[GitHub] [incubator-doris] qidaye opened a new pull request #6233: [Feature] Support calc constant expr by BE

[GitBox <gi...@apache.org>]

qidaye opened a new pull request #6233:
URL: https://github.com/apache/incubator-doris/pull/6233


   ## Proposed changes
   
   At present, some constant expression calculations are implemented on the FE side,
   but they are incomplete, and some expressions cannot be completely consistent with
   the value calculated by BE (such as part of the time function)
   
   Therefore, we provide a way to pass all the constants in SQL to BE for calculation,
   and then begin to analyze and plan SQL. This method can also solve the problem that some
   complex constant calculations issued by BI cannot be processed on the FE side.
   
   Here through a session variable `enable_fold_constant_by_be` to control this function,
   which is disabled by default.
   
   ## Types of changes
   
   What types of changes does your code introduce to Doris?
   _Put an `x` in the boxes that apply_
   
   - [ ] Bugfix (non-breaking change which fixes an issue)
   - [x] New feature (non-breaking change which adds functionality)
   - [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
   - [x] Documentation Update (if none of the other choices apply)
   - [ ] Code refactor (Modify the code structure, format the code, etc...)
   - [ ] Optimization. Including functional usability improvements and performance improvements.
   - [ ] Dependency. Such as changes related to third-party components.
   - [ ] Other.
   
   ## Checklist
   
   _Put an `x` in the boxes that apply. You can also fill these out after creating the PR. If you're unsure about any of them, don't hesitate to ask. We're here to help! This is simply a reminder of what we are going to look for before merging your code._
   
   - [x] I have created an issue on (Fix #6232 ) and described the bug/feature there in detail
   - [ ] Compiling and unit tests pass locally with my changes
   - [ ] I have added tests that prove my fix is effective or that my feature works
   - [ ] If these changes need document changes, I have updated the document
   - [ ] Any dependent changes have been merged
   
   ## Further comments
   
   If this is a relatively large or complex change, kick off the discussion at dev@doris.apache.org by explaining why you chose the solution you did and what alternatives you considered, etc...
   


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[GitHub] [incubator-doris] morningman merged pull request #6233: [Feature] Support calc constant expr by BE

[GitBox <gi...@apache.org>]

morningman merged pull request #6233:
URL: https://github.com/apache/incubator-doris/pull/6233


   


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