Github user olarayej commented on a diff in the pull request:
https://github.com/apache/spark/pull/11336#discussion_r82910308
--- Diff: R/pkg/R/functions.R ---
@@ -2836,7 +2845,11 @@ setMethod("lpad", signature(x = "Column", len =
"numeric", pad = "character"),
setMethod("rand", signature(seed = "missing"),
function(seed) {
jc <- callJStatic("org.apache.spark.sql.functions", "rand")
- column(jc)
+
+ # By assigning a one-row data.frame, the result of this
function can be collected
+ # returning a one-element Column
+ df <- as.DataFrame(sparkRSQL.init(), data.frame(0))
--- End diff --
See my comment from March 30 to illustrate why this is needed. I'll change
sparkRSQL.init() to sparkR.session(). Thanks for catching this!
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