The following lines contain the word 'select', 'insert', 'update' or 'delete':
SELECT 1
INTO dummy
FROM dual
WHERE X_Effectivity_Date >
(SELECT nvl(max(effectivity_date), X_Effectivity_Date-1)
FROM mtl_rtg_item_revisions
WHERE inventory_item_id = X_Inventory_Item_Id
AND organization_id = X_Organization_Id
AND process_revision < X_Process_Revision)
AND X_Effectivity_Date <
(SELECT nvl(min(effectivity_date), X_Effectivity_Date+1)
FROM mtl_rtg_item_revisions
WHERE inventory_item_id = X_Inventory_Item_Id
and organization_id = X_Organization_Id
and process_revision > X_Process_Revision);
SELECT 1
INTO dummy
FROM dual
WHERE not exists (SELECT 1 from mtl_rtg_item_revisions
WHERE organization_id = X_Organization_Id
AND inventory_item_id = X_Inventory_Item_Id
AND process_revision = X_Process_Revision
);