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Oracle数据库表范围分区策略测试过程

原创 Linux操作系统 作者:fengzj 时间:2008-12-28 11:07:09 0 删除 编辑

/*该试验针对按照递增列作为分区条件的情况,按照时间作为分区条件的等下次测试*/


create tablespace test01 datafile 'D:oracleoradatamyoratest01.dbf'size 50m;
create tablespace test02 datafile 'D:oracleoradatamyoratest02.dbf'size 50m;
create tablespace test03 datafile 'D:oracleoradatamyoratest03.dbf'size 50m;
create tablespace
test_idx01 datafile 'D:oracleoradatamyoratest_idx01.dbf'size 20m;
create tablespace
test_idx02 datafile 'D:oracleoradatamyoratest_idx02.dbf'size 20m;
create tablespace
test_idx03 datafile 'D:oracleoradatamyoratest_idx03.dbf'size 20m;
Create table test (
aa integer,
bb varchar2(100)
)
partition by rang(aa)(
Partition part_01 values less than(10000) Tablespace test_idx01,
Partition part_02 values less than(30000) Tablespace test_idx02,
Partition part_03 values less than(maxvalue)Tablespace test_idx03
);
Create Index idx_test_aa On test(aa)Local
(
Partition part_01 Tablespace test_idx01,
Partition part_02 Tablespace test_idx02,
Partition part_03 Tablespace test_idx03
);
-- Create sequence
create sequence seq_test_aa
minvalue 1
maxvalue 60000
start with 1
increment by 1
cache 10;
insert into test values(seq_test_aa.nextval,'test');
select Min(callid),Max(callid),Count(*) from test partition(part_01);
select Min(callid),Max(callid),Count(*) from test partition(part_02);
select Min(callid),Max(callid),Count(*) from test partition(part_03);
select Min(callid),Max(callid),Count(*) from test Where callid < 10000;
select Min(callid),Max(callid),Count(*) from test Where callid > 10000
And callid < 30000;
select Min(callid),Max(callid),Count(*) from test Where callid >= 30000;
exp test/test@myora file=e:test01.dmp buffer=8192000 tables=test:part_01 rows=Y
exp test/test@myora file=e:test02.dmp buffer=8192000 tables=test:part_02 rows=Y
exp test/test@myora file=e:test03.dmp buffer=8192000 tables=test:part_03 rows=Y
/*注意:这里删除的分区要从后面删,因为oracle不允许向前添加分区,只能向后添加分区*/
alter table cdr drop partition part03 ;
select Min(aa),Max(aa),Count(*) from test partition(part_01);
select Min(aa),Max(aa),Count(*) from test partition(part_02);
select Min(aa),Max(aa),Count(*) from test partition(part_03);
--本条将报错,提示无此分区
select Min(aa),Max(aa),Count(*) from test Where aa < 3000000;
select Min(aa),Max(aa),Count(*) from test Where aa > 3000000 And aa < 6000000;
select Min(aa),Max(aa),Count(*) from test Where aa >= 6000000; --将无数据显示
alter table test add partition part03 values less than(maxvalue) tablespace test03;
select Min(aa),Max(aa),Count(*) from test partition(part_01);
select Min(aa),Max(aa),Count(*) from test partition(part_02);
select Min(aa),Max(aa),Count(*) from test partition(part_03); --将无数据
select Min(aa),Max(aa),Count(*) from test Where aa < 3000000;
select Min(aa),Max(aa),Count(*) from test Where aa > 3000000 And aa < 6000000;
select Min(aa),Max(aa),Count(*) from test Where aa >= 6000000; --将无数据显示
imp test/test@myora FILE=e:test03.dmp TABLES = (cdr:part_03) IGNORE=y
select Min(aa),Max(aa),Count(*) from test partition(part_01);
select Min(aa),Max(aa),Count(*) from test partition(part_02);
select Min(aa),Max(aa),Count(*) from test partition(part_03);
select Min(aa),Max(aa),Count(*) from test Where aa < 3000000;
select Min(aa),Max(aa),Count(*) from test Where aa > 3000000 And aa < 6000000;
select Min(aa),Max(aa),Count(*) from test Where aa >= 6000000;
delete from test partition(part_02);
commit;
select Min(aa),Max(aa),Count(*) from test partition(part_01);
select Min(aa),Max(aa),Count(*) from test partition(part_02); --将无数据显示
select Min(aa),Max(aa),Count(*) from test partition(part_03);
select Min(aa),Max(aa),Count(*) from test Where aa < 3000000;
select Min(aa),Max(aa),Count(*) from test Where aa > 3000000 And aa < 6000000;
--将无数据显示
select Min(aa),Max(aa),Count(*) from test Where aa >= 6000000;
insert into test values(40000,'test');
commit;
select Min(aa),Max(aa),Count(*) from test partition(part_01);
select Min(aa),Max(aa),Count(*) from test partition(part_02); --将显示1条数据
select Min(aa),Max(aa),Count(*) from test partition(part_03);
select Min(aa),Max(aa),Count(*) from test Where aa < 3000000;
select Min(aa),Max(aa),Count(*) from test Where aa > 3000000 And aa < 6000000;
--将显示1条数据
select Min(aa),Max(aa),Count(*) from test Where aa >= 6000000;
select count(*) from test where aa > 1000001; --将有大量数据统计出
select count(*) from test partition(part_02) where aa > 1000001; --结果为0条
alter table cdr split partition part_02 at
(50000) into(partition part_02,partition part_06 tablespace test01p2);

通过这个测试,创建好的分区可以直接使用分区拆分功能对现有的分区进行分割,分割时可以指定表空间。因此,在这里建议以后创建分区的命名和 表空间的命名时可以从第二位或者第三位开始命名:如part_01,part_02,part_03.....,这样可以为以后的分区拆分留下扩展空间 (可以按照PB中的DataWindow的思想做)。

来自 “ ITPUB博客 ” ,链接:http://blog.itpub.net/219982/viewspace-523083/,如需转载,请注明出处,否则将追究法律责任。

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