// Ensure that a integer iterator can be created for a min() call.
func TestCallIterator_Min_Integer(t *testing.T) {
itr, _ := influxql.NewCallIterator(
&IntegerIterator{Points: []influxql.IntegerPoint{
{Time: 0, Value: 15, Tags: ParseTags("region=us-east,host=hostA")},
{Time: 1, Value: 11, Tags: ParseTags("region=us-west,host=hostB")},
{Time: 2, Value: 10, Tags: ParseTags("region=us-east,host=hostA")},
{Time: 4, Value: 12, Tags: ParseTags("region=us-east,host=hostA")},
{Time: 1, Value: 10, Tags: ParseTags("region=us-west,host=hostA")},
{Time: 5, Value: 20, Tags: ParseTags("region=us-east,host=hostA")},
{Time: 23, Value: 8, Tags: ParseTags("region=us-west,host=hostB")},
}},
influxql.IteratorOptions{
Expr: MustParseExpr(`min("value")`),
Dimensions: []string{"host"},
Interval: influxql.Interval{Duration: 5 * time.Nanosecond},
},
)
if a := Iterators([]influxql.Iterator{itr}).ReadAll(); !deep.Equal(a, [][]influxql.Point{
{&influxql.IntegerPoint{Time: 1, Value: 10, Tags: ParseTags("host=hostA"), Aggregated: 4}},
{&influxql.IntegerPoint{Time: 1, Value: 11, Tags: ParseTags("host=hostB"), Aggregated: 1}},
{&influxql.IntegerPoint{Time: 5, Value: 20, Tags: ParseTags("host=hostA"), Aggregated: 1}},
{&influxql.IntegerPoint{Time: 23, Value: 8, Tags: ParseTags("host=hostB"), Aggregated: 1}},
}) {
t.Fatalf("unexpected points: %s", spew.Sdump(a))
}
}
// Ensure that a string iterator can be created for a count() call.
func TestCallIterator_Count_String(t *testing.T) {
itr, _ := influxql.NewCallIterator(
&StringIterator{Points: []influxql.StringPoint{
{Name: "cpu", Time: 0, Value: "d", Tags: ParseTags("region=us-east,host=hostA")},
{Name: "cpu", Time: 1, Value: "c", Tags: ParseTags("region=us-west,host=hostB")},
{Name: "cpu", Time: 2, Value: "b", Tags: ParseTags("region=us-east,host=hostA")},
{Name: "cpu", Time: 1, Value: "b", Tags: ParseTags("region=us-west,host=hostA")},
{Name: "cpu", Time: 5, Value: "e", Tags: ParseTags("region=us-east,host=hostA")},
{Name: "cpu", Time: 23, Value: "a", Tags: ParseTags("region=us-west,host=hostB")},
{Name: "mem", Time: 23, Value: "b", Tags: ParseTags("region=us-west,host=hostB")},
}},
influxql.IteratorOptions{
Expr: MustParseExpr(`count("value")`),
Dimensions: []string{"host"},
Interval: influxql.Interval{Duration: 5 * time.Nanosecond},
},
)
if a := Iterators([]influxql.Iterator{itr}).ReadAll(); !deep.Equal(a, [][]influxql.Point{
{&influxql.IntegerPoint{Name: "cpu", Time: 0, Value: 3, Tags: ParseTags("host=hostA"), Aggregated: 3}},
{&influxql.IntegerPoint{Name: "cpu", Time: 0, Value: 1, Tags: ParseTags("host=hostB"), Aggregated: 1}},
{&influxql.IntegerPoint{Name: "cpu", Time: 5, Value: 1, Tags: ParseTags("host=hostA"), Aggregated: 1}},
{&influxql.IntegerPoint{Name: "cpu", Time: 20, Value: 1, Tags: ParseTags("host=hostB"), Aggregated: 1}},
{&influxql.IntegerPoint{Name: "mem", Time: 20, Value: 1, Tags: ParseTags("host=hostB"), Aggregated: 1}},
}) {
t.Fatalf("unexpected points: %s", spew.Sdump(a))
}
}
// Ensure that a boolean iterator can be created for a last() call.
