[GitHub] [drill] luocooong commented on pull request #2412: DRILL-8088: Improve expression evaluation performance

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luocooong commented on pull request #2412:
URL: https://github.com/apache/drill/pull/2412#issuecomment-1004154855


   @paul-rogers Hello, thanks for the information. I just have a few questions I'd like to know..
   - **Code gen path** :  Are you talking about the `Code Generation Workflow`? If we are going to use the native java tools, is there anything we can do for this?
   - **Use provided-schema** : If we provide the schema at query time, does it mean that we can also generate code once like Spark?
   - **Refactors and changes** : Is there any reference old tickets were used to rewrite and improve the CG path?
   - **Vectorization** : As I understand, Drill only implements vector storage, but had not implemented the vectorization base on these vector value, is that correct?


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