// Count the number of points.
func (n *chainnode) Count(field string) *InfluxQLNode {
i := newInfluxQLNode("count", field, n.Provides(), StreamEdge, ReduceCreater{
CreateFloatIntegerReducer: func() (influxql.FloatPointAggregator, influxql.IntegerPointEmitter) {
fn := influxql.NewFloatFuncIntegerReducer(influxql.FloatCountReduce)
return fn, fn
},
CreateIntegerReducer: func() (influxql.IntegerPointAggregator, influxql.IntegerPointEmitter) {
fn := influxql.NewIntegerFuncReducer(influxql.IntegerCountReduce)
return fn, fn
},
})
n.linkChild(i)
return i
}
// Count the number of points.
func (n *chainnode) Count(field string) *InfluxQLNode {
i := newInfluxQLNode("count", field, n.Provides(), StreamEdge, ReduceCreater{
CreateFloatIntegerReducer: func() (influxql.FloatPointAggregator, influxql.IntegerPointEmitter) {
fn := influxql.NewFloatFuncIntegerReducer(influxql.FloatCountReduce, &influxql.IntegerPoint{Value: 0})
return fn, fn
},
CreateIntegerReducer: func() (influxql.IntegerPointAggregator, influxql.IntegerPointEmitter) {
fn := influxql.NewIntegerFuncReducer(influxql.IntegerCountReduce, &influxql.IntegerPoint{Value: 0})
return fn, fn
},
CreateStringIntegerReducer: func() (influxql.StringPointAggregator, influxql.IntegerPointEmitter) {
fn := influxql.NewStringFuncIntegerReducer(influxql.StringCountReduce, &influxql.IntegerPoint{Value: 0})
return fn, fn
},
CreateBooleanIntegerReducer: func() (influxql.BooleanPointAggregator, influxql.IntegerPointEmitter) {
fn := influxql.NewBooleanFuncIntegerReducer(influxql.BooleanCountReduce, &influxql.IntegerPoint{Value: 0})
return fn, fn
},
IsEmptyOK: true,
})
n.linkChild(i)
return i
}