luwei16 opened a new pull request, #66840:
URL: https://github.com/apache/doris/pull/66840
### What problem does this PR solve?
Issue Number: None
Related PR: #63110
Problem Summary: ROW binlog rejected fixed partial-update blocks when the
input width exactly matched the source schema key count, even though key-only
updates are valid. Align the lower-bound check with the regular partial-update
validation, report source-schema dimensions, and classify malformed widths as
invalid arguments. Add BE coverage for the original narrow block and invalid
boundaries, plus regression coverage for APPEND and ERROR new-key policies,
historical values, and failed-transaction atomicity.
### Release note
Allow key-only fixed partial updates on UNIQUE KEY merge-on-write tables
with ROW binlog enabled.
### Check List (For Author)
- Test:
- Static check: clang-format v16, build-support/check-format.sh, and git
diff --check passed.
- Unit Test: Added GroupRowsetWriterTest coverage; not run locally per
request, pending CI.
- Regression test: Added row_binlog_p0 assertion-based coverage; not run
locally per request, pending CI.
- clang-tidy: Not run locally because the BE build was delegated to CI.
- Behavior changed: Yes. ROW binlog accepts valid key-only fixed partial
updates, while malformed widths return INVALID_ARGUMENT with source-schema
diagnostics.
- Does this need documentation: No
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