ArnavBalyan opened a new pull request, #7803:
URL: https://github.com/apache/paimon/pull/7803
### Purpose
- Stats merges today ignores type changes during schema evolution. After
`alter table` changes (eg Int to String), stats from older files written under
the prior schema are merged in under the new type.
- When types mismatch, this causes garbage stats to be accumulated which
causing wrong pruning/silently data drop.
- Ensure we can detect this mismatch and skip the stats for such cases.
### Tests
- UT
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