old_contents: from __future__ import unicode_literals
  import frappe
  
  def execute():
  	frappe.reload_doc('setup','doctype','sales_person')
  	frappe.db.sql("""update `tabSales Person` set enabled=1 
  		where employee IN (select employee from tabEmployee where status != "Left")""")
new_contents: from __future__ import unicode_literals
  import frappe
  
  def execute():
  	frappe.reload_doc('setup','doctype','sales_person')
  	frappe.db.sql("""update `tabSales Person` set enabled=1 
  		where (employee is null or employee = '' 
  			or employee IN (select employee from tabEmployee where status != "Left"))""")
  
subject: Update set_sales_person_status.py