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The PA_SYSTEM_NUMBERS table in Oracle E-Business Suite (EBS) 12.1.1 or 12.2.2 is a critical repository for managing system-generated numbers within the Project Accounting (PA) module. This table serves as a centralized control mechanism for maintaining unique identifiers across various project-related transactions, ensuring data integrity and consistency in financial and operational reporting. Below is a detailed analysis of its structure, purpose, and functional significance.

Purpose and Context

The PA_SYSTEM_NUMBERS table is designed to store sequential numbering information for key entities in Oracle Project Accounting, such as expenditure items, events, and other transactional records. It acts as a numbering engine, preventing duplicate entries and enforcing uniqueness in identifiers. This is particularly vital in multi-organization environments where concurrent transactions require robust synchronization.

Key Columns and Structure

The table comprises columns that define the numbering logic:

SYSTEM_NUMBER_TYPE: Specifies the category of the number (e.g., 'EXPENDITURE_ITEM_ID', 'EVENT_ID').
LAST_SYSTEM_NUMBER: Stores the last used value in the sequence, ensuring the next number is incremented correctly.
ORG_ID: Associates numbers with specific operating units (multi-org support).
START_DATE and END_DATE: Define the validity period for numbering ranges.

Additional columns like CREATION_DATE, CREATED_BY, and LAST_UPDATE_DATE track audit trails.

Functional Workflow

When a new transaction (e.g., an expenditure item) is created, the PA module queries PA_SYSTEM_NUMBERS to reserve the next available number. The process involves:

Locking the relevant row to prevent concurrent access.
Incrementing LAST_SYSTEM_NUMBER.
Committing the update to release the lock.

This ensures thread-safe operations in high-volume environments.

Integration with Other Modules

The table interacts with:

PA_EXPENDITURES_ALL: Expenditure items reference numbers generated here.
PA_EVENTS: Event IDs are sourced from this table.
GL_INTERFACE: Financial integrations rely on unique project identifiers.

Customizations or direct DML operations on this table are discouraged due to risks of sequence corruption.

Performance and Maintenance

Oracle optimizes access to PA_SYSTEM_NUMBERS through indexed queries on SYSTEM_NUMBER_TYPE and ORG_ID. Administrators should monitor contention during peak periods. Periodic reconciliation with dependent tables (via PA_SEQUENCE_CONTROL reports) is recommended to detect anomalies.

Conclusion

The PA_SYSTEM_NUMBERS table is a foundational component of Oracle EBS Project Accounting, ensuring deterministic numbering for critical transactions. Its design supports scalability, auditability, and multi-org compliance, making it indispensable for accurate project financial management. Understanding its mechanics is essential for troubleshooting data issues or extending PA functionality.

