mybatis坑之数字字符串比对原

SELECT
        a.tag_name,
        a.tag_id,
        count( 0 ) AS base_total
        FROM
       mm_dd_body a
        <if test="tagType!=null and tagType == '0'">
            LEFT JOIN ccc AS b ON b.tag_body_id = a.id
        </if>
        <if test="tagType!=null and tagType == '1'">
            <![CDATA[
        left join `vvvv` `b` on CONVERT ( concat( '-', `b`.`mark_rule_key` ) USING utf8mb4 ) REGEXP concat( '(\\(|[[:blank:]]+|-){1,}', `a`.`column_name`, '(>|<|>=|<=|=|[[:blank:]])+' )
        AND b.tag_id IN ( SELECT tag_id FROM gggg WHERE product = a.product )
        ]]>
        </if>
        WHERE
        a.tag_base_cat = #{tagType}
        AND a.del = 0

 <if test="tagType!=null and tagType == 0 ">
            LEFT JOIN ccc AS b ON b.tag_body_id = a.id
        </if>

    <if test="tagType!=null and tagType == '0'.toString()">
            LEFT JOIN ccc AS b ON b.tag_body_id = a.id
        </if>