Nothing
test_that("one-level lists can be read", {
con <- dbConnect(duckdb())
on.exit(dbDisconnect(con, shutdown = TRUE))
res <- dbGetQuery(con, "SELECT [] a")$a
expect_equal(res, list(integer(0)))
res <- dbGetQuery(con, "SELECT [42] a")$a
expect_equal(res, list(42))
res <- dbGetQuery(con, "SELECT [NULL] a")$a
expect_true(is.na(res[[1]]))
res <- dbGetQuery(con, "SELECT [42] a UNION ALL SELECT NULL")$a
expect_true(is.null(res[[2]]))
res <- dbGetQuery(con, "SELECT [42, 43] a")$a
expect_equal(res, list(c(42, 43)))
res <- dbGetQuery(con, "SELECT [42] a union all select [43]")$a
expect_equal(res, list(42, 43))
res <- dbGetQuery(con, "SELECT [42, 43, 44] a union all select [45, 46]")$a
expect_equal(res, list(c(42, 43, 44), c(45, 46)))
res <- dbGetQuery(con, "SELECT ['Hello', 'World'] a union all select ['There']")$a
expect_equal(res, list(c("Hello", "World"), c("There")))
})
Any scripts or data that you put into this service are public.
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.