jonkeane commented on a change in pull request #10601:
URL: https://github.com/apache/arrow/pull/10601#discussion_r658849841
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File path: r/R/metadata.R
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@@ -56,7 +56,21 @@ apply_arrow_r_metadata <- function(x, r_metadata) {
if (is.data.frame(x)) {
if (length(names(x)) && !is.null(columns_metadata)) {
for (name in intersect(names(columns_metadata), names(x))) {
- x[[name]] <- apply_arrow_r_metadata(x[[name]],
columns_metadata[[name]])
+ x[[name]] <- tryCatch({
+ x[[name]] <- apply_arrow_r_metadata(x[[name]],
columns_metadata[[name]])
+ },
+ error = function(e) {
+ # if we are erroring because of incompatible data, try and make
this
+ # a tibble
+ # TODO: also check if this is a list?
+ # TODO: only if there are exactly as many sub-list elements as
rows?
+ # TODO: decide if this obviates the need for the option
+ # arrow.strucs_as_dfs (or if that is actually a better way to
handle that)
+ if (grepl("must be compatible with existing data", e$message))
+ x[[name]] <- as.data.frame(x[[name]])
+ class(x[[name]]) <- c("tbl_df", "tbl", "data.frame")
+ apply_arrow_r_metadata(x[[name]], columns_metadata[[name]])
+ })
Review comment:
This works along side the option restore-old-behavior I point out below.
I don't think this could totally replace it. Though if we don't go this route
maybe in the invalid message here we should mention trying to re-read with that
option set
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