img
img
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既有适合小白学习的零基础资料,也有适合3年以上经验的小伙伴深入学习提升的进阶课程,涵盖了95%以上软件测试知识点,真正体系化!

由于文件比较多,这里只是将部分目录截图出来,全套包含大厂面经、学习笔记、源码讲义、实战项目、大纲路线、讲解视频,并且后续会持续更新

需要这份系统化的资料的朋友,可以戳这里获取

david=# select pg\_size\_pretty(pg\_database\_size('david'));
 pg_size_pretty 
----------------
MB
(1 row)

索引

创建索引

CREATE INDEX idx_key_eng_search_status
  ON base.keyword_engine
  USING btree
  (search_status);

3.4 查看单索引大小

david=# select pg\_relation\_size('idx\_test');
 pg_relation_size 
------------------
(1 row)

david=# select pg\_size\_pretty(pg\_relation\_size('idx\_test'));
 pg_size_pretty 
----------------
MB
(1 row)

david=# select pg\_size\_pretty(pg\_relation\_size('idx\_join\_date\_test'));
 pg_size_pretty 
----------------
MB
(1 row)

3.5 查看指定表中所有索引大小

david=# select pg\_indexes\_size('test');                  
 pg_indexes_size 
-----------------
(1 row)

david=# select pg\_size\_pretty(pg\_indexes\_size('test'));
 pg_size_pretty 
----------------
MB
(1 row)

idx_test 和idx_join_date_test 两个索引大小加起来差不多等于上面pg_indexes_size() 查询出来的索引大小。

3.6 查看指定schema 里所有的索引大小,按从大到小的顺序排列。

david=# select \* from pg_namespace;
      nspname       | nspowner |               nspacl                
--------------------+----------+-------------------------------------
 pg_toast           |       10 | 
 pg_temp_1          |       10 | 
 pg_toast_temp_1    |       10 | 
 pg_catalog         |       10 | {postgres=UC/postgres,=U/postgres}
 information_schema |       10 | {postgres=UC/postgres,=U/postgres}
 public             |       10 | {postgres=UC/postgres,=UC/postgres}
(6 rows)

david=# select indexrelname, pg\_size\_pretty(pg\_relation\_size(relid)) from pg_stat_user_indexes where schemaname='public' order by pg\_relation\_size(relid) desc;
         indexrelname          | pg_size_pretty 
-------------------------------+----------------
 idx_join_date_test            | 91 MB
 idx_test                      | 91 MB
 testtable_idx                 | 1424 kB
 city_pkey                     | 256 kB
 city11                        | 256 kB
 countrylanguage_pkey          | 56 kB
 sale_pkey                     | 8192 bytes
 track_pkey                    | 8192 bytes
 tbl_partition_201211_joindate | 8192 bytes
 tbl_partition_201212_joindate | 8192 bytes
 tbl_partition_201301_joindate | 8192 bytes
 tbl_partition_201302_joindate | 8192 bytes
 tbl_partition_201303_joindate | 8192 bytes
 customer_pkey                 | 8192 bytes
 album_pkey                    | 8192 bytes
 item_pkey                     | 8192 bytes
 tbl_partition_201304_joindate | 8192 bytes
 tbl_partition_201307_joindate | 8192 bytes
 tbl_partition_201305_joindate | 0 bytes
 tbl_partition_201306_joindate | 0 bytes
(20 rows)

查看索引大小

select indexrelname, pg_size_pretty(pg_relation_size(relid)) from pg_stat_user_indexes where schemaname='public' order by pg_relation_size(relid) desc;

3.7 查看指定表大小

david=# select pg\_relation\_size('test');                
 pg_relation_size 
------------------
(1 row)

david=# select pg\_size\_pretty(pg\_relation\_size('test'));
 pg_size_pretty 
----------------
MB
(1 row)

使用pg_table_size() 函数查看

david=# select pg\_table\_size('test');                   
 pg_table_size 
---------------
(1 row)

david=# select pg\_size\_pretty(pg\_table\_size('test'));   
 pg_size_pretty 
----------------
MB
(1 row)

3.8 查看指定表的总大小

david=# select pg\_total\_relation\_size('test');       
 pg_total_relation_size 
------------------------
(1 row)

david=# select pg\_size\_pretty(pg\_total\_relation\_size('test'));
 pg_size_pretty 
----------------
MB
(1 row)

3.9 查看指定schema 里所有的表大小,按从大到小的顺序排列。

david=# select \* from pg_namespace;
      nspname       | nspowner |               nspacl                
--------------------+----------+-------------------------------------
 pg_toast           |       10 | 
 pg_temp_1          |       10 | 
 pg_toast_temp_1    |       10 | 
 pg_catalog         |       10 | {postgres=UC/postgres,=U/postgres}
 information_schema |       10 | {postgres=UC/postgres,=U/postgres}
 public             |       10 | {postgres=UC/postgres,=UC/postgres}
(6 rows)

david=# select indexrelname, pg\_size\_pretty(pg\_relation\_size(relid)) from pg_stat_user_indexes where schemaname='public' order by pg\_relation\_size(relid) desc;
         indexrelname          | pg_size_pretty 
-------------------------------+----------------
 idx_join_date_test            | 91 MB
 idx_test                      | 91 MB
 testtable_idx                 | 1424 kB
 city_pkey                     | 256 kB
 city11                        | 256 kB
 countrylanguage_pkey          | 56 kB
 sale_pkey                     | 8192 bytes
 track_pkey                    | 8192 bytes
 tbl_partition_201211_joindate | 8192 bytes
 tbl_partition_201212_joindate | 8192 bytes
 tbl_partition_201301_joindate | 8192 bytes
 tbl_partition_201302_joindate | 8192 bytes
 tbl_partition_201303_joindate | 8192 bytes
 customer_pkey                 | 8192 bytes
 album_pkey                    | 8192 bytes
 item_pkey                     | 8192 bytes
 tbl_partition_201304_joindate | 8192 bytes
 tbl_partition_201307_joindate | 8192 bytes
 tbl_partition_201305_joindate | 0 bytes
 tbl_partition_201306_joindate | 0 bytes
(20 rows)

