**Describe the bug**

I have a table like:

```
CREATE TABLE test (
    time DateTime64(3)
    ...
) ENGINE = MergeTree()
PARTITION BY toStartOfInterval(time, INTERVAL 1 HOUR)
...
```

But when I search in `system.parts` it does not appear to have the `min/max` columns appropriately set?

```
partition:                             2020-06-01 01:00:00
min_date:                              1970-01-01
max_date:                              1970-01-01
min_time:                              1970-01-01 00:00:00
max_time:                              1970-01-01 00:00:00
```

I assume that if these were correctly set, doing a `select toStartOfInterval(time, interval 1 day), count()` type query would be pretty instant rather than trying to scan everything? I am guessing this is due to the `DateTime64` type in use?

Clickhouse 20.11.3.3

write_part_log(ExecutionStatus::fromCurrentException());
            if (cloned_part)
                cloned_part->remove();
            throw;
        }
    }
    return true;
}
bool MergeTreeData::canUsePolymorphicParts(const MergeTreeSettings & settings, String * out_reason) const
{
    if (!canUseAdaptiveGranularity())
    {
        if (out_reason && (settings.min_rows_for_wide_part != 0 || settings.min_bytes_for_wide_part != 0
            || settings.min_rows_for_compact_part != 0 || settings.min_bytes_for_compact_part != 0))
        {
            *out_reason = fmt::format(
                    "Table can't create parts with adaptive granularity, but settings"
                    " min_rows_for_wide_part = {}"
                    ", min_bytes_for_wide_part = {}"
                    ", min_rows_for_compact_part = {}"
                    ", min_bytes_for_compact_part = {}"
                    ". Parts with non-adaptive granularity can be stored only in Wide (default) format.",
                    settings.min_rows_for_wide_part,    settings.min_bytes_for_wide_part,
                    settings.min_rows_for_compact_part, settings.min_bytes_for_compact_part);
        }
        return false;
    }
    return true;
}
MergeTreeData::AlterConversions MergeTreeData::getAlterConversionsForPart(const MergeTreeDataPartPtr part) const