RussellSpitzer commented on pull request #2061:
URL: https://github.com/apache/iceberg/pull/2061#issuecomment-815273258
@jun-he I believe this code also disables using multiple partition fields
derived from a particular field even if they are not identity transforms which
is allowed. For example
```SQL
CREATE TABLE qa_catalog.db.test_table(
part bignit COMMENT 'part',
refreshed_at timestamp,
date date
)
USING iceberg
PARTITIONED BY (entity, years(date), month(date), day(date), part)
```
```
java.lang.IllegalArgumentException: Cannot add redundant partition: 1001:
date_year: year(2) conflicts with 1002: date_month: month(2)
```
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