nealrichardson commented on code in PR #14361:
URL: https://github.com/apache/arrow/pull/14361#discussion_r993442605
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r/R/dplyr-funcs.R:
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@@ -160,6 +160,17 @@ create_binding_cache <- function() {
register_bindings_type()
register_bindings_augmented()
+ # HACK because random() doesn't work (ARROW-17974)
+ register_scalar_function(
+ "_random_along",
+ function(context, x) {
+ Array$create(runif(length(x)))
+ },
Review Comment:
I tried this, and it fails with the same error message as the C++ `random()`
function: `Error in `collect(.)`: Invalid: ExecuteScalarExpression cannot
Execute non-scalar expression (Array[double] < 0.2)`
That suggests that the problem with `random()` isn't random per se but the
other issues that Weston flagged.
(FTR, the parameter is `context$batch_length`)
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