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Golang SelectQuery.IsExplainQuery方法代码示例

本文整理汇总了Golang中github.com/influxdb/influxdb/parser.SelectQuery.IsExplainQuery方法的典型用法代码示例。如果您正苦于以下问题:Golang SelectQuery.IsExplainQuery方法的具体用法?Golang SelectQuery.IsExplainQuery怎么用?Golang SelectQuery.IsExplainQuery使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在github.com/influxdb/influxdb/parser.SelectQuery的用法示例。


在下文中一共展示了SelectQuery.IsExplainQuery方法的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Golang代码示例。

示例1: NewQueryEngine

func NewQueryEngine(query *parser.SelectQuery, responseChan chan *protocol.Response) (*QueryEngine, error) {
	limit := query.Limit

	queryEngine := &QueryEngine{
		query:          query,
		where:          query.GetWhereCondition(),
		limiter:        NewLimiter(limit),
		responseChan:   responseChan,
		seriesToPoints: make(map[string]*protocol.Series),
		// stats stuff
		explain:       query.IsExplainQuery(),
		runStartTime:  0,
		runEndTime:    0,
		pointsRead:    0,
		pointsWritten: 0,
		shardId:       0,
		shardLocal:    false, //that really doesn't matter if it is not EXPLAIN query
		duration:      nil,
		seriesStates:  make(map[string]*SeriesState),
	}

	if queryEngine.explain {
		queryEngine.runStartTime = float64(time.Now().UnixNano()) / float64(time.Millisecond)
	}

	yield := func(series *protocol.Series) error {
		var response *protocol.Response

		queryEngine.limiter.calculateLimitAndSlicePoints(series)
		if len(series.Points) == 0 {
			return nil
		}
		if queryEngine.explain {
			//TODO: We may not have to send points, just count them
			queryEngine.pointsWritten += int64(len(series.Points))
		}
		response = &protocol.Response{Type: &queryResponse, Series: series}
		responseChan <- response
		return nil
	}

	var err error
	if query.HasAggregates() {
		err = queryEngine.executeCountQueryWithGroupBy(query, yield)
	} else if containsArithmeticOperators(query) {
		err = queryEngine.executeArithmeticQuery(query, yield)
	} else {
		err = queryEngine.distributeQuery(query, yield)
	}

	if err != nil {
		return nil, err
	}
	return queryEngine, nil
}
开发者ID:neurodrone,项目名称:influxdb,代码行数:55,代码来源:engine.go


注:本文中的github.com/influxdb/influxdb/parser.SelectQuery.IsExplainQuery方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。