rdblue commented on issue #279: Transforming timestamp to date should produce date URL: https://github.com/apache/incubator-iceberg/issues/279#issuecomment-521322801 Sorry for the confusion. I'm talking about the Iceberg date type, `Types.DateType.get()`. The transform implementation is still going to return a Java `Integer` because that's how dates are represented in Iceberg metadata: the number of days from the Unix epoch. This change would primarily just update `getResultType` and return `DateType.get()` when the granularity is `ChronoUnit.DAYS`. That will cause the partition tuple's field type to be a date, which should also cause the metadata table to display formatted dates instead of the day ordinal in Spark.
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