- 增加 Oracle/达梦 批量更新 BulkCopy 扩展方法；

FreeSql.Tests/FreeSql.Tests/Oracle/Curd/OracleInsertTest.cs

@@ -1,4 +1,4 @@
-using FreeSql.DataAnnotations;
+using FreeSql.DataAnnotations;
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -235,13 +235,16 @@ INTO ""TB_TOPIC_INSERT""(""CLICKS"") VALUES(:Clicks_9)
         public void ExecuteOracleBulkCopy()
         {
             var items = new List<Topic_bulkcopy>();
-            for (var a = 0; a < 10; a++) items.Add(new Topic_bulkcopy { Title = $"newtitle{a}", Clicks = a * 100, CreateTime = DateTime.Now });
+            for (var a = 0; a < 100; a++) items.Add(new Topic_bulkcopy { Title = $"newtitle{a}", Clicks = a * 100, CreateTime = DateTime.Now });
 
+            g.oracle.Delete<Topic_bulkcopy>().Where("1=1").ExecuteAffrows();
             g.oracle.Insert<Topic_bulkcopy>().AppendData(items).InsertIdentity().ExecuteOracleBulkCopy();
             //insert.AppendData(items).IgnoreColumns(a => new { a.CreateTime, a.Clicks }).ExecuteSqlBulkCopy();
             // System.NotSupportedException:“DataSet does not support System.Nullable<>.”
+
+            g.oracle.Update<Topic_bulkcopy>().SetSource(items).ExecuteOracleBulkCopy();
         }
-        [Table(Name = "tb_topic_bulkcopy")]
+        [Table(Name = "tb_topic_bk1")]
         class Topic_bulkcopy
         {
             public Guid Id { get; set; }

FreeSql/Internal/CommonProvider/UpdateProvider.cs

@@ -71,6 +71,15 @@ namespace FreeSql.Internal.CommonProvider
                         .AsTable(state.Item4);
                     (insert as InsertProvider)._isAutoSyncStructure = false;
                     funcBulkCopy(insert);
+                    switch (fsql.Ado.DataType)
+                    {
+                        case DataType.Oracle:
+                        case DataType.OdbcOracle:
+                        case DataType.CustomOracle:
+                        case DataType.Dameng:
+                        case DataType.OdbcDameng:
+                            return fsql.Ado.CommandFluent(state.Item2).WithConnection(connection).WithTransaction(transaction).ExecuteNonQuery();
+                    }
                     var affrows = fsql.Ado.CommandFluent(state.Item2 + ";\r\n" + state.Item3).WithConnection(connection).WithTransaction(transaction).ExecuteNonQuery();
                     droped = true;
                     return affrows;

Providers/FreeSql.Provider.Dameng/DamengExtensions.cs

@@ -1,6 +1,11 @@
 using Dm;
 using FreeSql;
+using FreeSql.Internal.CommonProvider;
+using FreeSql.Internal.Model;
 using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
 
 public static partial class FreeSqlDamengGlobalExtensions
 {
@@ -15,6 +20,58 @@ public static partial class FreeSqlDamengGlobalExtensions
     static FreeSql.Dameng.DamengAdo _damengAdo = new FreeSql.Dameng.DamengAdo();
 
