/// <summary>
/// The WHERE clause, sometimes called the predicate, states the qualifying conditions for a query. Multiple conditions can be joined by boolean AND and OR clauses, optionally surrounded by (parentheses) to group them. The fields listed in a WHERE clause do not need to be listed in any SELECT clause.
/// </summary>
/// <param name="condition">Aggregate functions cannot be used in the WHERE clause.</param>
public static IWhereBigQueryable <T> Where <T>(this IWhereBigQueryable <T> source, Expression <Func <T, bool> > condition)
{
if (source == null)
{
throw new ArgumentNullException("source");
}
if (condition == null)
{
throw new ArgumentNullException("condition");
}
var where = source as WhereBigQueryable <T>;
if (where != null)
{
return(where.CombineWhere(condition));
}
else
{
return(new WhereBigQueryable <T>(source, condition));
}
}
public static ISelectBigQueryable <TResult> Select <TSource, TResult>(this IWhereBigQueryable <TSource> source, Expression <Func <TSource, TResult> > selector)
{
return(new SelectBigQueryable <TSource, TResult>(source, selector));
}
public static ISelectBigQueryable <TSource> Select <TSource>(this IWhereBigQueryable <TSource> source)
{
return(new SelectBigQueryable <TSource, TSource>(source, null));
}
public static IOrderByBigQueryable <TSource> OrderByDescending <TSource, TKey>(this IWhereBigQueryable <TSource> source, Expression <Func <TSource, TKey> > keySelector)
{
return(new OrderByBigQueryable <TSource, TKey>(source, keySelector, isDescending: true));
}
