diff --git a/src/main/java/com/alibaba/druid/sql/dialect/mysql/visitor/MySqlParameterizedOutputVisitor.java b/src/main/java/com/alibaba/druid/sql/dialect/mysql/visitor/MySqlParameterizedOutputVisitor.java
index 8354d588b0..1aed2dc2de 100644
--- a/src/main/java/com/alibaba/druid/sql/dialect/mysql/visitor/MySqlParameterizedOutputVisitor.java
+++ b/src/main/java/com/alibaba/druid/sql/dialect/mysql/visitor/MySqlParameterizedOutputVisitor.java
@@ -16,7 +16,9 @@
 package com.alibaba.druid.sql.dialect.mysql.visitor;
 
 import java.util.List;
+import java.util.Properties;
 
+import com.alibaba.druid.sql.ast.SQLObject;
 import com.alibaba.druid.sql.ast.expr.SQLBinaryOpExpr;
 import com.alibaba.druid.sql.ast.expr.SQLCharExpr;
 import com.alibaba.druid.sql.ast.expr.SQLIdentifierExpr;
@@ -33,7 +35,9 @@ import com.alibaba.druid.sql.visitor.ParameterizedVisitor;
 
 public class MySqlParameterizedOutputVisitor extends MySqlOutputVisitor implements ParameterizedVisitor {
 
-    private int replaceCount;
+    private boolean shardingSupport = true;
+
+    private int     replaceCount;
 
     public MySqlParameterizedOutputVisitor(){
         this(new StringBuilder());
@@ -41,6 +45,27 @@ public class MySqlParameterizedOutputVisitor extends MySqlOutputVisitor implemen
 
     public MySqlParameterizedOutputVisitor(Appendable appender){
         super(appender);
+
+        configFromPropety(System.getProperties());
+    }
+
+    public void configFromPropety(Properties properties) {
+        {
+            String property = properties.getProperty("druid.parameterized.shardingSupport");
+            if ("true".equals(property)) {
+                this.setShardingSupport(true);
+            } else if ("false".equals(property)) {
+                this.setShardingSupport(false);
+            }
+        }
+    }
+
+    public boolean isShardingSupport() {
+        return shardingSupport;
+    }
+
+    public void setShardingSupport(boolean shardingSupport) {
+        this.shardingSupport = shardingSupport;
     }
 
     public int getReplaceCount() {
@@ -57,7 +82,13 @@ public class MySqlParameterizedOutputVisitor extends MySqlOutputVisitor implemen
 
     public boolean visit(SQLIdentifierExpr x) {
         final String name = x.getName();
-        if (x.getParent() instanceof SQLExprTableSource || x.getParent() instanceof SQLPropertyExpr) {
+        boolean computeSharding = isShardingSupport();
+        if (computeSharding) {
+            SQLObject parent = x.getParent();
+            computeSharding = parent instanceof SQLExprTableSource || parent instanceof SQLPropertyExpr;
+        }
+        
+        if (computeSharding) {
             int pos = name.lastIndexOf('_');
             if (pos != -1 && pos != name.length()) {
                 boolean isNumber = true;
diff --git a/src/main/resources/support/http/resources/wall.html b/src/main/resources/support/http/resources/wall.html
index 43a71ac97e..84988f6c0a 100644
--- a/src/main/resources/support/http/resources/wall.html
+++ b/src/main/resources/support/http/resources/wall.html
@@ -190,13 +190,24 @@
                 var white = whiteList[i];
                 html += "<tr>";
                 html += "<td>" + white.sql + "</td>";
+                
                 if (typeof white.sample == "undefined") {
-                  html += "<td>\"\"</td>";
+                	html += "<td></td>";
                 } else {
-                  html += "<td>" + white.sample + "</td>";
+                	html += "<td>" + white.sample + "</td>";
                 }
-                html += "<td>" + white.executeCount + "</td>";
-                html += "<td>" + white.fetchRowCount + "</td>";
+                
+                if (typeof white.executeCount == "undefined") {
+                	html += "<td></td>";
+                } else {
+                	html += "<td>" + white.executeCount + "</td>";
+                }
+                
+                if (typeof white.fetchRowCount == "undefined") {
+                	html += "<td></td>";
+                } else {
+                	html += "<td>" + white.fetchRowCount + "</td>";
+              	}
                 html += "</tr>";
               }
               $("#dataTable3 tbody").html(html);
@@ -209,13 +220,24 @@
                 var black = blackList[i];
                 html += "<tr>";
                 html += "<td>" + black.sql + "</td>";
+                
                 if (typeof black.sample == "undefined") {
-                  html += "<td>\"\"</td>";
+                	html += "<td></td>";
                 } else {
-                  html += "<td>" + black.sample + "</td>";
+                	html += "<td>" + black.sample + "</td>";
                 }
-                html += "<td>" + black.executeCount + "</td>";
-                html += "<td>" + black.fetchRowCount + "</td>";
+                
+                if (typeof black.executeCount == "undefined") {
+                	html += "<td></td>";
+                } else {
+                	html += "<td>" + black.executeCount + "</td>";
+                }
+                
+                if (typeof black.fetchRowCount == "undefined") {
+                	html += "<td></td>";
+                } else {
+                	html += "<td>" + black.fetchRowCount + "</td>";
+              	}
                 html += "</tr>";
               }
               $("#dataTable4 tbody").html(html);
diff --git a/src/test/java/com/alibaba/druid/bvt/filter/wall/MySqlWallPermitTableTest.java b/src/test/java/com/alibaba/druid/bvt/filter/wall/MySqlWallPermitTableTest.java
index 90ff591693..c9f3ca8428 100644
--- a/src/test/java/com/alibaba/druid/bvt/filter/wall/MySqlWallPermitTableTest.java
+++ b/src/test/java/com/alibaba/druid/bvt/filter/wall/MySqlWallPermitTableTest.java
@@ -25,7 +25,7 @@ import com.alibaba.druid.wall.WallUtils;
 public class MySqlWallPermitTableTest extends TestCase {
 