func TestCallIterator_Last_Boolean(t *testing.T) {
itr, _ := influxql.NewCallIterator(
&BooleanIterator{Points: []influxql.BooleanPoint{
{Time: 1, Value: true, Tags: ParseTags("region=us-west,host=hostB")},
{Time: 2, Value: false, Tags: ParseTags("region=us-east,host=hostA")},
{Time: 0, Value: true, Tags: ParseTags("region=us-east,host=hostA")},
{Time: 1, Value: false, Tags: ParseTags("region=us-west,host=hostA")},
{Time: 6, Value: false, Tags: ParseTags("region=us-east,host=hostA")},
{Time: 23, Value: false, Tags: ParseTags("region=us-west,host=hostB")},
}},
influxql.IteratorOptions{
Expr: MustParseExpr(`last("value")`),
Dimensions: []string{"host"},
Interval: influxql.Interval{Duration: 5 * time.Nanosecond},
},
)
if a := Iterators([]influxql.Iterator{itr}).ReadAll(); !deep.Equal(a, [][]influxql.Point{
{&influxql.BooleanPoint{Time: 2, Value: false, Tags: ParseTags("host=hostA"), Aggregated: 3}},
{&influxql.BooleanPoint{Time: 1, Value: true, Tags: ParseTags("host=hostB"), Aggregated: 1}},
{&influxql.BooleanPoint{Time: 6, Value: false, Tags: ParseTags("host=hostA"), Aggregated: 1}},
{&influxql.BooleanPoint{Time: 23, Value: false, Tags: ParseTags("host=hostB"), Aggregated: 1}},
}) {
t.Fatalf("unexpected points: %s", spew.Sdump(a))
}
}
// Ensure that a float iterator can be created for a last() call.
func TestCallIterator_Last_Float(t *testing.T) {
itr, _ := influxql.NewCallIterator(
&FloatIterator{Points: []influxql.FloatPoint{
{Time: 1, Value: 11, Tags: ParseTags("region=us-west,host=hostB")},
{Time: 2, Value: 10, Tags: ParseTags("region=us-east,host=hostA")},
{Time: 0, Value: 15, Tags: ParseTags("region=us-east,host=hostA")},
{Time: 1, Value: 10, Tags: ParseTags("region=us-west,host=hostA")},
{Time: 6, Value: 20, Tags: ParseTags("region=us-east,host=hostA")},
{Time: 23, Value: 8, Tags: ParseTags("region=us-west,host=hostB")},
}},
influxql.IteratorOptions{
Expr: MustParseExpr(`last("value")`),
Dimensions: []string{"host"},
Interval: influxql.Interval{Duration: 5 * time.Nanosecond},
},
)
if a, err := Iterators([]influxql.Iterator{itr}).ReadAll(); err != nil {
t.Fatalf("unexpected error: %s", err)
} else if !deep.Equal(a, [][]influxql.Point{
{&influxql.FloatPoint{Time: 2, Value: 10, Tags: ParseTags("host=hostA"), Aggregated: 3}},
{&influxql.FloatPoint{Time: 1, Value: 11, Tags: ParseTags("host=hostB"), Aggregated: 1}},
{&influxql.FloatPoint{Time: 6, Value: 20, Tags: ParseTags("host=hostA"), Aggregated: 1}},
{&influxql.FloatPoint{Time: 23, Value: 8, Tags: ParseTags("host=hostB"), Aggregated: 1}},
}) {
t.Fatalf("unexpected points: %s", spew.Sdump(a))
}
}
// Ensure that a float iterator can be created for a min() call.
