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Hyukjin Kwon edited comment on SPARK-16896 at 8/9/16 9:57 AM: -------------------------------------------------------------- [~nlauchande] Just FYI, actual codes that need to be corrected will be around [here|https://github.com/apache/spark/blob/cb1b9d34f37a5574de43f61e7036c4b8b81defbf/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/csv/CSVFileFormat.scala#L61-L67]. Maybe we should check the duplication and then give some numbers. I haven't checked the behaviour in R though. Also, please make sure for a test. I believe we usually need a test for a patch. was (Author: hyukjin.kwon): [~nlauchande] Just FYI, actual codes that need to be corrected will be around [here|https://github.com/apache/spark/blob/cb1b9d34f37a5574de43f61e7036c4b8b81defbf/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/csv/CSVFileFormat.scala#L61-L67]. Maybe we should check the duplication and then give some numbers. I haven't checked the behaviour in R though. Also, please make sure that we need a test usually for a path. > Loading csv with duplicate column names > --------------------------------------- > > Key: SPARK-16896 > URL: https://issues.apache.org/jira/browse/SPARK-16896 > Project: Spark > Issue Type: Bug > Components: SQL > Affects Versions: 2.0.0 > Reporter: Aseem Bansal > > It would be great if the library allows us to load csv with duplicate column > names. I understand that having duplicate columns in the data is odd but > sometimes we get data that has duplicate columns. Getting upstream data like > that can happen. We may choose to ignore them but currently there is no way > to drop those as we are not able to load them at all. Currently as a > pre-processing I loaded the data into R, changed the column names and then > make a fixed version with which Spark Java API can work. > But if talk about other options, e.g. R has read.csv which automatically > takes care of such situation by appending a number to the column name. > Also case sensitivity in column names can also cause problems. I mean if we > have columns like > ColumnName, columnName > I may want to have them as separate. But the option to do this is not > documented. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org