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Posted to issues@spark.apache.org by "Dongjoon Hyun (JIRA)" <ji...@apache.org> on 2016/07/13 19:54:20 UTC
[jira] [Comment Edited] (SPARK-16466) names() function allows
creation of column name containing "-". filter() function subsequently
fails
[ https://issues.apache.org/jira/browse/SPARK-16466?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15375629#comment-15375629 ]
Dongjoon Hyun edited comment on SPARK-16466 at 7/13/16 7:53 PM:
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Hi, [~neil@dewar-us.com].
Could you close this issue if you agree?
was (Author: dongjoon):
Hi, [~neil@dewar-us.com].
Could you close this PR if you agree?
> names() function allows creation of column name containing "-". filter() function subsequently fails
> -----------------------------------------------------------------------------------------------------
>
> Key: SPARK-16466
> URL: https://issues.apache.org/jira/browse/SPARK-16466
> Project: Spark
> Issue Type: Bug
> Components: SparkR
> Affects Versions: 1.6.1
> Environment: Databricks.com
> Reporter: Neil Dewar
> Priority: Minor
>
> If I assign names to a DataFrame using the names() function, it allows the introduction of "-" characters that caused the filter() function to subsequently fail. I am unclear if other special characters cause similar problems.
> Example:
> sdfCar <- createDataFrame(sqlContext, mtcars)
> names(sdfCar) <- c("mpg", "cyl", "disp", "hp", "drat", "wt", "qsec", "vs", "am", "gear", "carb-count") # note: carb renamed to carb-count
> sdfCar3 <- filter(sdfCar, carb-count==4)
> Above fails with error: failure: identifier expected carb-count==4. This logic appears to be assuming that the "-" in the column name is a minus sign.
> I am unsure if the problem here is that "-" is illegal in a column name, or if the filter function should be able to handle "-" in a column name, but one or the other must be wrong.
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