**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

String no_parts_to_move_message;
        if (moving_part)
            no_parts_to_move_message = "Part '" + partition_id + "' is already on disk '" + disk->getName() + "'";
        else
            no_parts_to_move_message = "All parts of partition '" + partition_id + "' are already on disk '" + disk->getName() + "'";
        throw Exception(no_parts_to_move_message, ErrorCodes::UNKNOWN_DISK);
    }
    if (!movePartsToSpace(parts, std::static_pointer_cast<Space>(disk)))
        throw Exception("Cannot move parts because moves are manually disabled", ErrorCodes::ABORTED);
}
void MergeTreeData::movePartitionToVolume(const ASTPtr & partition, const String & name, bool moving_part, const Context & context)
{
    String partition_id;
    if (moving_part)
        partition_id = partition->as<ASTLiteral &>().value.safeGet<String>();
    else
        partition_id = getPartitionIDFromQuery(partition, context);
    DataPartsVector parts;
    if (moving_part)
    {
        auto part_info = MergeTreePartInfo::fromPartName(partition_id, format_version);
        parts.emplace_back(getActiveContainingPart(part_info));
        if (!parts.back() || parts.back()->name != part_info.getPartName())
            throw Exception("Part " + partition_id + " is not exists or not active", ErrorCodes::NO_SUCH_DATA_PART);
    }
    else
        parts = getDataPartsVectorInPartition(MergeTreeDataPartState::Committed, partition_id);
    auto volume = getStoragePolicy()->getVolumeByName(name);
    if (!volume)
        throw Exception("Volume " + name + " does not exists on policy " + getStoragePolicy()->getName(), ErrorCodes::UNKNOWN_DISK);