Emm...I think you can do a df.map and store each column value to your list.
fightf...@163.com
发件人： zml张明磊
发送时间： 2015-12-25 15:33
收件人： user@spark.apache.org
抄送： dev-subscr...@spark.apache.org
主题： How can I get the column data based on specific column name and then stored
these data in array or list ?
Hi,
I am a new to Scala and Spark and trying to find relative API in
DataFrame to solve my problem as title described. However, I just only find
this API DataFrame.col(colName : String) : Column which returns an object of
Column. Not the content. If only DataFrame support such API which like
Column.toArray : Type is enough for me. But now, it doesn’t. How can I do can
achieve this function ?
Thanks,
Minglei.
