// getDownsampleFunction returns
func getDownsampleFunction(agg tspb.TimeSeriesQueryAggregator) (downsampleFn, error) {
switch agg {
case tspb.TimeSeriesQueryAggregator_AVG:
return downsampleAvg, nil
case tspb.TimeSeriesQueryAggregator_SUM:
return downsampleSum, nil
case tspb.TimeSeriesQueryAggregator_MAX:
return downsampleMax, nil
case tspb.TimeSeriesQueryAggregator_MIN:
return downsampleMin, nil
}
return nil, errors.Errorf("query specified unknown time series aggregator %s", agg.String())
}
// getExtractionFunction returns
func getExtractionFunction(agg tspb.TimeSeriesQueryAggregator) (extractFn, error) {
switch agg {
case tspb.TimeSeriesQueryAggregator_AVG:
return (roachpb.InternalTimeSeriesSample).Average, nil
case tspb.TimeSeriesQueryAggregator_SUM:
return (roachpb.InternalTimeSeriesSample).Summation, nil
case tspb.TimeSeriesQueryAggregator_MAX:
return (roachpb.InternalTimeSeriesSample).Maximum, nil
case tspb.TimeSeriesQueryAggregator_MIN:
return (roachpb.InternalTimeSeriesSample).Minimum, nil
}
return nil, errors.Errorf("query specified unknown time series aggregator %s", agg.String())
}