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/*
OTBI analyses are built visually, not with SQL. This conceptual query illustrates the logic required to extract the data for all specified activities. The user would build an analysis containing these fields and then transform the output into an event log.
*/

-- 1. Requisition Created
SELECT 
  "Requisition Header"."Requisition Number" AS PurchaseRequisitionId,
  'Requisition Created' AS ActivityName,
  "Requisition Header"."Requisition Creation Date" AS EventTime,
  'Oracle Fusion Financials OTBI' AS SourceSystem,
  CURRENT_TIMESTAMP AS LastDataUpdate,
  "Requisition Distribution"."Requester Name" AS RequesterName,
  "Requisition Distribution"."Requester Department" AS DepartmentName,
  "Requisition Header"."Total" AS RequisitionTotalAmount,
  "Requisition Header"."Requisition Status" AS RequisitionStatus,
  "Requisition Line"."Need By Date" AS RequiredByDate,
  NULL AS RejectionReason,
  "Requisition Header"."Business Unit" AS BusinessUnit
FROM "Procurement - Requisitions Real Time"
WHERE "Requisition Header"."Requisition Creation Date" IS NOT NULL

UNION ALL

-- 2. Requisition Submitted
SELECT 
  "Requisition Header"."Requisition Number" AS PurchaseRequisitionId,
  'Requisition Submitted' AS ActivityName,
  "Requisition Header"."Submitted Date" AS EventTime,
  'Oracle Fusion Financials OTBI' AS SourceSystem,
  CURRENT_TIMESTAMP AS LastDataUpdate,
  "Requisition Distribution"."Requester Name" AS RequesterName,
  "Requisition Distribution"."Requester Department" AS DepartmentName,
  "Requisition Header"."Total" AS RequisitionTotalAmount,
  "Requisition Header"."Requisition Status" AS RequisitionStatus,
  "Requisition Line"."Need By Date" AS RequiredByDate,
  NULL AS RejectionReason,
  "Requisition Header"."Business Unit" AS BusinessUnit
FROM "Procurement - Requisitions Real Time"
WHERE "Requisition Header"."Submitted Date" IS NOT NULL

UNION ALL

-- 3, 5, 6, 7, 8. Approval History Events (Withdrawn, Started, Approved, Rejected, Returned)
SELECT 
  "Requisition Header"."Requisition Number" AS PurchaseRequisitionId,
  CASE "Requisition Action History"."Action"
    WHEN 'WITHDRAW' THEN 'Requisition Withdrawn'
    WHEN 'SUBMIT' THEN 'Approval Step Started' -- Assumes submit action assigns to first approver
    WHEN 'APPROVE' THEN 'Approval Step Approved'
    WHEN 'REJECT' THEN 'Approval Step Rejected'
    WHEN 'RETURN' THEN 'Approval Step Returned'
  END AS ActivityName,
  "Requisition Action History"."Action Date" AS EventTime,
  'Oracle Fusion Financials OTBI' AS SourceSystem,
  CURRENT_TIMESTAMP AS LastDataUpdate,
  "Requisition Distribution"."Requester Name" AS RequesterName,
  "Requisition Distribution"."Requester Department" AS DepartmentName,
  "Requisition Header"."Total" AS RequisitionTotalAmount,
  "Requisition Header"."Requisition Status" AS RequisitionStatus,
  "Requisition Line"."Need By Date" AS RequiredByDate,
  CASE WHEN "Requisition Action History"."Action" = 'REJECT' THEN "Requisition Action History"."Action Note" ELSE NULL END AS RejectionReason,
  "Requisition Header"."Business Unit" AS BusinessUnit
FROM "Procurement - Requisitions Real Time"
WHERE "Requisition Action History"."Action" IN ('WITHDRAW', 'SUBMIT', 'APPROVE', 'REJECT', 'RETURN')

UNION ALL

-- 4. Requisition Amended
SELECT 
  "Requisition Header"."Requisition Number" AS PurchaseRequisitionId,
  'Requisition Amended' AS ActivityName,
  "Requisition Header"."Last Update Date" AS EventTime,
  'Oracle Fusion Financials OTBI' AS SourceSystem,
  CURRENT_TIMESTAMP AS LastDataUpdate,
  "Requisition Distribution"."Requester Name" AS RequesterName,
  "Requisition Distribution"."Requester Department" AS DepartmentName,
  "Requisition Header"."Total" AS RequisitionTotalAmount,
  "Requisition Header"."Requisition Status" AS RequisitionStatus,
  "Requisition Line"."Need By Date" AS RequiredByDate,
  NULL AS RejectionReason,
  "Requisition Header"."Business Unit" AS BusinessUnit
FROM "Procurement - Requisitions Real Time"
WHERE "Requisition Header"."Requisition Version" > 1 AND "Requisition Header"."Last Update Date" > "Requisition Header"."Submitted Date"

UNION ALL

-- 9. Requisition Approved (Final)
SELECT 
  "Requisition Header"."Requisition Number" AS PurchaseRequisitionId,
  'Requisition Approved' AS ActivityName,
  "Requisition Header"."Approved Date" AS EventTime,
  'Oracle Fusion Financials OTBI' AS SourceSystem,
  CURRENT_TIMESTAMP AS LastDataUpdate,
  "Requisition Distribution"."Requester Name" AS RequesterName,
  "Requisition Distribution"."Requester Department" AS DepartmentName,
  "Requisition Header"."Total" AS RequisitionTotalAmount,
  "Requisition Header"."Requisition Status" AS RequisitionStatus,
  "Requisition Line"."Need By Date" AS RequiredByDate,
  NULL AS RejectionReason,
  "Requisition Header"."Business Unit" AS BusinessUnit
FROM "Procurement - Requisitions Real Time"
WHERE "Requisition Header"."Requisition Status" = 'APPROVED'
AND "Requisition Header"."Approved Date" IS NOT NULL

