title: Sqoop Incremental append mode not importing null rows for --check-column, This columns is timestamp and has null value
body: <p>I am trying to do incremental import initially using following command.</p>
  
  <p>sqoop import --connect jdbc:oracle:thin:@orau20:1555:XXX --username XXXX --password XXXX --table emp   -fields-terminated-by '\001' --escaped-by '\' --input-null-string "\\N"  --input-null-non-string "\\N"  --target-dir /user/xxx/Test/emp --incremental append --check-column dttm_stamp_sec -m 1</p>
  
  <p>Here i found some of the records are missing which dttm_stamp_sec is null records. This column has some null records and those records are not importing from oracle to hadoop. Any help is appreciated.</p>