Weston Pace created ARROW-15621:
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Summary: [C++] Add extension types to the YAML for different
timestamp resolutions
Key: ARROW-15621
URL: https://issues.apache.org/jira/browse/ARROW-15621
Project: Apache Arrow
Issue Type: Improvement
Components: C++
Reporter: Weston Pace
Substrait has decided that microsecond resolution timestamps are sufficient.
Arrow has timestamps at a variety of resolutions.
If a user is fine casting to microsecond resolution then they don't actually
need to do anything. However, if a user really wanted the source resolution
(or maybe the semantics are slightly different around rounding) then we need to
create extension types for these in the YAML.
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