利用WITH AS 优化FILTER
SQL> explain plan for select *
from fxqd_list_20131115_new
where (acct_no, oper_no, seqno, trans_amt) not in
(select acct_no, oper_no, seqno, trans_amt
from fxqd_list
where reg_date = to_date('20131115', 'yyyymmdd'))
and list_type = '1'; 2 3 4 5 6 7 Explained. SQL> select * from table(dbms_xplan.display()); PLAN_TABLE_OUTPUT
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Plan hash value: 196590019 -------------------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
-------------------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 4145 | 10M| 13079 (1)| 00:02:37 |
|* 1 | FILTER | | | | | |
|* 2 | TABLE ACCESS FULL | FXQD_LIST_20131115_NEW | 4145 | 10M| 180 (2)| 00:00:03 |
|* 3 | TABLE ACCESS BY INDEX ROWID| FXQD_LIST | 2036 | 157K| 4 (0)| 00:00:01 |
|* 4 | INDEX RANGE SCAN | FXQD_LIST_IDX_1 | 2500 | | 3 (0)| 00:00:01 |
------------------------------------------------------------------------------------------------------- Predicate Information (identified by operation id):
--------------------------------------------------- 1 - filter( NOT EXISTS (SELECT /*+ */ 0 FROM "FXQD_LIST" "FXQD_LIST" WHERE
"REG_DATE"=TO_DATE(' 2013-11-15 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND LNNVL("ACCT_NO"<>:B1)
AND LNNVL("OPER_NO"<>:B2) AND LNNVL("SEQNO"<>:B3) AND LNNVL("TRANS_AMT"<>:B4)))
2 - filter("LIST_TYPE"='1')
3 - filter(LNNVL("ACCT_NO"<>:B1) AND LNNVL("OPER_NO"<>:B2) AND LNNVL("SEQNO"<>:B3) AND
LNNVL("TRANS_AMT"<>:B4))
4 - access("REG_DATE"=TO_DATE(' 2013-11-15 00:00:00', 'syyyy-mm-dd hh24:mi:ss')) Note
-----
- dynamic sampling used for this statement 26 rows selected. 查看特殊执行计划:
SQL> select * from table(dbms_xplan.display_cursor(null,null,'allstats last')); PLAN_TABLE_OUTPUT
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
SQL_ID fg7h5y1451z61, child number 0
-------------------------------------
select * from fxqd_list_20131115_new where (acct_no, oper_no, seqno, trans_amt) not in (select acct_no,
oper_no, seqno, trans_amt from fxqd_list where reg_date = to_date('20131115', 'yyyymmdd'))
and list_type = '1' Plan hash value: 196590019 --------------------------------------------------------------------------------------------------------------------------
| Id | Operation | Name | Starts | E-Rows | A-Rows | A-Time | Buffers | Reads |
--------------------------------------------------------------------------------------------------------------------------
|* 1 | FILTER | | 1 | | 103 |00:00:32.10 | 1563K| 225 |
|* 2 | TABLE ACCESS FULL | FXQD_LIST_20131115_NEW | 1 | 4145 | 4159 |00:00:00.13 | 795 | 225 |
|* 3 | TABLE ACCESS BY INDEX ROWID| FXQD_LIST | 4159 | 2036 | 4056 |00:00:31.95 | 1562K| 0 |
|* 4 | INDEX RANGE SCAN | FXQD_LIST_IDX_1 | 4159 | 2500 | 14M|00:00:03.55 | 67954 | 0 |
-------------------------------------------------------------------------------------------------------------------------- Predicate Information (identified by operation id):
--------------------------------------------------- 1 - filter( IS NULL)
2 - filter("LIST_TYPE"='1')
3 - filter((LNNVL("ACCT_NO"<>:B1) AND LNNVL("OPER_NO"<>:B2) AND LNNVL("SEQNO"<>:B3) AND
LNNVL("TRANS_AMT"<>:B4)))
4 - access("REG_DATE"=TO_DATE(' 2013-11-15 00:00:00', 'syyyy-mm-dd hh24:mi:ss')) Note
-----
- dynamic sampling used for this statement 30 rows selected. 利用with as 改写:
SQL> with D as (select /*+ materialize*/ acct_no, oper_no, seqno, trans_amt
from fxqd_list
where reg_date = to_date('20131115', 'yyyymmdd'))
select * from fxqd_list_20131115_new where (acct_no, oper_no, seqno, trans_amt) not in
(select acct_no, oper_no, seqno, trans_amt from D)
and list_type = '1'; 2 3 4 5 6 103 rows selected. Execution Plan
----------------------------------------------------------
Plan hash value: 2773456887 -------------------------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
