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  • How to Find Stale Materialized Views in Oracle

    Use this Oracle Database Script to find Stale Materialized Views in Oracle. What are Stale Materialized Views ? Stale means that using the materialized view would yield a different result than using the base table. You can fix this by:

    • Manually refreshing the view. This is useful when data is written periodically (loaded once an hour).
    • Configuring it for fast refresh on commit. This is useful when data is updated more frequently, and it means that whenever one session commits, the materialized view is updated.
    • Accept stale data (changing the parameter query_rewrite_integrity to STALE_TOLERATED). This is useful when dealing with higher level aggregates.
    Any here is the script to identify Stale Materialized Views in Oracle.
    column owner heading "Owner" format a10;
    column mview_name heading "View Name" format a30;
    column last_refresh_date heading "Last Refresh|Date";
    column refresh_method heading "Refresh|Method";
    select owner,mview_name,last_refresh_date, refresh_method
    from all_mview_analysis
    where known_stale = 'Y';
    clear columns;


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