CheckOrderBy <TSource, TKey>(this IQueryable <TSource> source,
Expression <Func <TSource, TKey> > keySelector,
IComparer <TKey> comparer,
bool isDescending)
{
return(source.ApplyPerPartition(x_1 => HpcLinqHelper.CheckSort(x_1, keySelector, comparer, isDescending)));
}
/// <summary>
/// Broadcast a dataset to n partitions.
/// </summary>
/// <typeparam name="T">The type of the input records</typeparam>
/// <param name="source">The input dataset</param>
/// <returns>The output dataset, each partition of which is a copy of source</returns>
public static IQueryable <T> BroadCast <T>(this IQueryable <T> source, int n)
{
var dummy = source.ApplyPerPartition(x => HpcLinqHelper.ValueZero(x))
.HashPartition(x => x, n);
return(dummy.ApplyPerPartition(source, (x, y) => HpcLinqHelper.SelectSecond(x, y), true));
}
/// <summary>
/// Broadcast a dataset to multiple partitions
/// </summary>
/// <typeparam name="T">The type of the input records</typeparam>
/// <param name="source">The input dataset</param>
/// <returns>The output dataset, which consists of multiple copies of source</returns>
public static IQueryable <T> BroadCast <T>(this IQueryable <T> source)
{
return(source.ApplyPerPartition(source, (x, y) => HpcLinqHelper.SelectSecond(x, y), true));
}
CrossProduct <T1, T2, T3>(this IQueryable <T1> source1,
IQueryable <T2> source2,
Expression <Func <T1, T2, T3> > procFunc)
{
return(source1.ApplyPerPartition(source2, (x_1, y_1) => HpcLinqHelper.Cross(x_1, y_1, procFunc), true));
}
