コード例 #1
0
ファイル: merger.go プロジェクト: carriercomm/facette
// modify the series to have the union of the columns from all
// StreamQueries
func (cme *Merger) fixFields(s *protocol.Series) {
	if !cme.mergeColumns {
		return
	}

	idx := cme.lastStreamIdx
	mapping := cme.resultFieldsPerStream[idx]
	if mapping == nil {
		for _, f := range cme.resultFields {
			index := -1
			for i, sf := range s.Fields {
				if sf == f {
					index = i
					break
				}
			}
			mapping = append(mapping, index)
			cme.resultFieldsPerStream[idx] = mapping
		}
	}

	s.Fields = cme.resultFields
	p := s.Points[0]
	originalValues := p.Values
	p.Values = nil
	for _, i := range mapping {
		if i == -1 {
			p.Values = append(p.Values, nil)
			continue
		}
		p.Values = append(p.Values, originalValues[i])
	}
}
コード例 #2
0
ファイル: merge_engine.go プロジェクト: aiyi/influxdb
func (me *MergeEngine) Yield(s *protocol.Series) (bool, error) {
	oldName := s.Name
	s.Name = &me.name
	s.Fields = append(s.Fields, "_orig_series")
	for _, p := range s.Points {
		p.Values = append(p.Values, &protocol.FieldValue{StringValue: oldName})
	}
	return me.next.Yield(s)
}
コード例 #3
0
ファイル: filtering.go プロジェクト: neurodrone/influxdb
func Filter(query *parser.SelectQuery, series *protocol.Series) (*protocol.Series, error) {
	if query.GetWhereCondition() == nil {
		return series, nil
	}

	columns := map[string]struct{}{}
	if query.GetFromClause().Type == parser.FromClauseInnerJoin {
	outer:
		for t, cs := range query.GetResultColumns() {
			for _, c := range cs {
				// if this is a wildcard select, then drop all columns and
				// just use '*'
				if c == "*" {
					columns = make(map[string]struct{}, 1)
					columns[c] = struct{}{}
					break outer
				}
				columns[t.Name+"."+c] = struct{}{}
			}
		}
	} else {
		for _, cs := range query.GetResultColumns() {
			for _, c := range cs {
				columns[c] = struct{}{}
			}
		}
	}

	points := series.Points
	series.Points = nil
	for _, point := range points {
		ok, err := matches(query.GetWhereCondition(), series.Fields, point)

		if err != nil {
			return nil, err
		}

		if ok {
			filterColumns(columns, series.Fields, point)
			series.Points = append(series.Points, point)
		}
	}

	if _, ok := columns["*"]; !ok {
		newFields := []string{}
		for _, f := range series.Fields {
			if _, ok := columns[f]; !ok {
				continue
			}

			newFields = append(newFields, f)
		}
		series.Fields = newFields
	}
	return series, nil
}