Github user cloud-fan commented on the issue:
https://github.com/apache/spark/pull/18248
I think the real issue is that, we mistakenly add statistics in `ALTER
TABLE`. This is because `ExternalCatalog.alterTable` is heavily used when we
wanna change something for a table. I think it would be better to introduce a
`ExternalCatalog.alterTableStats` and use it in `ANALYZE TABLE`, so that `ALTER
TABLE` won't add statistics.
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