3.7 查看指定表大小

david=# select pg\_relation\_size('test');                
 pg_relation_size 
------------------
(1 row)

david=# select pg\_size\_pretty(pg\_relation\_size('test'));
 pg_size_pretty 
----------------
MB
(1 row)

使用pg_table_size() 函数查看

david=# select pg\_table\_size('test');                   
 pg_table_size 
---------------
(1 row)

david=# select pg\_size\_pretty(pg\_table\_size('test'));   
 pg_size_pretty 
----------------
MB
(1 row)

3.8 查看指定表的总大小

david=# select pg\_total\_relation\_size('test');       
 pg_total_relation_size 
------------------------
(1 row)

david=# select pg\_size\_pretty(pg\_total\_relation\_size('test'));
 pg_size_pretty 
----------------
MB
(1 row)

3.9 查看指定schema 里所有的表大小,按从大到小的顺序排列。

david=# select relname, pg\_size\_pretty(pg\_relation\_size(relid)) from pg_stat_user_tables where schemaname='public' order by pg\_relation\_size(relid) desc;
            relname            | pg_size_pretty 
-------------------------------+----------------
 test                          | 91 MB
 testtable                     | 1424 kB
 city                          | 256 kB
 countrylanguage               | 56 kB
 country                       | 40 kB
 testcount                     | 8192 bytes
 tbl_partition_201302          | 8192 bytes
 tbl_partition_201303          | 8192 bytes
 person                        | 8192 bytes
 customer                      | 8192 bytes
 american_state                | 8192 bytes
 tbl_david                     | 8192 bytes
 emp                           | 8192 bytes
 tbl_partition_201212          | 8192 bytes
 tbl_partition_201304          | 8192 bytes
 tbl_partition_error_join_date | 8192 bytes
 tbl_partition_201211          | 8192 bytes
 album                         | 8192 bytes
 tbl_partition_201307          | 8192 bytes
 tbl_xulie                     | 8192 bytes
 tbl_partition_201301          | 8192 bytes
 sale                          | 8192 bytes
 item                          | 8192 bytes
 track                         | 8192 bytes
 tbl_partition_201306          | 0 bytes
 tbl_partition                 | 0 bytes
 tbl_partition_201305          | 0 bytes
 person2                       | 0 bytes
(28 rows)

3.10 查看表空间大小

david=# select spcname from pg_tablespace;
  spcname   
------------
 pg_default
 pg_global
(2 rows)

david=# select pg\_tablespace\_size('pg\_default');                
 pg_tablespace_size 
--------------------
(1 row)

david=# select pg\_size\_pretty(pg\_tablespace\_size('pg\_default'));
 pg_size_pretty 
----------------
GB
(1 row)

另一种查看方法:

david=# select pg\_tablespace\_size('pg\_default')/1024/1024 as "SIZE M";     
 SIZE M 
--------
(1 row)

david=# select pg\_tablespace\_size('pg\_default')/1024/1024/1024 as "SIZE G"; 
 SIZE G 
--------
(1 row)

四、模式授权

增加
增加foo用户对该数据库public模式下所有表的select权限

test=# grant select on all tables in schema public to foo ;

增加foo用户对该数据库public模式下所有函数的执行权限

test=# grant execute on all functions in schema public to foo ;

增加foo用户对该数据库某个表的权限,权限可以一个或多个

test=# grant select,insert,update,delete on public.test to foo ;

增加foo用户对该数据库某个模式的权限,权限有all,create,usage 。

test=# grant all on schema public to foo ;

删除
删除foo用户对该数据库test表的select权限



![img](https://img-blog.csdnimg.cn/img_convert/04fbe955d620762be44f489609f45228.png)
![img](https://img-blog.csdnimg.cn/img_convert/a688d911b5945dc2aac4c53b15e8f26d.png)
![img](https://img-blog.csdnimg.cn/img_convert/cc7106a5893dee8c8dfc30bdeaead5c4.png)

**既有适合小白学习的零基础资料,也有适合3年以上经验的小伙伴深入学习提升的进阶课程,涵盖了95%以上软件测试知识点,真正体系化!**

**由于文件比较多,这里只是将部分目录截图出来,全套包含大厂面经、学习笔记、源码讲义、实战项目、大纲路线、讲解视频,并且后续会持续更新**

**[需要这份系统化的资料的朋友,可以戳这里获取](https://bbs.csdn.net/topics/618631832)**

 schema public to foo ;

删除
删除foo用户对该数据库test表的select权限



[外链图片转存中...(img-4X11fEDM-1715815065547)]
[外链图片转存中...(img-OjOedOgo-1715815065548)]
[外链图片转存中...(img-6BwULDvN-1715815065548)]

**既有适合小白学习的零基础资料,也有适合3年以上经验的小伙伴深入学习提升的进阶课程,涵盖了95%以上软件测试知识点,真正体系化!**

**由于文件比较多,这里只是将部分目录截图出来,全套包含大厂面经、学习笔记、源码讲义、实战项目、大纲路线、讲解视频,并且后续会持续更新**

**[需要这份系统化的资料的朋友,可以戳这里获取](https://bbs.csdn.net/topics/618631832)**

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