The following lines contain the word 'select', 'insert', 'update' or 'delete':
l_debug_info := 'Update Workflow Flag to Done';
UPDATE ap_invoices_interface
SET workflow_flag = 'D'
WHERE invoice_id = l_invoice_id;
l_debug_info := 'Update Workflow Flag to Selected';
UPDATE ap_invoices_interface
SET workflow_flag = 'S'
WHERE invoice_id = p_invoice_id;