Weston Pace created ARROW-17736:
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Summary: [C++] Add fallback for shorthand Substrait URIs without
scheme
Key: ARROW-17736
URL: https://issues.apache.org/jira/browse/ARROW-17736
Project: Apache Arrow
Issue Type: New Feature
Components: C++
Reporter: Weston Pace
At the moment there is no agreed URI base for the standard Substrait functions.
The Substrait consumer is currently expecting
{{https://github.com/substrait-io/substrait/blob/main/extensions/FILENAME.YAML}}
but Isthmus is currently generating {{/FILENAME.YAML}}.
Although this is a short-term problem I could imagine it popping up again from
time to time when users are developing their own functions. So, as a
workaround, I suggest that any URI equal to the empty string or "/" should be
treated as a "shortcut" and we fall back to name-only matching.
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