UNION ALL

-- 10. Requisition Rejected (Final)
SELECT 
  "Requisition Header"."Requisition Number" AS PurchaseRequisitionId,
  'Requisition Rejected' AS ActivityName,
  "Requisition Action History"."Action Date" AS EventTime,
  'Oracle Fusion Financials OTBI' AS SourceSystem,
  CURRENT_TIMESTAMP AS LastDataUpdate,
  "Requisition Distribution"."Requester Name" AS RequesterName,
  "Requisition Distribution"."Requester Department" AS DepartmentName,
  "Requisition Header"."Total" AS RequisitionTotalAmount,
  "Requisition Header"."Requisition Status" AS RequisitionStatus,
  "Requisition Line"."Need By Date" AS RequiredByDate,
  "Requisition Action History"."Action Note" AS RejectionReason,
  "Requisition Header"."Business Unit" AS BusinessUnit
FROM "Procurement - Requisitions Real Time"
WHERE "Requisition Header"."Requisition Status" = 'REJECTED'
AND "Requisition Action History"."Action" = 'REJECT'
AND "Requisition Action History"."Sequence Number" = (SELECT MAX(T2."Sequence Number") FROM "Procurement - Requisitions Real Time" T2 WHERE T2."Requisition Header"."Requisition Number" = "Requisition Header"."Requisition Number")

UNION ALL

-- 11. Purchase Order Created
SELECT 
  "Requisition Header"."Requisition Number" AS PurchaseRequisitionId,
  'Purchase Order Created' AS ActivityName,
  "Purchase Order Schedule"."PO Creation Date" AS EventTime,
  'Oracle Fusion Financials OTBI' AS SourceSystem,
  CURRENT_TIMESTAMP AS LastDataUpdate,
  "Requisition Distribution"."Requester Name" AS RequesterName,
  "Requisition Distribution"."Requester Department" AS DepartmentName,
  "Requisition Header"."Total" AS RequisitionTotalAmount,
  "Requisition Header"."Requisition Status" AS RequisitionStatus,
  "Requisition Line"."Need By Date" AS RequiredByDate,
  NULL AS RejectionReason,
  "Requisition Header"."Business Unit" AS BusinessUnit
FROM "Procurement - Requisitions Real Time"
WHERE "Purchase Order Schedule"."PO Creation Date" IS NOT NULL

UNION ALL

-- 12. Requisition Closed
SELECT 
  "Requisition Header"."Requisition Number" AS PurchaseRequisitionId,
  'Requisition Closed' AS ActivityName,
  "Requisition Line"."Line Close Date" AS EventTime,
  'Oracle Fusion Financials OTBI' AS SourceSystem,
  CURRENT_TIMESTAMP AS LastDataUpdate,
  "Requisition Distribution"."Requester Name" AS RequesterName,
  "Requisition Distribution"."Requester Department" AS DepartmentName,
  "Requisition Header"."Total" AS RequisitionTotalAmount,
  "Requisition Header"."Requisition Status" AS RequisitionStatus,
  "Requisition Line"."Need By Date" AS RequiredByDate,
  NULL AS RejectionReason,
  "Requisition Header"."Business Unit" AS BusinessUnit
FROM "Procurement - Requisitions Real Time"
WHERE "Requisition Line"."Line Close Date" IS NOT NULL AND "Requisition Line"."Line Status" = 'CLOSED'

WITH BaseRequisitions AS (
    SELECT
        PRH.REQUISITION_HEADER_ID,
        PRH.REQUISITION_NUMBER,
        PRH.CREATION_DATE,
        PRH.LAST_UPDATE_DATE AS HEADER_LAST_UPDATE_DATE,
        PRH.DOCUMENT_STATUS,
        PRH.PREPARER_ID,
        PPNF_REQ.DISPLAY_NAME AS RequesterName,
        HOU.NAME AS DepartmentName,
        BU.BU_NAME AS BusinessUnit,
        SUM(PRL.AMOUNT) OVER (PARTITION BY PRH.REQUISITION_HEADER_ID) AS RequisitionTotalAmount,
        MIN(PRL.NEED_BY_DATE) OVER (PARTITION BY PRH.REQUISITION_HEADER_ID) AS RequiredByDate
    FROM
        POR_REQUISITION_HEADERS_ALL PRH
    JOIN
        POR_REQUISITION_LINES_ALL PRL ON PRH.REQUISITION_HEADER_ID = PRL.REQUISITION_HEADER_ID
    JOIN
        PER_USERS PU_REQ ON PRH.PREPARER_ID = PU_REQ.USER_ID
    LEFT JOIN
        PER_PERSON_NAMES_F PPNF_REQ ON PU_REQ.PERSON_ID = PPNF_REQ.PERSON_ID AND PPNF_REQ.NAME_TYPE = 'GLOBAL' AND SYSDATE BETWEEN PPNF_REQ.EFFECTIVE_START_DATE AND PPNF_REQ.EFFECTIVE_END_DATE
    LEFT JOIN
        PER_ALL_ASSIGNMENTS_F PAAF ON PU_REQ.PERSON_ID = PAAF.PERSON_ID AND PAAF.ASSIGNMENT_TYPE = 'E' AND PAAF.PRIMARY_FLAG = 'Y' AND SYSDATE BETWEEN PAAF.EFFECTIVE_START_DATE AND PAAF.EFFECTIVE_END_DATE
    LEFT JOIN
        HR_ORGANIZATION_UNITS_F_VL HOU ON PAAF.ORGANIZATION_ID = HOU.ORGANIZATION_ID AND SYSDATE BETWEEN HOU.EFFECTIVE_START_DATE AND HOU.EFFECTIVE_END_DATE
    JOIN
        FUN_ALL_BUSINESS_UNITS_V BU ON PRH.REQ_BU_ID = BU.BU_ID
    WHERE PRH.CREATION_DATE BETWEEN TO_DATE(:p_start_date, 'YYYY-MM-DD') AND TO_DATE(:p_end_date, 'YYYY-MM-DD')
    -- AND BU.BU_NAME IN ('[Your Business Unit Name]') -- Recommended: Uncomment and specify your Business Unit(s)
)
-- 1. Requisition Created
SELECT DISTINCT
    BR.REQUISITION_HEADER_ID AS "PurchaseRequisitionId",
    'Requisition Created' AS "ActivityName",
    BR.CREATION_DATE AS "EventTime",
    'Oracle Fusion Financials' AS "SourceSystem",
    SYSTIMESTAMP AS "LastDataUpdate",
    BR.RequesterName,
    BR.DepartmentName,
    BR.RequisitionTotalAmount,
    BR.DOCUMENT_STATUS AS "RequisitionStatus",
    BR.RequiredByDate,
    NULL AS "RejectionReason",
    BR.BusinessUnit
FROM BaseRequisitions BR

