LuciferYang commented on PR #59121:
URL: https://github.com/apache/spark/pull/59121#issuecomment-5886754664

   Checked whether this cleanly reverts #55925 and #57826, and it does. 
Re-running `git revert` of both commits on the base produces a tree identical 
to this PR's head except for two trailing blank lines in 
`ExpandBenchmark-jdk21-results.txt` that a plain revert keeps. Both reverts 
apply without conflict; only `SQLConf.scala` needed an auto-merge. No reference 
to the removed config remains anywhere in the tree, and the feature is fully 
contained in these two commits, so nothing else depends on it.
   
   One non-blocking note: the restored `ExpandBenchmark.scala` still runs the 
`Expand: subexpression elimination across branches` section, but none of the 
three result files carry it (jdk21 loses it here, jdk25/default never had it on 
master). That lag predates #57826, so the revert just restores it, and it also 
drops the section that only jdk21 carried, so the three files line up again. 
Benchmarks aren't in CI, so this doesn't block anything; regenerate the result 
files after merge if you want it fully clean.
   
   LGTM.
   


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