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Some example charts: <img width="1725" alt="Screenshot 2024-05-16 at 16 42 15" src="https://github.com/QuesmaOrg/quesma/assets/5407146/4a2d4731-deb6-4370-84af-399463a04c3c"> <img width="1720" alt="Screenshot 2024-05-16 at 16 40 43" src="https://github.com/QuesmaOrg/quesma/assets/5407146/89d01eb3-9ba1-4e66-9e19-efea6384c87d">
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,109 @@ | ||
| package pipeline_aggregations | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "mitmproxy/quesma/logger" | ||
| "mitmproxy/quesma/model" | ||
| "mitmproxy/quesma/queryprocessor" | ||
| "mitmproxy/quesma/util" | ||
| "strings" | ||
| ) | ||
|
|
||
| type AverageBucket struct { | ||
| ctx context.Context | ||
| Parent string | ||
| } | ||
|
|
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| func NewAverageBucket(ctx context.Context, bucketsPath string) AverageBucket { | ||
| const delimiter = ">" | ||
| withoutUnnecessarySuffix, _ := strings.CutSuffix(bucketsPath, delimiter+BucketsPathCount) | ||
| lastDelimiterIdx := strings.LastIndex(withoutUnnecessarySuffix, delimiter) | ||
| var parent string | ||
| if lastDelimiterIdx+1 < len(withoutUnnecessarySuffix) { | ||
| parent = withoutUnnecessarySuffix[lastDelimiterIdx+1:] | ||
| } else { | ||
| logger.WarnWithCtx(ctx).Msgf("invalid bucketsPath: %s, withoutUnnecessarySuffix: %s. Using empty string as parent.", bucketsPath, withoutUnnecessarySuffix) | ||
| parent = "" | ||
| } | ||
| return AverageBucket{ctx: ctx, Parent: parent} | ||
| } | ||
|
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| func (query AverageBucket) IsBucketAggregation() bool { | ||
| return false | ||
| } | ||
|
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| func (query AverageBucket) TranslateSqlResponseToJson(rows []model.QueryResultRow, level int) []model.JsonMap { | ||
| if len(rows) == 0 { | ||
| logger.WarnWithCtx(query.ctx).Msg("no rows returned for average bucket aggregation") | ||
| return []model.JsonMap{{}} | ||
| } | ||
| var response []model.JsonMap | ||
| for _, row := range rows { | ||
| response = append(response, model.JsonMap{"value": row.Cols[len(row.Cols)-1].Value}) | ||
| } | ||
| return response | ||
| } | ||
|
|
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| func (query AverageBucket) CalculateResultWhenMissing(qwa *model.Query, parentRows []model.QueryResultRow) []model.QueryResultRow { | ||
| resultRows := make([]model.QueryResultRow, 0) | ||
| if len(parentRows) == 0 { | ||
| return resultRows // maybe null? | ||
| } | ||
| qp := queryprocessor.NewQueryProcessor(query.ctx) | ||
| parentFieldsCnt := len(parentRows[0].Cols) - 2 // -2, because row is [parent_cols..., current_key, current_value] | ||
| // in calculateSingleAvgBucket we calculate avg all current_keys with the same parent_cols | ||
| // so we need to split into buckets based on parent_cols | ||
| for _, parentRowsOneBucket := range qp.SplitResultSetIntoBuckets(parentRows, parentFieldsCnt) { | ||
| resultRows = append(resultRows, query.calculateSingleAvgBucket(parentRowsOneBucket)) | ||
| } | ||
| return resultRows | ||
| } | ||
|
|
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| // we're sure len(parentRows) > 0 | ||
| func (query AverageBucket) calculateSingleAvgBucket(parentRows []model.QueryResultRow) model.QueryResultRow { | ||
| if len(parentRows) == 0 { | ||
| logger.WarnWithCtx(query.ctx).Msg("no parent rows, should NEVER happen") | ||
| return model.QueryResultRow{} | ||
| } | ||
|
|
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| var resultValue float64 | ||
| rowsCnt := 0 | ||
| if _, firstRowValueIsFloat := util.ExtractFloat64Maybe(parentRows[0].LastColValue()); firstRowValueIsFloat { | ||
| sum := 0.0 | ||
| for _, parentRow := range parentRows { | ||
| value, ok := util.ExtractFloat64Maybe(parentRow.LastColValue()) | ||
| if ok { | ||
| sum += value | ||
| rowsCnt++ | ||
| } else { | ||
| logger.WarnWithCtx(query.ctx).Msgf("could not convert value to float: %v, type: %T. Skipping", parentRow.LastColValue(), parentRow.LastColValue()) | ||
| } | ||
| } | ||
| resultValue = sum / float64(rowsCnt) | ||
| } else { | ||
| var sum int64 | ||
| for _, parentRow := range parentRows { | ||
| value, ok := util.ExtractInt64Maybe(parentRow.LastColValue()) | ||
| if ok { | ||
| sum += value | ||
| rowsCnt++ | ||
| } else { | ||
| logger.WarnWithCtx(query.ctx).Msgf("could not convert value to int: %v, type: %T. Skipping", parentRow.LastColValue(), parentRow.LastColValue()) | ||
| } | ||
| } | ||
| resultValue = float64(sum) / float64(rowsCnt) | ||
| } | ||
|
|
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| resultRow := parentRows[0].Copy() | ||
| resultRow.Cols[len(resultRow.Cols)-1].Value = resultValue | ||
| return resultRow | ||
| } | ||
|
|
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| func (query AverageBucket) PostprocessResults(rowsFromDB []model.QueryResultRow) []model.QueryResultRow { | ||
| return rowsFromDB | ||
| } | ||
|
|
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| func (query AverageBucket) String() string { | ||
| return fmt.Sprintf("avg_bucket(%s)", query.Parent) | ||
| } |
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