UNION ALL

-- 2. Requisition Submitted, 4. Requisition Amended
SELECT DISTINCT
    BR.REQUISITION_HEADER_ID AS "PurchaseRequisitionId",
    CASE 
        WHEN PAH.OBJECT_REVISION_NUM > 1 THEN 'Requisition Amended'
        ELSE 'Requisition Submitted'
    END AS "ActivityName",
    PAH.ACTION_DATE AS "EventTime",
    'Oracle Fusion Financials' AS "SourceSystem",
    SYSTIMESTAMP AS "LastDataUpdate",
    BR.RequesterName,
    BR.DepartmentName,
    BR.RequisitionTotalAmount,
    BR.DOCUMENT_STATUS AS "RequisitionStatus",
    BR.RequiredByDate,
    NULL AS "RejectionReason",
    BR.BusinessUnit
FROM BaseRequisitions BR
JOIN PO_ACTION_HISTORY PAH ON BR.REQUISITION_HEADER_ID = PAH.OBJECT_ID
WHERE PAH.OBJECT_TYPE_CODE = 'REQUISITION' AND PAH.ACTION_CODE = 'SUBMIT'

UNION ALL

-- 3. Requisition Withdrawn
SELECT DISTINCT
    BR.REQUISITION_HEADER_ID AS "PurchaseRequisitionId",
    'Requisition Withdrawn' AS "ActivityName",
    PAH.ACTION_DATE AS "EventTime",
    'Oracle Fusion Financials' AS "SourceSystem",
    SYSTIMESTAMP AS "LastDataUpdate",
    BR.RequesterName,
    BR.DepartmentName,
    BR.RequisitionTotalAmount,
    BR.DOCUMENT_STATUS AS "RequisitionStatus",
    BR.RequiredByDate,
    NULL AS "RejectionReason",
    BR.BusinessUnit
FROM BaseRequisitions BR
JOIN PO_ACTION_HISTORY PAH ON BR.REQUISITION_HEADER_ID = PAH.OBJECT_ID
WHERE PAH.OBJECT_TYPE_CODE = 'REQUISITION' AND PAH.ACTION_CODE = 'WITHDRAW'

UNION ALL

-- 5. Approval Step Started
SELECT DISTINCT
    BR.REQUISITION_HEADER_ID AS "PurchaseRequisitionId",
    'Approval Step Started' AS "ActivityName",
    PAH.CREATION_DATE AS "EventTime",
    'Oracle Fusion Financials' AS "SourceSystem",
    SYSTIMESTAMP AS "LastDataUpdate",
    BR.RequesterName,
    BR.DepartmentName,
    BR.RequisitionTotalAmount,
    BR.DOCUMENT_STATUS AS "RequisitionStatus",
    BR.RequiredByDate,
    NULL AS "RejectionReason",
    BR.BusinessUnit
FROM BaseRequisitions BR
JOIN PO_ACTION_HISTORY PAH ON BR.REQUISITION_HEADER_ID = PAH.OBJECT_ID
WHERE PAH.OBJECT_TYPE_CODE = 'REQUISITION' AND PAH.ACTION_CODE IN ('APPROVE', 'REJECT', 'SUBMIT', 'RETURN')

UNION ALL

-- 6. Approval Step Approved
SELECT DISTINCT
    BR.REQUISITION_HEADER_ID AS "PurchaseRequisitionId",
    'Approval Step Approved' AS "ActivityName",
    PAH.ACTION_DATE AS "EventTime",
    'Oracle Fusion Financials' AS "SourceSystem",
    SYSTIMESTAMP AS "LastDataUpdate",
    BR.RequesterName,
    BR.DepartmentName,
    BR.RequisitionTotalAmount,
    BR.DOCUMENT_STATUS AS "RequisitionStatus",
    BR.RequiredByDate,
    NULL AS "RejectionReason",
    BR.BusinessUnit
FROM BaseRequisitions BR
JOIN PO_ACTION_HISTORY PAH ON BR.REQUISITION_HEADER_ID = PAH.OBJECT_ID
WHERE PAH.OBJECT_TYPE_CODE = 'REQUISITION' AND PAH.ACTION_CODE = 'APPROVE'

