paleolimbot commented on code in PR #12751:
URL: https://github.com/apache/arrow/pull/12751#discussion_r848715079
##########
r/R/table.R:
##########
@@ -149,6 +149,75 @@ Table$create <- function(..., schema = NULL) {
#' @export
names.Table <- function(x) x$ColumnNames()
+#' @export
+rbind.Table <- function(...) {
+ tables <- list(...)
+
+ # assert they have same schema
+ schema <- tables[[1]]$schema
+ unequal_schema_idx <- which.min(lapply(tables, function(x) x$schema ==
schema))
+ if (unequal_schema_idx != 1) {
+ abort(c(
+ sprintf("Schema at index %i does not match the first schema",
unequal_schema_idx),
+ i = paste0("Schema 1:\n", schema$ToString()),
+ i = paste0(sprintf("Schema %d:\n", unequal_schema_idx),
+ tables[[unequal_schema_idx]]$schema$ToString())
+ ))
+ }
+
+ # create chunked array for each column
+ columns <- map(seq_len(tables[[1]]$num_columns), function(i) {
+ do.call(c, map(tables, ~ .[[i]]))
+ })
+
+ Table$create(!!!set_names(columns, names(schema)), schema = schema)
+}
+
+#' @export
+cbind.Table <- function(..., call = caller_env()) {
Review Comment:
Just inside the function is what I had in mind.
Are you sure about `caller_env()` though? I really think that `sys.call()`
is what you're after.
``` r
some_fun <- function() {
user_call <- sys.call()
tryCatch(
stop("whoa!"),
error = function(e) {
rlang::abort("whoa revamped!", call = user_call, parent = e)
}
)
}
some_fun()
#> Error in `some_fun()`:
#> ! whoa revamped!
#> Caused by error in `doTryCatch()`:
#> ! whoa!
some_fun2 <- function() {
user_call <- rlang::caller_env()
tryCatch(
stop("whoa!"),
error = function(e) {
rlang::abort("whoa revamped!", call = user_call, parent = e)
}
)
}
some_fun2()
#> Error:
#> ! whoa revamped!
#> Caused by error in `doTryCatch()`:
#> ! whoa!
```
<sup>Created on 2022-04-12 by the [reprex
package](https://reprex.tidyverse.org) (v2.0.1)</sup>
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