Exemplo n.º 1
0
// Select the bottom `num` points for `field` and sort by any extra tags or fields.
func (n *chainnode) Bottom(num int64, field string, fieldsAndTags ...string) *InfluxQLNode {
	tags := make([]int, len(fieldsAndTags))
	for i := range fieldsAndTags {
		tags[i] = i
	}
	i := newInfluxQLNode("bottom", field, n.Provides(), BatchEdge, ReduceCreater{
		CreateFloatBulkReducer: func() (FloatBulkPointAggregator, influxql.FloatPointEmitter) {
			fn := influxql.NewFloatSliceFuncReducer(influxql.NewFloatBottomReduceSliceFunc(
				int(num),
				tags,
				influxql.Interval{},
			))
			return fn, fn
		},
		CreateIntegerBulkReducer: func() (IntegerBulkPointAggregator, influxql.IntegerPointEmitter) {
			fn := influxql.NewIntegerSliceFuncReducer(influxql.NewIntegerBottomReduceSliceFunc(
				int(num),
				tags,
				influxql.Interval{},
			))
			return fn, fn
		},
		TopBottomCallInfo: &TopBottomCallInfo{
			FieldsAndTags: fieldsAndTags,
		},
	})
	n.linkChild(i)
	return i
}
Exemplo n.º 2
0
// Produce batch of only the distinct points.
func (n *chainnode) Distinct(field string) *InfluxQLNode {
	i := newInfluxQLNode("distinct", field, n.Provides(), BatchEdge, ReduceCreater{
		CreateFloatBulkReducer: func() (FloatBulkPointAggregator, influxql.FloatPointEmitter) {
			fn := influxql.NewFloatSliceFuncReducer(influxql.FloatDistinctReduceSlice)
			return fn, fn
		},
		CreateIntegerBulkReducer: func() (IntegerBulkPointAggregator, influxql.IntegerPointEmitter) {
			fn := influxql.NewIntegerSliceFuncReducer(influxql.IntegerDistinctReduceSlice)
			return fn, fn
		},
	})
	n.linkChild(i)
	return i
}
Exemplo n.º 3
0
// Select a point at the given percentile. This is a selector function, no interpolation between points is performed.
func (n *chainnode) Percentile(field string, percentile float64) *InfluxQLNode {
	i := newInfluxQLNode("percentile", field, n.Provides(), StreamEdge, ReduceCreater{
		CreateFloatBulkReducer: func() (FloatBulkPointAggregator, influxql.FloatPointEmitter) {
			fn := influxql.NewFloatSliceFuncReducer(influxql.NewFloatPercentileReduceSliceFunc(percentile))
			return fn, fn
		},
		CreateIntegerBulkReducer: func() (IntegerBulkPointAggregator, influxql.IntegerPointEmitter) {
			fn := influxql.NewIntegerSliceFuncReducer(influxql.NewIntegerPercentileReduceSliceFunc(percentile))
			return fn, fn
		},
	})
	n.linkChild(i)
	return i
}