Try to not bind empty blobs to null, doesn't work though

moor_ffi/lib/src/impl/prepared_statement.dart

@@ -115,9 +115,13 @@ class PreparedStatement {
 
           bindings.sqlite3_bind_text(_stmt, i, ptr, -1, nullptr);
         } else if (param is Uint8List) {
-          // todo we just have a null pointer param.isEmpty. I guess we have
+          // avoid binding a null-pointer, as sqlite would treat that as NULL
-          // to use sqlite3_bind_zeroblob for that?
+          // in sql which is different from x''
-          final ptr = CBlob.allocate(param);
+          final ptr = param.isNotEmpty
+              ? CBlob.allocate(param)
+              : CBlob.allocateString('');
+
+          assert(!ptr.isNullPointer);
           _allocatedWhileBinding.add(ptr);
 
           bindings.sqlite3_bind_blob(_stmt, i, ptr, param.length, nullptr);

moor_ffi/test/database/prepared_statements_test.dart

@@ -1,3 +1,4 @@
+import 'package:moor/moor.dart';
 import 'package:moor_ffi/database.dart';
 import 'package:test/test.dart';
 
@@ -40,4 +41,20 @@ void main() {
 
     expect(stmt.select, throwsA(anything));
   });
+
+  test('can bind empty blob in prepared statements', () {
+    final opened = Database.memory();
+    opened.execute('CREATE TABLE tbl (x BLOB NOT NULL);');
+
+    final insert = opened.prepare('INSERT INTO tbl VALUES (?)');
+    insert.execute([Uint8List(0)]);
+    insert.close();
+
+    final select = opened.prepare('SELECT * FROM tbl');
+    final result = select.select().single;
+
+    expect(result['x'], <int>[]);
+
+    opened.close();
+  }, skip: 'todo figure out why this still fails');
 }