UNION ALL

-- 7. Approval Step Rejected
SELECT DISTINCT
    BR.REQUISITION_HEADER_ID AS "PurchaseRequisitionId",
    'Approval Step Rejected' AS "ActivityName",
    PAH.ACTION_DATE AS "EventTime",
    'Oracle Fusion Financials' AS "SourceSystem",
    SYSTIMESTAMP AS "LastDataUpdate",
    BR.RequesterName,
    BR.DepartmentName,
    BR.RequisitionTotalAmount,
    BR.DOCUMENT_STATUS AS "RequisitionStatus",
    BR.RequiredByDate,
    PAH.NOTE AS "RejectionReason",
    BR.BusinessUnit
FROM BaseRequisitions BR
JOIN PO_ACTION_HISTORY PAH ON BR.REQUISITION_HEADER_ID = PAH.OBJECT_ID
WHERE PAH.OBJECT_TYPE_CODE = 'REQUISITION' AND PAH.ACTION_CODE = 'REJECT'

UNION ALL

-- 8. Approval Step Returned
SELECT DISTINCT
    BR.REQUISITION_HEADER_ID AS "PurchaseRequisitionId",
    'Approval Step Returned' AS "ActivityName",
    PAH.ACTION_DATE AS "EventTime",
    'Oracle Fusion Financials' AS "SourceSystem",
    SYSTIMESTAMP AS "LastDataUpdate",
    BR.RequesterName,
    BR.DepartmentName,
    BR.RequisitionTotalAmount,
    BR.DOCUMENT_STATUS AS "RequisitionStatus",
    BR.RequiredByDate,
    PAH.NOTE AS "RejectionReason",
    BR.BusinessUnit
FROM BaseRequisitions BR
JOIN PO_ACTION_HISTORY PAH ON BR.REQUISITION_HEADER_ID = PAH.OBJECT_ID
WHERE PAH.OBJECT_TYPE_CODE = 'REQUISITION' AND PAH.ACTION_CODE = 'RETURN'

UNION ALL

-- 9. Requisition Approved
SELECT DISTINCT
    BR.REQUISITION_HEADER_ID AS "PurchaseRequisitionId",
    'Requisition Approved' AS "ActivityName",
    PAH.ACTION_DATE AS "EventTime",
    'Oracle Fusion Financials' AS "SourceSystem",
    SYSTIMESTAMP AS "LastDataUpdate",
    BR.RequesterName,
    BR.DepartmentName,
    BR.RequisitionTotalAmount,
    'APPROVED' AS "RequisitionStatus",
    BR.RequiredByDate,
    NULL AS "RejectionReason",
    BR.BusinessUnit
FROM BaseRequisitions BR
JOIN PO_ACTION_HISTORY PAH ON BR.REQUISITION_HEADER_ID = PAH.OBJECT_ID
WHERE PAH.OBJECT_TYPE_CODE = 'REQUISITION' AND PAH.ACTION_CODE = 'FINALLY CLOSE' AND BR.DOCUMENT_STATUS = 'APPROVED'

UNION ALL

-- 10. Requisition Rejected
SELECT DISTINCT
    BR.REQUISITION_HEADER_ID AS "PurchaseRequisitionId",
    'Requisition Rejected' AS "ActivityName",
    PAH.ACTION_DATE AS "EventTime",
    'Oracle Fusion Financials' AS "SourceSystem",
    SYSTIMESTAMP AS "LastDataUpdate",
    BR.RequesterName,
    BR.DepartmentName,
    BR.RequisitionTotalAmount,
    'REJECTED' AS "RequisitionStatus",
    BR.RequiredByDate,
    PAH.NOTE AS "RejectionReason",
    BR.BusinessUnit
FROM BaseRequisitions BR
JOIN PO_ACTION_HISTORY PAH ON BR.REQUISITION_HEADER_ID = PAH.OBJECT_ID
WHERE PAH.OBJECT_TYPE_CODE = 'REQUISITION' AND PAH.ACTION_CODE = 'REJECT'
AND BR.DOCUMENT_STATUS = 'REJECTED'
AND PAH.ACTION_DATE = (SELECT MAX(PAH2.ACTION_DATE) FROM PO_ACTION_HISTORY PAH2 WHERE PAH2.OBJECT_ID = BR.REQUISITION_HEADER_ID AND PAH2.ACTION_CODE = 'REJECT')

UNION ALL

-- 11. Purchase Order Created
SELECT DISTINCT
    BR.REQUISITION_HEADER_ID AS "PurchaseRequisitionId",
    'Purchase Order Created' AS "ActivityName",
    POH.CREATION_DATE AS "EventTime",
    'Oracle Fusion Financials' AS "SourceSystem",
    SYSTIMESTAMP AS "LastDataUpdate",
    BR.RequesterName,
    BR.DepartmentName,
    BR.RequisitionTotalAmount,
    BR.DOCUMENT_STATUS AS "RequisitionStatus",
    BR.RequiredByDate,
    NULL AS "RejectionReason",
    BR.BusinessUnit
FROM BaseRequisitions BR
JOIN POR_REQUISITION_LINES_ALL PRL ON BR.REQUISITION_HEADER_ID = PRL.REQUISITION_HEADER_ID
JOIN PO_DISTRIBUTIONS_ALL POD ON PRL.REQUISITION_LINE_ID = POD.REQUISITION_LINE_ID
JOIN PO_HEADERS_ALL POH ON POD.PO_HEADER_ID = POH.PO_HEADER_ID