     public void test_default() throws Exception {
-        Assert.assertFalse(WallUtils.isValidateMySql("select benchmark( 500000, sha1( 'test' ) ) FROM X"));
+        Assert.assertFalse(WallUtils.isValidateMySql("select * from t union select benchmark( 500000, sha1( 'test' ) ) FROM X"));
     }
     
     public void test_allow() throws Exception {
diff --git a/src/test/java/com/alibaba/druid/bvt/filter/wall/OracleWallPermitFunctionTest.java b/src/test/java/com/alibaba/druid/bvt/filter/wall/OracleWallPermitFunctionTest.java
index 809958d103..b4f6fd4a0c 100644
--- a/src/test/java/com/alibaba/druid/bvt/filter/wall/OracleWallPermitFunctionTest.java
+++ b/src/test/java/com/alibaba/druid/bvt/filter/wall/OracleWallPermitFunctionTest.java
@@ -30,7 +30,7 @@ import com.alibaba.druid.wall.WallUtils;
 public class OracleWallPermitFunctionTest extends TestCase {
 
     public void test_permitTable() throws Exception {
-        Assert.assertFalse(WallUtils.isValidateOracle("select SYS_CONTEXT ('USERENV', 'CURRENT_USER') from X"));
+        Assert.assertFalse(WallUtils.isValidateOracle("select * from t union select SYS_CONTEXT ('USERENV', 'CURRENT_USER') from X"));
     }
     
     public void test_permitTable_allow() throws Exception {
diff --git a/src/test/java/com/alibaba/druid/bvt/sql/mysql/MySqlParameterizedOutputVisitorTest_3.java b/src/test/java/com/alibaba/druid/bvt/sql/mysql/MySqlParameterizedOutputVisitorTest_3.java
new file mode 100644
index 0000000000..150dd7b9a8
--- /dev/null
+++ b/src/test/java/com/alibaba/druid/bvt/sql/mysql/MySqlParameterizedOutputVisitorTest_3.java
@@ -0,0 +1,40 @@
+/*
+ * Copyright 1999-2011 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.alibaba.druid.bvt.sql.mysql;
+
+import junit.framework.TestCase;
+
+import org.junit.Assert;
+
+import com.alibaba.druid.sql.visitor.ParameterizedOutputVisitorUtils;
+import com.alibaba.druid.util.JdbcConstants;
+
+public class MySqlParameterizedOutputVisitorTest_3 extends TestCase {
+    protected void setUp() throws Exception {
+        System.setProperty("druid.parameterized.shardingSupport", "false");
+    }
+    
+    protected void tearDown() throws Exception {
+        System.clearProperty("druid.parameterized.shardingSupport");
+    }
+
+    public void test_0() throws Exception {
+        String sql = "delete from alerts where not (exists (select metric1_.id from metrics metric1_ where id=alerts.metric_id))";
+        Assert.assertSame(ParameterizedOutputVisitorUtils.parameterize(sql, JdbcConstants.MYSQL), sql);
+    }
+
+    
+}