回复: How can I get the column data based on specific column name and then stored these data in array or list ?

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

Re: How can I get the column data based on specific column name and then stored these data in array or list ?

If you drop other columns (or map to a new df with only that column) and call collect i think you will get what you want. On Fri, 25 Dec 2015 at 10:26 fightf...@163.com wrote: > Emm...I think you can do a df.map and store each column value to your list. > >

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