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Posted to commits@doris.apache.org by GitBox <gi...@apache.org> on 2022/05/31 07:27:32 UTC

[GitHub] [incubator-doris] englefly opened a new pull request, #9881: opt column_dictinary range filter

englefly opened a new pull request, #9881:
URL: https://github.com/apache/incubator-doris/pull/9881

   # Proposed changes
   字典重新排序后，前后两本字典的字典码转换关系原来实现使用map。改为vector保存对应关系，可以提高查找新字典码的速度。
   测试数据 ssb_flat 5G
   SQL： select    count(P_BRAND)    FROM    lineorder_flat        WHERE    P_BRAND    <=    'MFGR#2228'
   测试对比细节如下（total是sql执行时间，字典转码包含在profile的ShortPredEvalTime counter中）
   - 修改前 （total， ShortPredEvalTime）
   1. 1251ms, 457ms
   2. 1427ms, 512ms
   3. 1247ms 438ms
   - 修改后 （total， ShortPredEvalTime）
   1.  1490ms， 332ms
   4. 800ms， 167ms
   5. 1266ms, 274ms
   
   测试结论：sql执行时间从1317ms提高到1185ms，ShortPredEvalTime 从469 提高到257，提高 45%
   
   Issue Number: close #xxx
   
   ## Problem Summary:
   
   Describe the overview of changes.
   
   ## Checklist(Required)
   
   1. Does it affect the original behavior: (Yes/No/I Don't know)
   6. Has unit tests been added: (Yes/No/No Need)
   7. Has document been added or modified: (Yes/No/No Need)
   8. Does it need to update dependencies: (Yes/No)
   9. 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 [dev@doris.apache.org](mailto: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] github-actions[bot] commented on pull request #9881: opt column_dictinary range filter

Posted by GitBox <gi...@apache.org>.
github-actions[bot] commented on PR #9881:
URL: https://github.com/apache/incubator-doris/pull/9881#issuecomment-1141800703

   PR approved by anyone and no changes requested.


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[GitHub] [incubator-doris] yiguolei merged pull request #9881: opt column_dictinary range filter

Posted by GitBox <gi...@apache.org>.
yiguolei merged PR #9881:
URL: https://github.com/apache/incubator-doris/pull/9881


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[GitHub] [incubator-doris] github-actions[bot] commented on pull request #9881: opt column_dictinary range filter

Posted by GitBox <gi...@apache.org>.
github-actions[bot] commented on PR #9881:
URL: https://github.com/apache/incubator-doris/pull/9881#issuecomment-1142025155

   PR approved by at least one committer and no changes requested.


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