// addToIndexFromKey will pull the measurement name, series key, and field name from a composite key and add it to the
// database index and measurement fields
func (e *Engine) addToIndexFromKey(key string, fieldType influxql.DataType, index *tsdb.DatabaseIndex) error {
seriesKey, field := seriesAndFieldFromCompositeKey(key)
measurement := tsdb.MeasurementFromSeriesKey(seriesKey)
m := index.CreateMeasurementIndexIfNotExists(measurement)
m.SetFieldName(field)
mf := e.measurementFields[measurement]
if mf == nil {
mf = tsdb.NewMeasurementFields()
e.measurementFields[measurement] = mf
}
if err := mf.CreateFieldIfNotExists(field, fieldType, false); err != nil {
return err
}
_, tags, err := models.ParseKey(seriesKey)
if err == nil {
return err
}
s := tsdb.NewSeries(seriesKey, tags)
s.InitializeShards()
index.CreateSeriesIndexIfNotExists(measurement, s)
return nil
}
// MeasurementFields returns the measurement fields for a measurement.
func (e *Engine) MeasurementFields(measurement string) *tsdb.MeasurementFields {
e.mu.RLock()
m := e.measurementFields[measurement]
e.mu.RUnlock()
if m != nil {
return m
}
e.mu.Lock()
m = e.measurementFields[measurement]
if m == nil {
m = tsdb.NewMeasurementFields()
e.measurementFields[measurement] = m
}
e.mu.Unlock()
return m
}