diff --git a/README.en.md b/README.en.md
index 6ab4a87b51ff2e242e5cc23fe75b7f8f8407095d..5a9b59da0815d7385401b79b09ea57dc0f3d5b86 100644
--- a/README.en.md
+++ b/README.en.md
@@ -1,5 +1,7 @@
 # Data Studio Introduction
 
+Notice: DataStudio will not maintenance from 2023.08.23,  we recommend use DataKit + WebDS plugin.
+
 ## Version introduction
 
 This version is version 5.0.0 of opengauss Data Studio, which mainly provides the following functions:
diff --git a/README.md b/README.md
index ac94a42a0a0ce49e96c2e3a9fd46e08512507584..d95b50cf3aee27ac93616c8e3c7a142f39e2d3a3 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # Data Studio介绍
 
+注意：DataStudio 自2023.08.25后放弃维护，所有功能已转移到DataKit的WebDS插件。
+
 ## 版本介绍
 
 本版本为openGauss Data Studio的5.0.0版本，主要提供如下功能：
diff --git a/code/datastudio/src/org.opengauss.mppdbide.view/src/org/opengauss/mppdbide/view/ui/VariableTableWindow.java b/code/datastudio/src/org.opengauss.mppdbide.view/src/org/opengauss/mppdbide/view/ui/VariableTableWindow.java
index 47eea161299e19b2bcb1e9caf9813b32d3348900..6d036828b53d22b69be3c440c40c73310f2c5037 100644
--- a/code/datastudio/src/org.opengauss.mppdbide.view/src/org/opengauss/mppdbide/view/ui/VariableTableWindow.java
+++ b/code/datastudio/src/org.opengauss.mppdbide.view/src/org/opengauss/mppdbide/view/ui/VariableTableWindow.java
@@ -55,6 +55,7 @@ import org.opengauss.mppdbide.view.utils.UIElement;
  * @since 3.0.0
  */
 public class VariableTableWindow extends WindowBase<VariableVo> {
+    public static final String VARIABLE_NULL = "<NULL>";
     /**
      * description: the max number of the variables
      */
@@ -77,7 +78,7 @@ public class VariableTableWindow extends WindowBase<VariableVo> {
      */
     public static void initializeVariableValues () {
         for (int i = 0; i < VARIABLES_MAX_NUM; i++) {
-            variableValues.add("<NULL>");
+            variableValues.add(VARIABLE_NULL);
         }
     }
 
@@ -106,6 +107,9 @@ public class VariableTableWindow extends WindowBase<VariableVo> {
                 if (table.getItems().length > 0) {
                     for (int i = 0; i < table.getItems().length; i++) {
                         String newValue = table.getItems()[i].getText(1);
+                        if (variableValues.size() < i + 1) {
+                            variableValues.add(VARIABLE_NULL);
+                        }
                         String oldValue = variableValues.get(i);
                         if (!newValue.equals(oldValue)) {
                             table.getItems()[i].setBackground(color);
@@ -157,7 +161,7 @@ public class VariableTableWindow extends WindowBase<VariableVo> {
         private String getVariableValue() {
             String value = variableVo.value.toString();
             if ("NULL".equals(value)) {
-                value = "<NULL>";
+                value = VARIABLE_NULL;
             }
             return value;
         }