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From "Apache Spark (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-12988) Can't drop columns that contain dots
Date Wed, 25 May 2016 22:25:13 GMT

    [ https://issues.apache.org/jira/browse/SPARK-12988?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15300991#comment-15300991
] 

Apache Spark commented on SPARK-12988:
--------------------------------------

User 'clockfly' has created a pull request for this issue:
https://github.com/apache/spark/pull/13306

> Can't drop columns that contain dots
> ------------------------------------
>
>                 Key: SPARK-12988
>                 URL: https://issues.apache.org/jira/browse/SPARK-12988
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 1.6.0
>            Reporter: Michael Armbrust
>
> Neither of theses works:
> {code}
> val df = Seq((1, 1)).toDF("a_b", "a.c")
> df.drop("a.c").collect()
> df: org.apache.spark.sql.DataFrame = [a_b: int, a.c: int]
> {code}
> {code}
> val df = Seq((1, 1)).toDF("a_b", "a.c")
> df.drop("`a.c`").collect()
> df: org.apache.spark.sql.DataFrame = [a_b: int, a.c: int]
> {code}
> Given that you can't use drop to drop subfields, it seems to me that we should treat
the column name literally (i.e. as though it is wrapped in back ticks).



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