start simple examples

examples/simple-bun/demo.ts

@@ -0,0 +1,49 @@
+import { Database } from "bun:sqlite";
+
+Database.setCustomSQLite("/usr/local/opt/sqlite3/lib/libsqlite3.dylib");
+
+const db = new Database(":memory:");
+//sqliteVec.load(db);
+db.loadExtension("../../dist/vec0");
+
+const { sqlite_version, vec_version } = db
+  .prepare(
+    "select sqlite_version() as sqlite_version, vec_version() as vec_version;"
+  )
+  .get();
+
+console.log(`sqlite_version=${sqlite_version}, vec_version=${vec_version}`);
+
+db.exec("CREATE VIRTUAL TABLE vec_items USING vec0(embedding float[8])");
+
+const insertStmt = db.prepare(
+  "INSERT INTO vec_items(rowid, embedding) VALUES (?, vec_f32(?))"
+);
+
+const insertVectors = db.transaction((items) => {
+  for (const [id, vector] of items) {
+    insertStmt.run(BigInt(id), vector);
+  }
+});
+
+insertVectors([
+  [1, new Float32Array([0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8])],
+  [2, new Float32Array([0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8])],
+]);
+
+const query = new Float32Array([0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8]);
+const rows = db
+  .prepare(
+    `
+  SELECT
+    rowid,
+    distance
+  FROM vec_items
+  WHERE embedding MATCH ?
+  ORDER BY distance
+  LIMIT 5
+`
+  )
+  .all(query);
+
+console.log(rows);