问题描述

应用在使用 sharding sphere 来实现加密后，对于 like sql 语句解析抛异常，异常信息如下：

sharding sphere 版本 5.3.2

xml 文件SQL 语句：

<select id="countSchoolByStatus" parameterType="java.lang.Integer" resultType="int">
        select
        count(id)
        from school
        <where>
            <if test="status != null">
                and `status` = #{status, jdbcType=INTEGER}
            </if>
            <if test="name != null">
                and `name` like '%' #{status, jdbcType=INTEGER} '%'
            </if>
        </where>
    </select>

Caused by: org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.executor.ExecutorException: Error preparing statement.  Cause: org.apache.shardingsphere.sql.parser.exception.SQLParsingException: You have an error in your SQL syntax: select
        count(id)
        from school
         WHERE  `status` = ?
            
            
                and `name` like '%' ? '%', no viable alternative at input '?' at line 7, position 36, near [@15,136:136='?',<42>,7:36]
	at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:77) ~[mybatis-spring-1.3.2.jar:1.3.2]
	at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:446) ~[mybatis-spring-1.3.2.jar:1.3.2]
	at com.sun.proxy.$Proxy59.selectOne(Unknown Source) ~[na:na]
	at org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:166) ~[mybatis-spring-1.3.2.jar:1.3.2]

解决方案

修改 like % % 的写法，改为 like concat()

<select id="countSchoolByStatus" parameterType="java.lang.Integer" resultType="int">
        select
        count(id)
        from school
        <where>
            <if test="status != null">
                and `status` = #{status, jdbcType=INTEGER}
            </if>
            <if test="name != null">
                and `name` like concat('%', #{status, jdbcType=INTEGER}, '%')
            </if>
        </where>
    </select>