hzjhjjyy commented on PR #3299: URL: https://github.com/apache/paimon/pull/3299#issuecomment-2109153404
Hi @JingsongLi . My own understanding of this PR: 1. For Paimon, this pr is indeed no optimization regarding the calculation method for partial update. The optimization focuses only on reducing the fields retrieved and transmitted when rewriting sql for updates to selects on the flink side. Of course, this has some optimization for large tables since updates typically don't involve many fields simultaneously. 2. Currently, updates are only provided for deduplication and partial-update. Considering the similarity between partial update and aggregation in agg functions, support for aggregation has been added. In my description above, I specifically mentioned last_value just because of its uniqueness, hence the separate mention of its special treatment in this pr. Last_non_null_value can be implemented without special treatment. Overall, this pr aims to support the feature of using partial columns in updates in flink. I wonder if my explanation clarifies and captures your intent? -- 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: issues-unsubscr...@paimon.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
