private static IList <T> MergeFirst <T>(IList <IDataReader> dataReaders, SqlTable sqlTable, Boolean isSameShard)
{
if (dataReaders == null || dataReaders.Count == 0)
{
return(null);
}
if (sqlTable == null || sqlTable.ColumnList == null || sqlTable.ColumnList.Count == 0)
{
return(null);
}
var funcs = new List <Func <T> >();
for (Int32 i = 0; i < dataReaders.Count; i++)
{
var dataReader = dataReaders[i];
funcs.Add(() =>
{
try
{
LogManager.Logger.StartTracing();
T item = default(T);
using (dataReader)
{
OrmUtil.FillFirstByName(dataReader, sqlTable.ColumnList, ref item);
}
return(item);
}
finally
{
LogManager.Logger.StopTracing();
}
});
}
var result = ExecuteParallelHelper.ParallelExcuter(funcs, isSameShard);
return(result);
}