Struct SQLiteBackend 

pub struct SQLiteBackend { /* private fields */ }

Implementations

impl SQLiteBackend

pub fn new(dsn_env: String) -> Self

impl SQLiteBackend

pub async fn connect(&self) -> Result<SqliteConn>

Open a connection to the configured DB. Reads the path from the env var at the moment of the call (mirrors Python). Sets WAL on best-effort. Idempotent at the auto-extension level — sqlite-vec is registered once per process via OnceLock.

pub async fn table_exists( &self, conn: &SqliteConn, _db: &str, table: &str, ) -> Result<bool>

Mirrors Python’s table_exists — checks sqlite_master for table or virtual table by name. The db argument is dropped (no schemas).

pub async fn embedding_dim( &self, conn: &SqliteConn, _db: &str, table: &str, ) -> Result<Option<usize>>

Read the FLOAT[N] dim from the vec0 partner table’s CREATE statement in sqlite_master. Returns None when the partner table doesn’t exist or doesn’t have a FLOAT[N] column.

pub async fn with_create_lock( &self, _conn: &SqliteConn, _key: &str, ) -> Result<()>

SQLite has no advisory-lock primitive. Mirror Python’s no-op.

Trait Implementations

impl BackendDialect for SQLiteBackend

const NAME: &'static str = "sqlite"

const SUPPORTS_UPSERT: bool = true

fn quote_ident(&self, name: &str) -> String

fn fq_table(&self, _db: &str, table: &str) -> String

fn vector_type_ddl(&self, dim: usize) -> String

fn json_type_ddl(&self) -> String

fn tags_array_type_ddl(&self) -> String

fn text_pk_type_ddl(&self) -> String

fn timestamp_now_default_ddl(&self) -> String

fn vector_literal(&self, arr: &[f32]) -> String

fn json_literal(&self, obj: &Value) -> String

fn json_path_sql(&self, col_expr: &str, dotted_path: &str) -> String

fn upsert_clause(&self, key_cols: &[&str], update_cols: &[&str]) -> String

fn create_database_sql(&self, _name: &str) -> String

fn add_column_if_not_exists_sql( &self, fq: &str, col: &str, type_ddl: &str, ) -> String

fn drop_table_sql(&self, fq: &str) -> String

fn emit_chunks_table_ddl( &self, fq: &str, cols: &[ColSpec], _hnsw: bool, dim: usize, _engine: Option<&str>, _vector_metric: Option<&str>, ) -> Vec<String>

impl Clone for SQLiteBackend

fn clone(&self) -> SQLiteBackend

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.