如何通过在google spanner中为节点js传递注释来插入空值

const { Spanner } = require('@google-cloud/spanner');

const spanner = new Spanner({
  projectId: 'your-project-id',
});
const instance = spanner.instance('your-instance-id');

const database = instance.database('your-database-id');

const data = [
  {
    id: 1,
    name: 'John',
    comment: null, // 这里传递注释来插入空值
  },
  // 其他数据行...
];

const transaction = database.transaction();
await transaction.run(async (err) => {
  if (err) {
    // 错误处理
    return;
  }

  const table = database.table('your-table-name');
  await table.insert(data);
});