本篇内容主要讲解“Oracle与PostgreSQL拆分分区有什么不同”，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习“Oracle与PostgreSQL拆分分区有什么不同”吧!
直至12版本,PostgreSQL仍没有提供直接拆分分区的功能,暂时只能通过detach&attach实现,相对于Oracle的split支持,PG显得比较的simple&naive.
PG 12
[pg12@localhost ~]$ psql -d testdb
Timing is on.
Expanded display is used automatically.
psql (12beta1)
Type "help" for help.
[local]:5432 pg12@testdb=# drop table t_p1;
) to (200);
create table t_p1_maxvalue partition of t_p1 for values from (200) to (maxvalue);
truncate table t_p1;
insert into t_p1(id,c1) values(1,1);
insert into t_p1(id,c1) values(2,100);
insert into t_p1(id,c1) values(3,125);
insert into t_p1(id,c1) values(4,200);
insert into t_p1(id,c1) values(5,250);
insert into t_p1(id,c1) values(6,300);
insert into t_p1(id,c1) values(7,350);
insert into t_p1(id,c1) values(8,4500);
alter table t_p1 detach partition t_p1_maxvalue;
create table t_p1_3 partition of t_ERROR: table "t_p1" does not exist
Time: 8.497 ms
[local]:5432 pg12@testdb=# create table t_p1 (id int, c1 int) partition by range (c1);
p1 for values from (200) to (300);
insert into t_p1_3 select * from t_p1_maxvalue where c1 >= 200 and c1 < 300;
delete from t_p1_maxvalue where c1 >= 200 and c1 < 300;
alter table t_p1 attach partition t_p1_maxvalue for values from (300) to (maxvalue);CREATE TABLE
Time: 235.099 ms
[local]:5432 pg12@testdb=# create table t_p1_default partition of t_p1 default;
CREATE TABLE
Time: 11.941 ms
[local]:5432 pg12@testdb=# create table t_p1_1 partition of t_p1 for values from (1) to (100);
CREATE TABLE
Time: 15.247 ms
[local]:5432 pg12@testdb=# create table t_p1_2 partition of t_p1 for values from (100) to (200);
CREATE TABLE
Time: 1.705 ms
[local]:5432 pg12@testdb=# create table t_p1_maxvalue partition of t_p1 for values from (200) to (maxvalue);
CREATE TABLE
Time: 1.842 ms
[local]:5432 pg12@testdb=#
[local]:5432 pg12@testdb=# truncate table t_p1;
TRUNCATE TABLE
Time: 3.413 ms
[local]:5432 pg12@testdb=# insert into t_p1(id,c1) values(1,1);
INSERT 0 1
Time: 1.152 ms
[local]:5432 pg12@testdb=# insert into t_p1(id,c1) values(2,100);
INSERT 0 1
Time: 0.871 ms
[local]:5432 pg12@testdb=# insert into t_p1(id,c1) values(3,125);
INSERT 0 1
Time: 0.487 ms
[local]:5432 pg12@testdb=# insert into t_p1(id,c1) values(4,200);
INSERT 0 1
Time: 0.949 ms
[local]:5432 pg12@testdb=# insert into t_p1(id,c1) values(5,250);
INSERT 0 1
Time: 0.494 ms
[local]:5432 pg12@testdb=# insert into t_p1(id,c1) values(6,300);
INSERT 0 1
Time: 0.463 ms
[local]:5432 pg12@testdb=# insert into t_p1(id,c1) values(7,350);
INSERT 0 1
Time: 0.481 ms
[local]:5432 pg12@testdb=# insert into t_p1(id,c1) values(8,4500);
INSERT 0 1
Time: 0.464 ms
[local]:5432 pg12@testdb=#
[local]:5432 pg12@testdb=# alter table t_p1 detach partition t_p1_maxvalue;
ALTER TABLE
Time: 0.864 ms
[local]:5432 pg12@testdb=# create table t_p1_3 partition of t_p1 for values from (200) to (300);
CREATE TABLE
Time: 1.752 ms
[local]:5432 pg12@testdb=# insert into t_p1_3 select * from t_p1_maxvalue where c1 >= 200 and c1 < 300;
INSERT 0 2
Time: 7.578 ms
[local]:5432 pg12@testdb=# delete from t_p1_maxvalue where c1 >= 200 and c1 < 300;
DELETE 2
Time: 21.992 ms
[local]:5432 pg12@testdb=# alter table t_p1 attach partition t_p1_maxvalue for values from (300) to (maxvalue);
ALTER TABLE
Time: 7.356 ms
[local]:5432 pg12@testdb=#Oracle
TEST-orcl@DESKTOP-V430TU3>create table t_p1(id int,c1 int)
2 partition by range(c1)
3 (partition p1 values less than(100),
4 partition p2 values less than(200),
5 partition pmax values less than(maxvalue)
6 );
Table created.
TEST-orcl@DESKTOP-V430TU3>
TEST-orcl@DESKTOP-V430TU3>truncate table t_p1;
Table truncated.
TEST-orcl@DESKTOP-V430TU3>insert into t_p1(id,c1) values(1,1);
1 row created.
TEST-orcl@DESKTOP-V430TU3>insert into t_p1(id,c1) values(2,100);
1 row created.
TEST-orcl@DESKTOP-V430TU3>insert into t_p1(id,c1) values(3,125);
1 row created.
TEST-orcl@DESKTOP-V430TU3>insert into t_p1(id,c1) values(4,200);
1 row created.
TEST-orcl@DESKTOP-V430TU3>insert into t_p1(id,c1) values(5,250);
1 row created.
TEST-orcl@DESKTOP-V430TU3>insert into t_p1(id,c1) values(6,300);
1 row created.
TEST-orcl@DESKTOP-V430TU3>insert into t_p1(id,c1) values(7,350);
1 row created.
TEST-orcl@DESKTOP-V430TU3>insert into t_p1(id,c1) values(8,4500);
1 row created.
TEST-orcl@DESKTOP-V430TU3>alter table t_p1 split partition pmax at(1000) into (partition p3,partition pmx);
Table altered.
TEST-orcl@DESKTOP-V430TU3>可以参照EDB的做法,加入此兼容性.
到此，相信大家对“Oracle与PostgreSQL拆分分区有什么不同”有了更深的了解，不妨来实际操作一番吧！这里是亿速云网站，更多相关内容可以进入相关频道进行查询，关注我们，继续学习！