UNION ALL

-- 12. Requisition Closed
SELECT DISTINCT
    BR.REQUISITION_HEADER_ID AS "PurchaseRequisitionId",
    'Requisition Closed' AS "ActivityName",
    BR.HEADER_LAST_UPDATE_DATE AS "EventTime",
    'Oracle Fusion Financials' AS "SourceSystem",
    SYSTIMESTAMP AS "LastDataUpdate",
    BR.RequesterName,
    BR.DepartmentName,
    BR.RequisitionTotalAmount,
    'CLOSED' AS "RequisitionStatus",
    BR.RequiredByDate,
    NULL AS "RejectionReason",
    BR.BusinessUnit
FROM BaseRequisitions BR
WHERE BR.DOCUMENT_STATUS = 'CLOSED'

import requests
import csv
import json
from datetime import datetime

class=class="hl-string">"hl-comment"># --- Configuration Settings --- 
class=class="hl-string">"hl-comment"># Replace with your Oracle Fusion instance URL, username, and password.
FUSION_URL = class="hl-string">"https://[your-fusion-instance-url].oraclecloud.com"
USERNAME = class="hl-string">"your_api_user"
PASSWORD = class="hl-string">"your_api_password"

class=class="hl-string">"hl-comment"># Define the date range for the extraction.
START_DATE = class="hl-string">"2023-01-01"
END_DATE = class="hl-string">"2023-06-30"

class=class="hl-string">"hl-comment"># --- Main Extraction Logic ---

def get_requisitions_data():
    class="hl-string">"""Fetches and processes purchase requisition data from Oracle Fusion REST API."""
    
    api_url = fclass="hl-string">"{FUSION_URL}/fscmRestApi/resources/11.13.18.05/purchaseRequisitions"
    
    class=class="hl-string">"hl-comment"># Define the fields to retrieve to optimize the API call
    fields_to_get = [
        class="hl-string">"RequisitionId", class="hl-string">"RequisitionNumber", class="hl-string">"CreationDate", class="hl-string">"SubmittedDate", class="hl-string">"LastUpdateDate",
        class="hl-string">"DocumentStatus", class="hl-string">"PreparerName", class="hl-string">"BusinessUnitName", class="hl-string">"RequisitionTotal", class="hl-string">"NeedByDate",
        class="hl-string">"Department", class="hl-string">"RejectionReason", 
        class="hl-string">"actionHistory(ActionCode,ActionDate,PerformerName)",
        class="hl-string">"lines(PoHeaderId,LastUpdateDate)"
    ]
    
    class=class="hl-string">"hl-comment"># Parameters for the API request
    params = {
        class="hl-string">"q": fclass="hl-string">"CreationDate between '{START_DATE}' and '{END_DATE}'",
        class="hl-string">"fields": class="hl-string">",".join(fields_to_get),
        class="hl-string">"limit": 100,
        class="hl-string">"offset": 0
    }
    
    headers = {
        class="hl-string">'Content-Type': class="hl-string">'application/vnd.oracle.adf.resourceitem+json'
    }
    
    event_log = []
    has_more = True
    total_processed = 0
    now_iso = datetime.utcnow().isoformat() + class="hl-string">'Z'

    while has_more:
        print(fclass="hl-string">"Fetching requisitions from offset {params['offset']}...")
        try:
            response = requests.get(
                api_url, 
                auth=(USERNAME, PASSWORD), 
                params=params, 
                headers=headers
            )
            response.raise_for_status() class=class="hl-string">"hl-comment"># Raise an exception for bad status codes (4xx or 5xx)
        except requests.exceptions.RequestException as e:
            print(fclass="hl-string">"Error fetching data: {e}")
            break

        data = response.json()
        requisitions = data.get(class="hl-string">'items', [])

        if not requisitions:
            print(class="hl-string">"No more requisitions found.")
            break

        for req in requisitions:
            base_event = {
                class="hl-string">'PurchaseRequisitionId': req.get(class="hl-string">'RequisitionNumber'),
                class="hl-string">'RequesterName': req.get(class="hl-string">'PreparerName'),
                class="hl-string">'DepartmentName': req.get(class="hl-string">'Department'),
                class="hl-string">'RequisitionTotalAmount': req.get(class="hl-string">'RequisitionTotal'),
                class="hl-string">'RequisitionStatus': req.get(class="hl-string">'DocumentStatus'),
                class="hl-string">'RequiredByDate': req.get(class="hl-string">'NeedByDate'),
                class="hl-string">'RejectionReason': req.get(class="hl-string">'RejectionReason'),
                class="hl-string">'BusinessUnit': req.get(class="hl-string">'BusinessUnitName'),
                class="hl-string">'SourceSystem': class="hl-string">'Oracle Fusion Financials',
                class="hl-string">'LastDataUpdate': now_iso
            }

            class=class="hl-string">"hl-comment"># 1. Requisition Created
            if req.get(class="hl-string">'CreationDate'):
                event_log.append({**base_event, class="hl-string">'ActivityName': class="hl-string">'Requisition Created', class="hl-string">'EventTime': req[class="hl-string">'CreationDate']})

            class=class="hl-string">"hl-comment"># 2. Requisition Submitted
            if req.get(class="hl-string">'SubmittedDate'):
                event_log.append({**base_event, class="hl-string">'ActivityName': class="hl-string">'Requisition Submitted', class="hl-string">'EventTime': req[class="hl-string">'SubmittedDate']})

            class=class="hl-string">"hl-comment"># 3-8. Approval Workflow Events from actionHistory
            po_created = False
            if class="hl-string">'actionHistory' in req and req[class="hl-string">'actionHistory'] is not None:
                for action in req[class="hl-string">'actionHistory']:
                    activity = None
                    action_code = action.get(class="hl-string">'ActionCode')
                    if action_code == class="hl-string">'SUBMIT':
                        class=class="hl-string">"hl-comment"># This is often the first step in the approval flow
                        activity = class="hl-string">'Approval Step Started'
                    elif action_code == class="hl-string">'APPROVE':
                        activity = class="hl-string">'Approval Step Approved'
                    elif action_code == class="hl-string">'REJECT':
                        activity = class="hl-string">'Approval Step Rejected'
                    elif action_code == class="hl-string">'RETURN':
                        activity = class="hl-string">'Approval Step Returned'
                    elif action_code == class="hl-string">'WITHDRAW':
                        activity = class="hl-string">'Requisition Withdrawn'
                    elif action_code == class="hl-string">'UPDATE':
                        activity = class="hl-string">'Requisition Amended'
                    
