以下是使用AWS Athena Javascript SDK从查询结果创建表(CTAS)并指定输出格式的代码示例:
// 引入AWS SDK和AthenaClient模块
const AWS = require('aws-sdk');
const { AthenaClient, StartQueryExecutionCommand, GetQueryExecutionCommand, GetQueryResultsCommand, CreateNamedQueryCommand, CreateDataCatalogCommand, CreateNamedQueryCommand } = require("@aws-sdk/client-athena");
// 设置AWS配置
AWS.config.update({ region: 'YOUR_REGION' });
// 创建Athena客户端对象
const client = new AthenaClient({ region: 'YOUR_REGION' });
// 定义查询语句
const query = "CREATE TABLE new_table WITH (format = 'Parquet') AS SELECT * FROM existing_table";
// 定义函数来执行查询并处理结果
async function executeQuery() {
// 启动查询执行
const executionParams = {
QueryString: query,
ResultConfiguration: {
OutputLocation: 's3://YOUR_BUCKET/athena-results/'
}
};
const executionCommand = new StartQueryExecutionCommand(executionParams);
const executionResponse = await client.send(executionCommand);
const queryExecutionId = executionResponse.QueryExecutionId;
// 等待查询执行完成
const waitTime = 5000; // 每5秒检查一次查询状态
const maxWaitTime = 60000; // 最大等待时间为60秒
let elapsedTime = 0;
while (elapsedTime < maxWaitTime) {
const getQueryExecutionCommand = new GetQueryExecutionCommand({ QueryExecutionId: queryExecutionId });
const getQueryExecutionResponse = await client.send(getQueryExecutionCommand);
const status = getQueryExecutionResponse.QueryExecution.Status.State;
if (status === 'SUCCEEDED') {
// 查询执行成功后,获取结果
const getQueryResultsCommand = new GetQueryResultsCommand({ QueryExecutionId: queryExecutionId });
const getQueryResultsResponse = await client.send(getQueryResultsCommand);
const results = getQueryResultsResponse.ResultSet.Rows;
// 将结果写入新表
// ...
break;
} else if (status === 'FAILED' || status === 'CANCELLED') {
console.error('Query execution failed or was cancelled');
break;
}
elapsedTime += waitTime;
await new Promise(resolve => setTimeout(resolve, waitTime));
}
}
// 执行查询
executeQuery().catch(error => console.error(error));
在上述代码中,您需要替换以下部分以适应您的环境:
YOUR_REGION:您的AWS区域,例如us-east-1。existing_table:您要从中创建新表的现有表的名称。new_table:您要创建的新表的名称。s3://YOUR_BUCKET/athena-results/:您要存储查询结果的S3存储桶和路径。请确保您具有适当的AWS凭据和权限来访问Athena服务和S3存储桶。
在代码中的注释部分,您可以添加适当的代码来将查询结果写入新表,具体取决于您使用的数据库或存储方案。