Implement deletion api

example/lib/example.dart

@@ -4,7 +4,7 @@ part 'example.g.dart';
 
 class Products extends Table {
 
-  IntColumn get id => integer().named("products_id").autoIncrement()();
+  IntColumn get id => integer().named('products_id').autoIncrement()();
   TextColumn get name => text()();
 
 }

sally/lib/src/runtime/executor/executor.dart

@@ -1,5 +1,6 @@
 import 'package:sally/sally.dart';
 import 'package:sally/src/runtime/executor/type_system.dart';
+import 'package:sally/src/runtime/statements/delete.dart';
 import 'package:sally/src/runtime/statements/select.dart';
 
 /// A base class for all generated databases.
@@ -13,6 +14,9 @@ abstract class GeneratedDatabase {
       TableInfo<Table, ReturnType> table) {
     return SelectStatement<Table, ReturnType>(this, table);
   }
+
+  DeleteStatement<Table> delete<Table>(TableInfo<Table, dynamic> table) =>
+      DeleteStatement<Table>(this, table);
 }
 
 abstract class QueryExecutor {

sally/lib/src/runtime/statements/delete.dart

@@ -0,0 +1,21 @@
+import 'package:sally/src/runtime/components/component.dart';
+import 'package:sally/src/runtime/executor/executor.dart';
+import 'package:sally/src/runtime/statements/query.dart';
+import 'package:sally/src/runtime/structure/table_info.dart';
+
+class DeleteStatement<UserTable> extends Query<UserTable> {
+  DeleteStatement(
+      GeneratedDatabase database, TableInfo<UserTable, dynamic> table)
+      : super(database, table);
+
+  @override
+  void writeStartPart(GenerationContext ctx) {
+    ctx.buffer.write('DELETE FROM ${table.$tableName}');
+  }
+
+  Future<int> go() async {
+    final ctx = constructQuery();
+
+    return await ctx.database.executor.runDelete(ctx.sql, ctx.boundVariables);
+  }
+}

sally/test/queries_test.dart

@@ -54,12 +54,12 @@ void main() {
     });
   });
 
-  /*
-  group("Generates DELETE statements", () {
-    test("without any constraints", () {
-      users.delete().performDelete();
 
-      verify(executor.executeDelete("DELETE FROM users ", argThat(isEmpty)));
+  group('Generates DELETE statements', () {
+    test('without any constraints', () {
+      db.delete(db.users).go();
+
+      verify(executor.runDelete('DELETE FROM users;', argThat(isEmpty)));
+    });
   });
-  });*/
 }