Method BuildKnnSql

Namespace

Qavren.Edge.VectorData

Assembly

Qavren.Edge.VectorData.dll

BuildKnnSql(bool, bool, bool)

The vec0 KNN query. The filter, when present, is pushed in as v.rowid IN (SELECT "_rowid" FROM <data table> WHERE ...): vec0's BestIndex claims a rowid IN (...) constraint with omit = 1 and ANDs the bitmap into the chunk validity bitmap before any distance is computed, so this is a true pre-filter and never degrades to a client-side pass.

public string BuildKnnSql(bool hasFilter, bool hasScoreThreshold, bool includeVectors)

Parameters

hasFilter bool

Emit the rowid pre-filter bracket, with FilterPlaceholder inside it.

hasScoreThreshold bool

Emit the $scoreThreshold bracket.

includeVectors bool

Project the stored vector.

Returns

string

The query.