消息分类查询搜索sql优化

@@ -44,18 +44,21 @@
     <include refid="Base_Column_List" />
     from message_type
     <where>
+      <if test="name == null or name == ''">
+        parent_id = 0
+      </if>
       <if test="id != null and id != ''">
         and ID = #{id,jdbcType=VARCHAR}
       </if>
-      <if test="name != null and name != ''">
-       and  name = #{name,jdbcType=VARCHAR}
-      </if>
       <if test="type !=null  and type > 0">
         and type = #{type,jdbcType=INTEGER}
       </if>
       <if test="des != null and des != ''">
         and des like concat('%',#{des,jdbcType=VARCHAR},'%')
       </if>
+      <if test="name != null and name != ''">
+        and  name = #{name,jdbcType=VARCHAR}
+      </if>
     </where>
   </select>
   <delete id="deleteByPrimaryKey" parameterType="java.lang.String" >