Query to get details for Vacation Rule /Delegation in oracle apps

This query will give you details for user if any vacation rule is set.

select * from apps.WF_ROUTING_RULES
where role = &P_USER_NAME;

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Below given query used to get details of notification send to delegates using vacation rules.

SELECT
    wit.display_name workflow_process,
    nvl(wi.user_key, (
        SELECT
            user_key
        FROM
            apps.wf_items w
        WHERE
            w.item_key = wi.parent_item_key
            AND   w.item_type = wi.item_type
    ) ) document_number,
    from_role,
    recipient_role,
    from_user,
    to_user,
    status,
    mail_status,
    original_recipient,    
    wias.activity_result_code notification_status,
    wn.subject,
    wn.begin_date notification_begin_date,
    wn.end_date notification_end_date,
    wrr.begin_date delegation_start_date,
    wrr.end_date delegation_end_date
FROM
    apps.wf_notifications wn,
    apps.wf_routing_rules wr,
    apps.wf_routing_rules wrr,
    apps.wf_item_activity_statuses wias,
    apps.wf_items wi,
    apps.wf_item_types_vl wit
WHERE
    wn.from_role =wr.role
    AND   wrr.role = wn.from_role
    AND   wrr.action_argument = wn.recipient_role
    AND   wias.item_key = wn.item_key                       
    AND   wias.notification_id = wn.notification_id
    AND   wn.item_key = wi.item_key
    AND   wn.message_type = wi.item_type
    AND   wit.name = wi.item_type
    AND   original_recipient =&P_USER_NAME
    AND   wn.begin_date > SYSDATE - 10
ORDER BY
    original_recipient,
    wn.begin_date DESC;