// SetVars sets up the environment for InsertStatement to call it's Run function
func (i *InsertStatement) SetVars(s *ponyExpress.StoreFront) chan<- string {
// Set the #series at 1 to start
i.series = 1
// Num series is the product of the cardinality of the tags
for _, tmpl := range i.Templates[0:i.TagCount] {
i.series *= tmpl.numSeries()
}
// make stringers from the templates
i.stringers = i.Templates.Init(i.series)
// Set the time function, keeps track of 'time' of the points being created
i.time = i.Timestamp.Time(s.StartDate, i.series, s.Precision)
// Set a commune on the StoreFront
s.Lock()
comCh := s.SetCommune(i.Name)
s.Unlock()
// Set the tracer
i.Tracer = ponyExpress.NewTracer(i.tags())
return comCh
}
