kerwin-zk commented on PR #8382:
URL: https://github.com/apache/paimon/pull/8382#issuecomment-4842161202

   Thanks for the suggestion. I have updated this PR from a metadata-only step 
to a complete core implementation:
   
   - statistics sidecar file writer / reader for multiple typed blob payloads
   -  JSON lifecycle with backward compatibility
   -  sidecar read / write APIs and sidecar cleanup on statistics deletion
   - orphan-file cleanup protection for sidecars referenced by live statistics 
files
   - mergeable NDV blob support based on Apache DataSketches Theta sketch
   
   I kept Spark ANALYZE integration out of this PR for now so that we can first 
review the core format and lifecycle behavior. If this direction looks 
reasonable, Spark can be wired to produce / consume the NDV sidecar in a 
follow-up PR.


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