feat(datafusion): expose hybrid search scores#519
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DataFusion hybrid search discarded fused scores, preventing queries from selecting the Spark-compatible search-score metadata column. Expose __paimon_search_score and materialize it by matching scan rows through _ROW_ID while preserving projection, empty-result, and row-tracking-only behavior. Signed-off-by: QuakeWang <wangfuzheng0814@foxmail.com>
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Purpose
DataFusion hybrid search currently discards the fused scores returned by
execute_scored, so queries cannot access the Spark-compatible__paimon_search_scoremetadata column.Brief change log
__paimon_search_scorefrom hybrid-search table functions._ROW_IDand append scores without exposing the internal row ID.Tests
cargo test -p paimon-datafusion physical_plan::search_score::testscargo test -p paimon-datafusion hybrid_search_testscargo test -p paimon-datafusion --features fulltext hybrid_search_testsAPI and Format
Adds the nullable
Float32metadata column__paimon_search_scoreto hybrid-search results. No storage-format change.Documentation
Updated the SQL documentation.