**Use case**

If FixedString is used with more than 256 bytes in size, it is suspicious and most likely indicates misusage.
Forbid this by default and add a setting to override it; ATTACH queries should allow creating tables nevertheless.

See also: `allow_suspicious_low_cardinality_types`.

if (create.storage && !create.storage->engine)
            throw Exception(ErrorCodes::INCORRECT_QUERY, "Invalid storage definition for temporary table: must be either ENGINE = Memory or empty");
        auto engine_ast = std::make_shared<ASTFunction>();
        engine_ast->name = "Memory";
        engine_ast->no_empty_args = true;
        auto storage_ast = std::make_shared<ASTStorage>();
        storage_ast->set(storage_ast->engine, engine_ast);
        create.set(create.storage, storage_ast);
        return;
    }
    if (create.storage)
    {
        
        if (!create.storage->engine)
            setDefaultTableEngine(*create.storage, getContext());
        return;
    }
    if (!create.as_table.empty())
    {
        
        String as_database_name = getContext()->resolveDatabase(create.as_database);
        String as_table_name = create.as_table;
        ASTPtr as_create_ptr = DatabaseCatalog::instance().getDatabase(as_database_name)->getCreateTableQuery(as_table_name, getContext());
        const auto & as_create = as_create_ptr->as<ASTCreateQuery &>();
        const String qualified_name = backQuoteIfNeed(as_database_name) + "." + backQuoteIfNeed(as_table_name);
        if (as_create.is_ordinary_view)