// SelectTags returns a list of non-field tags in the SELECT section of stmt.
func (m *Measurement) SelectTags(stmt *influxql.SelectStatement) []string {
set := newStringSet()
for _, name := range stmt.NamesInSelect() {
if !m.HasField(name) && m.HasTagKey(name) {
set.add(name)
}
}
return set.list()
}
// SelectFields returns a list of fields in the SELECT section of stmt.
func (m *Measurement) SelectFields(stmt *influxql.SelectStatement) []string {
set := newStringSet()
for _, name := range stmt.NamesInSelect() {
if m.HasField(name) {
set.add(name)
continue
}
}
return set.list()
}