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Use CopyTo when resetting histogram in stats iterator

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The histogram stats iterator does not fully clear the histogram object
and is not resilient to new fields being added to the histogram type.

To resolve the issue, the commit uses the CopyTo methods which should
be future proof to new fields being added.

Signed-off-by: Filip Petkovski <filip.petkovsky@gmail.com>
This commit is contained in:
Filip Petkovski 2024-07-31 11:17:09 +02:00 committed by György Krajcsovits
parent 6d7ed08850
commit 8f9751b00d
1 changed files with 14 additions and 6 deletions
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20
promql/histogram_stats_iterator.go
View file

@ -63,9 +63,13 @@ func (f *histogramStatsIterator) AtHistogram(h *histogram.Histogram) (int64, *hi
return t, h
}
h.CounterResetHint = f.getResetHint(f.currentH)
h.Count = f.currentH.Count
h.Sum = f.currentH.Sum
returnValue := histogram.Histogram{
CounterResetHint: f.getResetHint(f.currentH),
Count: f.currentH.Count,
Sum: f.currentH.Sum,
}
returnValue.CopyTo(h)
f.setLastH(f.currentH)
return t, h
}
@ -91,9 +95,13 @@ func (f *histogramStatsIterator) AtFloatHistogram(fh *histogram.FloatHistogram)
return t, fh
}
fh.CounterResetHint = f.getFloatResetHint(f.currentFH.CounterResetHint)
fh.Count = f.currentFH.Count
fh.Sum = f.currentFH.Sum
returnValue := histogram.FloatHistogram{
CounterResetHint: f.getFloatResetHint(f.currentFH.CounterResetHint),
Count: f.currentFH.Count,
Sum: f.currentFH.Sum,
}
returnValue.CopyTo(fh)
f.setLastFH(f.currentFH)
return t, fh
}