                    if activity:
                        event_log.append({**base_event, class="hl-string">'ActivityName': activity, class="hl-string">'EventTime': action.get(class="hl-string">'ActionDate')})

            class=class="hl-string">"hl-comment"># 9-10 & 12. Final Status Events
            final_status = req.get(class="hl-string">'DocumentStatus')
            last_update_date = req.get(class="hl-string">'LastUpdateDate')
            if last_update_date:
                if final_status == class="hl-string">'APPROVED':
                    event_log.append({**base_event, class="hl-string">'ActivityName': class="hl-string">'Requisition Approved', class="hl-string">'EventTime': last_update_date})
                elif final_status == class="hl-string">'REJECTED':
                    event_log.append({**base_event, class="hl-string">'ActivityName': class="hl-string">'Requisition Rejected', class="hl-string">'EventTime': last_update_date})
                elif final_status == class="hl-string">'CLOSED':
                    event_log.append({**base_event, class="hl-string">'ActivityName': class="hl-string">'Requisition Closed', class="hl-string">'EventTime': last_update_date})

            class=class="hl-string">"hl-comment"># 11. Purchase Order Created
            if class="hl-string">'lines' in req and req[class="hl-string">'lines'] is not None:
                for line in req[class="hl-string">'lines']:
                    if line.get(class="hl-string">'PoHeaderId') and not po_created:
                        event_log.append({**base_event, class="hl-string">'ActivityName': class="hl-string">'Purchase Order Created', class="hl-string">'EventTime': line.get(class="hl-string">'LastUpdateDate', last_update_date)})
                        po_created = True class=class="hl-string">"hl-comment"># Create only one PO event per requisition
                        break
        
        total_processed += len(requisitions)
        print(fclass="hl-string">"Processed {total_processed} total requisitions so far.")

        class=class="hl-string">"hl-comment"># Check if there is more data to fetch for pagination
        has_more = data.get(class="hl-string">'hasMore', False)
        if has_more:
            params[class="hl-string">'offset'] += params[class="hl-string">'limit']

    class=class="hl-string">"hl-comment"># Write to CSV
    if event_log:
        filename = class="hl-string">'oracle_fusion_requisitions_event_log.csv'
        fieldnames = list(event_log[0].keys())
        with open(filename, class="hl-string">'w', newline=class="hl-string">'', encoding=class="hl-string">'utf-8') as csvfile:
            writer = csv.DictWriter(csvfile, fieldnames=fieldnames)
            writer.writeheader()
            writer.writerows(event_log)
        print(fclass="hl-string">"\nSuccessfully extracted {len(event_log)} events to {filename}")
    else:
        print(class="hl-string">"\nNo events were generated.")

if __name__ == class="hl-string">"__main__":
    get_requisitions_data()

