### Describe the bug Extended CI is failing on `main` and in up-to-date PRs after merging #21126: https://github.com/apache/datafusion/actions/runs/23733708518/job/69133106609 We need to land changes in the `datafusion-testing` repo first, then bump our submodule to that commit when a fixed #21126 goes in. ### To Reproduce _No response_ ### Expected behavior _No response_ ### Additional context _No response_
Activity
fix: Revert "Fix/support duplicate column names #6543 (#21126)" (#21254)
fix: Revert "Fix/support duplicate column names apache#6543 (apache#2…