Method getValsForUID

worker/task.go:1783–1807

(attr, lang string, uid, ReadTs uint64)

}

func (qs *queryState) getValsForUID(attr, lang string, uid, ReadTs uint64) ([]types.Val, error) {
	key := x.DataKey(attr, uid)
	pl, err := qs.cache.Get(key)
	if err != nil {
		return nil, err
	}

	var vals []types.Val
	var val types.Val
	if lang == "" {
		if schema.State().IsList(attr) {
			// NOTE: we will never reach here if this function is called from handleHasFunction, as
			// @lang is not allowed for list predicates.
			vals, err = pl.AllValues(ReadTs)
		} else {
			val, err = pl.Value(ReadTs)
			vals = append(vals, val)
		}
	} else {
		val, err = pl.ValueForTag(ReadTs, lang)
		vals = append(vals, val)
	}

	return vals, err
}

func matchRegex(value types.Val, regex *cregexp.Regexp) bool {
	return len(value.Value.(string)) > 0 && regex.MatchString(value.Value.(string), true, true) > 0