Fix frame check.

vega · Feb 16, 2019 · 7b7d4c6 · 7b7d4c6
1 parent 4a682bd
commit 7b7d4c6
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/compile/data/window.ts b/src/compile/data/window.ts
@@ -63,7 +63,7 @@ export class WindowTransformNode extends DataFlowNode {
     const frame = this.transform.frame;
     const groupby = this.transform.groupby;
 
-    if (frame && frame[0] === null && frame[1] === 0 && ops.every(o => isAggregateOp(o))) {
+    if (frame && frame[0] === null && frame[1] === null && ops.every(o => isAggregateOp(o))) {
       // when the window does not rely on any particular window ops or frame, switch to a simpler and more efficient joinaggregate
       return {
         type: 'joinaggregate',