sql wall support block statement.

src/main/java/com/alibaba/druid/wall/WallConfig.java

@@ -45,6 +45,7 @@ public class WallConfig implements WallConfigMBean {
     private boolean             hintAllow                   = true;
     private boolean             lockTableAllow              = true;
     private boolean             startTransactionAllow       = true;
+    private boolean             blockAllow                  = true;
 
     private boolean             conditionAndAlwayTrueAllow  = false;
     private boolean             conditionAndAlwayFalseAllow = false;
@@ -789,6 +790,14 @@ public class WallConfig implements WallConfigMBean {
         this.insertValuesCheckSize = insertValuesCheckSize;
     }
 
+    public boolean isBlockAllow() {
+        return blockAllow;
+    }
+
+    public void setBlockAllow(boolean blockAllow) {
+        this.blockAllow = blockAllow;
+    }
+
     public void configFromProperties(Properties properties) {
         {
             String propertyValue = properties.getProperty("druid.wall.tenantColumn");

src/main/java/com/alibaba/druid/wall/spi/WallVisitorUtils.java

@@ -2455,6 +2455,10 @@ public class WallVisitorUtils {
             allow = config.isStartTransactionAllow();
             denyMessage = "start transaction not allow";
             errorCode = ErrorCode.START_TRANSACTION_NOT_ALLOW;
+        } else if (x instanceof SQLBlockStatement) {
+            allow = config.isBlockAllow();
+            denyMessage = "block statement not allow";
+            errorCode = ErrorCode.BLOCK_NOT_ALLOW;
         } else {
             allow = config.isNoneBaseStatementAllow();
             errorCode = ErrorCode.NONE_BASE_STATEMENT_NOT_ALLOW;

src/main/java/com/alibaba/druid/wall/violation/ErrorCode.java

@@ -34,6 +34,7 @@ public interface ErrorCode {
     public final static int COMMIT_NOT_ALLOW              = 1301;
     public final static int ROLLBACK_NOT_ALLOW            = 1302;
     public final static int START_TRANSACTION_NOT_ALLOW   = 1303;
+    public final static int BLOCK_NOT_ALLOW               = 1304;
 
     public final static int SET_NOT_ALLOW                 = 1200;
     public final static int DESC_NOT_ALLOW                = 1201;

src/test/java/com/alibaba/druid/bvt/filter/wall/oracle/OracleWallTest7.java

@@ -0,0 +1,30 @@
+/*
+ * Copyright 1999-2101 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.filter.wall.oracle;
+
+import com.alibaba.druid.wall.WallUtils;
+import junit.framework.TestCase;
+import org.junit.Assert;
+
+public class OracleWallTest7 extends TestCase {
+
+    public void test_true() throws Exception {
+        String sql = //
+        "begin\n"
+                + "end";
+        Assert.assertTrue(WallUtils.isValidateOracle(sql));
+    }
+}