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Explicit schema check in [Float]Histogram.ReduceResolution

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Signed-off-by: Linas Medziunas <linas.medziunas@gmail.com>
This commit is contained in:
Linas Medziunas 2023-11-25 11:38:15 +02:00
parent 965e603fa7
commit ea1862aab4
2 changed files with 8 additions and 0 deletions
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4
model/histogram/float_histogram.go
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@ -1110,6 +1110,10 @@ func floatBucketsMatch(b1, b2 []float64) bool {
// ReduceResolution reduces the float histogram's spans, buckets into target schema. // ReduceResolution reduces the float histogram's spans, buckets into target schema.
// The target schema must be smaller than the current float histogram's schema. // The target schema must be smaller than the current float histogram's schema.
func (h *FloatHistogram) ReduceResolution(targetSchema int32) *FloatHistogram { func (h *FloatHistogram) ReduceResolution(targetSchema int32) *FloatHistogram {
if targetSchema >= h.Schema {
panic(fmt.Errorf("cannot reduce resolution from schema %d to %d", h.Schema, targetSchema))
}
h.PositiveSpans, h.PositiveBuckets = reduceResolution(h.PositiveSpans, h.PositiveBuckets, h.Schema, targetSchema, false) h.PositiveSpans, h.PositiveBuckets = reduceResolution(h.PositiveSpans, h.PositiveBuckets, h.Schema, targetSchema, false)
h.NegativeSpans, h.NegativeBuckets = reduceResolution(h.NegativeSpans, h.NegativeBuckets, h.Schema, targetSchema, false) h.NegativeSpans, h.NegativeBuckets = reduceResolution(h.NegativeSpans, h.NegativeBuckets, h.Schema, targetSchema, false)
h.Schema = targetSchema h.Schema = targetSchema

4
model/histogram/histogram.go
View file

@ -497,6 +497,10 @@ func (c *cumulativeBucketIterator) At() Bucket[uint64] {
// ReduceResolution reduces the histogram's spans, buckets into target schema. // ReduceResolution reduces the histogram's spans, buckets into target schema.
// The target schema must be smaller than the current histogram's schema. // The target schema must be smaller than the current histogram's schema.
func (h *Histogram) ReduceResolution(targetSchema int32) *Histogram { func (h *Histogram) ReduceResolution(targetSchema int32) *Histogram {
if targetSchema >= h.Schema {
panic(fmt.Errorf("cannot reduce resolution from schema %d to %d", h.Schema, targetSchema))
}
h.PositiveSpans, h.PositiveBuckets = reduceResolution( h.PositiveSpans, h.PositiveBuckets = reduceResolution(
h.PositiveSpans, h.PositiveBuckets, h.Schema, targetSchema, true, h.PositiveSpans, h.PositiveBuckets, h.Schema, targetSchema, true,
) )