Materialized Views (MVIEWs) Refresh Order Using "DBMS_SNAPSHOT.REFRESH" LIST Parameter; 9i Vs 10g and Higher Versions
Last updated on MAY 10, 2012
Applies to:Oracle Server - Enterprise Edition - Version 10.2.0.1 to 184.108.40.206 [Release 10.2 to 11.2]
Information in this document applies to any platform.
In 10g and above versions, Oracle does not refresh the MVIEWs in sequence as specified in the "LIST" parameter in the DBMS_SNAPSHOT.REFRESH / DBMS_MVIEW.REFRESH procedure. MVIEWs are sorted and refreshed in alphabetical order from 10g onwards. Whereas in 9i, it refreshes the MVIEWs as specified in LIST parameter; there is no sorting by MVIEW name in 9i.
Customer used to refresh a set of MVIEWs based on its dependencies in 9i version. After upgrading to 10g/11g, the same set of MVIEWs are getting refreshed in alphabetical order, and the impact is MVIEWs are not getting correct data as the order is changed.
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