Gabriel39 opened a new pull request, #67906:
URL: https://github.com/apache/doris/pull/67906
### What problem does this PR solve?
Problem Summary:
FileScannerV2 did not support selective reads by absolute file row position.
As a result, TopN two-phase materialization still had to use the legacy
FileScanner for its second-phase Parquet/ORC fetch.
This change carries the selected row positions through TableReader and
FileScanRequest, builds selective Parquet row ranges, seeks requested ORC rows,
and routes supported second-phase fetches through FileScannerV2. Table-format
variants that V2 does not support retain the existing V1 fallback.
### Release note
Support row-id fetch for Parquet and ORC in FileScannerV2.
### Check List (For Author)
- Test
- [x] Unit Test
- `ParquetScanTest.ReadsOnlyRequestedAbsoluteFileRowsAcrossRowGroups`
- `NewOrcReaderTest.ReadsOnlyRequestedAbsoluteFileRows`
- Behavior changed:
- [x] Yes. TopN two-phase materialization uses FileScannerV2 for
supported Parquet and ORC scans.
- Does this need documentation?
- [x] No.
### Check List (For Reviewer who merge this PR)
- [ ] Confirm the release note
- [ ] Confirm test cases
- [ ] Confirm document
- [ ] Add branch pick label
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