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Fix panic when aggregator param is not a literal.

Browse source 
The return value for checkForSeriesSetExpansion
is always nil, simplify.

Signed-off-by: Brian Brazil <brian.brazil@robustperception.io>
This commit is contained in:
Brian Brazil 2019-03-01 12:00:14 +00:00
parent d8c06bb2b7
commit 858c363e94
3 changed files with 24 additions and 14 deletions
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5
promql/ast.go
View file

@ -260,6 +260,11 @@ func Walk(v Visitor, node Node, path []Node) error {
}
}
case *AggregateExpr:
if n.Param != nil {
if err := Walk(v, n.Param, path); err != nil {
return err
}
}
if err := Walk(v, n.Expr, path); err != nil {
return err
}

19
promql/engine.go
View file

@ -614,7 +614,7 @@ func extractFuncFromPath(p []Node) string {
return extractFuncFromPath(p[:len(p)-1])
}
func checkForSeriesSetExpansion(ctx context.Context, expr Expr) error {
func checkForSeriesSetExpansion(ctx context.Context, expr Expr) {
switch e := expr.(type) {
case *MatrixSelector:
if e.series == nil {
@ -635,7 +635,6 @@ func checkForSeriesSetExpansion(ctx context.Context, expr Expr) error {
}
}
}
return nil
}
func expandSeriesSet(ctx context.Context, it storage.SeriesSet) (res []storage.Series, err error) {
@ -966,9 +965,7 @@ func (ev *evaluator) eval(expr Expr) Value {
}
sel := e.Args[matrixArgIndex].(*MatrixSelector)
if err := checkForSeriesSetExpansion(ev.ctx, sel); err != nil {
ev.error(err)
}
checkForSeriesSetExpansion(ev.ctx, sel)
mat := make(Matrix, 0, len(sel.series)) // Output matrix.
offset := durationMilliseconds(sel.Offset)
selRange := durationMilliseconds(sel.Range)
@ -1100,9 +1097,7 @@ func (ev *evaluator) eval(expr Expr) Value {
})
case *VectorSelector:
if err := checkForSeriesSetExpansion(ev.ctx, e); err != nil {
ev.error(err)
}
checkForSeriesSetExpansion(ev.ctx, e)
mat := make(Matrix, 0, len(e.series))
it := storage.NewBuffer(durationMilliseconds(LookbackDelta))
for i, s := range e.series {
@ -1175,9 +1170,7 @@ func durationToInt64Millis(d time.Duration) int64 {
// vectorSelector evaluates a *VectorSelector expression.
func (ev *evaluator) vectorSelector(node *VectorSelector, ts int64) Vector {
if err := checkForSeriesSetExpansion(ev.ctx, node); err != nil {
ev.error(err)
}
checkForSeriesSetExpansion(ev.ctx, node)
var (
vec = make(Vector, 0, len(node.series))
@ -1249,9 +1242,7 @@ func putPointSlice(p []Point) {
// matrixSelector evaluates a *MatrixSelector expression.
func (ev *evaluator) matrixSelector(node *MatrixSelector) Matrix {
if err := checkForSeriesSetExpansion(ev.ctx, node); err != nil {
ev.error(err)
}
checkForSeriesSetExpansion(ev.ctx, node)
var (
offset = durationMilliseconds(node.Offset)

14
promql/testdata/aggregators.test vendored
View file

@ -153,6 +153,7 @@ load 5m
http_requests{job="app-server", instance="1", group="production"} 0+60x10
http_requests{job="app-server", instance="0", group="canary"} 0+70x10
http_requests{job="app-server", instance="1", group="canary"} 0+80x10
foo 3+0x10
eval_ordered instant at 50m topk(3, http_requests)
http_requests{group="canary", instance="1", job="app-server"} 800
@ -207,6 +208,12 @@ eval_ordered instant at 50m topk(9999999999, http_requests{job="api-server",grou
http_requests{job="api-server", instance="0", group="production"} 100
http_requests{job="api-server", instance="2", group="production"} NaN
# Bug #5276.
eval_ordered instant at 50m topk(scalar(foo), http_requests)
http_requests{group="canary", instance="1", job="app-server"} 800
http_requests{group="canary", instance="0", job="app-server"} 700
http_requests{group="production", instance="1", job="app-server"} 600
clear
# Tests for count_values.
@ -257,8 +264,15 @@ load 10s
data{test="uneven samples",point="a"} 0
data{test="uneven samples",point="b"} 1
data{test="uneven samples",point="c"} 4
foo .8
eval instant at 1m quantile without(point)(0.8, data)
{test="two samples"} 0.8
{test="three samples"} 1.6
{test="uneven samples"} 2.8
# Bug #5276.
eval instant at 1m quantile without(point)(scalar(foo), data)
{test="two samples"} 0.8
{test="three samples"} 1.6
{test="uneven samples"} 2.8