134 lines
5.4 KiB
C#
134 lines
5.4 KiB
C#
#region MIT license
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//
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// MIT license
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//
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// Copyright (c) 2007-2008 Jiri Moudry, Pascal Craponne
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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//
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#endregion
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using System;
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using System.Linq;
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using System.Reflection;
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using System.Data.SqlClient;
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using System.Collections.Generic;
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using System.Text;
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using System.Data;
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using System.Data.Linq.Mapping;
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using DbLinq.Data.Linq;
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using DbLinq.Data.Linq.SqlClient;
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using DbLinq.Util;
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using DbLinq.Vendor;
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#if MONO_STRICT
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using DataContext = System.Data.Linq.DataContext;
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using DataLinq = System.Data.Linq;
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using ITable = System.Data.Linq.ITable;
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using System.Data.Linq.SqlClient;
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#else
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using DataContext = DbLinq.Data.Linq.DataContext;
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using DataLinq = DbLinq.Data.Linq;
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using ITable = DbLinq.Data.Linq.ITable;
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using DbLinq.Data.Linq.SqlClient;
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#endif
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namespace DbLinq.SqlServer
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{
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[Vendor(typeof(SqlServerProvider), typeof(Sql2000Provider), typeof(Sql2005Provider))]
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#if !MONO_STRICT
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public
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#endif
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class SqlServerVendor : Vendor.Implementation.Vendor
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{
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public override string VendorName { get { return "SqlServer"; } }
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protected readonly SqlServerSqlProvider sqlProvider = new SqlServerSqlProvider();
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public override ISqlProvider SqlProvider { get { return sqlProvider; } }
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protected override void AppendServer(StringBuilder connectionString, string host)
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{
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// As per http://www.connectionstrings.com/sql-server,
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// port numbers are separated from host names via comma
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AppendConnectionString(connectionString, ConnectionStringServer, host.Replace(':', ','));
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}
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//NOTE: for Oracle, we want to consider 'Array Binding'
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//http://download-west.oracle.com/docs/html/A96160_01/features.htm#1049674
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/// <summary>
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/// for large number of rows, we want to use BULK INSERT,
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/// because it does not fill up the translation log.
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/// This is enabled for tables where Vendor.UserBulkInsert[db.Table] is true.
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/// </summary>
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public override void BulkInsert<T>(DataLinq.Table<T> table, List<T> rows, int pageSize, IDbTransaction transaction)
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{
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//use TableLock for speed:
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var bulkCopy = new SqlBulkCopy((SqlConnection)transaction.Connection, SqlBulkCopyOptions.TableLock, null);
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bulkCopy.DestinationTableName = table.Context.Mapping.GetTable(typeof(T)).TableName;
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//bulkCopy.SqlRowsCopied += new SqlRowsCopiedEventHandler(bulkCopy_SqlRowsCopied);
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var dt = new DataTable();
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//KeyValuePair<PropertyInfo, ColumnAttribute>[] columns = AttribHelper.GetColumnAttribs2(typeof(T));
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var columns = table.Context.Mapping.GetTable(typeof(T)).RowType.PersistentDataMembers;
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foreach (var column in columns)
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{
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//if (pair.Value.IsDbGenerated)
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// continue; //don't skip - all fields would be shifted
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var dc = new DataColumn();
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dc.ColumnName = column.MappedName;
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dc.DataType = column.Member.GetMemberType();
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if (dc.DataType.IsNullable())
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{
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dc.AllowDBNull = true;
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dc.DataType = dc.DataType.GetNullableType();
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}
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dt.Columns.Add(dc);
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}
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//TODO: cross-check null values against CanBeNull specifier
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//object[] indices = new object[] { };
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foreach (T row in rows)
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{
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DataRow dr = dt.NewRow();
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//use reflection to retrieve object's fields (TODO: optimize this later)
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foreach (var pair in columns)
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{
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//if (pair.Value.IsDbGenerated)
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// continue; //don't assign IDENTITY col
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object value = pair.Member.GetMemberValue(row);
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dr[pair.MappedName] = value ?? DBNull.Value;
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}
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//dr[1
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dt.Rows.Add(dr);
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}
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bulkCopy.WriteToServer(dt);
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}
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public override System.Data.Linq.IExecuteResult ExecuteMethodCall(DataContext context, System.Reflection.MethodInfo method, params object[] sqlParams)
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{
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throw new NotImplementedException();
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}
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}
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} |