title: how to read a leading zero number to dataframe in pyspark
body: <p>I am reading an xml which has leading zero values(I'm not adding any schema as I am not sure about the schema of the data). but when i read using databricks spark xml lib, I am seeing the number is reading as long datatype and the leading zeros are no more added to it..</p>
  <p>Is there any way to read the leading zero number as it is?</p>
  <p>eg:
  001234</p>
  <h2>i am getting the result as
  number</h2>
  <p>1234</p>
  <h2>expected result is :
  number</h2>
  <p>001234
  The value is not a fixed length.</p>