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
```
table->is_dropped = true;
    create_queries.erase(table_name);
    UUID table_uuid = table->getStorageID().uuid;
    if (table_uuid != UUIDHelpers::Nil)
        DatabaseCatalog::instance().removeUUIDMappingFinally(table_uuid);
}
ASTPtr DatabaseMemory::getCreateDatabaseQuery() const
{
    auto create_query = std::make_shared<ASTCreateQuery>();
    create_query->setDatabase(getDatabaseName());
    create_query->set(create_query->storage, std::make_shared<ASTStorage>());
    create_query->storage->set(create_query->storage->engine, makeASTFunction(getEngineName()));
    if (const auto comment_value = getDatabaseComment(); !comment_value.empty())
        create_query->set(create_query->comment, std::make_shared<ASTLiteral>(comment_value));
    return create_query;
}
ASTPtr DatabaseMemory::getCreateTableQueryImpl(const String & table_name, ContextPtr, bool throw_on_error) const
{
    std::lock_guard lock{mutex};
    auto it = create_queries.find(table_name);
    if (it == create_queries.end() || !it->second)
    {
        if (throw_on_error)
            throw Exception(ErrorCodes::UNKNOWN_TABLE, "There is no metadata of table {} in database {}", table_name, database_name);
        else
            return {};
    }
    return it->second->clone();
}
UUID DatabaseMemory::tryGetTableUUID(const String & table_name) const