suxiaogang223 opened a new pull request, #64357:
URL: https://github.com/apache/doris/pull/64357
### What problem does this PR solve?
Issue Number: None
Related PR: None
Problem Summary: The new parquet reader needs one complete path for nested
complex types instead of separate legacy top-level LIST/MAP handling. This PR
defines the nested shape/value contract, keeps nested predicate pushdown scoped
to STRUCT/nested STRUCT, adds recursive reader composition for LIST, MAP,
STRUCT, and scalar leaves, removes the old complex reader fallback paths, and
adds unit coverage for deep nested shapes with null and empty levels.
### Release note
None
### Check List (For Author)
- Test: Unit Test
- Remote fedora: ./run-be-ut.sh -j 8 --run
--filter="ParquetColumnReaderTest.*"
- Remote fedora: ./run-be-ut.sh -j 8 --run
--filter="NewParquetReaderTest.*"
- Behavior changed: No
- Does this need documentation: Yes
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