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https://issues.apache.org/jira/browse/SPARK-25902?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16671000#comment-16671000
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Apache Spark commented on SPARK-25902:
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User 'kevinyu98' has created a pull request for this issue:
https://github.com/apache/spark/pull/22918
> Support for dates with milliseconds in Arrow bindings
> -----------------------------------------------------
>
> Key: SPARK-25902
> URL: https://issues.apache.org/jira/browse/SPARK-25902
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.3.2
> Reporter: Javier Luraschi
> Priority: Major
>
> Currently, the Apache Arrow bindings for Java only support `Date` with the
> metric set to `DateUnit.DAY`, see
> [ArrowUtils.scala#L72|https://github.com/apache/spark/blob/8c2edf46d0f89e5ec54968218d89f30a3f8190bc/sql/core/src/main/scala/org/apache/spark/sql/execution/arrow/ArrowUtils.scala#L72].
> However, the Spark Arrow bindings for `R` are adding support to map `POSIXct`
> to `Date` using `DateUnit.MILLISECOND`, with the following code triggering
> the following warning:
>
> {code:java}
> devtools::install_github("apache/arrow", subdir = "r")
> devtools::install_github("rstudio/sparklyr", ref = "feature/arrow")
> Sys.setenv("SPARK_HOME_VERSION" = "2.3.2")
> library(sparklyr)
> library(arrow)
> sc <- spark_connect(master = "local", spark_home = "<path-to-spark-sources>")
> dates <- data.frame(dates = c(
> as.POSIXlt(Sys.time(), "GMT"),
> as.POSIXlt(Sys.time(), "EST"))
> )
> dates_tbl <- sdf_copy_to(sc, dates, overwrite = T){code}
>
>
> {code:java}
> Arrow disabled due to columns: dates
> {code}
> Which means that Arrow serialization gets disabled due to the following Spark
> exception being thrown:
> {code:java}
> java.lang.UnsupportedOperationException: Unsupported data type:
> Date(MILLISECOND)
> {code}
>
>
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