func TestCallIterator_Min_Float(t *testing.T) {
itr := influxql.NewCallIterator(
&FloatIterator{Points: []influxql.FloatPoint{
{Time: 0, Value: 15, Tags: ParseTags("region=us-east,host=hostA")},
{Time: 1, Value: 11, Tags: ParseTags("region=us-west,host=hostB")},
{Time: 2, Value: 10, Tags: ParseTags("region=us-east,host=hostA")},
{Time: 4, Value: 12, Tags: ParseTags("region=us-east,host=hostA")},
{Time: 1, Value: 10, Tags: ParseTags("region=us-west,host=hostA")},
{Time: 5, Value: 20, Tags: ParseTags("region=us-east,host=hostA")},
{Time: 23, Value: 8, Tags: ParseTags("region=us-west,host=hostB")},
}},
influxql.IteratorOptions{
Expr: MustParseExpr(`min("value")`),
Dimensions: []string{"host"},
Interval: influxql.Interval{Duration: 5 * time.Nanosecond},
},
)
if a, ok := CompareFloatIterator(itr, []influxql.FloatPoint{
{Time: 0, Value: 10, Tags: ParseTags("host=hostA")},
{Time: 0, Value: 11, Tags: ParseTags("host=hostB")},
{Time: 5, Value: 20, Tags: ParseTags("host=hostA")},
{Time: 20, Value: 8, Tags: ParseTags("host=hostB")},
}); !ok {
t.Fatalf("unexpected points: %s", spew.Sdump(a))
}
}
func (e *Engine) CreateIterator(opt influxql.IteratorOptions) (influxql.Iterator, error) {
if call, ok := opt.Expr.(*influxql.Call); ok {
refOpt := opt
refOpt.Expr = call.Args[0].(*influxql.VarRef)
inputs, err := e.createVarRefIterator(refOpt)
if err != nil {
return nil, err
}
input := influxql.NewMergeIterator(inputs, opt)
if opt.InterruptCh != nil {
input = influxql.NewInterruptIterator(input, opt.InterruptCh)
}
return influxql.NewCallIterator(input, opt)
}
itrs, err := e.createVarRefIterator(opt)
if err != nil {
return nil, err
}
itr := influxql.NewSortedMergeIterator(itrs, opt)
if opt.InterruptCh != nil {
itr = influxql.NewInterruptIterator(itr, opt.InterruptCh)
}
return itr, nil
}
func BenchmarkCallIterator_Min_Float(b *testing.B) {
input := GenerateFloatIterator(rand.New(rand.NewSource(0)), b.N)
b.ResetTimer()
b.ReportAllocs()
itr, err := influxql.NewCallIterator(input, influxql.IteratorOptions{
Expr: MustParseExpr("min(value)"),
Interval: influxql.Interval{Duration: 1 * time.Hour},
InterruptCh: make(chan struct{}),
})
if err != nil {
b.Fatal(err)
}
switch itr := itr.(type) {
case influxql.FloatIterator:
for {
if p := itr.Next(); p == nil {
break
}
}
default:
b.Fatalf("incorrect iterator type: %T", itr)
}
}
func TestNewCallIterator_UnsupportedExprName(t *testing.T) {
_, err := influxql.NewCallIterator(
&FloatIterator{},
influxql.IteratorOptions{
Expr: MustParseExpr(`foobar("value")`),
},
)
if err == nil || err.Error() != "unsupported function call: foobar" {
t.Errorf("unexpected error: %s", err)
}
}
func (e *Engine) CreateIterator(opt influxql.IteratorOptions) (influxql.Iterator, error) {
if call, ok := opt.Expr.(*influxql.Call); ok {
refOpt := opt
refOpt.Expr = call.Args[0].(*influxql.VarRef)
aggregate := true
if opt.Interval.IsZero() {
switch call.Name {
case "first":
aggregate = false
refOpt.Limit = 1
refOpt.Ascending = true
case "last":
aggregate = false
refOpt.Limit = 1
refOpt.Ascending = false
}
}
inputs, err := e.createVarRefIterator(refOpt, aggregate)
if err != nil {
return nil, err
} else if len(inputs) == 0 {
return nil, nil
}
// Wrap each series in a call iterator.
