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https://issues.apache.org/jira/browse/SPARK-21791?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16237095#comment-16237095
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Apache Spark commented on SPARK-21791:
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User 'dongjoon-hyun' has created a pull request for this issue:
https://github.com/apache/spark/pull/19651
> ORC should support column names with dot
> ----------------------------------------
>
> Key: SPARK-21791
> URL: https://issues.apache.org/jira/browse/SPARK-21791
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.0.0, 2.1.0, 2.2.0
> Reporter: Dongjoon Hyun
> Priority: Major
>
> *PARQUET*
> {code}
> scala> Seq(Some(1), None).toDF("col.dots").write.parquet("/tmp/parquet_dot")
> scala> spark.read.parquet("/tmp/parquet_dot").show
> +--------+
> |col.dots|
> +--------+
> | 1|
> | null|
> +--------+
> {code}
> *ORC*
> {code}
> scala> Seq(Some(1), None).toDF("col.dots").write.orc("/tmp/orc_dot")
> scala> spark.read.orc("/tmp/orc_dot").show
> org.apache.spark.sql.catalyst.parser.ParseException:
> mismatched input '.' expecting ':'(line 1, pos 10)
> == SQL ==
> struct<col.dots:int>
> ----------^^^
> {code}
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