Method getCreateQueryFromStorage

src/Databases/DatabaseOnDisk.cpp:850–882

}

ASTPtr DatabaseOnDisk::getCreateQueryFromStorage(const String & table_name, const StoragePtr & storage, bool throw_on_error) const
{
    auto metadata_ptr = storage->getInMemoryMetadataPtr(getContext(), false);
    if (metadata_ptr == nullptr)
    {
        if (throw_on_error)
            throw Exception(ErrorCodes::CANNOT_GET_CREATE_TABLE_QUERY, "Cannot get metadata of {}.{}",
                            backQuote(getDatabaseName()), backQuote(table_name));
        return nullptr;
    }

    /// setup create table query storage info.
    auto ast_engine = make_intrusive<ASTFunction>();
    ast_engine->name = storage->getName();
    ast_engine->setNoEmptyArgs(true);
    auto ast_storage = make_intrusive<ASTStorage>();
    ast_storage->set(ast_storage->engine, ast_engine);

    const Settings & settings = getContext()->getSettingsRef();
    auto create_table_query = DB::getCreateQueryFromStorage(
        storage,
        ast_storage,
        false,
        static_cast<unsigned>(settings[Setting::max_parser_depth]),
        static_cast<unsigned>(settings[Setting::max_parser_backtracks]),
        throw_on_error,
        getContext());

    create_table_query->set(create_table_query->as<ASTCreateQuery>()->comment,
                            make_intrusive<ASTLiteral>(metadata_ptr->comment));

    return create_table_query;
}

void DatabaseOnDisk::modifySettingsMetadata(const SettingsChanges & settings_changes, ContextPtr)
{