在DynamoDB中，给定一个表，我能否通过编程找到主键(散列键和排序键)

const AWS = require('aws-sdk');
const dynamodb = new AWS.DynamoDB();

const tableName = 'your-table-name';

const params = {
  TableName: tableName
};

dynamodb.describeTable(params, function(err, data) {
  if (err) {
    console.error(err);
  } else {
    const tableDescription = data.Table;
    const hashKey = tableDescription.KeySchema.find(key => key.KeyType === 'HASH');
    const rangeKey = tableDescription.KeySchema.find(key => key.KeyType === 'RANGE');

    console.log('Hash Key:', hashKey.AttributeName);
    if (rangeKey) {
      console.log('Range Key:', rangeKey.AttributeName);
    }
  }
});