nealrichardson commented on a change in pull request #9561:
URL: https://github.com/apache/arrow/pull/9561#discussion_r583972560
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File path: r/R/dataset-partition.R
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@@ -72,19 +77,22 @@ HivePartitioning$create <- dataset___HivePartitioning
#' Because fields are named in the path segments, order of fields passed to
#' `hive_partition()` does not matter.
#' @param ... named list of [data types][data-type], passed to [schema()]
+#' @param null_fallback character to be used in place of `NA` and `NULL` values
+#' in columns that are being partitioned by. (default:
+#' `"__HIVE_DEFAULT_PARTITION__"`)
Review comment:
I guess my question was also along the lines of, if Spark uses this,
where does it come from and how is it configured there? If there's an env var
you set to configure how those pick up this value, we should probably also look
for that env var.
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