seawinde opened a new pull request, #55194:
URL: https://github.com/apache/doris/pull/55194

   ### What problem does this PR solve?
   Support limit or topN rewrite when materialized view contains limit or topN
   
   such as mv def is as fllowing
   ```sql
           CREATE MATERIALIZED VIEW mv_with_limit
           BUILD IMMEDIATE REFRESH COMPLETE ON MANUAL
           DISTRIBUTED BY RANDOM BUCKETS 2
           PROPERTIES ('replication_num' = '1') 
           AS
               select
               o_orderdate,
               o_shippriority,
               o_comment
               from
               orders
               limit 4 offset 2;
   ```
   
   query is as following which can be rewritten success by mv `mv_with_limit` 
above
   ```sql
               select
               o_orderdate,
               o_shippriority,
               o_comment
               from
               orders
               limit 2 offset 3;
   ```
   
   
   another example:
   such as mv def is as fllowing
   ```sql
           CREATE MATERIALIZED VIEW mv_with_topN
           BUILD IMMEDIATE REFRESH COMPLETE ON MANUAL
           DISTRIBUTED BY RANDOM BUCKETS 2
           PROPERTIES ('replication_num' = '1') 
           AS
               select
               o_orderdate,
               o_shippriority,
               o_comment
               from
               orders
               order by o_orderkey
               limit 4 offset 2;
   ```
   
   query is as following which can be rewritten success by mv `mv_with_topN` 
above
   ```sql
               select
               o_orderdate,
               o_shippriority,
               o_comment
               from
               orders
               order by o_orderkey
               limit 2 offset 5;
   ```
   
   
   
   Issue Number: close #xxx
   
   Related PR: #xxx
   
   Problem Summary:
   
   ### Release note
   
   None
   
   ### Check List (For Author)
   
   - Test <!-- At least one of them must be included. -->
       - [x] Regression test
       - [ ] Unit Test
       - [ ] Manual test (add detailed scripts or steps below)
       - [ ] No need to test or manual test. Explain why:
           - [ ] This is a refactor/code format and no logic has been changed.
           - [ ] Previous test can cover this change.
           - [ ] No code files have been changed.
           - [ ] Other reason <!-- Add your reason?  -->
   
   - Behavior changed:
       - [ ] No.
       - [ ] Yes. <!-- Explain the behavior change -->
   
   - Does this need documentation?
       - [ ] No.
       - [ ] Yes. <!-- Add document PR link here. eg: 
https://github.com/apache/doris-website/pull/1214 -->
   
   ### Check List (For Reviewer who merge this PR)
   
   - [ ] Confirm the release note
   - [ ] Confirm test cases
   - [ ] Confirm document
   - [ ] Add branch pick label <!-- Add branch pick label that this PR should 
merge into -->
   
   


-- 
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.

To unsubscribe, e-mail: [email protected]

For queries about this service, please contact Infrastructure at:
[email protected]


---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]

Reply via email to