32bit Node ID

backend_go/graph_export.go

@@ -15,10 +15,10 @@ func graphFromSparqlBindings(
 	nodeLimit int,
 	includeBNodes bool,
 ) (nodes []Node, edges []Edge) {
-	nodeIDByKey := map[termKey]int{}
+	nodeIDByKey := map[termKey]uint32{}
 	nodeMeta := make([]termMeta, 0, min(nodeLimit, 4096))
 
-	getOrAdd := func(term sparqlTerm) (int, bool) {
+	getOrAdd := func(term sparqlTerm) (uint32, bool) {
 		if term.Type == "" || term.Value == "" {
 			return 0, false
 		}
@@ -46,7 +46,7 @@ func graphFromSparqlBindings(
 		if len(nodeMeta) >= nodeLimit {
 			return 0, false
 		}
-		nid := len(nodeMeta)
+		nid := uint32(len(nodeMeta))
 		nodeIDByKey[key] = nid
 		nodeMeta = append(nodeMeta, meta)
 		return nid, true
@@ -78,7 +78,7 @@ func graphFromSparqlBindings(
 	nodes = make([]Node, len(nodeMeta))
 	for i, m := range nodeMeta {
 		nodes[i] = Node{
-			ID:       i,
+			ID:       uint32(i),
 			TermType: m.termType,
 			IRI:      m.iri,
 			Label:    nil,