NH-3445 - Select, Distinct, OrderBy, Take fails with NotSupportedException

[nhibernate-bot]

Mark Junker created an issue — 9th April 2013, 8:57:32:

A combination of Select, Distinct, OrderBy and Take fails with a NotSupportedException with the following stack trace:

       bei NHibernate.Hql.Ast.ANTLR.PolymorphicQuerySourceDetector.GetClassName(IASTNode querySource) in c:\Users\Mark\Desktop\nhcore\src\NHibernate\Hql\Ast\ANTLR\PolymorphicQuerySourceDetector.cs:Zeile 59.
       bei NHibernate.Hql.Ast.ANTLR.PolymorphicQuerySourceDetector.Process(IASTNode tree) in c:\Users\Mark\Desktop\nhcore\src\NHibernate\Hql\Ast\ANTLR\PolymorphicQuerySourceDetector.cs:Zeile 27.
       bei NHibernate.Hql.Ast.ANTLR.AstPolymorphicProcessor.Process() in c:\Users\Mark\Desktop\nhcore\src\NHibernate\Hql\Ast\ANTLR\AstPolymorphicProcessor.cs:Zeile 30.
       bei NHibernate.Hql.Ast.ANTLR.AstPolymorphicProcessor.Process(IASTNode ast, ISessionFactoryImplementor factory) in c:\Users\Mark\Desktop\nhcore\src\NHibernate\Hql\Ast\ANTLR\AstPolymorphicProcessor.cs:Zeile 24.
       bei NHibernate.Hql.Ast.ANTLR.ASTQueryTranslatorFactory.CreateQueryTranslators(IASTNode ast, String queryIdentifier, String collectionRole, Boolean shallow, IDictionary`2 filters, ISessionFactoryImplementor factory) in c:\Users\Mark\Desktop\nhcore\src\NHibernate\Hql\Ast\ANTLR\ASTQueryTranslatorFactory.cs:Zeile 29.
       bei NHibernate.Hql.Ast.ANTLR.ASTQueryTranslatorFactory.CreateQueryTranslators(IQueryExpression queryExpression, String collectionRole, Boolean shallow, IDictionary`2 filters, ISessionFactoryImplementor factory) in c:\Users\Mark\Desktop\nhcore\src\NHibernate\Hql\Ast\ANTLR\ASTQueryTranslatorFactory.cs:Zeile 24.
       bei NHibernate.Engine.Query.QueryExpressionPlan.CreateTranslators(IQueryExpression queryExpression, String collectionRole, Boolean shallow, IDictionary`2 enabledFilters, ISessionFactoryImplementor factory) in c:\Users\Mark\Desktop\nhcore\src\NHibernate\Engine\Query\QueryExpressionPlan.cs:Zeile 25.
       bei NHibernate.Engine.Query.QueryExpressionPlan..ctor(IQueryExpression queryExpression, Boolean shallow, IDictionary`2 enabledFilters, ISessionFactoryImplementor factory) in c:\Users\Mark\Desktop\nhcore\src\NHibernate\Engine\Query\QueryExpressionPlan.cs:Zeile 12.
       bei NHibernate.Engine.Query.QueryPlanCache.GetHQLQueryPlan(IQueryExpression queryExpression, Boolean shallow, IDictionary`2 enabledFilters) in c:\Users\Mark\Desktop\nhcore\src\NHibernate\Engine\Query\QueryPlanCache.cs:Zeile 67.
       bei NHibernate.Impl.AbstractSessionImpl.GetHQLQueryPlan(IQueryExpression queryExpression, Boolean shallow) in c:\Users\Mark\Desktop\nhcore\src\NHibernate\Impl\AbstractSessionImpl.cs:Zeile 412.
       bei NHibernate.Impl.AbstractSessionImpl.CreateQuery(IQueryExpression queryExpression) in c:\Users\Mark\Desktop\nhcore\src\NHibernate\Impl\AbstractSessionImpl.cs:Zeile 372.
       bei NHibernate.Linq.DefaultQueryProvider.PrepareQuery(Expression expression, IQuery& query, NhLinqExpression& nhQuery) in c:\Users\Mark\Desktop\nhcore\src\NHibernate\Linq\DefaultQueryProvider.cs:Zeile 70.
       bei NHibernate.Linq.DefaultQueryProvider.Execute(Expression expression) in c:\Users\Mark\Desktop\nhcore\src\NHibernate\Linq\DefaultQueryProvider.cs:Zeile 34.
       bei NHibernate.Linq.DefaultQueryProvider.Execute<TResult>(Expression expression) in c:\Users\Mark\Desktop\nhcore\src\NHibernate\Linq\DefaultQueryProvider.cs:Zeile 41.
       bei Remotion.Linq.QueryableBase`1.System.Collections.IEnumerable.GetEnumerator()

I'll add a patch for a test case.

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Mark Junker added a comment — 9th April 2013, 9:04:53:

Test case for master/head

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Alexander Zaytsev added a comment — 27th February 2014, 2:07:21:

The problem in HQL

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om2804 added a comment — 23rd December 2016, 12:21:00:

I use Select().OrderBy().Distinct() instead Select().Distinct().OrderBy(). It solved my problem with throw NotSupportedException

[h0lg]

Take() seems not to be the issue. I ran into the same NotSupportedException in 5.5.0 with a Select().Distinct().OrderBy() type query.

I can confirm this workaround:

I use Select().OrderBy().Distinct() instead Select().Distinct().OrderBy(). It solved my problem

[h0lg]

FYI A bit more context from my scenario:

I had a query like this:

IOrderedQueryable<Customer> GetAllWithOrdersBefore(DateTime date)
    => nhSession.Query<Order>()
    .Where(o => o.Id != 0 && o.Payment.Id != 0 && o.IsConfirmed)
    .Where(o => o.Date <= date)
    .Where(o => o.Customer != null)
    .Select(o => o.Customer).Distinct().OrderBy(c => c.Name);

which yielded a NotSupportedException thrown by PolymorphicQuerySourceDetector.GetClassName() with the following message containing the HQL query ( query ( select_from ( from ( range Order o ) ( join left ( . o Customer ) _0 ) ) ( select distinct _0 ) ) ( where ( and ( and ( and ( and ( ne ( . o Id ) ( : p1 ) ) ( ne ( . ( . o Payment ) Id ) ( : p2 ) ) ) ( . o IsConfirmed ) ) ( le ( . o Date ) ( : p3 ) ) ) ( is not null ( . o Customer ) ) ) ) )

The query works fine when using .OrderBy(c => c.Name).Distinct() instead of .Distinct().OrderBy(c => c.Name).