paleolimbot commented on code in PR #13397:
URL: https://github.com/apache/arrow/pull/13397#discussion_r915967027
##########
r/R/query-engine.R:
##########
@@ -190,7 +190,7 @@ ExecPlan <- R6Class("ExecPlan",
}
node
},
- Run = function(node) {
+ Run = function(node, as_table = FALSE) {
Review Comment:
With the improvements to `SafeCallIntoR()` the failure mode a *little*
better (at least mentions user-defined function).
``` r
library(arrow, warn.conflicts = FALSE)
#> Some features are not enabled in this build of Arrow. Run `arrow_info()`
for more information.
library(dplyr, warn.conflicts = FALSE)
fun <- arrow_scalar_function(
function(x) x + 1,
int32(), int64()
)
register_user_defined_function(fun, "plus_one")
record_batch(a = 2L) |>
mutate(b = plus_one(a)) |>
to_duckdb() |>
collect()
#> Error in duckdb_execute(res): duckdb_execute_R: Failed to run query
#> Error: Invalid Input Error: arrow_scan: get_next failed():
NotImplemented: Call to R (resolve scalar user-defined function output data
type) from a non-R thread from an unsupported context
#>
/Users/deweydunnington/Desktop/rscratch/arrow/cpp/src/arrow/compute/kernel.cc:391
resolver_(ctx, args)
#>
/Users/deweydunnington/Desktop/rscratch/arrow/cpp/src/arrow/compute/exec.cc:696
kernel_->signature->out_type().Resolve(kernel_ctx_, args.inputs)
#>
/Users/deweydunnington/Desktop/rscratch/arrow/cpp/src/arrow/compute/exec/expression.cc:602
executor->Init(&kernel_context, {kernel, descrs, options})
#>
/Users/deweydunnington/Desktop/rscratch/arrow/cpp/src/arrow/compute/exec/project_node.cc:92
ExecuteScalarExpression(simplified_expr, target, plan()->exec_context())
#>
/Users/deweydunnington/Desktop/rscratch/arrow/cpp/src/arrow/dataset/scanner.cc:79
delegate_.Next()
#>
/Users/deweydunnington/Desktop/rscratch/arrow/cpp/src/arrow/c/bridge.cc:1651
reader()->ReadNext(&batch)
```
I could attempt something more automatic in this PR (like `read_table()` or
`write_dataset()`) when this error occurs in `to_duckdb()`?
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