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Posted to commits@doris.apache.org by GitBox <gi...@apache.org> on 2022/07/26 02:43:21 UTC

[GitHub] [doris] xiaokang commented on pull request #10694: optimize topn query if order by columns is prefix of sort keys of table

xiaokang commented on PR #10694:
URL: https://github.com/apache/doris/pull/10694#issuecomment-1194928145

   we test in a log matching senario, runtime of the following SQL drops significantly from **1.8s to 0.1s** 
   
   `SELECT * FROM log_table WHERE timestamp > t1 ORDER BY timestamp DESC LIMIT 100` 


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