- 修复 Ado.Query 查询字段重复时报错；#162 #165 #161 - 增加 FreeSql.Provider.MsAccess 支持 Access 数据库操作，已通过 2003/2007 版本测试；

2025-06-18 20:08:15 +08:00 · 2019-12-24 06:16:52 +08:00
parent d5ed1c8a30
commit a92c279c72
69 changed files with 10380 additions and 207 deletions
--- a/Providers/FreeSql.Provider.MsAccess/Curd/MsAccessUpdate.cs
+++ b/Providers/FreeSql.Provider.MsAccess/Curd/MsAccessUpdate.cs
@ -0,0 +1,79 @@
+using FreeSql.Internal;
+using FreeSql.Internal.Model;
+using System;
+using System.Collections.Generic;
+using System.Data;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace FreeSql.MsAccess.Curd
+{
+
+    class MsAccessUpdate<T1> : Internal.CommonProvider.UpdateProvider<T1> where T1 : class
+    {
+
+        public MsAccessUpdate(IFreeSql orm, CommonUtils commonUtils, CommonExpression commonExpression, object dywhere)
+            : base(orm, commonUtils, commonExpression, dywhere)
+        {
+            _batchAutoTransaction = false;
+        }
+
+        //蛋疼的 access 更新只能一条一条执行，不支持 case .. when .. then .. end，也不支持事务
+        public override int ExecuteAffrows() => base.SplitExecuteAffrows(1, 1000);
+        public override List<T1> ExecuteUpdated() => base.SplitExecuteUpdated(1, 1000);
+
+        public override IUpdate<T1> BatchOptions(int rowsLimit, int parameterLimit, bool autoTransaction = true) =>
+            throw new NotImplementedException("蛋疼的 access 插入只能一条一条执行，不支持 values(..),(..) 也不支持 select .. UNION ALL select ..");
+
+        protected override List<T1> RawExecuteUpdated()
+        {
+            throw new NotImplementedException();
+        }
+
+        protected override void ToSqlCase(StringBuilder caseWhen, ColumnInfo[] primarys)
+        {
+            if (_table.Primarys.Length == 1)
+            {
+                caseWhen.Append(_commonUtils.QuoteReadColumn(_table.Primarys.First().Attribute.MapType, _commonUtils.QuoteSqlName(_table.Primarys.First().Attribute.Name)));
+                return;
+            }
+            caseWhen.Append("(");
+            var pkidx = 0;
+            foreach (var pk in _table.Primarys)
+            {
+                if (pkidx > 0) caseWhen.Append(", ");
+                caseWhen.Append(MsAccessUtils.GetCastSql(_commonUtils.QuoteReadColumn(_table.Primarys.First().Attribute.MapType, _commonUtils.QuoteSqlName(pk.Attribute.Name)), typeof(string)));
+                ++pkidx;
+            }
+            caseWhen.Append(")");
+        }
+
+        protected override void ToSqlWhen(StringBuilder sb, ColumnInfo[] primarys, object d)
+        {
+            if (_table.Primarys.Length == 1)
+            {
+                sb.Append(_commonUtils.FormatSql("{0}", _table.Primarys.First().GetMapValue(d)));
+                return;
+            }
+            var pkidx = 0;
+            foreach (var pk in _table.Primarys)
+            {
+                if (pkidx > 0) sb.Append(", ");
+                sb.Append(MsAccessUtils.GetCastSql(_commonUtils.FormatSql("{0}", pk.GetMapValue(d)), typeof(string)));
+                ++pkidx;
+            }
+        }
+
+#if net40
+#else
+        public override Task<int> ExecuteAffrowsAsync() => base.SplitExecuteAffrowsAsync(500, 2100);
+        public override Task<List<T1>> ExecuteUpdatedAsync() => base.SplitExecuteUpdatedAsync(500, 2100);
+
+        protected override Task<List<T1>> RawExecuteUpdatedAsync()
+        {
+            throw new NotImplementedException();
+        }
+#endif
+    }
+}