Lookup Type: EXPENDITURE ITEM AMOUNTS 12.2.2
product: PA - Projects , meaning: Expenditure Item Amounts , description: Expenditure Item Amounts ,
Lookup Type: EXPENDITURE ITEM AMOUNTS 12.1.1
product: PA - Projects , meaning: Expenditure Item Amounts , description: Expenditure Item Amounts ,
Lookup Type: EXPENDITURE ITEM DETAILS 12.2.2
product: PA - Projects , meaning: Expenditure Item Details , description: Expenditure Item Details ,
Lookup Type: EXPENDITURE ITEM DETAILS 12.1.1
product: PA - Projects , meaning: Expenditure Item Details , description: Expenditure Item Details ,
Lookup Type: VIEW EXP ITEM OPTION 12.2.2
product: PA - Projects , meaning: View Exp Item Option , description: View Exp Item Option ,
Lookup Type: ADJUST EXP ITEM ACTION 12.2.2
product: PA - Projects , meaning: Adjust Exp Item Action , description: Adjust Exp Item Action ,
Lookup Type: ADJUST INVOICE ITEM ACTION 12.2.2
product: PA - Projects , meaning: Adjust Invoice Item Action , description: Adjust Invoice Item Action ,
Lookup Type: REVIEW EXP ITEM OPTION 12.2.2
product: PA - Projects , meaning: Review Exp Item Option , description: Review Exp Item Option ,
Lookup Type: ADJUST EXP ITEM ACTION 12.1.1
product: PA - Projects , meaning: Adjust Exp Item Action , description: Adjust Exp Item Action ,
Lookup Type: REVIEW EXP ITEM OPTION 12.1.1
product: PA - Projects , meaning: Review Exp Item Option , description: Review Exp Item Option ,
Lookup Type: VIEW EXP ITEM OPTION 12.1.1
product: PA - Projects , meaning: View Exp Item Option , description: View Exp Item Option ,
Lookup Type: ADJUST INVOICE ITEM ACTION 12.1.1
product: PA - Projects , meaning: Adjust Invoice Item Action , description: Adjust Invoice Item Action ,
Lookup Type: EXCEPTION ACTIVITY 12.2.2
product: PA - Projects , meaning: Exception Activity , description: Exception Activity ,
Lookup Type: EXCEPTION ACTIVITY 12.1.1
product: PA - Projects , meaning: Exception Activity , description: Exception Activity ,
Lookup Type: PA_SST_AUDIT_TYPE 12.2.2
product: PA - Projects , meaning: The type of audit record. , description: The type of audit record. ,
Lookup Type: PA_SST_AUDIT_TYPE 12.1.1
product: PA - Projects , meaning: The type of audit record. , description: The type of audit record. ,
Lookup Type: REVENUE SOURCE 12.2.2
product: PA - Projects , meaning: Revenue Source , description: Revenue Source ,
Lookup Type: CONTROL_ITEM_STATUS_ACTIONS 12.2.2
product: PA - Projects , meaning: Control Item Status Controls ,
Lookup Type: CONTROL_ITEM_STATUS_ACTIONS 12.1.1
product: PA - Projects , meaning: Control Item Status Controls ,
Lookup Type: REVENUE SOURCE 12.1.1
product: PA - Projects , meaning: Revenue Source , description: Revenue Source ,
Lookup Type: PA_ADJUSTMENT_STATUS 12.2.2
product: PA - Projects , meaning: Adjustment status of the item in Projects. , description: Adjustment status of the item in Projects. ,
Lookup Type: PA_ADJUSTMENT_STATUS 12.1.1
product: PA - Projects , meaning: Adjustment status of the item in Projects. , description: Adjustment status of the item in Projects. ,
Lookup Type: STATUS_TYPE 12.2.2
product: PA - Projects , meaning: Status Type , description: Status type of the status-owning entity ,
Lookup Type: STATUS_TYPE 12.1.1
product: PA - Projects , meaning: Status Type , description: Status type of the status-owning entity ,
Lookup Type: PA_AP_EI_DATE_DEFAULT 12.1.1
product: PA - Projects , meaning: Default Expenditure Item Date for supplier Invoice , description: The default expenditure item date for supplier cost ,
Lookup Type: PA_AP_EI_DATE_DEFAULT 12.2.2
product: PA - Projects , meaning: Default Expenditure Item Date for supplier Invoice , description: The default expenditure item date for supplier cost ,
Lookup Type: PA_DLVR_TYPE 12.1.1
product: PA - Projects , meaning: Deliverable Type Class , description: Deliverable Type Class ,
Lookup Type: PA_DLVR_TYPE 12.2.2
product: PA - Projects , meaning: Deliverable Type Class , description: Deliverable Type Class ,
Lookup Type: REVIEW TRANSFER LEVEL 12.2.2
product: PA - Projects , meaning: Review Transfer Level , description: Review Transfer Level ,
