jacktengg opened a new pull request, #18100: URL: https://github.com/apache/doris/pull/18100
# Proposed changes Issue Number: close #xxx ## Problem summary In the case of rowets non-overlap and desc sorting, the logic of VCollectIterator::Level0Iterator::init_for_union will be followed. In this function, the row ref pos of the first level0 iterator is set to 0, and the row pos of other level0 iterators are all Set to -1. But in the level1iterator, when rowets are non-overlapping and is ordering by desc, the list of rowset iterators will be reversed, causing the row ref pos of the first level0 iterator in the list to be -1, causing the block reader to think that the entire tablet has no data. ## Checklist(Required) * [ ] Does it affect the original behavior * [ ] Has unit tests been added * [ ] Has document been added or modified * [ ] Does it need to update dependencies * [ ] Is this PR support rollback (If NO, please explain WHY) ## Further comments If this is a relatively large or complex change, kick off the discussion at [[email protected]](mailto:[email protected]) by explaining why you chose the solution you did and what alternatives you considered, etc... -- 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]
