myBatis针对不同数据库的模糊查询

<if test="name != null and name != ''">
   AND a.name LIKE 
	<if test="dbName == 'oracle'">'%'||#{name}||'%'</if>
	<if test="dbName == 'mssql'">'%'+#{name}+'%'</if>
	<if test="dbName == 'mysql'">concat('%',#{name},'%')</if>
</if>

遇到分类树结构，删除时如果有下级，则将下级也删除

<update id="delete">
	DELETE FROM dm_model_type
	WHERE id = #{id} OR parent_ids LIKE '%,'||#{id}||',%'
</update>