bug fixed for issue 1249. https://github.com/alibaba/druid/issues/1249

src/main/java/com/alibaba/druid/sql/dialect/mysql/parser/MySqlLexer.java

@@ -335,8 +335,8 @@ public class MySqlLexer extends Lexer {
                 }
 
                 switch (ch) {
-                    case '\0':
-                        putChar(ch = '\0');
+                    case '0':
+                        putChar('\0');
                         break;
                     case '\'':
                         putChar('\'');

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

@@ -630,8 +630,26 @@ public class MySqlOutputVisitor extends SQLASTOutputVisitor implements MySqlASTV
         print('\'');
 
         String text = x.getText();
-        text = text.replaceAll("'", "''");
-        text = text.replace("\\", "\\\\");
+        
+        StringBuilder buf = new StringBuilder(text.length());
+        for (int i = 0; i < text.length(); ++i) {
+            char ch = text.charAt(i);
+            if (ch == '\'') {
+                buf.append('\'');
+                buf.append('\'');
+            } else if (ch == '\\') {
+                buf.append('\\');
+                buf.append('\\');
+            } else if (ch == '\0') {
+                buf.append('\\');
+                buf.append('0');
+            } else {
+                buf.append(ch);
+            }
+        }
+        if (buf.length() != text.length()) {
+            text = buf.toString();
+        }
 
         print0(text);
 

src/test/java/com/alibaba/druid/bvt/sql/mysql/MySqlInsertTest_12.java

@@ -0,0 +1,55 @@
+/*
+ * 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.sql.mysql;
+
+import java.util.List;
+
+import org.junit.Assert;
+
+import com.alibaba.druid.sql.MysqlTest;
+import com.alibaba.druid.sql.SQLUtils;
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlInsertStatement;
+import com.alibaba.druid.sql.dialect.mysql.parser.MySqlStatementParser;
+import com.alibaba.druid.sql.dialect.mysql.visitor.MySqlSchemaStatVisitor;
+
+public class MySqlInsertTest_12 extends MysqlTest {
+
+    public void test_insert_rollback_on_fail() throws Exception {
+        String sql = "insert into t1 values('A\\0\\0\\0B')";
+
+        MySqlStatementParser parser = new MySqlStatementParser(sql);
+        parser.setParseCompleteValues(false);
+        parser.setParseValuesSize(3);
+        List<SQLStatement> statementList = parser.parseStatementList();
+        SQLStatement stmt = statementList.get(0);
+
+        MySqlInsertStatement insertStmt = (MySqlInsertStatement) stmt;
+
+        Assert.assertEquals(1, insertStmt.getValuesList().size());
+        Assert.assertEquals(1, insertStmt.getValues().getValues().size());
+        Assert.assertEquals(0, insertStmt.getColumns().size());
+        Assert.assertEquals(1, statementList.size());
+
+        MySqlSchemaStatVisitor visitor = new MySqlSchemaStatVisitor();
+        stmt.accept(visitor);
+
+        String formatSql = "INSERT INTO t1"
+                + "\nVALUES ('A\\0\\0\\0B')";
+        Assert.assertEquals(formatSql, SQLUtils.toMySqlString(insertStmt));
+    }
+
+}