2 commits

Author	SHA1	Message	Date
Alex Garcia	82f4eb08bf	Add NULL checks after sqlite3_column_blob in rescore and DiskANN ... sqlite3_column_blob() returns NULL for zero-length blobs or on OOM. Several call sites in rescore KNN and DiskANN node/vector read passed the result directly to memcpy without checking, risking NULL deref on corrupt or empty databases. IVF already had proper NULL checks. Adds corruption regression tests that truncate shadow table blobs and verify the query errors cleanly instead of crashing. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>	2026-03-31 14:31:49 -07:00
Alex Garcia	ba0db0b6d6	Add rescore index for ANN queries ... Add rescore index type: stores full-precision float vectors in a rowid-keyed shadow table, quantizes to int8 for fast initial scan, then rescores top candidates with original vectors. Includes config parser, shadow table management, insert/delete support, KNN integration, compile flag (SQLITE_VEC_ENABLE_RESCORE), fuzz targets, and tests.	2026-03-29 19:45:54 -07:00