21.11.3.6
```
cat /etc/clickhouse-server/node.tsv
1,test

cat /etc/clickhouse-server/node_dictionary.xml
<dictionaries>
    <dictionary>
        <name>node</name>
        <source>
            <file>
                <path>/etc/clickhouse-server/node.tsv</path>
                <format>CSV</format>
            </file>
        </source>
        <lifetime>0</lifetime>
        <layout><flat /></layout>
        <structure>
            <id><name>key</name></id>
            <attribute>
                <name>name</name>
                <type>String</type>
                <null_value></null_value>
            </attribute>
        </structure>
    </dictionary>
</dictionaries>

create table default.node ( key UInt64, name String ) Engine=Dictionary(node);

select * from default.node;
┌─key─┬─name─┐
│   1 │ test │
└─────┴──────┘

/etc/init.d/clickhouse-server restart

<Error> Application: DB::Exception: Cannot attach 1 tables due to cyclic dependencies. See server log for details.
<Information> Application: shutting down
```
create.uuid = UUIDHelpers::generateV4();
        metadata_path = metadata_path / "store" / DatabaseCatalog::getPathForUUID(create.uuid);
        if (!create.attach && fs::exists(metadata_path))
            throw Exception(ErrorCodes::DATABASE_ALREADY_EXISTS, "Metadata directory {} already exists", metadata_path.string());
    }
    else if (create.storage->engine->name == "MaterializeMySQL"
        || create.storage->engine->name == "MaterializedMySQL")
    {
        
        
        
        
        bool attach_from_user = create.attach && !internal && !create.attach_short_syntax;
        bool create_from_user = !create.attach;
        if (create_from_user)
        {
            const auto & default_engine = getContext()->getSettingsRef().default_database_engine.value;
            if (create.uuid == UUIDHelpers::Nil && default_engine == DefaultDatabaseEngine::Atomic)
                create.uuid = UUIDHelpers::generateV4();    
        }
        else if (attach_from_user && create.uuid == UUIDHelpers::Nil)
        {
            
            
            throw Exception("Use short attach syntax ('ATTACH DATABASE name;' without engine) to attach existing database "
                            "or specify UUID to attach new database with Atomic engine", ErrorCodes::INCORRECT_QUERY);
        }
        
        if (create.uuid == UUIDHelpers::Nil)
            metadata_path = metadata_path / "metadata" / database_name_escaped;