DBA_MVIEWS

All materialized views in the database
Columns
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   OWNER
      Owner of the materialized view
   MVIEW_NAME
      Name of the materialized view
   CONTAINER_NAME
      Name of the materialized view container table
   QUERY
      The defining query that the materialized view instantiates
   QUERY_LEN
      The number of bytes in the defining query (based on the server character set
   UPDATABLE
      Indicates whether the materialized view can be updated
   UPDATE_LOG
      Name of the table that logs changes to an updatable materialized view
   MASTER_ROLLBACK_SEG
      Name of the rollback segment to use at the master site
   MASTER_LINK
      Name of the database link to the master site
   REWRITE_ENABLED
      Indicates whether rewrite is enabled for the materialized view
   REWRITE_CAPABILITY
      Indicates the kind of rewrite that is enabled
   REFRESH_MODE
      Indicates how and when the materialized view will be refreshed
   REFRESH_METHOD
      The default refresh method for the materialized view (complete,fast,...)
   BUILD_MODE
      How and when to initially build (load) the materialized view container
   FAST_REFRESHABLE
      Indicates the kinds of operations that can be fast refreshed for the MV
   LAST_REFRESH_TYPE
      Indicates the kind of refresh that was last performed on the MV
   LAST_REFRESH_DATE
      The date that the materialized view was last refreshed
   STALENESS
      Indicates the staleness state of the materialized view (fresh,stale,...)
   AFTER_FAST_REFRESH
      Indicates the staleness state the MV will have after a fast refresh is done
   UNKNOWN_PREBUILT
      Indicates if the materialized view is prebuilt
   UNKNOWN_PLSQL_FUNC
      Indicates if the materialized view contains PL/SQL function
   UNKNOWN_EXTERNAL_TABLE
      Indicates if the materialized view contains external tables
   UNKNOWN_CONSIDER_FRESH
      Indicates if the materialized view is considered fresh
   UNKNOWN_IMPORT
      Indicates if the materialized view is imported
   COMPILE_STATE
      Indicates the validity of the MV meta-data
   USE_NO_INDEX
      Indicates whether the MV uses no index