-------------------------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 4145 | 10M| 26570 (1)| 00:05:19 |
| 1 | TEMP TABLE TRANSFORMATION | | | | | |
| 2 | LOAD AS SELECT | FXQD_LIST_20131115_NEW | | | | |
| 3 | TABLE ACCESS BY INDEX ROWID| FXQD_LIST | 2500 | 192K| 389 (1)| 00:00:05 |
|* 4 | INDEX RANGE SCAN | FXQD_LIST_IDX_1 | 2500 | | 10 (0)| 00:00:01 |
|* 5 | FILTER | | | | | |
|* 6 | TABLE ACCESS FULL | FXQD_LIST_20131115_NEW | 4145 | 10M| 180 (2)| 00:00:03 |
|* 7 | VIEW | | 2500 | 170K| 8 (0)| 00:00:01 |
| 8 | TABLE ACCESS FULL | SYS_TEMP_0FD9D66DA_A4F53A1D | 2500 | 170K| 8 (0)| 00:00:01 |
------------------------------------------------------------------------------------------------------------- Predicate Information (identified by operation id):
--------------------------------------------------- 4 - access("REG_DATE"=TO_DATE(' 2013-11-15 00:00:00', 'syyyy-mm-dd hh24:mi:ss'))
5 - filter( NOT EXISTS (SELECT /*+ */ 0 FROM (SELECT /*+ CACHE_TEMP_TABLE ("T1") */ "C0"
"ACCT_NO","C1" "OPER_NO","C2" "SEQNO","C3" "TRANS_AMT" FROM "SYS"."SYS_TEMP_0FD9D66DA_A4F53A1D"
"T1") "D" WHERE LNNVL("ACCT_NO"<>:B1) AND LNNVL("OPER_NO"<>:B2) AND LNNVL("SEQNO"<>:B3) AND
LNNVL("TRANS_AMT"<>:B4)))
6 - filter("LIST_TYPE"='1')
7 - filter(LNNVL("ACCT_NO"<>:B1) AND LNNVL("OPER_NO"<>:B2) AND LNNVL("SEQNO"<>:B3) AND
LNNVL("TRANS_AMT"<>:B4)) Note
-----
- dynamic sampling used for this statement Statistics
----------------------------------------------------------
171 recursive calls
64 db block gets
123638 consistent gets
55 physical reads
1556 redo size
43694 bytes sent via SQL*Net to client
558 bytes received via SQL*Net from client
8 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
103 rows processed 如果不加/*+ materialize*/ hints呢？
SQL> with D as (select acct_no, oper_no, seqno, trans_amt
from fxqd_list
where reg_date = to_date('20131115', 'yyyymmdd'))
select * from fxqd_list_20131115_new where (acct_no, oper_no, seqno, trans_amt) not in
(select acct_no, oper_no, seqno, trans_amt from D)
and list_type = '1'; 2 3 4 5 6 103 rows selected. Execution Plan
----------------------------------------------------------
Plan hash value: 196590019 -------------------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
-------------------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 4145 | 10M| 13079 (1)| 00:02:37 |
|* 1 | FILTER | | | | | |
|* 2 | TABLE ACCESS FULL | FXQD_LIST_20131115_NEW | 4145 | 10M| 180 (2)| 00:00:03 |
|* 3 | TABLE ACCESS BY INDEX ROWID| FXQD_LIST | 2036 | 157K| 4 (0)| 00:00:01 |
|* 4 | INDEX RANGE SCAN | FXQD_LIST_IDX_1 | 2500 | | 3 (0)| 00:00:01 |
------------------------------------------------------------------------------------------------------- Predicate Information (identified by operation id):
--------------------------------------------------- 1 - filter( NOT EXISTS (SELECT /*+ */ 0 FROM "FXQD_LIST" "FXQD_LIST" WHERE
"REG_DATE"=TO_DATE(' 2013-11-15 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND LNNVL("ACCT_NO"<>:B1)
AND LNNVL("OPER_NO"<>:B2) AND LNNVL("SEQNO"<>:B3) AND LNNVL("TRANS_AMT"<>:B4)))
2 - filter("LIST_TYPE"='1')
3 - filter(LNNVL("ACCT_NO"<>:B1) AND LNNVL("OPER_NO"<>:B2) AND LNNVL("SEQNO"<>:B3) AND
LNNVL("TRANS_AMT"<>:B4))
4 - access("REG_DATE"=TO_DATE(' 2013-11-15 00:00:00', 'syyyy-mm-dd hh24:mi:ss')) Note
-----
- dynamic sampling used for this statement Statistics
----------------------------------------------------------
19 recursive calls
0 db block gets
1564063 consistent gets
0 physical reads
0 redo size
43694 bytes sent via SQL*Net to client
558 bytes received via SQL*Net from client
8 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
103 rows processed
利用WITH AS 优化FILTER的更多相关文章
- 利用函数索引优化<>
SQL> select count(*),ID from test_2 group by id; COUNT(*) ID ---------- ---------- 131072 1 11796 ...
