Github user zero323 commented on a diff in the pull request:
https://github.com/apache/spark/pull/17783#discussion_r113927479
--- Diff: R/pkg/R/column.R ---
@@ -302,3 +301,65 @@ setMethod("otherwise",
jc <- callJMethod(x@jc, "otherwise", value)
column(jc)
})
+
+#' \%<=>\%
+#'
+#' Equality test that is safe for null values.
+#'
+#' Can be used, unlike standard equality operator, to perform null-safe
joins.
+#' Equivalent to Scala \code{Column.<=>} and \code{Column.eqNullSafe}.
+#'
+#' @param x a Column
+#' @param value a value to compare
+#' @rdname eq_null_safe
+#' @name %<=>%
+#' @aliases %<=>%,Column-method
+#' @export
+#' @examples
+#' \dontrun{
+#' df1 <- createDataFrame(data.frame(
+#' x = c(1, NA, 3, NA), y = c(2, 6, 3, NA)
+#' ))
+#'
+#' head(select(df1, df1$x == df1$y, df1$x %<=>% df1$y))
+#' ## (x = y) (x <=> y)
+#' ##1 FALSE FALSE
+#' ##2 NA FALSE
+#' ##3 TRUE TRUE
+#' ##4 NA TRUE
+#'
+#' df2 <- createDataFrame(data.frame(y = c(3, NA)))
+#' count(join(df1, df2, df1$y == df2$y))
+#' ## [1] 1
+#'
+#' count(join(df1, df2, df1$y %<=>% df2$y))
+#' ## [1] 2
+#' }
+#' @note \%<=>\% since 2.3.0
+setMethod("%<=>%",
+ signature(x = "Column", value = "ANY"),
+ function(x, value) {
+ value <- if (class(value) == "Column") { value@jc } else {
value }
+ jc <- callJMethod(x@jc, "eqNullSafe", value)
+ column(jc)
+ })
+
+#' !
+#'
+#' @rdname not
+#' @aliases !,Column-method
+#' @export
+#' @examples
+#' \dontrun{
+#' df <- createDataFrame(data.frame(x = c(-1, 0, 1)))
+#'
+#' head(select(df, !column("x") > 0))
+#' ## (NOT (x > 0.0))
+#' ##1 TRUE
+#' ##2 TRUE
+#' ##3 FALSE
+#' }
+#' @note ! since 2.3.0
+setMethod("!",
--- End diff --
https://cran.r-project.org/web/packages/lintr/, do we use something else
here?
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastruct...@apache.org or file a JIRA ticket
with INFRA.
---
---------------------------------------------------------------------
To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org
For additional commands, e-mail: reviews-h...@spark.apache.org
