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app/vmselect/promql: explain why empty timeseries arent removed in transformLabelValue

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Aliaksandr Valialkin 2019-08-21 11:29:07 +03:00
parent db1de4277c
commit 491b1762c8
1 changed files with 2 additions and 0 deletions
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2
app/vmselect/promql/transform.go
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@ -904,6 +904,8 @@ func transformLabelValue(tfa *transformFuncArg) ([]*timeseries, error) {
values[i] = v
}
}
// Do not remove timeseries with only NaN values, so `default` could be applied to them:
// label_value(q, "label") default 123
return rvs, nil
}