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Alerting: Fix mathexp.NoData cannot be reduced (#55347)

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This commit fixes a bug where queries from datasources such as InfluxDB that returned no data would not create a DatasourceNoData alert, but instead an error "can only reduce type series, got type noData".
This commit is contained in:
George Robinson
2022-09-21 10:01:51 +01:00
committed by GitHub
parent 28ebdf1641
commit 7d20766ae9
2 changed files with 29 additions and 0 deletions
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2
pkg/expr/commands.go
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@ -171,6 +171,8 @@ func (gr *ReduceCommand) Execute(_ context.Context, vars mathexp.Vars) (mathexp.
Text: fmt.Sprintf("Reduce operation is not needed. Input query or expression %s is already reduced data.", gr.VarToReduce),
})
newRes.Values = append(newRes.Values, copyV)
case mathexp.NoData:
newRes.Values = append(newRes.Values, v.New())
default:
return newRes, fmt.Errorf("can only reduce type series, got type %v", val.Type())
}