Merge pull request #46 from mikewilson-dd/support-ro-query

Add read only query support.

Author: filipecosta90

client_test.go

@@ -65,6 +65,20 @@ func TestMatchQuery(t *testing.T) {
 		t.Error(err)
 	}
 
+	checkQueryResults(t, res)
+}
+
+func TestMatchROQuery(t *testing.T) {
+	q := "MATCH (s)-[e]->(d) RETURN s,e,d"
+	res, err := graph.ROQuery(q)
+	if err != nil {
+		t.Error(err)
+	}
+
+	checkQueryResults(t, res)
+}
+
+func checkQueryResults(t *testing.T, res *QueryResult) {
 	assert.Equal(t, len(res.results), 1, "expecting 1 result record")
 
 	res.Next()
@@ -120,6 +134,12 @@ func TestCreateQuery(t *testing.T) {
 	assert.Equal(t, w.Label, "WorkPlace", "Unexpected node label.")
 }
 
+func TestCreateROQueryFailure(t *testing.T) {
+	q := "CREATE (w:WorkPlace {name:'RedisLabs'})"
+	_, err := graph.ROQuery(q)
+	assert.NotNil(t, err, "error should not be nil")
+}
+
 func TestErrorReporting(t *testing.T) {
 	q := "RETURN toupper(5)"
 	res, err := graph.Query(q)

graph.go

@@ -108,6 +108,17 @@ func (g *Graph) Query(q string) (*QueryResult, error) {
 	return QueryResultNew(g, r)
 }
 
+// ROQuery executes a read only query against the graph.
+func (g *Graph) ROQuery(q string) (*QueryResult, error) {
+
+	r, err := g.Conn.Do("GRAPH.RO_QUERY", g.Id, q, "--compact")
+	if err != nil {
+		return nil, err
+	}
+
+	return QueryResultNew(g, r)
+}
+
 func (g *Graph) ParameterizedQuery(q string, params map[string]interface{}) (*QueryResult, error) {
 	if(params != nil){
 		q = BuildParamsHeader(params) + q