## v0.9.17 (ODBC)

- 增加 FreeSql.Provider.Odbc，实现 Oracle/SqlServer/MySql 的 Odbc 访问提供；
- 增加 FreeSqlBuilder.UseConnectionString 参数 providerType，可解决因包版本冲突时，可能无法反射获得 FreeSql.Provider 对应的类型，通常这个参数不需要设置；
- 优化 MaxLength 特性，当指定为 -1 时 DbType 会分别映射类型 text/nvarchar(max)/nvarchar2(4000)；

FreeSql.Tests/FreeSql.Tests.Provider.Odbc/SqlServer/SqlServerAdo/SqlServerAdoTest.cs

@@ -0,0 +1,96 @@
+using FreeSql.DataAnnotations;
+using System;
+using System.Data.Odbc;
+using Xunit;
+
+namespace FreeSql.Tests.Odbc.SqlServer
+{
+    [Collection("SqlServerCollection")]
+    public class SqlServerAdoTest
+    {
+        [Fact]
+        public void Pool()
+        {
+            var t1 = g.sqlserver.Ado.MasterPool.StatisticsFullily;
+        }
+
+        [Fact]
+        public void SlavePools()
+        {
+            var t2 = g.sqlserver.Ado.SlavePools.Count;
+        }
+
+        [Fact]
+        public void ExecuteReader()
+        {
+
+        }
+        [Fact]
+        public void ExecuteArray()
+        {
+
+        }
+        [Fact]
+        public void ExecuteNonQuery()
+        {
+
+        }
+        [Fact]
+        public void ExecuteScalar()
+        {
+
+        }
+
+        [Fact]
+        public void Query()
+        {
+
+            //var tt1 = g.sqlserver.Select<xxx>()
+            //	.LeftJoin(a => a.ParentId == a.Parent.Id)
+            //	.ToSql(a => new { a.Id, a.Title });
+
+            //var tt2result = g.sqlserver.Select<xxx>()
+            //	.LeftJoin(a => a.ParentId == a.Parent.Id)
+            //	.ToList(a => new { a.Id, a.Title });
+
+            //var tt = g.sqlserver.Select<xxx>()
+            //	.LeftJoin<xxx>((a, b) => b.Id == a.Id)
+            //	.ToSql(a => new { a.Id, a.Title });
+
+            //var ttresult = g.sqlserver.Select<xxx>()
+            //	.LeftJoin<xxx>((a, b) => b.Id == a.Id)
+            //	.ToList(a => new { a.Id, a.Title });
+
+            var tnsql1 = g.sqlserver.Select<xxx>().Where(a => a.Id > 0).Where(b => b.Title != null).Page(1, 3).ToSql(a => a.Id);
+            var tnsql2 = g.sqlserver.Select<xxx>().Where(a => a.Id > 0).Where(b => b.Title != null).Page(2, 3).ToSql(a => a.Id);
+
+            var tn1 = g.sqlserver.Select<xxx>().Where(a => a.Id > 0).Where(b => b.Title != null).Page(1, 3).ToList(a => a.Id);
+            var tn2 = g.sqlserver.Select<xxx>().Where(a => a.Id > 0).Where(b => b.Title != null).Page(2, 3).ToList(a => a.Id);
+
+            var t3 = g.sqlserver.Ado.Query<xxx>("select * from xxx");
+
+            var t4 = g.sqlserver.Ado.Query<(int, int, string, string DateTime)>("select * from xxx");
+
+            var t5 = g.sqlserver.Ado.Query<dynamic>(System.Data.CommandType.Text, "select * from xxx where Id = ?",
+                new OdbcParameter("@Id", 1));
+        }
+
+        [Fact]
+        public void QueryMultipline()
+        {
+            var tnsql1 = g.sqlserver.Select<xxx>().Where(a => a.Id > 0).Where(b => b.Title != null).Page(1, 3).ToSql(a => a.Id);
+
+            var t3 = g.sqlserver.Ado.Query<xxx, (int, string, string), dynamic>("select * from xxx; select * from xxx; select * from xxx");
+        }
+
+        class xxx
+        {
+            public int Id { get; set; }
+            public int ParentId { get; set; }
+            public xxx Parent { get; set; }
+            public string Title { get; set; }
+            public string Url { get; set; }
+            public DateTime Create_time { get; set; }
+        }
+    }
+}