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5a7ab6d427
Add TableStore::key_column_index_coverage — a metadata-only check (no IO) of whether a `key_col IN (...)` scan will be served by the persisted BTREE or silently fall back to a full filtered scan, mirroring Lance's own decision: no BTREE on the column, or any fragment missing physical_rows (which disables scalar indices for the whole scan, lance dataset/scanner.rs create_filter_plan). execute_expand_indexed calls it once per traversal and tracing::warn!s on Degraded, so the perf cliff is observable instead of hidden behind a bench oracle. Detection-only: results are correct either way (the scan returns all rows). Closes the "no silent failures" gap the traversal best-practice audit flagged as the top deviation, and adds an IndexCoverage value a future cost-based planner can consume. |
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| omnigraph | ||
| omnigraph-cli | ||
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