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fix(parquet): validate geospatial projection parameters - #1050
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October 22, 2026 03:03
Reject incompatible geometry/geography CRS and geography edge algorithms during projection. Resolve omitted Parquet CRS to OGC:CRS84 and include the field path in mismatch errors. Co-authored-by: Codex <codex@openai.com>
Extract common CRS normalization, parameter comparison, and mismatch reporting into a helper used by geometry and geography projection. Co-authored-by: Codex <codex@openai.com>
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Parquet projection currently accepts incompatible geometry/geography parameters, such as
geometry(EPSG:3857)read asgeometry(OGC:CRS84). WKB carries neither the CRS nor the geography edge algorithm, so this silently changes the meaning of the values.Validate CRS case-insensitively and require matching geography edge algorithms. Resolve omitted Parquet CRS to
OGC:CRS84and include the column path in mismatch errors. Add coverage for defaults, all five algorithms, independent parameter mismatches, and nested struct/list/map projection with an unselected sibling.Follow-up to #880, as discussed in #880 (comment). Aligns with the validation in apache/iceberg#17578.
Validation: current core CMake build passed; all 34 tests in
parquet_schema_test.ccpassed when compiled and linked directly against installed Arrow/Parquet 24.0.0 and GTest 1.17.0 with-Wall -Wextra -Werror. Both new regression tests fail against the unchanged projection implementation.clang-format --dry-run --Werrorandgit diff --checkpassed. The full bundle build and bundled Arrow 25 integration suite have not been run.