public IExportTableArchive GetInitializedTableExportTask()
{
// Determine server name from connection string
// This is required, because bulk copy can go into databases that are only known
// by their connection string
// Get server name from data source name (requires trimming the sql server instance name)
string host = ((Jhu.Graywulf.Schema.SqlServer.SqlServerDataset)sources[0].Dataset).Host;
var ss = new SourceTableQuery[sources.Length];
for (int i = 0; i < sources.Length; i++)
{
ss[i] = new SourceTableQuery()
{
Dataset = sources[i].Dataset,
Query = String.Format("SELECT t.* FROM [{0}].[{1}] AS t", sources[i].SchemaName, sources[i].ObjectName)
};
}
// Create bulk operation
var te = RemoteServiceHelper.CreateObject <IExportTableArchive>(host);
te.Sources = ss;
te.Destinations = destinations;
te.Uri = uri;
te.FileFormatFactoryType = fileFormatFactoryType;
te.StreamFactoryType = streamFactoryType;
te.Timeout = timeout;
return(te);
}
protected void ExecuteInsertInto(SourceTableQuery source, Table destination, int timeout)
{
string sql = String.Format(
"INSERT [{0}].[{1}].[{2}] WITH (TABLOCKX) SELECT __tablealias.* FROM ({3}) AS __tablealias",
!String.IsNullOrWhiteSpace(destination.DatabaseName) ? destination.DatabaseName : destination.Dataset.DatabaseName,
destination.SchemaName,
destination.TableName,
source.Query);
ExecuteLongCommandNonQuery(sql, source.Dataset.ConnectionString, timeout);
}
/// <summary>
/// Creates and initializes a remote or local table copy task
/// </summary>
/// <param name="source"></param>
/// <param name="destination"></param>
/// <param name="local"></param>
/// <returns></returns>
protected ICopyTable CreateTableCopyTask(SourceTableQuery source, DestinationTable destination, bool local)
{
var desthost = GetHostnameFromSqlConnectionString(destination.Dataset.ConnectionString);
ICopyTable qi;
if (local)
{
qi = new CopyTable();
}
else
{
qi = RemoteServiceHelper.CreateObject <ICopyTable>(desthost);
}
qi.Source = source;
qi.Destination = destination;
return(qi);
}
/// <summary>
/// Copies a table from a remote data source by creating and
/// executing a table copy task.
/// </summary>
/// <param name="table"></param>
/// <param name="source"></param>
public void CopyRemoteTable(TableReference table, SourceTableQuery source)
{
// Create a target table name
var temptable = GetTemporaryTable(GetEscapedUniqueName(table));
TemporaryTables.TryAdd(table.UniqueName, temptable);
var dest = new DestinationTable(temptable)
{
Options = TableInitializationOptions.Drop | TableInitializationOptions.Create
};
var tc = CreateTableCopyTask(source, dest, false);
var guid = Guid.NewGuid();
RegisterCancelable(guid, tc);
tc.Execute();
UnregisterCancelable(guid);
}
private void OnAsyncExecute(Guid workflowInstanceGuid, string activityInstanceId, QueryPartitionBase querypartition, TableReference remotetable, SourceTableQuery source)
{
RegisterCancelable(workflowInstanceGuid, activityInstanceId, querypartition);
querypartition.CopyRemoteTable(remotetable, source);
UnregisterCancelable(workflowInstanceGuid, activityInstanceId, querypartition);
}
