Snapshot , snapshot log , refresh .

[tarek]

( Please excuse me becuase i'm writing this message from pc which haven't any oracle version and any sql editor , so i had to write the sql senario manually . Pls excuse me again )

Hi all..
With Oracle 8I, I have 3 snapshots on same table , and i'm using fast refresh by snapshot log on the table and the dbms_snapshot.refreshy() procedure .
The question is , how could i keep the data in the snapshot log after refreshing any snapshot to use it in the another snapshot refreshing .
Thanks in advance .

My scenario is :
--------------------

Connect xxx/xxx@db1;
Connected

Create table t1 ( a number(3)primary key, b varchar2(100));
Table created

create snapshot log on t1;
snapshot log created

connect xxx/xxx@db2
connected

create snapshot snp1 refresh fast with primary key on demand
as select * from xxx.t1@db1 wheer a=5;
snapshot created

create snapshot snp2 refresh fast with primary key on demand
as select * from xxx.t1@db1 wheer a=10;
snapshot created

create snapshot snp3 refresh fast with primary key on demand
as select * from xxx.t1@db1 wheer a=15;
snapshot created

connect xxx/xxx@db1;
connected

insert into t1 values(5,'xxx');
1 row inserted
insert into t1 values(10,'yyy');
1 row inserted
insert into t1 values(15,'zzz');
1 row inserted
commit;

select * from mlog$_t1;
(I will have the last 3 inserted rows )

connect xxx/xxx@db2
connected

begin
dbms_snapshot.refresh('snp1');
end;
/
procedure completed

select * from snp1;
a b
------ ---------
5 xxx
1 row selected

connect xxx/xxx@db1;
connected

select * from mlog$_t1;
no row selected

How could i keep the another two rows to use when I need to refresh snp2, snp3 , and if u want me to refresh the another two snapshot with the first within one procedure , so it's not possible because each snapshot is on different site .
Thanks .

[dasari98]

Hi,

I don't have a solution for you question .but if the volume of data

is not high. u can do a complete refresh for now.