add option to inject a sql.DB instance

factory.go

@@ -79,3 +79,16 @@ func newSqliteExporter(cfg *Config) (*sqliteExporter, error) {
 func NewSqliteSDKTraceExporter(cfg *Config) (sdktrace.SpanExporter, error) {
 	return newSqliteExporter(cfg)
 }
+
+func NewSqliteSDKTraceExporterWithDB(db *sql.DB) (sdktrace.SpanExporter, error) {
+	tx, _ := db.Begin()
+	defer tx.Commit()
+
+	if _, err := tx.Exec(initScript); err != nil {
+		return nil, fmt.Errorf("failed to run migrations: %w", err)
+	}
+
+	return &sqliteExporter{
+		db: db,
+	}, nil
+}