WITH
source_requisition AS (
    SELECT
        CAST([Requisition identifier attribute] AS VARCHAR(200)) AS PurchaseRequisitionId,
        CAST([Requester name attribute] AS VARCHAR(500)) AS RequesterName,
        CAST([Department attribute] AS VARCHAR(500)) AS DepartmentName,
        CAST([Total amount attribute] AS DECIMAL(38, 10)) AS RequisitionTotalAmount,
        CAST([Status attribute] AS VARCHAR(200)) AS RequisitionStatus,
        CAST([Required by date attribute] AS TIMESTAMP) AS RequiredByDate,
        CAST([Rejection reason attribute] AS VARCHAR(4000)) AS RejectionReason,
        CAST([Business unit attribute] AS VARCHAR(500)) AS BusinessUnit,
        CAST([Creation timestamp attribute] AS TIMESTAMP) AS CreatedAt,
        CAST([Submission timestamp attribute] AS TIMESTAMP) AS SubmittedAt,
        CAST([Withdrawal timestamp attribute] AS TIMESTAMP) AS WithdrawnAt,
        CAST([Approval timestamp attribute] AS TIMESTAMP) AS ApprovedAt,
        CAST([Rejection timestamp attribute] AS TIMESTAMP) AS RejectedAt,
        CAST([Closure timestamp attribute] AS TIMESTAMP) AS ClosedAt,
        CAST([Last update timestamp attribute] AS TIMESTAMP) AS SourceLastUpdate,
        CAST([BICC refresh timestamp attribute] AS TIMESTAMP) AS LastDataUpdate
    FROM [Requisition header extract or view]
    WHERE CAST([Last update timestamp attribute] AS TIMESTAMP) >= CAST('[Start date parameter]' AS TIMESTAMP)
      AND CAST([Last update timestamp attribute] AS TIMESTAMP) < CAST('[End date parameter]' AS TIMESTAMP)
      AND ([Company filter attribute] = '[Company-specific filter]' OR '[Company-specific filter]' = '[All companies]')
      AND ([Document type filter attribute] = '[Document Type filter]' OR '[Document Type filter]' = '[All document types]')
),
source_status_history AS (
    SELECT
        CAST([Requisition identifier attribute] AS VARCHAR(200)) AS PurchaseRequisitionId,
        CAST([Previous status attribute] AS VARCHAR(200)) AS PreviousStatus,
        CAST([New status attribute] AS VARCHAR(200)) AS NewStatus,
        CAST([Status change timestamp attribute] AS TIMESTAMP) AS StatusChangedAt,
        CAST([Rejection reason attribute] AS VARCHAR(4000)) AS RejectionReason,
        CAST([Requester name attribute] AS VARCHAR(500)) AS RequesterName,
        CAST([Department attribute] AS VARCHAR(500)) AS DepartmentName,
        CAST([Total amount attribute] AS DECIMAL(38, 10)) AS RequisitionTotalAmount,
        CAST([Required by date attribute] AS TIMESTAMP) AS RequiredByDate,
        CAST([Business unit attribute] AS VARCHAR(500)) AS BusinessUnit,
        CAST([BICC refresh timestamp attribute] AS TIMESTAMP) AS LastDataUpdate
    FROM [Requisition status history extract or view]
    WHERE CAST([Status change timestamp attribute] AS TIMESTAMP) >= CAST('[Start date parameter]' AS TIMESTAMP)
      AND CAST([Status change timestamp attribute] AS TIMESTAMP) < CAST('[End date parameter]' AS TIMESTAMP)
),
source_amendments AS (
    SELECT
        CAST([Requisition identifier attribute] AS VARCHAR(200)) AS PurchaseRequisitionId,
        CAST([Amendment timestamp attribute] AS TIMESTAMP) AS AmendedAt,
        CAST([Requester name attribute] AS VARCHAR(500)) AS RequesterName,
        CAST([Department attribute] AS VARCHAR(500)) AS DepartmentName,
        CAST([Total amount attribute] AS DECIMAL(38, 10)) AS RequisitionTotalAmount,
        CAST([Status attribute] AS VARCHAR(200)) AS RequisitionStatus,
        CAST([Required by date attribute] AS TIMESTAMP) AS RequiredByDate,
        CAST([Rejection reason attribute] AS VARCHAR(4000)) AS RejectionReason,
        CAST([Business unit attribute] AS VARCHAR(500)) AS BusinessUnit,
        CAST([BICC refresh timestamp attribute] AS TIMESTAMP) AS LastDataUpdate
    FROM [Requisition amendment or version extract or view]
    WHERE CAST([Amendment timestamp attribute] AS TIMESTAMP) >= CAST('[Start date parameter]' AS TIMESTAMP)
      AND CAST([Amendment timestamp attribute] AS TIMESTAMP) < CAST('[End date parameter]' AS TIMESTAMP)
),
source_approval_history AS (
    SELECT
        CAST([Requisition identifier attribute] AS VARCHAR(200)) AS PurchaseRequisitionId,
        CAST([Approval step identifier attribute] AS VARCHAR(200)) AS ApprovalStepId,
        CAST([Approver or approval group attribute] AS VARCHAR(500)) AS ApproverName,
        CAST([Approval action attribute] AS VARCHAR(200)) AS ApprovalAction,
        CAST([Approval assignment timestamp attribute] AS TIMESTAMP) AS ApprovalStartedAt,
        CAST([Approval action timestamp attribute] AS TIMESTAMP) AS ApprovalActionAt,
        CAST([Rejection reason attribute] AS VARCHAR(4000)) AS RejectionReason,
        CAST([Requester name attribute] AS VARCHAR(500)) AS RequesterName,
        CAST([Department attribute] AS VARCHAR(500)) AS DepartmentName,
        CAST([Total amount attribute] AS DECIMAL(38, 10)) AS RequisitionTotalAmount,
        CAST([Status attribute] AS VARCHAR(200)) AS RequisitionStatus,
        CAST([Required by date attribute] AS TIMESTAMP) AS RequiredByDate,
        CAST([Business unit attribute] AS VARCHAR(500)) AS BusinessUnit,
        CAST([BICC refresh timestamp attribute] AS TIMESTAMP) AS LastDataUpdate
    FROM [Approval workflow history extract or view]
    WHERE COALESCE(CAST([Approval assignment timestamp attribute] AS TIMESTAMP), CAST([Approval action timestamp attribute] AS TIMESTAMP)) >= CAST('[Start date parameter]' AS TIMESTAMP)
      AND COALESCE(CAST([Approval assignment timestamp attribute] AS TIMESTAMP), CAST([Approval action timestamp attribute] AS TIMESTAMP)) < CAST('[End date parameter]' AS TIMESTAMP)
),
