[英]ORACLE - materialized view
我正在嘗試創建物化視圖。
我有 2 個數據庫 ORA1 和 ORA2。 我在 ORA1 上有表 POKUS,我試圖在 ORA2 上創建視圖,每次我在表 POKUS 中更改和提交對 ORA1 的更改時,該視圖都會更改。
這是我的查詢。 但它不起作用:
CREATE MATERIALIZED VIEW
REPLIKOVANY_POKUS2
REFRESH FAST START WITH
SYSDATE NEXT SYSDATE + 1/24/60
ENABLE QUERY REWRITE AS
SELECT *
FROM dovondrda3.POKUS@ora1.uhk.cz;
你能幫我請求嗎
每次我在 ORA1 上更改和提交更改時都會更改
好吧,您不能這樣做,不能通過數據庫鏈接,因為當涉及遠程數據庫時on commit
時刷新將不起作用。 它記錄在數據倉庫指南中的某處; 搜索它,如果你願意。
遠程數據庫:
SQL> create table a1_brisime as
2 select * from tom
3 where sifra = '0387779';
Table created.
SQL> alter table a1_brisime add constraint pkab primary key (sifra);
Table altered.
SQL> create materialized view log on a1_brisime;
Materialized view log created.
SQL>
本地數據庫:
SQL> create materialized view mv_test
2 refresh fast on commit as
3 select sifra, naziv
4 from a1_brisime@dbl_test
create materialized view mv_test
*
ERROR at line 1:
ORA-12054: cannot set the ON COMMIT refresh attribute for the materialized view
SQL>
正如我所說 - 它不會工作。 因此,切換到另一個選項,例如on demand
:
SQL> create materialized view mv_test
2 refresh on demand as
3 select sifra, naziv
4 from a1_brisime@dbl_test
Materialized view created.
SQL>
或預定(如您所試):
SQL> create materialized view mv_test
2 refresh complete
3 start with sysdate
4 next sysdate + 1/24/60
5 as
6 select sifra, naziv
7 from a1_brisime@dbl_test
Materialized view created.
SQL>
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