- 增加 DuckDB 数据库支持；

FreeSql.Tests/FreeSql.Tests.Provider.Duckdb/g.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Text;
+using System.Threading;
+
+public class g
+{
+    static Lazy<IFreeSql> duckdbLazy = new Lazy<IFreeSql>(() =>
+    {
+        return new FreeSql.FreeSqlBuilder()
+            .UseConnectionString(FreeSql.DataType.DuckDB, "DataSource=duckdb01.db")
+            .UseAutoSyncStructure(true)
+            .UseNameConvert(FreeSql.Internal.NameConvertType.ToLower)
+            .UseMonitorCommand(
+                cmd => Trace.WriteLine("\r\n线程" + Thread.CurrentThread.ManagedThreadId + ": " + cmd.CommandText) //监听SQL命令对象，在执行前
+                //, (cmd, traceLog) => Console.WriteLine(traceLog)
+                )
+            .Build();
+    });
+    public static IFreeSql duckdb => duckdbLazy.Value;
+}