pgsql/mysql/sqlserver适配

FreeSql/SqlServer/Curd/SqlServerDelete.cs

@@ -0,0 +1,34 @@
+using FreeSql.Internal;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace FreeSql.SqlServer.Curd {
+
+	class SqlServerDelete<T1> : Internal.CommonProvider.DeleteProvider<T1> where T1 : class {
+		public SqlServerDelete(IFreeSql orm, CommonUtils commonUtils, CommonExpression commonExpression, object dywhere)
+			: base(orm, commonUtils, commonExpression, dywhere) {
+		}
+
+		public override List<T1> ExecuteDeleted() {
+			var sql = this.ToSql();
+			if (string.IsNullOrEmpty(sql)) return new List<T1>();
+
+			var sb = new StringBuilder();
+			sb.Append(" OUTPUT ");
+			var colidx = 0;
+			foreach (var col in _table.Columns.Values) {
+				if (colidx > 0) sb.Append(", ");
+				sb.Append("DELETED.").Append(_commonUtils.QuoteSqlName(col.Attribute.Name)).Append(" as ").Append(_commonUtils.QuoteSqlName(col.CsName));
+				++colidx;
+			}
+
+			var validx = sql.IndexOf(" WHERE ");
+			if (validx == -1) throw new ArgumentException("找不到 WHERE ");
+			sb.Insert(0, sql.Substring(0, validx));
+			sb.Append(sql.Substring(validx));
+
+			return _orm.Ado.Query<T1>(sb.ToString());
+		}
+	}
+}