**How to reproduce**
Clickhouse server 20.13.1.5273
```
CREATE TABLE default.test
(
`key` UInt32,
`ts` DateTime CODEC(DoubleDelta, LZ4),
`db_time` DateTime DEFAULT now() COMMENT 'spout-ignore' CODEC(DoubleDelta, LZ4)
)
ENGINE = MergeTree
PARTITION BY toStartOfTenMinutes(db_time)
ORDER BY (key, ts)
TTL db_time + toIntervalHour(3)
SETTINGS index_granularity = 8192, merge_with_ttl_timeout = 3600, min_rows_for_compact_part = 1000000, min_bytes_for_compact_part = 200000000, in_memory_parts_enable_wal = 0;


INSERT INTO test(key, ts) SELECT number % 1000, now() + intDiv(number,1000) FROM numbers(500);

SELECT * FROM test;
500 rows in set. Elapsed: 0.003 sec.

DETACH TABLE test;

ATTACH TABLE test;

SELECT * FROM test;

0 rows in set. Elapsed: 0.002 sec.
```

**Expected behavior**
Clickhouse would flush parts on disk.
bool attach,
                  BrokenPartCallback broken_part_callback_ = [](const String &){});
    
    
    
    
    
    
    
    
    
    
    Block getMinMaxCountProjectionBlock(
        const StorageMetadataPtr & metadata_snapshot,
        const Names & required_columns,
        const SelectQueryInfo & query_info,
        const DataPartsVector & parts,
        DataPartsVector & normal_parts,
        ContextPtr query_context) const;
    std::optional<ProjectionCandidate> getQueryProcessingStageWithAggregateProjection(
        ContextPtr query_context, const StorageMetadataPtr & metadata_snapshot, SelectQueryInfo & query_info) const;
    QueryProcessingStage::Enum getQueryProcessingStage(
        ContextPtr query_context,
        QueryProcessingStage::Enum to_stage,
        const StorageMetadataPtr & metadata_snapshot,
        SelectQueryInfo & info) const override;
    ReservationPtr reserveSpace(UInt64 expected_size, VolumePtr & volume) const;
    static bool partsContainSameProjections(const DataPartPtr & left, const DataPartPtr & right);
    StoragePolicyPtr getStoragePolicy() const override;
    bool supportsPrewhere() const override { return true; }