Change open DB to be synchronous

Author: mugikhan

example/custom_functions_example.dart

@@ -11,8 +11,8 @@ class TestOpenFactory extends DefaultSqliteOpenFactory {
   TestOpenFactory({required super.path, super.sqliteOptions});
 
   @override
-  FutureOr<CommonDatabase> open(SqliteOpenOptions options) async {
-    final db = await super.open(options);
+  CommonDatabase open(SqliteOpenOptions options) {
+    final db = super.open(options);
 
     db.createFunction(
       functionName: 'sleep',

example/linux_cli_example.dart

@@ -17,7 +17,7 @@ class TestOpenFactory extends DefaultSqliteOpenFactory {
       this.sqlitePath = defaultSqlitePath});
 
   @override
-  FutureOr<CommonDatabase> open(SqliteOpenOptions options) async {
+  CommonDatabase open(SqliteOpenOptions options) {
     // For details, see:
     // https://pub.dev/packages/sqlite3#manually-providing-sqlite3-libraries
     sqlite_open.open.overrideFor(sqlite_open.OperatingSystem.linux, () {

lib/src/common/abstract_open_factory.dart

@@ -15,7 +15,7 @@ abstract class SqliteOpenFactory<Database extends sqlite.CommonDatabase> {
   String get path;
 
   /// Opens a direct connection to the SQLite database
-  FutureOr<Database> open(SqliteOpenOptions options);
+  Database open(SqliteOpenOptions options);
 
   /// Opens an asynchronous [SqliteConnection]
   FutureOr<SqliteConnection> openConnection(SqliteOpenOptions options);
@@ -77,14 +77,14 @@ abstract class AbstractDefaultSqliteOpenFactory<
   @protected
 
   /// Opens a direct connection to a SQLite database connection
-  FutureOr<Database> openDB(SqliteOpenOptions options);
+  Database openDB(SqliteOpenOptions options);
 
   @override
 
   /// Opens a direct connection to a SQLite database connection
   /// and executes setup pragma statements to initialize the DB
-  FutureOr<Database> open(SqliteOpenOptions options) async {
-    var db = await openDB(options);
+  Database open(SqliteOpenOptions options) {
+    var db = openDB(options);
 
     // Pragma statements don't have the same BUSY_TIMEOUT behavior as normal statements.
     // We add a manual retry loop for those.

test/utils/native_test_utils.dart

@@ -21,11 +21,11 @@ class TestSqliteOpenFactory extends TestDefaultSqliteOpenFactory {
       initStatements});
 
   @override
-  FutureOr<CommonDatabase> open(SqliteOpenOptions options) async {
+  CommonDatabase open(SqliteOpenOptions options) {
     sqlite_open.open.overrideFor(sqlite_open.OperatingSystem.linux, () {
       return DynamicLibrary.open(sqlitePath);
     });
-    final db = await super.open(options);
+    final db = super.open(options);
 
     db.createFunction(
       functionName: 'test_sleep',