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5810974b37
Geneva Table.load_columns() parity on the REST-only client. Fills existing
columns from an external Parquet/Lance/IPC source by primary-key join.
- BaseTable::load_columns default (NotSupported) + public Table::load_columns,
taking a LoadColumnsRequest (source uris/format/storage_options, target/source
key, (target, source?) column mappings, on_missing, worker/batch/commit knobs).
- Remote impl POSTs to /v1/table/{id}/load_columns with the matching body;
mock test asserts the request shape.
- PyO3 binding + Python remote Table.load_columns(source, pk, columns, *,
source_format, source_pk, on_missing, ...) accepting a column list or
{target: source} dict.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>