source_purchase_orders AS (
    SELECT
        CAST([Requisition identifier attribute] AS VARCHAR(200)) AS PurchaseRequisitionId,
        CAST([Purchase order creation timestamp attribute] AS TIMESTAMP) AS PurchaseOrderCreatedAt,
        CAST([Requester name attribute] AS VARCHAR(500)) AS RequesterName,
        CAST([Department attribute] AS VARCHAR(500)) AS DepartmentName,
        CAST([Total amount attribute] AS DECIMAL(38, 10)) AS RequisitionTotalAmount,
        CAST([Status attribute] AS VARCHAR(200)) AS RequisitionStatus,
        CAST([Required by date attribute] AS TIMESTAMP) AS RequiredByDate,
        CAST([Rejection reason attribute] AS VARCHAR(4000)) AS RejectionReason,
        CAST([Business unit attribute] AS VARCHAR(500)) AS BusinessUnit,
        CAST([BICC refresh timestamp attribute] AS TIMESTAMP) AS LastDataUpdate
    FROM [Purchase order reference extract or view]
    WHERE CAST([Purchase order creation timestamp attribute] AS TIMESTAMP) >= CAST('[Start date parameter]' AS TIMESTAMP)
      AND CAST([Purchase order creation timestamp attribute] AS TIMESTAMP) < CAST('[End date parameter]' AS TIMESTAMP)
),
events AS (
    SELECT PurchaseRequisitionId, 'Requisition Created' AS ActivityName, CreatedAt AS EventTime, RequesterName, DepartmentName, RequisitionTotalAmount, RequisitionStatus, RequiredByDate, RejectionReason, BusinessUnit, LastDataUpdate FROM source_requisition WHERE CreatedAt IS NOT NULL
    UNION ALL
    SELECT h.PurchaseRequisitionId, 'Requisition Submitted', h.StatusChangedAt, h.RequesterName, h.DepartmentName, h.RequisitionTotalAmount, h.NewStatus, h.RequiredByDate, h.RejectionReason, h.BusinessUnit, h.LastDataUpdate FROM source_status_history h WHERE LOWER(h.NewStatus) IN ('pending approval', 'submitted', 'pending') AND LOWER(COALESCE(h.PreviousStatus, '')) IN ('incomplete', 'draft')
    UNION ALL
    SELECT h.PurchaseRequisitionId, 'Requisition Withdrawn', h.StatusChangedAt, h.RequesterName, h.DepartmentName, h.RequisitionTotalAmount, h.NewStatus, h.RequiredByDate, h.RejectionReason, h.BusinessUnit, h.LastDataUpdate FROM source_status_history h WHERE LOWER(h.NewStatus) IN ('withdrawn', 'cancelled', 'canceled')
    UNION ALL
    SELECT a.PurchaseRequisitionId, 'Requisition Amended', a.AmendedAt, a.RequesterName, a.DepartmentName, a.RequisitionTotalAmount, a.RequisitionStatus, a.RequiredByDate, a.RejectionReason, a.BusinessUnit, a.LastDataUpdate FROM source_amendments a WHERE a.AmendedAt IS NOT NULL
    UNION ALL
    SELECT a.PurchaseRequisitionId, 'Approval Step Started', a.ApprovalStartedAt, a.RequesterName, a.DepartmentName, a.RequisitionTotalAmount, a.RequisitionStatus, a.RequiredByDate, a.RejectionReason, a.BusinessUnit, a.LastDataUpdate FROM source_approval_history a WHERE a.ApprovalStartedAt IS NOT NULL
    UNION ALL
    SELECT a.PurchaseRequisitionId, 'Approval Step Approved', a.ApprovalActionAt, a.RequesterName, a.DepartmentName, a.RequisitionTotalAmount, a.RequisitionStatus, a.RequiredByDate, a.RejectionReason, a.BusinessUnit, a.LastDataUpdate FROM source_approval_history a WHERE a.ApprovalActionAt IS NOT NULL AND LOWER(a.ApprovalAction) IN ('approved', 'approve')
    UNION ALL
    SELECT a.PurchaseRequisitionId, 'Approval Step Rejected', a.ApprovalActionAt, a.RequesterName, a.DepartmentName, a.RequisitionTotalAmount, a.RequisitionStatus, a.RequiredByDate, a.RejectionReason, a.BusinessUnit, a.LastDataUpdate FROM source_approval_history a WHERE a.ApprovalActionAt IS NOT NULL AND LOWER(a.ApprovalAction) IN ('rejected', 'reject')
    UNION ALL
    SELECT a.PurchaseRequisitionId, 'Approval Step Returned', a.ApprovalActionAt, a.RequesterName, a.DepartmentName, a.RequisitionTotalAmount, a.RequisitionStatus, a.RequiredByDate, a.RejectionReason, a.BusinessUnit, a.LastDataUpdate FROM source_approval_history a WHERE a.ApprovalActionAt IS NOT NULL AND LOWER(a.ApprovalAction) IN ('returned', 'return', 'sent back', 'send back')
    UNION ALL
    SELECT h.PurchaseRequisitionId, 'Requisition Approved', h.StatusChangedAt, h.RequesterName, h.DepartmentName, h.RequisitionTotalAmount, h.NewStatus, h.RequiredByDate, h.RejectionReason, h.BusinessUnit, h.LastDataUpdate FROM source_status_history h WHERE LOWER(h.NewStatus) = 'approved'
    UNION ALL
    SELECT h.PurchaseRequisitionId, 'Requisition Rejected', h.StatusChangedAt, h.RequesterName, h.DepartmentName, h.RequisitionTotalAmount, h.NewStatus, h.RequiredByDate, h.RejectionReason, h.BusinessUnit, h.LastDataUpdate FROM source_status_history h WHERE LOWER(h.NewStatus) = 'rejected'
    UNION ALL
    SELECT p.PurchaseRequisitionId, 'Purchase Order Created', p.PurchaseOrderCreatedAt, p.RequesterName, p.DepartmentName, p.RequisitionTotalAmount, p.RequisitionStatus, p.RequiredByDate, p.RejectionReason, p.BusinessUnit, p.LastDataUpdate FROM source_purchase_orders p WHERE p.PurchaseOrderCreatedAt IS NOT NULL
    UNION ALL
    SELECT h.PurchaseRequisitionId, 'Requisition Closed', h.StatusChangedAt, h.RequesterName, h.DepartmentName, h.RequisitionTotalAmount, h.NewStatus, h.RequiredByDate, h.RejectionReason, h.BusinessUnit, h.LastDataUpdate FROM source_status_history h WHERE LOWER(h.NewStatus) IN ('closed', 'finally closed', 'complete', 'completed')
)
SELECT
    PurchaseRequisitionId,
    ActivityName,
    EventTime,
    'Oracle Fusion Financials' AS SourceSystem,
    LastDataUpdate,
    RequesterName,
    DepartmentName,
    RequisitionTotalAmount,
    RequisitionStatus,
    RequiredByDate,
    RejectionReason,
    BusinessUnit
FROM events
WHERE PurchaseRequisitionId IS NOT NULL
  AND EventTime IS NOT NULL
ORDER BY PurchaseRequisitionId, EventTime, ActivityName;