/// <summary>
/// This query-builder method creates a new query whose results are all of
/// the results of this query, plus all of the results of the other query,
/// without duplicates (i.e., results are unique).
/// </summary>
/// <param name="query"> A query representing the results to add. </param>
/// <returns> a new ObjectQuery instance. </returns>
/// <exception cref="T:System.ArgumentNullException">If the query parameter is null.</exception>
public ObjectQuery <T> Union(ObjectQuery <T> query)
{
Check.NotNull <ObjectQuery <T> >(query, nameof(query));
if (ObjectQuery <T> .IsLinqQuery((ObjectQuery)this) || ObjectQuery <T> .IsLinqQuery((ObjectQuery)query))
{
return((ObjectQuery <T>) this.Union <T>((IEnumerable <T>)query));
}
return(new ObjectQuery <T>(EntitySqlQueryBuilder.Union(this.QueryState, query.QueryState)));
}
/// <summary>
/// This query-builder method creates a new query whose results are all of
/// the results of this query, plus all of the results of the other query,
/// without duplicates (i.e., results are unique).
/// </summary>
/// <param name="query">
/// A query representing the results to add.
/// </param>
/// <returns>
/// a new ObjectQuery instance.
/// </returns>
/// <exception cref="ArgumentNullException">
/// If the query parameter is null.
/// </exception>
public ObjectQuery <T> Union(ObjectQuery <T> query)
{
EntityUtil.CheckArgumentNull(query, "query");
if (IsLinqQuery(this) || IsLinqQuery(query))
{
return((ObjectQuery <T>)Queryable.Union(this, query));
}
return(new ObjectQuery <T>(EntitySqlQueryBuilder.Union(this.QueryState, query.QueryState)));
}
