Github user wzhfy commented on the issue:
https://github.com/apache/spark/pull/18105
@cloud-fan I mean the behavior when cbo is disabled should be the same as
the behavior previously without cbo.
Previously, size is read from "totalSize", and it changes after update.
Now, when cbo is enabled, I agree that user is responsible to re-analyze.
But when cbo is disabled, I think user expects the behavior without cbo, i.e.
read "totalSize" from metastore.
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