[GitHub] [spark] wzhfy opened a new pull request #26908: [SPARK-30269][SQL] Should use old partition stats to decide whether to update stats when analyzing partition

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wzhfy opened a new pull request #26908: [SPARK-30269][SQL] Should use old partition stats to decide whether to update stats when analyzing partition
URL: https://github.com/apache/spark/pull/26908
 
 
   
   ### What changes were proposed in this pull request?
   It's an obvious bug: currently when analyzing partition stats, we use old table stats to compare with newly computed stats to decide whether it should update stats or not.
   
   
   
   ### Why are the changes needed?
   bug fix
   
   
   ### Does this PR introduce any user-facing change?
   no
   
   
   ### How was this patch tested?
   add new tests
   

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