feiniaofeiafei opened a new pull request, #66532: URL: https://github.com/apache/doris/pull/66532
## What problem does this PR solve? Optimize shuffle-key selection for Repeat decomposition: - Allow high-NDV columns to be selected when hot-value statistics are unavailable. - Use a stricter NDV threshold (`instanceNum * 128`) to ensure sufficient distribution. - Preserve the existing conservative behavior for other skew-detection scenarios. ## Release note Improve Repeat decomposition when hot-value statistics are missing. ## Check List - Test: No new test added - Behavior changed: Yes, adjusts Repeat shuffle-key selection - Does this need documentation: No -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
