假定具有以下数据记录的数据库：
{
"Parameters": {
"AccessControlAllowOrigin": {
"Type": "String",
"Default": "*"
}
},
"Resources": {
"ConfigApi": {
"Type": "AWS::ApiGateway::RestApi",
"Properties": {
"Body": {
"swagger": "2.0",
"tags": [
{
"name": "users",
"description": "secure user calls"
}
],
"schemes": [
"https"
],
"paths": {
"/user/{uid}/cart": {
"parameters": [
{
"name": "uid",
"in": "path",
"description": "user id",
"required": true,
"type": "string",
"format": "uuid"
}
],
"put": {
"tags": [
"users",
"cart"
],
"summary": "When called, this endpoint completes the user cart and puts their cart into their library",
"operationId": "completeusercart",
"description": "Completes the user cart\n",
"produces": [
"application/json"
],
"responses": {
"200": {
"description": "the user identifier",
"headers": {
"Access-Control-Allow-Origin": {
"type": "string"
},
"Access-Control-Allow-Headers": {
"type": "string"
}
},
"schema": {
"type": "string"
}
}
},
"x-amazon-apigateway-integration": {
"uri": "http://${stageVariables.httpHost}/user/{uid}/cart",
"contentHandling": "CONVERT_TO_TEXT",
"timeoutInMillis": 29000,
"connectionType": "INTERNET",
"httpMethod": "PUT",
"passthroughBehavior": "WHEN_NO_MATCH",
"type": "HTTP_PROXY",
"requestParameters": {
"integration.request.path.uid" : "method.request.path.uid"
},
"responses": {
"default": {
"responseModels": {
"application/json": "Empty"
},
"responseParameters": {
"method.response.header.Access-Control-Allow-Origin": {
"Fn::Sub": "'${AccessControlAllowOrigin}'"
},
"method.response.header.Access-Control-Allow-Headers": "'Content-Type,X-Amz-Date,Authorization,X-Api-Key,X-Amz-Security-Token'"
},
"statusCode": "200"
}
}
}
},
"options": {
"consumes": [
"application/json"
],
"produces": [
"application/json"
],
"responses": {
"200": {
"description": "200 response",
"schema": {
"$ref": "#/definitions/Empty"
},
"headers": {
"Access-Control-Allow-Origin": {
"type": "string"
},
"Access-Control-Allow-Methods": {
"type": "string"
},
"Access-Control-Allow-Headers": {
"type": "string"
}
}
}
},
"x-amazon-apigateway-integration": {
"httpMethod": "OPTIONS",
"passthroughBehavior": "WHEN_NO_MATCH",
"requestTemplates": {
"application/json": "{\"statusCode\": 200}"
},
"type": "MOCK",
"timeoutInMillis": 29000,
"responses": {
"2\\d{2}": {
"responseParameters": {
"method.response.header.Access-Control-Allow-Origin": {
"Fn::Sub": "'${AccessControlAllowOrigin}'"
},
"method.response.header.Access-Control-Allow-Methods": "'PUT,OPTIONS'",
"method.response.header.Access-Control-Allow-Headers": "'Content-Type,X-Amz-Date,Authorization,X-Api-Key,X-Amz-Security-Token'"
},
"statusCode": "200"
},
"4\\d{2}": {
"statusCode": "403"
},
"5\\d{2}": {
"statusCode": "403"
}
}
}
}
}
},
"definitions": {
"Empty": {
"type": "object",
"title": "Empty Schema"
}
}
}
}
},
"ConfigApiStage": {
"Type": "AWS::ApiGateway::Stage",
"Properties": {
"DeploymentId": {
"Ref": "ApiDeployment"
},
"MethodSettings": [
{
"DataTraceEnabled": true,
"HttpMethod": "*",
"LoggingLevel": "INFO",
"ResourcePath": "/*"
}
],
"RestApiId": {
"Ref": "ConfigApi"
},
"Variables": {
"httpHost": "0.0.0.0"
},
"StageName": "LATEST"
}
},
"ApiDeployment": {
"Type": "AWS::ApiGateway::Deployment",
"Properties": {
"RestApiId": {
"Ref": "ConfigApi"
},
"StageName": "DummyStage"
}
}
}
}
有一个称为2018-04-12T00:00:00Z value=1000 [series=distance]
2018-04-12T00:00:00Z value=10 [series=signal_quality]
2018-04-12T00:01:00Z value=1100 [series=distance]
2018-04-12T00:01:00Z value=0 [series=signal_quality]
的字段。方括号表示标记（省略了其他标记）。如您所见，数据是在不同数据记录中捕获的，而不是在相同记录中使用多个字段。
基于上述结构，如何查询经过信号质量过滤的距离的时间序列？目标是仅在信号质量高于固定阈值（例如5）。
答案 0 :(得分：2)
“鉴于上述结构”，在普通的InfluxDB中无法做到这一点。
请记住-尽管查询语言看起来很熟悉，但Influx并不是关系数据库的一部分。
再次给出给定的结构-如前所述，您可以继续使用Kapacitor。
但是我强烈建议您重新考虑结构，如果可以的话，如果您能够控制度量标准的收集方式。
如果这不是一种选择，那就是这样：方法是：在Kapacitor中旋转一个简单的作业，该作业将根据时间点（check this out for how将两个点合并为一个，然后将其放入新的度量中。
数据点如下所示：
DistanceQualityTogether,tag1=if,tag2=you,tag2=need,tag4=em distance=1000,signal_quality=10 2018-04-12T00:00:00Z
其余的都忽略了这种测量。
但是同样，如果您可以配置指标以这种方式发送-最好这样做。