```sql
drop table if exists src;

create table src( A Int64, B String, C String) Engine=MergeTree order by A
SETTINGS min_bytes_for_wide_part=0;
insert into src values(1, 'one', 'test');

alter table src detach partition tuple();

alter table src modify column B Nullable(String);

alter table src attach partition tuple();
select * from src;
┌─A─┬─B───┬─C────┐
│ 1 │ one │ test │
└───┴─────┴──────┘

alter table src update C = 'test1' where 1 settings mutations_sync=2;

select * from src;
┌─A─┬─B────┬─C─────┐
│ 1 │ ᴺᵁᴸᴸ │ test1 │   -- expected B='one'
└───┴──────┴───────┘
```

```sql
drop table if exists src;
create table src( A String, B String, C String) Engine=MergeTree order by A
SETTINGS min_bytes_for_wide_part=0;
insert into src values('one', 'one', 'test');

alter table src detach partition tuple();

alter table src modify column A LowCardinality(String);

alter table src attach partition tuple();

select * from src;
┌─A───┬─B───┬─C────┐
│ one │ one │ test │
└─────┴─────┴──────┘

alter table src update C = 'test1' where 1 settings mutations_sync=2;

select * from src;

Received exception from server (version 22.9.1):
Code: 49. DB::Exception: Received from localhost:9000. DB::Exception: 
Got empty stream for SerializationLowCardinality keys.: (while reading column A): 
(while reading from part /var/lib/clickhouse/store/11b/11b74812-48b9-4c1f-9bdc-3e7a28137a9e/all_3_3_0_4/ from mark 0 with max_rows_to_read = 1): 
While executing MergeTreeInOrder. (LOGICAL_ERROR)

```

```sql
drop table if exists src;
create table src( A String, B String, C String) Engine=MergeTree order by A
SETTINGS min_bytes_for_wide_part=0;
insert into src values('one', 'one', 'test');

alter table src detach partition tuple();

alter table src modify column A LowCardinality(String);

alter table src attach partition tuple();

select * from src;
┌─A───┬─B───┬─C────┐
│ one │ one │ test │
└─────┴─────┴──────┘

alter table src modify column C LowCardinality(String);

select * from src;

Received exception from server (version 22.9.3):
Code: 49. DB::Exception: Received from localhost:9000. 
DB::Exception: Got empty stream for SerializationLowCardinality keys.: 
```

related https://github.com/ClickHouse/ClickHouse/issues/42083 , https://github.com/ClickHouse/ClickHouse/issues/42074
(basically it's the same one issue, but I opened this one, because I think the root issue is in `alter update`.

it seems `alter update` updates columns.txt for all columns even if they are not participated in the `alter update`.
std::unique_ptr<MutationsInterpreter> interpreter;
    UInt64 watch_prev_elapsed{0};
    std::unique_ptr<MergeStageProgress> stage_progress{nullptr};
    MutationCommands commands_for_part;
    MutationCommands for_interpreter;
    MutationCommands for_file_renames;
    NamesAndTypesList storage_columns;
    NameSet materialized_indices;
    NameSet materialized_projections;
    MutationsInterpreter::MutationKind::MutationKindEnum mutation_kind
        = MutationsInterpreter::MutationKind::MutationKindEnum::MUTATE_UNKNOWN;
    MergeTreeData::MutableDataPartPtr new_data_part;
    DataPartStorageBuilderPtr data_part_storage_builder;
    IMergedBlockOutputStreamPtr out{nullptr};
    String mrk_extension;
    std::vector<ProjectionDescriptionRawPtr> projections_to_build;
    IMergeTreeDataPart::MinMaxIndexPtr minmax_idx{nullptr};
    NameSet updated_columns;
    std::set<MergeTreeIndexPtr> indices_to_recalc;
    std::set<ProjectionDescriptionRawPtr> projections_to_recalc;
    NameSet files_to_skip;
    NameToNameVector files_to_rename;
    bool need_sync;
    ExecuteTTLType execute_ttl_type{ExecuteTTLType::NONE};
    MergeTreeTransactionPtr txn;
    MergeTreeData::HardlinkedFiles hardlinked_files;
    scope_guard temporary_directory_lock;
};
using MutationContextPtr = std::shared_ptr<MutationContext>;
class MergeProjectionPartsTask : public IExecutableTask