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knn_search

sqlite_graphrag::storage::memories

Function knn_search 

Source 
pub fn knn_search(
    conn: &Connection,
    embedding: &[f32],
    namespaces: &[String],
    memory_type: Option<&str>,
    k: usize,
) -> Result<Vec<(i64, f32)>, AppError>
Expand description

Runs a KNN search over vec_memories, optionally restricted to namespaces.

§Arguments

  • embedding — query vector of length crate::constants::EMBEDDING_DIM.
  • namespaces — namespaces to search. Empty slice means “all namespaces”.
  • memory_type — optional filter on the type column.
  • k — maximum number of hits to return.

§Returns

A vector of (memory_id, distance) pairs sorted by ascending distance.

§Errors

Returns Err(AppError::Database) on any rusqlite failure.