Oracle Materialized View Refresh Dependency

[Guru3i]

Hi Tim,

There are 2 Materialized views to be refreshed. "Mview B" is dependent on "Mview A", In other Words Mview B queries/retreives data from Mview A.

"Mview A" is scheduled to refresh @ 5.00 PM in the evening and "Mview B" @ 6 in the evening. At times "Mview A" doesnt gets refreshed before 6 PM. But however "Mview B" starts to refresh by 6 PM, if that happens the data retreived by Mview B will not be correct and consistent. Here how do we ensure that "Mview B" starts to refresh only after "Mview A" refresh is Over. How do we enforce a dependency on Mview B or check on Mview B that it should refresh only after Mview A is fully refreshed.

Thanks in advance.

[Tim...]

Hi.

1) Stop refreshing them automatically and independently. Instead create job and do a manual refresh of both in the correct order. That way the second will only ever start after the first is complete.

2) Stop refreshing them automatically and independently. Create two separate jobs in a job chain.

Cheers

Tim...