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https://issues.apache.org/jira/browse/SPARK-17608?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15507227#comment-15507227
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Miao Wang commented on SPARK-17608:
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Let me take a look. Thanks!
> Long type has incorrect serialization/deserialization
> -----------------------------------------------------
>
> Key: SPARK-17608
> URL: https://issues.apache.org/jira/browse/SPARK-17608
> Project: Spark
> Issue Type: Bug
> Components: SparkR
> Affects Versions: 2.0.0
> Reporter: Thomas Powell
>
> Am hitting issues when using {{dapply}} on a data frame that contains a
> {{bigint}} in its schema. When this is converted to a SparkR data frame a
> "bigint" gets converted to a R {{numeric}} type:
> https://github.com/apache/spark/blob/master/R/pkg/R/types.R#L25.
> However, the R {{numeric}} type gets converted to
> {{org.apache.spark.sql.types.DoubleType}}:
> https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/api/r/SQLUtils.scala#L97.
> The two directions therefore aren't compatible. If I use the same schema when
> using dapply (and just an identity function) I will get type collisions
> because the output type is a double but the schema expects a bigint.
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