private ProviderConnections?GetProviderConnection <T>(ITable <T> table)
where T : notnull
{
if (table.TryGetDataConnection(out var dataConnection) && _provider.Adapter.BulkCopy != null)
{
var connection = _provider.TryGetProviderConnection(dataConnection.Connection, table.DataContext.MappingSchema);
// for run in transaction see
// https://stackoverflow.com/questions/57675379
// provider will call sp_oledb_columns which creates temp table
var transaction = dataConnection.Transaction;
if (connection != null && transaction != null)
{
transaction = _provider.TryGetProviderTransaction(transaction, table.DataContext.MappingSchema);
}
if (connection != null && (dataConnection.Transaction == null || transaction != null))
{
return(new ProviderConnections()
{
DataConnection = dataConnection,
ProviderConnection = connection,
ProviderTransaction = transaction
});
}
}
return(default);
protected override BulkCopyRowsCopied ProviderSpecificCopy <T>(
ITable <T> table,
BulkCopyOptions options,
IEnumerable <T> source)
{
if (table.DataContext is DataConnection dataConnection && _provider.Adapter.BulkCopy != null)
{
var connection = _provider.TryGetProviderConnection(dataConnection.Connection, dataConnection.MappingSchema);
// for run in transaction see
// https://stackoverflow.com/questions/57675379
// provider will call sp_oledb_columns which creates temp table
var transaction = dataConnection.Transaction;
if (connection != null && transaction != null)
{
transaction = _provider.TryGetProviderTransaction(transaction, dataConnection.MappingSchema);
}
if (connection != null && (dataConnection.Transaction == null || transaction != null))
{
var ed = dataConnection.MappingSchema.GetEntityDescriptor(typeof(T));
var columns = ed.Columns.Where(c => !c.SkipOnInsert || options.KeepIdentity == true && c.IsIdentity).ToList();
var sb = _provider.CreateSqlBuilder(dataConnection.MappingSchema);
var rd = new BulkCopyReader(dataConnection, columns, source);
var sqlopt = SybaseProviderAdapter.AseBulkCopyOptions.Default;
var rc = new BulkCopyRowsCopied();
if (options.CheckConstraints == true)
{
sqlopt |= SybaseProviderAdapter.AseBulkCopyOptions.CheckConstraints;
}
if (options.KeepIdentity == true)
{
sqlopt |= SybaseProviderAdapter.AseBulkCopyOptions.KeepIdentity;
}
if (options.TableLock == true)
{
sqlopt |= SybaseProviderAdapter.AseBulkCopyOptions.TableLock;
}
if (options.KeepNulls == true)
{
sqlopt |= SybaseProviderAdapter.AseBulkCopyOptions.KeepNulls;
}
if (options.FireTriggers == true)
{
sqlopt |= SybaseProviderAdapter.AseBulkCopyOptions.FireTriggers;
}
if (options.UseInternalTransaction == true)
{
sqlopt |= SybaseProviderAdapter.AseBulkCopyOptions.UseInternalTransaction;
}
using (var bc = _provider.Adapter.BulkCopy.Create(connection, sqlopt, transaction))
{
if (options.NotifyAfter != 0 && options.RowsCopiedCallback != null)
{
bc.NotifyAfter = options.NotifyAfter;
bc.AseRowsCopied += (sender, args) =>
{
rc.RowsCopied = args.RowCopied;
options.RowsCopiedCallback(rc);
if (rc.Abort)
{
args.Abort = true;
}
};
}
if (options.MaxBatchSize.HasValue)
{
bc.BatchSize = options.MaxBatchSize.Value;
}
if (options.BulkCopyTimeout.HasValue)
{
bc.BulkCopyTimeout = options.BulkCopyTimeout.Value;
}
var tableName = GetTableName(sb, options, table);
// do not convert table and column names to valid sql name, as sybase bulk copy implementation
// doesn't understand escaped names (facepalm)
// which means it will probably fail when escaping required anyways...
bc.DestinationTableName = GetDestinationTableName(sb, options, table);
for (var i = 0; i < columns.Count; i++)
{
bc.ColumnMappings.Add(_provider.Adapter.BulkCopy.CreateColumnMapping(columns[i].ColumnName, columns[i].ColumnName));
}
TraceAction(
dataConnection,
() => "INSERT BULK " + tableName + "(" + string.Join(", ", columns.Select(x => x.ColumnName)) + Environment.NewLine,
() => { bc.WriteToServer(rd); return(rd.Count); });
}
if (rc.RowsCopied != rd.Count)
{
rc.RowsCopied = rd.Count;
if (options.NotifyAfter != 0 && options.RowsCopiedCallback != null)
{
options.RowsCopiedCallback(rc);
}
}
return(rc);
}
}
return(MultipleRowsCopy(table, options, source));
}
