hetu-core/hetu-docs/zh/rest/query.md

查询资源

Query REST服务是rest服务中最复杂的。它包含节点的详细信息，以及其它在openLooKeng上执行的查询的状态和历史的详细信息。

• GET /v1/query

此服务返回有关当前在openLooKeng协调节点上执行的查询的信息和统计信息。

当你将浏览器指向一个openLooKeng坐标时，你会看到此服务输出的一个渲染的版本，将显示最近的在openLooKeng上执行的查询。

• GET /v1/query/{queryId}

可调用此服务收集详细的有关查询的统计数据。如果您加载openLooKeng协调节点的Web界面，您会看到一个关于当前查询的清单。单击查询将显示指向此服务的链接。

响应样例：

{
"queryId" : "20131229_211533_00017_dk5x2",
"session" : {
      "user" : "tobrien",
      "source" : "openlk-cli",
      "catalog" : "jmx",
      "schema" : "jmx",
      "remoteUserAddress" : ""192.168.1.1"",
      "userAgent" : "StatementClient/0.55-SNAPSHOT",
      "startTime" : 1388351852026
},
"state" : "FINISHED",
"self" : "http://127.0.0.1:8080/v1/query/20131229_211533_00017_dk5x2",
"fieldNames" : [ "name" ],
"query" : "select name from \"java.lang:type=runtime\"",
"queryStats" : {
      "createTime" : "2013-12-29T16:17:32.027-05:00",
      "executionStartTime" : "2013-12-29T16:17:32.086-05:00",
      "lastHeartbeat" : "2013-12-29T16:17:44.561-05:00",
      "endTime" : "2013-12-29T16:17:32.152-05:00",
      "elapsedTime" : "125.00ms",
      "queuedTime" : "1.31ms",
      "analysisTime" : "4.84ms",
      "distributedPlanningTime" : "353.00us",
      "totalTasks" : 2,
      "runningTasks" : 0,
      "completedTasks" : 2,
      "totalDrivers" : 2,
      "queuedDrivers" : 0,
      "runningDrivers" : 0,
      "completedDrivers" : 2,
      "totalMemoryReservation" : "0B",
      "totalScheduledTime" : "5.84ms",
      "totalCpuTime" : "710.49us",
      "totalBlockedTime" : "27.38ms",
      "rawInputDataSize" : "27B",
      "rawInputPositions" : 1,
      "processedInputDataSize" : "32B",
      "processedInputPositions" : 1,
      "outputDataSize" : "32B",
      "outputPositions" : 1
},
"outputStage" : ...
}