improve MySqlParameterizedOutputVisitor

src/main/java/com/alibaba/druid/sql/dialect/mysql/visitor/MySqlParameterizedOutputVisitor.java

@@ -31,6 +31,7 @@ import com.alibaba.druid.sql.ast.expr.SQLNumberExpr;
 import com.alibaba.druid.sql.ast.expr.SQLPropertyExpr;
 import com.alibaba.druid.sql.ast.statement.SQLExprTableSource;
 import com.alibaba.druid.sql.ast.statement.SQLInsertStatement.ValuesClause;
+import com.alibaba.druid.sql.dialect.mysql.ast.expr.MySqlCharExpr;
 import com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlInsertStatement;
 import com.alibaba.druid.sql.visitor.ParameterizedOutputVisitorUtils;
 import com.alibaba.druid.sql.visitor.ParameterizedVisitor;
@@ -179,6 +180,14 @@ public class MySqlParameterizedOutputVisitor extends MySqlOutputVisitor implemen
 
         return ParameterizedOutputVisitorUtils.visit(this, x);
     }
+    
+    public boolean visit(MySqlCharExpr x) {
+        if (!ParameterizedOutputVisitorUtils.checkParameterize(x)) {
+            return super.visit(x);
+        }
+
+        return ParameterizedOutputVisitorUtils.visit(this, x);
+    }
 
     protected void printValuesList(MySqlInsertStatement x) {
         List<ValuesClause> valuesList = x.getValuesList();

src/test/java/com/alibaba/druid/bvt/sql/mysql/visitor/MySqlParameterizedOutputVisitorTest.java

@@ -0,0 +1,31 @@
+/*
+ * 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.visitor;
+
+import junit.framework.TestCase;
+
+import com.alibaba.druid.sql.visitor.ParameterizedOutputVisitorUtils;
+
+public class MySqlParameterizedOutputVisitorTest extends TestCase {
+
+    public void test_0() throws Exception {
+        String sql = "SELECT appsheetserialno FROM app_trans WHERE nodeid = _gbk '619' "
+                     + " AND alino = _gbk '2013110900031031001700thfund00163619'"
+                     + " AND apserialno = _gbk '201405120002300002170013205458'";
+        System.out.println(ParameterizedOutputVisitorUtils.parameterize(sql, "mysql"));
+    }
+
+}