Ian Cook created ARROW-14528:
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Summary: [R] Add option to attempt 32-bit integer type inference
in CSV reader
Key: ARROW-14528
URL: https://issues.apache.org/jira/browse/ARROW-14528
Project: Apache Arrow
Issue Type: Improvement
Components: R
Reporter: Ian Cook
Fix For: 7.0.0
Expose ARROW-13028 to the R bindings so that users can choose to have
{{read_csv_arrow(as_data_frame = FALSE)}} and {{open_dataset(format = "csv)}}
infer 32-bit integer fields instead of always inferring 64-bit integer fields
for all integers (the current behavior).
Note that there is an existing option in the R bindings that controls something
similar: {{arrow.int64_downcast}}. See ARROW-10093 for details. I think we can
_not_ reuse this option to control the CSV reader, behavior because (a) users
might want to control these behaviors separately, and (b) the default value of
{{arrow.int64_downcast}} is {{TRUE}} which does not align with the existing
behavior of the CSV reader (always inferring 64-bit integer fields, i.e. _not_
downcasting) and we probably want to retain that as the default behavior. So we
will want to add a new argument or a new option to control this.
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