Function removePredsFromQuery

edgraph/access.go:1314–1356

removePredsFromQuery removes all the predicates in blockedPreds from all the queries in gqs.

(gqs []*dql.GraphQuery,
	blockedPreds map[string]struct{})

// removePredsFromQuery removes all the predicates in blockedPreds
// from all the queries in gqs.
func removePredsFromQuery(gqs []*dql.GraphQuery,
	blockedPreds map[string]struct{}) []*dql.GraphQuery {

	filteredGQs := gqs[:0]
L:
	for _, gq := range gqs {
		if gq.Func != nil && len(gq.Func.Attr) > 0 {
			if _, ok := blockedPreds[gq.Func.Attr]; ok {
				continue
			}
		}
		if len(gq.Attr) > 0 {
			if _, ok := blockedPreds[gq.Attr]; ok {
				continue
			}
			if gq.Attr == "val" {
				// TODO (Anurag): If val supports multiple variables, this would
				// need an upgrade
				for _, variable := range gq.NeedsVar {
					if _, ok := blockedPreds[variable.Name]; ok {
						continue L
					}
				}
			}
		}

		order := gq.Order[:0]
		for _, ord := range gq.Order {
			if _, ok := blockedPreds[ord.Attr]; ok {
				continue
			}
			order = append(order, ord)
		}

		gq.Order = order
		gq.Filter = removeFilters(gq.Filter, blockedPreds)
		gq.GroupbyAttrs = removeGroupBy(gq.GroupbyAttrs, blockedPreds)
		gq.Children = removePredsFromQuery(gq.Children, blockedPreds)
		filteredGQs = append(filteredGQs, gq)
	}

	return filteredGQs
}

func removeVarsFromQueryVars(gqs []*dql.Vars,
	blockedVars map[string]struct{}) []*dql.Vars {