private IStreamDataReader Decorate(List <IStreamDataReader> streamDataReaders, SelectCommandContext selectCommandContext, IStreamDataReader mergedStreamDataReader)
{
var paginationContext = selectCommandContext.GetPaginationContext();
if (!paginationContext.HasPagination() || 1 == streamDataReaders.Count)
{
return(mergedStreamDataReader);
}
String trunkDatabaseName = DatabaseTypes.GetTrunkDatabaseType(_databaseType.GetName()).GetName();
if ("MySql".Equals(trunkDatabaseName) || "PostgreSQL".Equals(trunkDatabaseName))
{
return(new LimitDecoratorStreamDataReader(mergedStreamDataReader, paginationContext));
}
if ("Oracle".Equals(trunkDatabaseName))
{
return(new RowNumberDecoratorStreamDataReader(mergedStreamDataReader, paginationContext));
}
if ("SQLServer".Equals(trunkDatabaseName))
{
return(new TopAndRowNumberDecoratorStreamDataReader(mergedStreamDataReader, paginationContext));
}
return(mergedStreamDataReader);
}