Statistics
https://play.clickhouse.com/play?user=play#c2VsZWN0IAp0b1N0YXJ0T2ZIb3VyKGNoZWNrX3N0YXJ0X3RpbWUpIGFzIGQsCmNvdW50KCksICBncm91cFVuaXFBcnJheShwdWxsX3JlcXVlc3RfbnVtYmVyKSwgIGFueShyZXBvcnRfdXJsKQpmcm9tIGNoZWNrcyB3aGVyZSAnMjAyMi0wNi0wMScgPD0gY2hlY2tfc3RhcnRfdGltZSBhbmQgdGVzdF9uYW1lIGxpa2UgJyUwMjQ5MV9wYXJ0X2xvZ19oYXNfdGFibGVfdXVpZCUnIGFuZCB0ZXN0X3N0YXR1cyBpbiAoJ0ZBSUwnLCAnRkxBS1knKSBncm91cCBieSBkIG9yZGVyIGJ5IGQgZGVzYw==

Some times there are not output from requests.
return {
        {"query_id", std::make_shared<DataTypeString>()},
        {"event_type", std::move(event_type_datatype)},
        {"merge_reason", std::move(merge_reason_datatype)},
        {"merge_algorithm", std::move(merge_algorithm_datatype)},
        {"event_date", std::make_shared<DataTypeDate>()},
        {"event_time", std::make_shared<DataTypeDateTime>()},
        {"event_time_microseconds", std::make_shared<DataTypeDateTime64>(6)},
        {"duration_ms", std::make_shared<DataTypeUInt64>()},
        {"database", std::make_shared<DataTypeString>()},
        {"table", std::make_shared<DataTypeString>()},
        {"part_name", std::make_shared<DataTypeString>()},
        {"partition_id", std::make_shared<DataTypeString>()},
        {"part_type", std::make_shared<DataTypeString>()},
        {"disk_name", std::make_shared<DataTypeString>()},
        {"path_on_disk", std::make_shared<DataTypeString>()},
        {"rows", std::make_shared<DataTypeUInt64>()},
        {"size_in_bytes", std::make_shared<DataTypeUInt64>()}, 
        
        {"merged_from", std::make_shared<DataTypeArray>(std::make_shared<DataTypeString>())},
        {"bytes_uncompressed", std::make_shared<DataTypeUInt64>()}, 
        {"read_rows", std::make_shared<DataTypeUInt64>()},
        {"read_bytes", std::make_shared<DataTypeUInt64>()},
        {"peak_memory_usage", std::make_shared<DataTypeUInt64>()},
        
        {"error", std::make_shared<DataTypeUInt16>()},
        {"exception", std::make_shared<DataTypeString>()},
    };
}
void PartLogElement::appendToBlock(MutableColumns & columns) const