Lookup Type: REVIEW TRANSFER LEVEL 12.1.1
product: PA - Projects , meaning: Review Transfer Level , description: Review Transfer Level ,
Lookup Type: FORECAST_OTHERS_REJECTION_CODE 12.1.1
product: PA - Projects , meaning: Forecast Others Rejection Code , description: Forecast Others Rejection Code ,
Lookup Type: FORECAST_OTHERS_REJECTION_CODE 12.2.2
product: PA - Projects , meaning: Forecast Others Rejection Code , description: Forecast Others Rejection Code ,
Lookup Type: PA_ACCT_SOURCE_CODE 12.1.1
product: PA - Projects , meaning: Projects Default Accounting Sources , description: Projects Default Accounting Sources ,
Lookup Type: PA_ACCT_SOURCE_CODE 12.2.2
product: PA - Projects , meaning: Projects Default Accounting Sources , description: Projects Default Accounting Sources ,
Lookup Type: TRANSACTION REJECTION REASON 12.2.2
product: PA - Projects , meaning: Transaction Rejection Reason , description: The reason why a transaction was rejected during import into PA from an external system via Transaction Import ,
Lookup Type: PA_CAPITAL_CLIENT_EXTN 12.1.1
product: PA - Projects , meaning: Pa Capital Client Extn , description: Capital Client Extension Asset Assignment ,
Lookup Type: PA_CAPITAL_CLIENT_EXTN 12.2.2
product: PA - Projects , meaning: Pa Capital Client Extn , description: Capital Client Extension Asset Assignment ,
Lookup Type: COST DIST REJECTION CODE 12.1.1
product: PA - Projects , meaning: Reason why an expenditure item cannot be cost distributed , description: Reason why an expenditure item cannot be cost distributed ,
Lookup Type: TRANSACTION REJECTION REASON 12.1.1
product: PA - Projects , meaning: Transaction Rejection Reason , description: The reason why a transaction was rejected during import into PA from an external system via Transaction Import ,
Lookup Type: TRANSFER REJECTION CODE 12.2.2
product: PA - Projects , meaning: Transfer Rejection Code , description: Reason why a cost or revenue item was rejected during transfer to another application or tieback from another application ,
Lookup Type: COST DIST REJECTION CODE 12.2.2
product: PA - Projects , meaning: Reason why an expenditure item cannot be cost distributed , description: Reason why an expenditure item cannot be cost distributed ,
Lookup Type: TRANSFER REJECTION CODE 12.1.1
product: PA - Projects , meaning: Transfer Rejection Code , description: Reason why a cost or revenue item was rejected during transfer to another application or tieback from another application ,
Lookup Type: PA_CI_CHANGE_REASONS 12.2.2
product: PA - Projects , meaning: Control Item Change Reasons , description: Control Item Change Reasons ,
Lookup Type: PA_CI_TYPE_NUMBERING_MODE 12.1.1
product: PA - Projects , meaning: Control Item Type Numbering Modes , description: Control Item Type Numbering Modes ,
Lookup Type: PA_CI_EFFORT_LEVELS 12.1.1
product: PA - Projects , meaning: Control Item Effort Levels , description: Control Item Effort Levels ,
Table: PA_SYSTEM_NUMBERS 12.1.1
owner:PA, object_type:TABLE, fnd_design_data:PA.PA_SYSTEM_NUMBERS, object_name:PA_SYSTEM_NUMBERS, status:VALID, product: PA - Projects , description: PA_SYSTEM_NUMBERS stores the next available control item type number for the project item type intersection. , implementation_dba_data: PA.PA_SYSTEM_NUMBERS ,
Table: PA_SYSTEM_NUMBERS 12.2.2
owner:PA, object_type:TABLE, fnd_design_data:PA.PA_SYSTEM_NUMBERS, object_name:PA_SYSTEM_NUMBERS, status:VALID, product: PA - Projects , description: PA_SYSTEM_NUMBERS stores the next available control item type number for the project item type intersection. , implementation_dba_data: PA.PA_SYSTEM_NUMBERS ,
Lookup Type: PA_CI_LOCKED_STATUSES 12.2.2
product: PA - Projects , meaning: Control Item Locked Statuses , description: Control Item Locked Statuses ,
Lookup Type: RATE_DATE_CODE 12.2.2
product: PA - Projects , meaning: Default rate date code , description: Default rate date code ,
Lookup Type: PA_CI_TYPE_NUMBERING_MODE 12.2.2
product: PA - Projects , meaning: Control Item Type Numbering Modes , description: Control Item Type Numbering Modes ,