```sql
CREATE TABLE t
(
   id Int64, 
   d String,
   p Map(String, String)
   
)
ENGINE = ReplacingMergeTree order by id settings index_granularity  = 0;


insert into t values (1,  's', {'a':'b'});

CH starts eating RAM until it crashes

the same with

insert into t select 1,  's', map('a','b');

```

const StoragePtr & source_table, const StorageMetadataPtr & src_snapshot, const StorageMetadataPtr & my_snapshot) const
{
    return checkStructureAndGetMergeTreeData(*source_table, src_snapshot, my_snapshot);
}
std::pair<MergeTreeData::MutableDataPartPtr, scope_guard> MergeTreeData::cloneAndLoadDataPartOnSameDisk(
    const MergeTreeData::DataPartPtr & src_part,
    const String & tmp_part_prefix,
    const MergeTreePartInfo & dst_part_info,
    const StorageMetadataPtr & metadata_snapshot,
    const MergeTreeTransactionPtr & txn,
    HardlinkedFiles * hardlinked_files,
    bool copy_instead_of_hardlink,
    const NameSet & files_to_copy_instead_of_hardlinks)
{
    
    bool does_storage_policy_allow_same_disk = false;
    for (const DiskPtr & disk : getStoragePolicy()->getDisks())
    {
        if (disk->getName() == src_part->getDataPartStorage().getDiskName())
        {
            does_storage_policy_allow_same_disk = true;
            break;
        }
    }
    if (!does_storage_policy_allow_same_disk)
        throw Exception(
            ErrorCodes::BAD_ARGUMENTS,
            "Could not clone and load part {} because disk does not belong to storage policy",