Julien Le Dem created ARROW-887:
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Summary: [format] For backward compatibility, new unit fields must
have default values matching previous implied unit
Key: ARROW-887
URL: https://issues.apache.org/jira/browse/ARROW-887
Project: Apache Arrow
Issue Type: Bug
Components: Format
Reporter: Julien Le Dem
Assignee: Julien Le Dem
Flatbuffer "defaults the default value" to 0. Which means we interpret
previously serialized Flatbuf has having the first element of the enum. In
particular Date and Time unit fields end up being read as DateUnit.DAY and
TimeUnit.SECOND when the previous implied unit was MILLISECOND for both.
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