vamsikarnika opened a new pull request, #18402: URL: https://github.com/apache/hudi/pull/18402
### Describe the issue this Pull Request addresses https://github.com/apache/hudi/issues/18376 - Support bootstrapping of col stats for MOR table. - Fix clean operation with col stats. Even though stats are nullified, the records apparently were not deleted from the col stats partition. ### Summary and Changelog - Support bootstrapping of col stats for MOR table. - Fix clean operation with col stats. Even though stats are nullified, the records apparently were not deleted from the col stats partition. ### Impact We could enable col stats for MOR table at any given state. Ran into other issues along the way which I had to fix to get the patch ready. - DirectoryInfo was not accounting for files fetched from MDT. When a new MDT partition is initialized, to fetch file info, we poll MDT rather than doing FS based listing. This had some a bug and had to fix it. - When clean from data table is applied to MDT, we were nullifying the stats or marking it as deleted, but the record as such is not deleted from col stats partition and was lingering. Fixed the same in this patch. Tests covered: - bootstrapping of both COW and MOR table. - Covered both partitioned and non-partitioned table. - Ensure log files w/ delete block, partially failed log blocks and rollback blocks are accounted for in tests. - Added tests to validate clean does remove the entry from col stats for both table types and partition and non-partitioned table. ### Risk Level low ### Documentation Update <!-- Describe any necessary documentation update if there is any new feature, config, or user-facing change. If not, put "none". - The config description must be updated if new configs are added or the default value of the configs are changed. - Any new feature or user-facing change requires updating the Hudi website. Please follow the [instruction](https://hudi.apache.org/contribute/developer-setup#website) to make changes to the website. --> ### Contributor's checklist - [ ] Read through [contributor's guide](https://hudi.apache.org/contribute/how-to-contribute) - [ ] Enough context is provided in the sections above - [ ] Adequate tests were added if applicable -- 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]
