Github user felixcheung commented on a diff in the pull request:
https://github.com/apache/spark/pull/23131#discussion_r236763355
--- Diff: R/pkg/R/DataFrame.R ---
@@ -2732,6 +2732,20 @@ setMethod("union",
dataFrame(unioned)
})
+#' Return a new SparkDataFrame containing the union of rows
+#'
+#' This is an alias for `union`.
--- End diff --
also backtick doesn't format with roxygen2. this should be
```
This is an alias for \code{union}.
```
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