如何使用AND & OR编写DynamoDB查询过滤器？

// 定义条件表达式属性名称的占位符
const params = {
  TableName: "your_table_name",
  FilterExpression: "#attr1 = :val1 AND #attr2 = :val2",
  ExpressionAttributeNames: {
    "#attr1": "attribute1",
    "#attr2": "attribute2"
  },
  ExpressionAttributeValues: {
    ":val1": "value1",
    ":val2": "value2"
  }
};

// 使用以上条件查询 DynamoDB
dynamodb.scan(params, (err, data) => {
  if (err) console.log(err);
  else console.log(data);
});

// 定义条件表达式属性名称的占位符
const params = {
  TableName: "your_table_name",
  FilterExpression: "#attr1 = :val1 OR #attr2 = :val2",
  ExpressionAttributeNames: {
    "#attr1": "attribute1",
    "#attr2": "attribute2"
  },
  ExpressionAttributeValues: {
    ":val1": "value1",
    ":val2": "value2"
  }
};

// 使用以上条件查询 DynamoDB
dynamodb.scan(params, (err, data) => {
  if (err) console.log(err);
  else console.log(data);
});