mybatis的mapping.xml中or的使用

<delete id="deleteObjects">
       delete from sys_logs
       <choose>
         <when test="ids!=null and ids.length>0">
           <where>
              <foreach collection="ids"
                        item="id" separator="or">
                  id=#{id}
              </foreach>
           </where>
         </when>
         <otherwise>
          where id=-1
         </otherwise>
       </choose>
    </delete>

or的效率比in高一些