yangzhg opened a new pull request, #11218:
URL: https://github.com/apache/doris/pull/11218

   
   # Proposed changes
   
   Issue Number: #7503 
   
   ## Problem Summary:
   
   support `create`,`alter`,`refresh`,`drop` stmt for multi table materialized 
view
   
   ### create
   
   ```sql
   create materialized view mv_name     
   build [immediate | deferred]                 
   refresh [fast | complete | never].     
   on [commit | demand]                 
   start with start_time                
   next interval        
   PARTITION BY [range|list]   
   DISTRIBUTED BY hash(cols..) BUCKETS 16 
   PROPERTIES()      
   as              
   select ...;    
   ```
   
   
   ### DESC
   
   ```sql
   DESCRIBE test_mv_view;
   ```
   
   ###  SHOW CREATE
   
   ```sql
   SHOW CREATE MATERIALIZED VIEW test_mv_view;
   ```
   
   ### DROP
   
   ```sql
   DROP MATERIALIZED VIEW test_mv_view;
   ```
   
   ### ALTER
   
   ```sql
   alter materialized view mv1
   refresh [fast | complete | never]
   on [commit | demand]
   start with start_time
   next interval
   ```
   
   ### refresh
   
   ```sql
   REFRESH MATERIALIZED VIEW test_mv_view [complete];
   ```
   
   
   ## Checklist(Required)
   
   1. Does it affect the original behavior: (Yes/No/I Don't know)
   2. Has unit tests been added: (Yes/No/No Need)
   3. Has document been added or modified: (Yes/No/No Need)
   4. Does it need to update dependencies: (Yes/No)
   5. Are there any changes that cannot be rolled back: (Yes/No)
   
   ## Further comments
   
   If this is a relatively large or complex change, kick off the discussion at 
[d...@doris.apache.org](mailto:d...@doris.apache.org) by explaining why you 
chose the solution you did and what alternatives you considered, etc...
   


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