wangbo opened a new issue #8388:
URL: https://github.com/apache/incubator-doris/issues/8388


   ### Search before asking
   
   - [X] I had searched in the 
[issues](https://github.com/apache/incubator-doris/issues?q=is%3Aissue) and 
found no similar issues.
   
   
   ### Description
   
   When a query hits index, then index bitmap is reset;
   Storage layer read rows by index bitmap.
   In the current implementation, even a query doesn't hit any index, storage 
still need to read rows by index bitmap.
   This could bring two costs:
   1 Read data from roaring bitmap.
   2 The foreach to read rowids from roaring bitmap.
   
   There is still optimization room for query without indexes.
   
   ### Solution
   
   _No response_
   
   ### Are you willing to submit PR?
   
   - [X] Yes I am willing to submit a PR!
   
   ### Code of Conduct
   
   - [X] I agree to follow this project's [Code of 
Conduct](https://www.apache.org/foundation/policies/conduct)
   


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