for i, input := range inputs {
if opt.InterruptCh != nil {
input = influxql.NewInterruptIterator(input, opt.InterruptCh)
}
itr, err := influxql.NewCallIterator(input, opt)
if err != nil {
return nil, err
}
inputs[i] = itr
}
return influxql.NewParallelMergeIterator(inputs, opt, runtime.GOMAXPROCS(0)), nil
}
itrs, err := e.createVarRefIterator(opt, false)
if err != nil {
return nil, err
}
itr := influxql.NewSortedMergeIterator(itrs, opt)
if itr != nil && opt.InterruptCh != nil {
itr = influxql.NewInterruptIterator(itr, opt.InterruptCh)
}
return itr, nil
}
func BenchmarkCallIterator_Min_Float(b *testing.B) {
input := GenerateFloatIterator(rand.New(rand.NewSource(0)), b.N)
b.ResetTimer()
b.ReportAllocs()
itr := influxql.NewCallIterator(input, influxql.IteratorOptions{
Expr: MustParseExpr("min(value)"),
Interval: influxql.Interval{Duration: 1 * time.Hour},
}).(influxql.FloatIterator)
for {
if p := itr.Next(); p == nil {
break
}
}
}
func benchmarkCallIterator(b *testing.B, opt influxql.IteratorOptions, pointN int) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
// Create a lightweight point generator.
p := influxql.FloatPoint{Name: "cpu", Value: 100}
input := FloatPointGenerator{
N: pointN,
Fn: func(i int) *influxql.FloatPoint { return &p },
}
// Execute call against input.
itr, err := influxql.NewCallIterator(&input, opt)
if err != nil {
b.Fatal(err)
}
influxql.DrainIterator(itr)
}
}
func (e *Engine) CreateIterator(opt influxql.IteratorOptions) (influxql.Iterator, error) {
if call, ok := opt.Expr.(*influxql.Call); ok {
refOpt := opt
refOpt.Expr = call.Args[0].(*influxql.VarRef)
inputs, err := e.createVarRefIterator(refOpt)
if err != nil {
return nil, err
} else if len(inputs) == 0 {
return nil, nil
}
// Wrap each series in a call iterator.
for i, input := range inputs {
if opt.InterruptCh != nil {
input = influxql.NewInterruptIterator(input, opt.InterruptCh)
}
itr, err := influxql.NewCallIterator(input, opt)
if err != nil {
return nil, err
}
inputs[i] = itr
}
return influxql.NewParallelMergeIterator(inputs, opt, runtime.GOMAXPROCS(0)), nil
}
itrs, err := e.createVarRefIterator(opt)
if err != nil {
return nil, err
}
itr := influxql.NewSortedMergeIterator(itrs, opt)
if itr != nil && opt.InterruptCh != nil {
itr = influxql.NewInterruptIterator(itr, opt.InterruptCh)
}
return itr, nil
}
// CreateIterator returns a single combined iterator for the shards.
func (a Shards) CreateIterator(opt influxql.IteratorOptions) (influxql.Iterator, error) {
if influxql.Sources(opt.Sources).HasSystemSource() {
return a.createSystemIterator(opt)
}
// Create iterators for each shard.
// Ensure that they are closed if an error occurs.
itrs := make([]influxql.Iterator, 0, len(a))
if err := func() error {
for _, sh := range a {
itr, err := sh.CreateIterator(opt)
if err != nil {
return err
}
itrs = append(itrs, itr)
}
return nil
}(); err != nil {
influxql.Iterators(itrs).Close()
return nil, err
}
// Merge into a single iterator.
if opt.MergeSorted() {
return influxql.NewSortedMergeIterator(itrs, opt), nil
}
itr := influxql.NewMergeIterator(itrs, opt)
if opt.Expr != nil {
if expr, ok := opt.Expr.(*influxql.Call); ok && expr.Name == "count" {
opt.Expr = &influxql.Call{
Name: "sum",
Args: expr.Args,
}
}
}
return influxql.NewCallIterator(itr, opt), nil
}