func (self *Coordinator) RunQueryWithContext(user common.User, database string, queryString string, p engine.Processor, requestContext *api.RequestContext) (err error) {
log.Info("Start Query: db: %s, u: %s, q: %s", database, user.GetName(), queryString)
runningQuery := NewRunningQuery(user.GetName(), database, queryString, time.Now(), requestContext.RemoteAddr())
self.monitor.StartQuery(runningQuery)
defer func() {
self.monitor.EndQuery(runningQuery)
}()
defer func(t time.Time) {
log.Debug("End Query: db: %s, u: %s, q: %s, t: %s", database, user.GetName(), queryString, time.Now().Sub(t))
}(time.Now())
// don't let a panic pass beyond RunQuery
defer common.RecoverFunc(database, queryString, nil)
q, err := parser.ParseQuery(queryString)
if err != nil {
return err
}
for _, query := range q {
err := self.runSingleQuery(user, database, query, p)
if err != nil {
return err
}
}
return nil
}
func (self *Coordinator) InterpolateValuesAndCommit(query string, db string, series *protocol.Series, targetName string, assignSequenceNumbers bool) error {
defer common.RecoverFunc(db, query, nil)
targetName = strings.Replace(targetName, ":series_name", *series.Name, -1)
type sequenceKey struct {
seriesName string
timestamp int64
}
sequenceMap := make(map[sequenceKey]int)
r, _ := regexp.Compile(`\[.*?\]`)
// get the fields that are used in the target name
fieldsInTargetName := r.FindAllString(targetName, -1)
fieldsIndeces := make([]int, 0, len(fieldsInTargetName))
for i, f := range fieldsInTargetName {
f = f[1 : len(f)-1]
fieldsIndeces = append(fieldsIndeces, series.GetFieldIndex(f))
fieldsInTargetName[i] = f
}
fields := make([]string, 0, len(series.Fields)-len(fieldsIndeces))
// remove the fields used in the target name from the series fields
nextfield:
for i, f := range series.Fields {
for _, fi := range fieldsIndeces {
if fi == i {
continue nextfield
}
}
fields = append(fields, f)
}
if r.MatchString(targetName) {
serieses := map[string]*protocol.Series{}
for _, point := range series.Points {
fieldIndex := 0
targetNameWithValues := r.ReplaceAllStringFunc(targetName, func(_ string) string {
value := point.GetFieldValueAsString(fieldsIndeces[fieldIndex])
fieldIndex++
return value
})
p := &protocol.Point{
Values: make([]*protocol.FieldValue, 0, len(point.Values)-len(fieldsIndeces)),
Timestamp: point.Timestamp,
SequenceNumber: point.SequenceNumber,
}
// remove the fields used in the target name from the series fields
nextvalue:
for i, v := range point.Values {
for _, fi := range fieldsIndeces {
if fi == i {
continue nextvalue
}
}
p.Values = append(p.Values, v)
}
if assignSequenceNumbers {
key := sequenceKey{targetNameWithValues, *p.Timestamp}
sequenceMap[key] += 1
sequenceNumber := uint64(sequenceMap[key])
p.SequenceNumber = &sequenceNumber
}
newSeries := serieses[targetNameWithValues]
if newSeries == nil {
newSeries = &protocol.Series{Name: &targetNameWithValues, Fields: fields, Points: []*protocol.Point{p}}
serieses[targetNameWithValues] = newSeries
continue
}
newSeries.Points = append(newSeries.Points, p)
}
seriesSlice := make([]*protocol.Series, 0, len(serieses))
for _, s := range serieses {
seriesSlice = append(seriesSlice, s)
}
if e := self.CommitSeriesData(db, seriesSlice, true); e != nil {
log.Error("Couldn't write data for continuous query: ", e)
}
} else {
newSeries := &protocol.Series{Name: &targetName, Fields: fields, Points: series.Points}
if assignSequenceNumbers {
for _, point := range newSeries.Points {
sequenceMap[sequenceKey{targetName, *point.Timestamp}] += 1
sequenceNumber := uint64(sequenceMap[sequenceKey{targetName, *point.Timestamp}])
point.SequenceNumber = &sequenceNumber
}
}
if e := self.CommitSeriesData(db, []*protocol.Series{newSeries}, true); e != nil {
log.Error("Couldn't write data for continuous query: ", e)
}
}
return nil
}
func (self *ShardData) Query(querySpec *parser.QuerySpec, response chan<- *p.Response) {
log.Debug("QUERY: shard %d, query '%s'", self.Id(), querySpec.GetQueryStringWithTimeCondition())
defer common.RecoverFunc(querySpec.Database(), querySpec.GetQueryStringWithTimeCondition(), func(err interface{}) {
response <- &p.Response{
Type: p.Response_ERROR.Enum(),
ErrorMessage: p.String(fmt.Sprintf("%s", err)),
}
})
// This is only for queries that are deletes or drops. They need to be sent everywhere as opposed to just the local or one of the remote shards.
// But this boolean should only be set to true on the server that receives the initial query.
if querySpec.RunAgainstAllServersInShard {
if querySpec.IsDeleteFromSeriesQuery() {
self.logAndHandleDeleteQuery(querySpec, response)
} else if querySpec.IsDropSeriesQuery() {
self.logAndHandleDropSeriesQuery(querySpec, response)
}
}
if self.IsLocal {
var processor engine.Processor = NewResponseChannelProcessor(NewResponseChannelWrapper(response))
var err error
processor = NewShardIdInserterProcessor(self.Id(), processor)
processor, err = self.getProcessor(querySpec, processor)
if err != nil {
response <- &p.Response{
Type: p.Response_ERROR.Enum(),
ErrorMessage: p.String(err.Error()),
}
log.Error("Error while creating engine: %s", err)
return
}
shard, err := self.store.GetOrCreateShard(self.id)
if err != nil {
response <- &p.Response{
Type: p.Response_ERROR.Enum(),
ErrorMessage: p.String(err.Error()),
}
log.Error("Error while getting shards: %s", err)
return
}
defer self.store.ReturnShard(self.id)
log.Debug("Processor chain: %s\n", engine.ProcessorChain(processor))
err = shard.Query(querySpec, processor)
// if we call Close() in case of an error it will mask the error
if err != nil {
response <- &p.Response{
Type: p.Response_ERROR.Enum(),
ErrorMessage: p.String(err.Error()),
}
return
}
processor.Close()
response <- &p.Response{Type: p.Response_END_STREAM.Enum()}
return
}
if server := self.randomHealthyServer(); server != nil {
log.Debug("Querying server %d for shard %d", server.GetId(), self.Id())
request := self.createRequest(querySpec)
server.MakeRequest(request, response)
return
}
message := fmt.Sprintf("No servers up to query shard %d", self.id)
response <- &p.Response{
Type: p.Response_ERROR.Enum(),
ErrorMessage: &message,
}
log.Error(message)
}