diff --git a/executor.go b/executor.go
index d4a4aea38..d1fc96ac0 100644
--- a/executor.go
+++ b/executor.go
@@ -3954,11 +3954,7 @@ func (e *executor) translateCalls(ctx context.Context, defaultIndexName string,
 
 	// Generate a list of all used
 	keySets := make(map[string]map[string]struct{})
-	writable := false
 	for _, c := range calls {
-		if c.Writable() {
-			writable = true
-		}
 		if err := e.collectCallKeySets(ctx, defaultIndexName, c, keySets); err != nil {
 			return err
 		}
@@ -3975,14 +3971,14 @@ func (e *executor) translateCalls(ctx context.Context, defaultIndexName string,
 		if !idx.Keys() || len(keySets) == 0 {
 			continue
 		}
-		if keyMaps[indexName], err = e.Cluster.translateIndexKeySet(ctx, indexName, keySet, writable); err != nil {
+		if keyMaps[indexName], err = e.Cluster.translateIndexKeySet(ctx, indexName, keySet, true); err != nil {
 			return err
 		}
 	}
 
 	// Translate calls.
 	for _, c := range calls {
-		if err := e.translateCall(ctx, defaultIndexName, c, keyMaps, c.Writable()); err != nil {
+		if err := e.translateCall(ctx, defaultIndexName, c, keyMaps, true); err != nil {
 			return err
 		}
 	}
diff --git a/executor_test.go b/executor_test.go
index c5a26a6b0..e4267d5a1 100644
--- a/executor_test.go
+++ b/executor_test.go
@@ -5667,6 +5667,21 @@ func TestExecutor_Execute_NoIndex(t *testing.T) {
 	}
 }
 
+func TestExecutor_Translate_NoKeys(t *testing.T) {
+	c := test.MustRunCluster(t, 1)
+	defer c.Close()
+
+	c.CreateField(t, "i", pilosa.IndexOptions{}, "k", pilosa.OptFieldKeys())
+	c.Query(t, "i", `Set(1, k="a")`)
+	c.Query(t, "i", `Set(2, k="b")`)
+	resp := c.Query(t, "i", `Count(Union(Row(k="a"), Row(k="b"), Row(k="c")))`)
+	if len(resp.Results) != 1 {
+		t.Errorf("expected one result but got %v", resp.Results)
+	} else if resp.Results[0] != uint64(2) {
+		t.Errorf("expected 2 but got %v", resp.Results[0])
+	}
+}
+
 func TestExecutor_Execute_CountDistinct(t *testing.T) {
 	data, err := ioutil.ReadFile("testdata/schema.json")
 	if err != nil {