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Temporarily block vector UPDATE for DiskANN and IVF indexes

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vec0Update_UpdateVectorColumn writes to flat chunk blobs but does not
update DiskANN graph or IVF index structures, silently corrupting KNN
results. Now returns a clear error for these index types. Rescore
UPDATE is unaffected — it already has a full implementation that
updates both quantized chunks and float vectors.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Alex Garcia 2026-03-31 14:08:08 -07:00
parent 07f56e3cbe
commit 9df59b4c03
3 changed files with 35 additions and 12 deletions
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20
sqlite-vec.c
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@ -10055,6 +10055,26 @@ int vec0Update_Update(sqlite3_vtab *pVTab, int argc, sqlite3_value **argv) {
continue;
}
// Block vector UPDATE for index types that don't implement it —
// the DiskANN graph / IVF lists would become stale.
{
enum Vec0IndexType idx_type = p->vector_columns[vector_idx].index_type;
const char *idx_name = NULL;
if (idx_type == VEC0_INDEX_TYPE_DISKANN) idx_name = "DiskANN";
#if SQLITE_VEC_EXPERIMENTAL_IVF_ENABLE
else if (idx_type == VEC0_INDEX_TYPE_IVF) idx_name = "IVF";
#endif
if (idx_name) {
vtab_set_error(
&p->base,
"UPDATE on vector column \"%.*s\" is not supported for %s indexes.",
p->vector_columns[vector_idx].name_length,
p->vector_columns[vector_idx].name,
idx_name);
return SQLITE_ERROR;
}
}
rc = vec0Update_UpdateVectorColumn(p, chunk_id, chunk_offset, vector_idx,
valueVector, rowid);
if (rc != SQLITE_OK) {