nealrichardson commented on a change in pull request #11552:
URL: https://github.com/apache/arrow/pull/11552#discussion_r737726846
##########
File path: r/R/dataset-write.R
##########
@@ -38,6 +38,16 @@
#' will yield `"part-0.feather", ...`.
#' @param hive_style logical: write partition segments as Hive-style
#' (`key1=value1/key2=value2/file.ext`) or as just bare values. Default is
`TRUE`.
+#' @param existing_data_behavior The behavior to use when there is already data
+#' in the destination directory. Must be one of "overwrite", "error", or
+#' "delete_matching".
+#' - "overwrite" (the default) then any new files created will overwrite
+#' existing files
+#' - "error" then the operation will fail if the destination directory is not
+#' empty
+#' - "delete_matching" then the writer will delete any existing partitions
+#' if data is going to be written to those partitions and will leave alone
Review comment:
```suggestion
#' if data is going to be written to those partitions and will leave alone
```
##########
File path: r/R/dataset-write.R
##########
@@ -38,6 +38,16 @@
#' will yield `"part-0.feather", ...`.
#' @param hive_style logical: write partition segments as Hive-style
#' (`key1=value1/key2=value2/file.ext`) or as just bare values. Default is
`TRUE`.
+#' @param existing_data_behavior The behavior to use when there is already data
+#' in the destination directory. Must be one of "overwrite", "error", or
+#' "delete_matching".
+#' - "overwrite" (the default) then any new files created will overwrite
+#' existing files
+#' - "error" then the operation will fail if the destination directory is not
+#' empty
+#' - "delete_matching" then the writer will delete any existing partitions
Review comment:
```suggestion
#' - "delete_matching" then the writer will delete any existing partitions
```
##########
File path: r/R/dataset-write.R
##########
@@ -38,6 +38,16 @@
#' will yield `"part-0.feather", ...`.
#' @param hive_style logical: write partition segments as Hive-style
#' (`key1=value1/key2=value2/file.ext`) or as just bare values. Default is
`TRUE`.
+#' @param existing_data_behavior The behavior to use when there is already data
+#' in the destination directory. Must be one of "overwrite", "error", or
+#' "delete_matching".
+#' - "overwrite" (the default) then any new files created will overwrite
Review comment:
```suggestion
#' - "overwrite" (the default) then any new files created will overwrite
```
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