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Posted to github@datafusion.apache.org by "danielhumanmod (via GitHub)" <gi...@apache.org> on 2026/01/11 23:34:05 UTC

[I] [BUG] `EnsureCooperative` is not idempotent [datafusion]

danielhumanmod opened a new issue, #19756:
URL: https://github.com/apache/datafusion/issues/19756

   ### Describe the bug
   
   The current implementation of optimize using transform_up approach, which lacked context awareness regarding ancestor nodes. As a result, running the optimizer rule multiple times will produce nested CooperativeExec wrappers.
   
   
   
   ### To Reproduce
   
   _No response_
   
   ### Expected behavior
   
   1. Idempotency: Running the rule multiple times does not produce nested CooperativeExec wrappers (e.g., Coop(Coop(Scan))).
   
   2. Context Awareness: If a subtree is already protected by a CooperativeExec (e.g., from a previous optimization pass or manual plan construction), we should not double-wrap its children.
   
   ### Additional context
   
   _No response_


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Re: [I] [BUG] `EnsureCooperative` is not idempotent [datafusion]

Posted by "alamb (via GitHub)" <gi...@apache.org>.
alamb closed issue #19756: [BUG] `EnsureCooperative` is not idempotent
URL: https://github.com/apache/datafusion/issues/19756


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