GitHub user zhichao-li opened a pull request:
https://github.com/apache/spark/pull/8811
[SPARK-10656][SQL]fix selection fails when a column has special characters
Best explained with this example:
val df = sqlContext.read.json(sqlContext.sparkContext.makeRDD(
"""{"a.b": "c", "d": "e" }""" :: Nil))
df.select("*").show() //successful
df.select(df("*")).show() //throws exception
df.withColumnRenamed("d", "f").show() //also fails
This PR address this by adding back tick for the column names.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/zhichao-li/spark specialChars
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/8811.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #8811
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commit 2fa0aa69e92b69ab9433e5ced4e6fd1b4047cb70
Author: zhichao.li <[email protected]>
Date: 2015-09-18T07:13:31Z
fix selection fails when a column has special characters
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