- 增加 DuckDB 数据库支持；

Providers/FreeSql.Provider.Duckdb/Curd/DuckdbDelete.cs

@@ -0,0 +1,26 @@
+using FreeSql.Internal;
+using System;
+using System.Collections.Generic;
+using System.Data;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace FreeSql.Duckdb.Curd
+{
+
+    class DuckdbDelete<T1> : Internal.CommonProvider.DeleteProvider<T1>
+    {
+        public DuckdbDelete(IFreeSql orm, CommonUtils commonUtils, CommonExpression commonExpression, object dywhere)
+            : base(orm, commonUtils, commonExpression, dywhere)
+        {
+        }
+
+        public override List<T1> ExecuteDeleted() => throw new NotImplementedException($"FreeSql.Provider.Duckdb {CoreStrings.S_Not_Implemented_Feature}");
+
+#if net40
+#else
+        public override Task<List<T1>> ExecuteDeletedAsync(CancellationToken cancellationToken = default) => throw new NotImplementedException($"FreeSql.Provider.Duckdb {CoreStrings.S_Not_Implemented_Feature}");
+#endif
+    }
+}