Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/17192#discussion_r105101799
--- Diff: R/pkg/inst/tests/testthat/test_sparkSQL.R ---
@@ -1339,6 +1339,11 @@ test_that("column functions", {
expect_equal(collect(select(df, bround(df$x, 0)))[[1]][2], 4)
# Test to_json(), from_json()
+ arr <- list(listToStruct(list("name" = "bob")))
+ df <- as.DataFrame(list(listToStruct(list("people" = arr))))
+ j <- collect(select(df, alias(to_json(df$people), "json")))
+ expect_equal(j[order(j$json), ][1], "[{\"name\":\"bob\"}]")
+
--- End diff --
Sure, let me add it if I find a better way (it seems `listToStruct` is even
an interval API.. ). Is it okay to use `sql("SELECT
array(named_struct('name','bob')) as people")` instead if it works fine?
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