Github user felixcheung commented on a diff in the pull request:
https://github.com/apache/spark/pull/20464#discussion_r165571511
--- Diff: R/pkg/R/column.R ---
@@ -169,7 +169,7 @@ setMethod("alias",
#' @note substr since 1.4.0
setMethod("substr", signature(x = "Column"),
function(x, start, stop) {
- jc <- callJMethod(x@jc, "substr", as.integer(start - 1),
as.integer(stop - start + 1))
+ jc <- callJMethod(x@jc, "substr", as.integer(start),
as.integer(stop - start + 1))
--- End diff --
question:
- is there a way to make the behavior the same before this change for any
caller calling substr with common index like 0
- why consider other changes as a follow up and not here?
https://github.com/apache/spark/pull/20464#issuecomment-362162014
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