How do I figure where is the data in a materialized view coming from

Question

Hi: when I run select NAME, OWNER from dba_mview_refresh_times, I see a number of materialized views. How do I find more details about this view i.e where is the data coming from and which fields. The source table that is in another database changed. But the view on my database where the materialized view exist has not changed. I want to confirm from where is data coming in this view
TIA
Ravi

Answer 1

SQL>  select * from dict where table_name like 'ALL%MVIEW%'
TABLE_NAME                     COMMENTS                                                             
ALL_BASE_TABLE_MVIEWS          All materialized views with log(s) in the database that the user can s
                               ee                                                                   
ALL_MVIEWS                     All materialized views in the database                               
ALL_MVIEW_AGGREGATES           Description of the materialized view aggregates accessible to the user
ALL_MVIEW_ANALYSIS             Description of the materialized views accessible to the user         
ALL_MVIEW_COMMENTS             Comments on materialized views accessible to the user                
ALL_MVIEW_DETAIL_PARTITION     Freshness information of all PCT materialized views in the database  
ALL_MVIEW_DETAIL_RELATIONS     Description of the materialized view detail tables accessible to the u
                               ser                                                                  
ALL_MVIEW_DETAIL_SUBPARTITION  Freshness information of all PCT materialized views in the database  
ALL_MVIEW_JOINS                Description of a join between two columns in the                     
                               WHERE clause of a materialized view accessible to the user           
ALL_MVIEW_KEYS                 Description of the columns that appear in the GROUP BY               
                               list of a materialized view accessible to the user                   
ALL_MVIEW_LOGS                 All materialized view logs in the database that the user can see     
ALL_MVIEW_REFRESH_TIMES        Materialized views and their last refresh times  for each master table
                                that the user can look at                                           
ALL_REGISTERED_MVIEWS          Remote materialized views of local tables that the user can see      
13 rows selected.