     #region ExecuteDmBulkCopy
+
+    /// <summary>
+    /// 批量更新（更新字段数量超过 2000 时收益大）<para></para>
+    /// 实现原理：使用 OracleBulkCopy 插入临时表，再使用 MERGE INTO 联表更新
+    /// </summary>
+    /// <typeparam name="T"></typeparam>
+    /// <param name="that"></param>
+    /// <returns></returns>
+    public static int ExecuteDmBulkCopy<T>(this IUpdate<T> that) where T : class
+    {
+        var update = that as UpdateProvider<T>;
+        if (update._source.Any() != true || update._tempPrimarys.Any() == false) return 0;
+        var state = ExecuteDmBulkCopyState(update);
+        return UpdateProvider.ExecuteBulkUpdate(update, state, insert => insert.ExecuteDmBulkCopy());
+    }
+    static NativeTuple<string, string, string, string, string[]> ExecuteDmBulkCopyState<T>(UpdateProvider<T> update) where T : class
+    {
+        if (update._source.Any() != true) return null;
+        var _table = update._table;
+        var _commonUtils = update._commonUtils;
+        var updateTableName = update._tableRule?.Invoke(_table.DbName) ?? _table.DbName;
+        var tempTableName = $"Temp_{Guid.NewGuid().ToString("N").ToUpper().Substring(0, 24)}";
+        if (update._orm.CodeFirst.IsSyncStructureToLower) tempTableName = tempTableName.ToLower();
+        if (update._orm.CodeFirst.IsSyncStructureToUpper) tempTableName = tempTableName.ToUpper();
+        if (update._connection == null && update._orm.Ado.TransactionCurrentThread != null)
+            update.WithTransaction(update._orm.Ado.TransactionCurrentThread);
+        var sb = new StringBuilder().Append("CREATE GLOBAL TEMPORARY TABLE ").Append(_commonUtils.QuoteSqlName(tempTableName)).Append(" ( ");
+        var setColumns = new List<string>();
+        var pkColumns = new List<string>();
+        foreach (var col in _table.Columns.Values)
+        {
+            if (update._tempPrimarys.Any(a => a.CsName == col.CsName)) pkColumns.Add(col.Attribute.Name);
+            else if (col.Attribute.IsIdentity == false && col.Attribute.IsVersion == false && update._ignore.ContainsKey(col.Attribute.Name) == false) setColumns.Add(col.Attribute.Name);
+            else continue;
+            sb.Append(" \r\n  ").Append(_commonUtils.QuoteSqlName(col.Attribute.Name)).Append(" ").Append(col.Attribute.DbType.Replace("NOT NULL", ""));
+            sb.Append(",");
+        }
+        var sql1 = sb.Remove(sb.Length - 1, 1).Append("\r\n) ON COMMIT PRESERVE ROWS").ToString();
+
+        sb.Clear().Append("MERGE INTO ").Append(_commonUtils.QuoteSqlName(updateTableName)).Append(" a ")
+            .Append(" \r\nUSING ").Append(_commonUtils.QuoteSqlName(tempTableName)).Append(" b ON (").Append(string.Join(" AND ", pkColumns.Select(col => $"a.{_commonUtils.QuoteSqlName(col)} = b.{_commonUtils.QuoteSqlName(col)}")))
+                    .Append(") \r\nWHEN MATCHED THEN")
+                    .Append(" \r\nUPDATE SET ").Append(string.Join(", \r\n  ", setColumns.Select(col => $"{_commonUtils.QuoteSqlName(col)} = b.{_commonUtils.QuoteSqlName(col)}")));
+        var sql2 = sb.ToString();
+        sb.Clear();
+        var sql3 = $"BEGIN \r\n" +
+            $"execute immediate 'TRUNCATE TABLE {_commonUtils.QuoteSqlName(tempTableName)}';\r\n" +
+            $"execute immediate 'DROP TABLE {_commonUtils.QuoteSqlName(tempTableName)}';\r\n" +
+            $"END;";
+        return NativeTuple.Create(sql1, sql2, sql3, tempTableName, pkColumns.Concat(setColumns).ToArray());
+    }
+
     /// <summary>
     /// 达梦 CopyBulk 批量插入功能<para></para>
     /// 使用 IgnoreColumns/InsertColumns 设置忽略/指定导入的列<para></para>

Providers/FreeSql.Provider.Oracle/OracleExtensions.cs

@@ -1,10 +1,15 @@
 using FreeSql;
+using FreeSql.Internal.CommonProvider;
+using FreeSql.Internal.Model;
 #if oledb
 using System.Data.OleDb;
 #else
 using Oracle.ManagedDataAccess.Client;
 #endif
 using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
 
