df=sqlContext.read.format('jdbc')
   .options(driver='com.mysql.jdbc.Driver',url="""jdbc:mysql://<host>:3306/<>db?user=<usr>&password=<pass>""",
         dbtable='tbl',
         numPartitions=4 )
   .load()


df2=df.withColumn('updated_date',to_date(df.updated_at))
df2.write.parquet(path='s3n://parquet_location',mode='append',partitionBy=['updated_date'])

partitionColumn,
lowerBound,
upperBound,
numPartitions