
  ...
  GLOBAL_ATTRIBUTE20 VARCHAR2(150),
  ORG_ID NUMBER,
  CONSTRAINT OE_ORDER_LINES_EXT_B_PK PRIMARY KEY (LINE_ID)
);
Functional Usage: 1. Custom Data Storage: Stores industry-specific or organization-unique data elements like customer-specific part classifications, regulatory flags, or special fulfillment instructions. 2. Integration Points: Extended attributes often feed downstream systems through Order Management's integration interfaces (e.g., Order Import/Export, XML Gateway). 3. Reporting: Custom attributes become available for reporting in tools like Oracle BI Publisher or Discoverer. Implementation Considerations: 1. Performance Impact: Excessive use of extension columns can affect query performance; indexing strategies should be considered for frequently filtered attributes. 2. Upgrade Safety: Being part of the extension framework, customizations in this table are generally preserved during upgrades. 3. Validation: Any custom validation logic for extended attributes must be implemented via OM form personalization or workflow rules. Common Use Cases: - Storing customer-specific line-level requirements - Capturing regulatory compliance flags (e.g., RoHS, REACH) - Adding service contract references to product lines - Tracking special shipping or handling instructions The table participates in all standard Order Management processes including pricing, availability checking, shipping, and invoicing workflows. When implementing extensions, developers should utilize Oracle's public APIs (OE_ORDER_PUB, OE_ORDER_LINES_PUB) rather than direct DML to ensure business logic integrity. In EBS 12.2.2, this table benefits from the edition-based redefinition (EBR) feature, allowing online patching and reduced downtime for schema changes. The table's contents are automatically included in Oracle's Trading Community Architecture (TCA) data security framework when relevant.