- 【阿里云产品公测】利用PTS服务优化网站数据库读写性能
[阿里云产品公测]利用PTS服务优化网站数据库读写性能 作者:阿里云用户千鸟 写这个帖子主要也是因为在用PTS测试网站的时候,手动访问网站进入报错页面,主要原因是数据库连接对象存在问题,导致并发多的时 ...
- 看了一本书，说可以利用Hierarchy Viewer优化布局
看了一本书,说可以利用Hierarchy Viewer优化布局,今以志之. 参考:http://www.cnblogs.com/Rocky_/archive/2011/11/04/2236243.ht ...
- 产品设计教程：利用“系列位置效应”优化UI
任何博得人们喜欢的产品都在一定程度上契合了用户的心理需求.设计和心理学息息相关,掌握一些基本心理学知识,设计师的作品更能在潜意识中抓住用户的心. 系列位置效应 “系列位置效应”(The Serial ...
- Web Api 内部数据思考 和 利用http缓存优化 Api
在上篇<Web Api 端点设计 与 Oauth>后,接着我们思考Web Api 的内部数据: 其他文章:<API接口安全加强设计方法> 第一 实际使用应该返回怎样的数据 ? ...
- 利用Cayley-Hamilton theorem 优化矩阵线性递推
平时有关线性递推的题,很多都可以利用矩阵乘法来解决. 时间复杂度一般是O(K3logn)因此对矩阵的规模限制比较大. 下面介绍一种利用利用Cayley-Hamilton theorem加速矩阵乘法的方 ...
- SQL Server 利用锁提示优化Row_number()-程序员需知
网站中一些老页面仍采用Row_number类似的开窗函数进行分页处理,此时如果遭遇挖坟帖的情形可能就需要漫长的等待且消耗巨大.这里给大家介绍根据Row_number()特性采用特定锁Hint提升查询速 ...
- Android（java）学习笔记206：利用开源SmartImageView优化网易新闻RSS客户端
1.我们自己编写的SmartImageView会有很多漏洞,但是我们幸运的可以在网上利用开源项目的,开源项目中有很多成熟的代码,比如SmartImageView都编写的很成熟的 国内我们经常用到htt ...
- Android（java）学习笔记149：利用开源SmartImageView优化网易新闻RSS客户端
1.我们自己编写的SmartImageView会有很多漏洞,但是我们幸运的可以在网上利用开源项目的,开源项目中有很多成熟的代码,比如SmartImageView都编写的很成熟的 国内我们经常用到htt ...
随机推荐
- spring使用aop
基于spring-framework-4.1.7使用aop >>>>>>>>>>>>>>>>>&g ...
- 逻辑回归应用之Kaggle泰坦尼克之灾(转）
正文:14pt 代码:15px 1 初探数据 先看看我们的数据,长什么样吧.在Data下我们train.csv和test.csv两个文件,分别存着官方给的训练和测试数据. import pandas ...
- Java-struts2 之值栈问题
这里是根据一个小项目,将数据库的值查出来,然后在页面前台进行遍历的方法 放入值的几种方式: Struts2的三种存值取值的方式 值栈: 栈上下文: ActionContext: package com ...
- C# Ref 与out 的区别
在C#中,有四种传递参数方式: 1. 传值 (value) : 无额外修饰符 2. 传址(reference) : 需修饰符Ref,传入函数的参数必须先赋值 3. 输出参数(output): 需修饰符 ...
- 关于基于.net的WEB程序开发所需要的一些技术归纳
前提: 最近公司里有一个同事,年龄比我大几岁,但是由于是转行来做开发的,许多的关于.net开发技术不是很入行,所以总是会问我一些东西,基于自己以前的一些 经验,总是会愿意给他讲一些总结性的东西,希望他 ...
- [转]看看国外的javascript题目,你能全部做对吗?
叶小钗 的博客最近都在讨论面试题目 正好以前也看过一篇,就借花献佛拿出来分享一下 http://perfectionkills.com/javascript-quiz/ 附带了自己的理解,答案有争议的 ...
- SSH整合笔记
SSH:spring+struts+hibernate. 一:所需jar: 需要注意的是: hibernate+spring需要Spring-orm-xxx.jar struts+spring需要st ...
- C++单元测试2
这里再对上一篇<C++单元测试>进行技巧补充. 我们知道对动态链接库(lib和dll)的测试是比较简单的,我这里主要对需要注意的地方说明一下. 1.建议单独创建单元测试解决方案(不是创建项 ...
- 对象序列化XML
/// <summary>/// 对象序列化XML/// </summary>/// <param name="type">类型</par ...
- Php会员权限
<?phpecho $uu=@array_sum(@$_POST['gr']);?><form action="" method="POST" ...