wjones127 commented on code in PR #12751:
URL: https://github.com/apache/arrow/pull/12751#discussion_r853214952
##########
r/R/table.R:
##########
@@ -149,6 +149,77 @@ 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(...) {
Review Comment:
I agree with (2). If I understand right, that would mean that `cbind` would
play nicely with types that convert into extension arrays, which would be great.
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
