From f0ffa74fbc363734e37912b3235935aceea6cca2 Mon Sep 17 00:00:00 2001
From: Martin Vu <22mvu7@gmail.com>
Date: Sat, 25 Jul 2026 02:26:48 -0700
Subject: [PATCH] Fix FilledAreaPlot x-value validation across groups

---
 .../visualization/filledAreaPlot/FilledAreaPlotOpDesc.scala     | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/common/workflow-operator/src/main/scala/org/apache/texera/amber/operator/visualization/filledAreaPlot/FilledAreaPlotOpDesc.scala b/common/workflow-operator/src/main/scala/org/apache/texera/amber/operator/visualization/filledAreaPlot/FilledAreaPlotOpDesc.scala
index 92435342db9..975cc4d8929 100644
--- a/common/workflow-operator/src/main/scala/org/apache/texera/amber/operator/visualization/filledAreaPlot/FilledAreaPlotOpDesc.scala
+++ b/common/workflow-operator/src/main/scala/org/apache/texera/amber/operator/visualization/filledAreaPlot/FilledAreaPlotOpDesc.scala
@@ -121,7 +121,7 @@ class FilledAreaPlotOpDesc extends PythonOperatorDescriptor {
        |                if x_values == None:
        |                    x_values = set(group[$x].unique())
        |                elif set(group[$x].unique()).intersection(x_values):
-       |                    X_values = x_values.union(set(group[$x].unique()))
+       |                    x_values = x_values.union(set(group[$x].unique()))
        |                elif not set(group[$x].unique()).intersection(x_values):
        |                    count += 1
        |                    if count > tolerance: