Caideyipi commented on PR #18171:
URL: https://github.com/apache/iotdb/pull/18171#issuecomment-5215272988

   Thanks for the deeper follow-up. I addressed the concrete reachability gap 
in 0d8c239cb91: AbstractConsumeAllOperator now clears inputTsBlocks when a 
child finishes, so a zero-row block cannot remain as a non-null finished-child 
slot. I added testGroupByIntermediateResultWithFinishedEmptyChild with a 
deterministic empty child and verified the remaining child aggregate is still 
produced. This also protects the sibling consume-all operators that share the 
base implementation. I left the tsBlockIndex assertion and broader 
sibling-specific tests out of this focused fix; the existing null guards remain 
valid once the base slot invariant is restored.


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