Purpose

No Linked issue.

Migrate bitmap file index implementation — the core secondary index for accelerating point lookups and equality filters:

Bitmap file index (src/paimon/common/file_index/bitmap/):

• BitmapFileIndex — bitmap-based file index reader/writer supporting equality and IN-list queries (bitmap_file_index.h/cpp)
• BitmapFileIndexMeta — abstract metadata describing bitmap index layout and column mappings (bitmap_file_index_meta.h/cpp)
• BitmapFileIndexMetaV1 — v1 metadata format with fixed-width bitmap entries (bitmap_file_index_meta_v1.h/cpp)
• BitmapFileIndexMetaV2 — v2 metadata format with variable-length entries and null bitmap support (bitmap_file_index_meta_v2.h/cpp)
• ApplyBitmapIndexBatchReader — batch reader that applies bitmap index filtering to row batches (apply_bitmap_index_batch_reader.h)
• BitmapIndexResult — bitmap-backed query result with intersection/union operations (bitmap_index_result.cpp)
• BitmapFileIndexFactory — factory for registering bitmap file index implementation (bitmap_file_index_factory.h/cpp)

Tests

• bitmap_file_index_test.cpp — end-to-end bitmap index write/read, equality/IN queries, multi-type support
• bitmap_file_index_meta_test.cpp — metadata serialization round-trip for v1 and v2 formats
• apply_bitmap_index_batch_reader_test.cpp — batch reader filtering with bitmap index
• bitmap_index_result_test.cpp — bitmap result set operations

API and Format

API and Format

Documentation

Generative AI tooling

Migrate-by: Aone Copilot (Claude)