wwj6591812 opened a new pull request, #9202:
URL: https://github.com/apache/paimon/pull/9202
### Purpose
`totalRecordCount` and `deltaRecordCount` in snapshots are calculated from
the row counts of data files. They are file-level, unmerged counts rather than
logical table row counts.
This distinction is especially visible for Dedicated Format tables:
appending `N` logical rows with one dedicated BLOB column produces `N` records
in regular data files and `N` records in BLOB data files, so `deltaRecordCount`
increases by `2 * N`.
This PR preserves the existing file-level semantics discussed in #7779 and
#7828. It clarifies the API and documentation instead of changing the counters
to logical-row semantics.
### Changes
- Clarify `totalRecordCount` and `deltaRecordCount` in the snapshot spec,
system-table docs, PyPaimon docs, and Java API comments.
- Document the Dedicated BLOB example and recommend `COUNT(*)` when the
logical row count is needed.
- Add regression assertions for one dedicated BLOB column (`2 * N`) and two
dedicated BLOB columns (`3 * N`), while the existing reader assertions continue
to verify `N` logical rows.
### Tests
```text
mvn -pl paimon-core -am -Pfast-build \
-DfailIfNoTests=false \
-Dsurefire.failIfNoSpecifiedTests=false \
-DwildcardSuites=none \
-Dtest=BlobTableTest#testBasic,MultipleBlobTableTest#testBasic package
```
Result: 2 tests passed, 0 failures/errors.
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