diff --git a/src/main/java/com/alibaba/druid/filter/wall/WallConfig.java b/src/main/java/com/alibaba/druid/filter/wall/WallConfig.java
index af3adbf9eb..428ed7d2d3 100644
--- a/src/main/java/com/alibaba/druid/filter/wall/WallConfig.java
+++ b/src/main/java/com/alibaba/druid/filter/wall/WallConfig.java
@@ -172,9 +172,19 @@ public class WallConfig {
     public Set<String> getPermitObjects() {
         return permitObjects;
     }
+    
+    public boolean isPermitObjects(String name) {
+        name = WallVisitorUtils.form(name);
+        return permitObjects.contains(name);
+    }
 
-    public boolean containsPermitSchema(String name) {
+    public boolean isPermitSchema(String name) {
         name = WallVisitorUtils.form(name);
         return this.permitSchemas.contains(name);
     }
+    
+    public boolean isPermitFunction(String name) {
+        name = WallVisitorUtils.form(name);
+        return this.permitFunctions.contains(name);
+    }
 }
diff --git a/src/main/java/com/alibaba/druid/filter/wall/WallVisitor.java b/src/main/java/com/alibaba/druid/filter/wall/WallVisitor.java
index 718fd228a4..035fb94ada 100644
--- a/src/main/java/com/alibaba/druid/filter/wall/WallVisitor.java
+++ b/src/main/java/com/alibaba/druid/filter/wall/WallVisitor.java
@@ -13,7 +13,5 @@ public interface WallVisitor extends SQLASTVisitor {
     
     boolean containsPermitTable(String name);
 
-    boolean containsPermitObjects(String name);
-
     String toSQL(SQLObject obj);
 }
diff --git a/src/main/java/com/alibaba/druid/filter/wall/spi/MySqlWallVisitor.java b/src/main/java/com/alibaba/druid/filter/wall/spi/MySqlWallVisitor.java
index 1589aa7e77..3679b89d6b 100644
--- a/src/main/java/com/alibaba/druid/filter/wall/spi/MySqlWallVisitor.java
+++ b/src/main/java/com/alibaba/druid/filter/wall/spi/MySqlWallVisitor.java
@@ -46,11 +46,6 @@ public class MySqlWallVisitor extends MySqlASTVisitorAdapter implements WallVisi
         return config;
     }
 
-    public boolean containsPermitObjects(String name) {
-        name = name.toLowerCase();
-        return config.getPermitObjects().contains(name);
-    }
-
     public List<Violation> getViolations() {
         return violations;
     }
@@ -205,7 +200,7 @@ public class MySqlWallVisitor extends MySqlASTVisitorAdapter implements WallVisi
         if (!config.isTableCheck()) {
             return false;
         }
-        
+
         name = WallVisitorUtils.form(name);
         return config.getPermitTables().contains(name);
     }
diff --git a/src/main/java/com/alibaba/druid/filter/wall/spi/OracleWallVisitor.java b/src/main/java/com/alibaba/druid/filter/wall/spi/OracleWallVisitor.java
index 3a01a747b7..88941430b3 100644
--- a/src/main/java/com/alibaba/druid/filter/wall/spi/OracleWallVisitor.java
+++ b/src/main/java/com/alibaba/druid/filter/wall/spi/OracleWallVisitor.java
@@ -158,11 +158,6 @@ public class OracleWallVisitor extends OracleASTVIsitorAdapter implements WallVi
         }
     }
 
-    @Override
-    public boolean containsPermitObjects(String name) {
-        return config.getPermitObjects().contains(name);
-    }
-
     @Override
     public boolean visit(SQLSelectStatement x) {
         if (!config.isSelelctAllow()) {
diff --git a/src/main/java/com/alibaba/druid/filter/wall/spi/WallVisitorUtils.java b/src/main/java/com/alibaba/druid/filter/wall/spi/WallVisitorUtils.java
index f8a9befa47..3b062c3064 100644
--- a/src/main/java/com/alibaba/druid/filter/wall/spi/WallVisitorUtils.java
+++ b/src/main/java/com/alibaba/druid/filter/wall/spi/WallVisitorUtils.java
@@ -47,7 +47,7 @@ public class WallVisitorUtils {
         if (x.getOwner() instanceof SQLIdentifierExpr) {
             String owner = x.getOwner().toString();
             owner = WallVisitorUtils.form(owner);
-            if (visitor.containsPermitObjects(owner)) {
+            if (visitor.getConfig().isPermitObjects(owner)) {
                 visitor.getViolations().add(new IllegalSQLObjectViolation(visitor.toSQL(x)));
             }
         }
@@ -391,7 +391,7 @@ public class WallVisitorUtils {
         if (x.getOwner() instanceof SQLIdentifierExpr) {
             String owner = x.getOwner().toString();
             owner = WallVisitorUtils.form(owner);
-            if (visitor.containsPermitObjects(owner)) {
+            if (visitor.getConfig().isPermitObjects(owner)) {
                 visitor.getViolations().add(new IllegalSQLObjectViolation(visitor.toSQL(x)));
             }
         }
@@ -402,7 +402,7 @@ public class WallVisitorUtils {
         
         String methodName = x.getMethodName();
 
-        if (visitor.getConfig().getPermitFunctions().contains(methodName.toLowerCase())) {
+        if (visitor.getConfig().isPermitFunction(methodName.toLowerCase())) {
             visitor.getViolations().add(new IllegalSQLObjectViolation(visitor.toSQL(x)));
         }