我在teradata中有一个表，一列update_date被定义为DATE。格式为YYYYMMDD。我需要将HDFS中的文件上传到表中。这些文件是逗号分隔的文本文件。与update_date对应的列是格式为＆＃39; YYYYMMDD＆＃39;的字符串。
当我尝试使用命令导出数据时：
sqoop export --connect jdbc:teradata://tdwc/DATABASE=sandbox --username xxxx --password yyyy --table mytable --export-dir hftp://gdoop-namenode/path/to/myfiles/
命令失败，错误
java.io.IOException: Can't export data, please check failed map task logs
at org.apache.sqoop.mapreduce.TextExportMapper.map(TextExportMapper.java:112)
at org.apache.sqoop.mapreduce.TextExportMapper.map(TextExportMapper.java:39)
at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:140)
at org.apache.sqoop.mapreduce.AutoProgressMapper.run(AutoProgressMapper.java:64)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:672)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:330)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1438)
at org.apache.hadoop.mapred.Child.main(Child.java:262)
Caused by: java.lang.RuntimeException: Can't parse input data: '20160129'
如何在不更改表格架构的情况下解决此问题？