eldenmoon opened a new pull request, #63086:
URL: https://github.com/apache/doris/pull/63086
### What problem does this PR solve?
Issue Number: None
Related PR: None
Problem Summary: Flat-leaf compaction/checksum mode should keep root variant
reads on the root-flat path and should not fall back to doc-value root
reconstruction. Avoid probing an empty leaf path, keep explicit doc bucket
columns on DOC_COMPACT, and update the doc-bucket unit test to assert that root
uses VariantRootColumnIterator in flat-leaf mode.
### Release note
None
### Check List (For Author)
- Test: Unit Test
- `./run-be-ut.sh --run
--filter='VariantColumnWriterReaderTest.test_read_doc_compact_from_doc_value_bucket'`:
1 test passed
- `./run-be-ut.sh --run --filter='*Variant*'`: 172 tests from 16 test
suites, 171 passed, 1 skipped
- `build-support/clang-format.sh
be/src/storage/segment/variant/variant_column_reader.cpp
be/test/storage/segment/variant_column_writer_reader_test.cpp`
- `git diff --check`
- Behavior changed: No
- Does this need documentation: No
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