Oracle 間隔分區(qū)

在Oracle 11g之前，如果我們往一個(gè)沒(méi)有匹配到滿足分區(qū)的RANGE分區(qū)寫(xiě)記錄的時(shí)候會(huì)報(bào) ORA-14400: inserted partition key does not map to any partition，因?yàn)檫@個(gè)原因我已經(jīng)半夜起來(lái)過(guò)好幾次。

如果Oracle在更新記錄或者新增記錄的時(shí)候發(fā)現(xiàn)沒(méi)有匹配的分區(qū)能自動(dòng)分區(qū)該多好，在oracle11g中oracle實(shí)現(xiàn)了這個(gè)功能。-
 

看個(gè)簡(jiǎn)單的例子。

etl@DWTEST19> create table part_01
  2  (
  3    col01 date
  4  )
  5  partition by range(col01)
  6  (
  7    partition p201001 values less than ( to_date('20100201','yyyymmdd') ),
  8    partition p201002 values less than ( to_date('20100301','yyyymmdd') )
  9  )
 10  /

Table created.
etl@DWTEST19> insert into part_01 values( to_date('20100301','yyyymmdd'));
insert into part_01 values( to_date('20100301','yyyymmdd'))
            *
ERROR at line 1:
ORA-14400: inserted partition key does not map to any partition

可以看出在沒(méi)有分區(qū)滿足的時(shí)候會(huì)報(bào)錯(cuò)。

下面看看Oracle11g提供的間隔分區(qū)功能
etl@DWTEST>create table part_01
  2  (
  3    col01 date
  4  )
  5  partition by range(col01)
  6  interval (numtoyminterval(1,'MONTH'))
  7  (
  8    partition p201001 values less than ( to_date('20100201','yyyymmdd') )
  9  )
 10  /

Table created.

Elapsed: 00:00:00.08
etl@DWTEST>insert into part_01 values( to_date('20101001','yyyymmdd') );

1 row created.

Elapsed: 00:00:00.07
etl@DWTEST>select partition_name,high_value
  2    from user_tab_partitions
  3   where table_name='PART_01';

PARTITION_NAME  HIGH_VALUE
--------------- --------------------------------------------------
P201001         TO_DATE(' 2010-02-01 00:00:00', 'SYYYY-MM-DD HH24:
                MI:SS', 'NLS_CALENDAR=GREGORIAN')

SYS_P36675      TO_DATE(' 2010-11-01 00:00:00', 'SYYYY-MM-DD HH24:
                MI:SS', 'NLS_CALENDAR=GREGORIAN')

Elapsed: 00:00:00.45
etl@DWTEST>insert into part_01 values( to_date('20100901','yyyymmdd') );

1 row created.

Elapsed: 00:00:01.37
etl@DWTEST>select partition_name,high_value
  2    from user_tab_partitions
  3   where table_name='PART_01';

PARTITION_NAME  HIGH_VALUE
--------------- --------------------------------------------------
P201001         TO_DATE(' 2010-02-01 00:00:00', 'SYYYY-MM-DD HH24:
                MI:SS', 'NLS_CALENDAR=GREGORIAN')

SYS_P36675      TO_DATE(' 2010-11-01 00:00:00', 'SYYYY-MM-DD HH24:
                MI:SS', 'NLS_CALENDAR=GREGORIAN')

SYS_P36676      TO_DATE(' 2010-10-01 00:00:00', 'SYYYY-MM-DD HH24:
                MI:SS', 'NLS_CALENDAR=GREGORIAN')

Elapsed: 00:00:00.43

可以看出Oracle很好的為我們處理了加分區(qū)的操作。

但是，分區(qū)名，分區(qū)名怎么指定呢？

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