 public static partial class FreeSqlOracleGlobalExtensions
 {
@@ -21,6 +26,57 @@ public static partial class FreeSqlOracleGlobalExtensions
 #if oledb
 #else
     #region ExecuteOracleBulkCopy
+    /// <summary>
+    /// 批量更新（更新字段数量超过 2000 时收益大）<para></para>
+    /// 实现原理：使用 OracleBulkCopy 插入临时表，再使用 MERGE INTO 联表更新
+    /// </summary>
+    /// <typeparam name="T"></typeparam>
+    /// <param name="that"></param>
+    /// <returns></returns>
+    public static int ExecuteOracleBulkCopy<T>(this IUpdate<T> that) where T : class
+    {
+        var update = that as UpdateProvider<T>;
+        if (update._source.Any() != true || update._tempPrimarys.Any() == false) return 0;
+        var state = ExecuteOracleBulkCopyState(update);
+        return UpdateProvider.ExecuteBulkUpdate(update, state, insert => insert.ExecuteOracleBulkCopy());
+    }
+    static NativeTuple<string, string, string, string, string[]> ExecuteOracleBulkCopyState<T>(UpdateProvider<T> update) where T : class
+    {
+        if (update._source.Any() != true) return null;
+        var _table = update._table;
+        var _commonUtils = update._commonUtils;
+        var updateTableName = update._tableRule?.Invoke(_table.DbName) ?? _table.DbName;
+        var tempTableName = $"Temp_{Guid.NewGuid().ToString("N").ToUpper().Substring(0, 24)}";
+        if (update._orm.CodeFirst.IsSyncStructureToLower) tempTableName = tempTableName.ToLower();
+        if (update._orm.CodeFirst.IsSyncStructureToUpper) tempTableName = tempTableName.ToUpper();
+        if (update._connection == null && update._orm.Ado.TransactionCurrentThread != null)
+            update.WithTransaction(update._orm.Ado.TransactionCurrentThread);
+        var sb = new StringBuilder().Append("CREATE GLOBAL TEMPORARY TABLE ").Append(_commonUtils.QuoteSqlName(tempTableName)).Append(" ( ");
+        var setColumns = new List<string>();
+        var pkColumns = new List<string>();
+        foreach (var col in _table.Columns.Values)
+        {
+            if (update._tempPrimarys.Any(a => a.CsName == col.CsName)) pkColumns.Add(col.Attribute.Name);
+            else if (col.Attribute.IsIdentity == false && col.Attribute.IsVersion == false && update._ignore.ContainsKey(col.Attribute.Name) == false) setColumns.Add(col.Attribute.Name);
+            else continue;
+            sb.Append(" \r\n  ").Append(_commonUtils.QuoteSqlName(col.Attribute.Name)).Append(" ").Append(col.Attribute.DbType.Replace("NOT NULL", ""));
+            sb.Append(",");
+        }
+        var sql1 = sb.Remove(sb.Length - 1, 1).Append("\r\n) ON COMMIT PRESERVE ROWS").ToString();
+
+        sb.Clear().Append("MERGE INTO ").Append(_commonUtils.QuoteSqlName(updateTableName)).Append(" a ")
+            .Append(" \r\nUSING ").Append(_commonUtils.QuoteSqlName(tempTableName)).Append(" b ON (").Append(string.Join(" AND ", pkColumns.Select(col => $"a.{_commonUtils.QuoteSqlName(col)} = b.{_commonUtils.QuoteSqlName(col)}")))
+                    .Append(") \r\nWHEN MATCHED THEN")
+                    .Append(" \r\nUPDATE SET ").Append(string.Join(", \r\n  ", setColumns.Select(col => $"{_commonUtils.QuoteSqlName(col)} = b.{_commonUtils.QuoteSqlName(col)}")));
+        var sql2 = sb.ToString();
+        sb.Clear();
+        var sql3 = $"BEGIN \r\n" +
+            $"execute immediate 'TRUNCATE TABLE {_commonUtils.QuoteSqlName(tempTableName)}';\r\n" +
+            $"execute immediate 'DROP TABLE {_commonUtils.QuoteSqlName(tempTableName)}';\r\n" +
+            $"END;";
+        return NativeTuple.Create(sql1, sql2, sql3, tempTableName, pkColumns.Concat(setColumns).ToArray());
+    }
+
     /// <summary>
     /// Oracle CopyBulk 批量插入功能<para></para>
     /// 使用 IgnoreColumns/InsertColumns 设置忽略/指定导入的列<para></para>