suxiaogang223 opened a new pull request, #64158:
URL: https://github.com/apache/doris/pull/64158
### What problem does this PR solve?
Issue Number: N/A
Related PR: N/A
Problem Summary: This refactors the new table/file reader column mapping
path to separate schema identifiers from reader-local and output indexes. The
change aligns Doris with DuckDB's multi-file reader model: ColumnDefinition now
carries typed identifiers, mapper modes interpret those identifiers once,
reader projection uses LocalColumnId/LocalColumnIndex, and nested filter
localization reuses the recursive mapping tree. It also documents the remaining
TVF Parquet nested BY_NAME mapping TODO for files without field ids.
### Release note
None
### Check List (For Author)
- Test: Manual test
- build-support/clang-format.sh on modified C++ files
- git diff --check
- BUILD_TYPE=DEBUG ./build.sh --be -j 16 on fedora
/home/socrates/code/doris
- build-support/check-format.sh attempted locally but local clang-format
is not version 16
- Behavior changed: No
- Does this need documentation: No
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