krlmlr commented on code in PR #14371:
URL: https://github.com/apache/arrow/pull/14371#discussion_r994041070
##########
r/R/util.R:
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@@ -251,3 +251,25 @@ augment_io_error_msg <- function(e, call, schema = NULL,
format = NULL) {
handle_augmented_field_misuse(msg, call)
abort(msg, call = call)
}
+
+simulate_data_frame <- function(schema) {
+
Review Comment:
In DBI, we need to infer the SQL data types from a RecordBatchReader, even
if the DBI backend is not aware of Arrow (yet).
I wonder if there should be a way to convert a schema to a zero-row Arrow
table. One way to do this is via schema -> zero-row table -> data frame. For
DBI, schema -> data frame is sufficient, but perhaps schema -> zero-row table
is easier to implemented in C++, and the table -> data frame operation is
already efficient enough for zero-row tables.
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