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" : ...
}