Support association joins from main query to be used in subqueries

src/NHibernate.Test/Async/NHSpecificTest/GH3334/Fixture.cs

@@ -0,0 +1,204 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by AsyncGenerator.
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+
+using System.Collections.Generic;
+using System.Runtime.CompilerServices;
+using NUnit.Framework;
+
+namespace NHibernate.Test.NHSpecificTest.GH3334
+{
+	using System.Threading.Tasks;
+	[TestFixture]
+	public class FixtureAsync : BugTestCase
+	{
+		[OneTimeSetUp]
+		public void OneTimeSetUp()
+		{
+			using var session = OpenSession();
+			using var t = session.BeginTransaction();
+			var parent = new Entity
+			{
+				Name = "Parent1",
+				Children = { new ChildEntity { Name = "Child", Child = new GrandChildEntity { Name = "GrandChild" } } }
+			};
+			session.Save(parent);
+			parent = new Entity
+			{
+				Name = "Parent2",
+				Children = { new ChildEntity { Name = "Child", Child = new GrandChildEntity { Name = "XGrandChild" } } }
+			};
+			var other = new OtherEntity { Name = "ABC", Entities = {parent}};
+			parent.OtherEntity = other;
+			session.Save(parent);
+			session.Save(other);
+			t.Commit();
+		}
+
+		[OneTimeTearDown]
+		public void OneTimeTearDown()
+		{
+			using var session = OpenSession();
+			using var transaction = session.BeginTransaction();
+
+			session.CreateQuery("delete from ChildEntity").ExecuteUpdate();
+			session.CreateQuery("delete from GrandChildEntity").ExecuteUpdate();
+			session.CreateQuery("delete from Entity").ExecuteUpdate();
+			session.CreateQuery("delete from OtherEntity").ExecuteUpdate();
+
+			transaction.Commit();
+		}
+
+		protected override bool AppliesTo(Dialect.Dialect dialect)
+		{
+			return TestDialect.SupportsCorrelatedColumnsInSubselectJoin;
+		}
+
+		public class TestCaseItem
+		{
+			public string Name { get; }
+			public string Hql { get; }
+			public int LineNumber { get; }
+
+			public TestCaseItem(string name, string hql, [CallerLineNumber] int lineNumber = 0)
+			{
+				Name = name;
+				Hql = hql;
+				LineNumber = lineNumber;
+			}
+
+			public override string ToString() => $"{LineNumber:0000}: {Name}";
+		}
+
+		public static IEnumerable<TestCaseItem> GetNoExceptionOnExecuteQueryTestCases()
+		{
+			/* does not work because of inner join or theta join created for many-to-one
+				@"
+				SELECT ROOT 
+				FROM Entity AS ROOT 
+				WHERE
+					EXISTS 
+						(FROM ELEMENTS(ROOT.Children) AS child
+						WHERE
+							child.Child.Name like 'G%'
+							OR ROOT.OtherEntity.Name like 'A%'
+						)");*/
+
+			yield return new("Basic Elements case 1 FoundViaGrandChildG", @"
+				SELECT ROOT 
+				FROM Entity AS ROOT 
+				WHERE
+					EXISTS 
+						(FROM ELEMENTS(ROOT.Children) AS child
+							LEFT JOIN child.Child AS grandChild
+						WHERE
+							grandChild.Name like 'G%'
+						)");
+			yield return new("Basic Elements case 2 FoundViaOtherEntityA", @"
+				SELECT ROOT 
+				FROM Entity AS ROOT 
+				WHERE
+					EXISTS 
+						(FROM ELEMENTS(ROOT.OtherEntity) AS otherEntity
+						WHERE
+							otherEntity.Name like 'A%'
+						)");
+			yield return new("HQL Elements FoundViaGrandChildG", @"
+				SELECT ROOT 
+				FROM Entity AS ROOT 
+				WHERE
+					EXISTS 
+						(FROM ELEMENTS(ROOT.Children) AS child
+							LEFT JOIN child.Child AS grandChild
+							LEFT JOIN ROOT.OtherEntity AS otherEntity
+						WHERE
+							grandChild.Name like 'G%'
+							OR otherEntity.Name like 'G%'
+						)");
+			yield return new("HQL Elements FoundViaOtherEntityA", @"
+				SELECT ROOT 
+				FROM Entity AS ROOT 
+				WHERE
+					EXISTS 
+						(FROM ELEMENTS(ROOT.Children) AS child
+							LEFT JOIN child.Child AS grandChild
+							LEFT JOIN ROOT.OtherEntity AS otherEntity
+						WHERE
+							grandChild.Name like 'A%'
+							OR otherEntity.Name like 'A%'
+						)");
+			yield return new("HQL Entity FoundViaGrandChildG", @"
+				SELECT ROOT 
+				FROM Entity AS ROOT 
+				WHERE
+					EXISTS 
+						(FROM ChildEntity AS child
+							LEFT JOIN child.Child AS grandChild
+							LEFT JOIN ROOT.OtherEntity AS otherEntity
+						WHERE
+							child.Parent = ROOT
+							AND (
+								grandChild.Name like 'G%'
+								OR otherEntity.Name like 'G%'
+							)
+						)");
+			yield return new("HQL Entity FoundViaOtherEntityA", @"
+				SELECT ROOT 
+				FROM Entity AS ROOT 
+				WHERE
+					EXISTS 
+						(FROM ChildEntity AS child
+							LEFT JOIN child.Child AS grandChild
+							LEFT JOIN ROOT.OtherEntity AS otherEntity
+						WHERE
+							child.Parent = ROOT
+							AND (
+								grandChild.Name like 'A%'
+								OR otherEntity.Name like 'A%'
+							)
+						)");
+			yield return new("FROM ROOT.Children FoundViaGrandChildG", @"
+				SELECT ROOT 
+				FROM Entity AS ROOT 
+				WHERE
+					EXISTS 
+						(FROM ROOT.Children AS child
+							LEFT JOIN child.Child AS grandChild
+						WHERE
+							grandChild.Name like 'G%'
+						)");
+			yield return new("FROM ROOT.OtherEntity FoundViaOtherEntityA", @"
+				SELECT ROOT 
+				FROM Entity AS ROOT 
+				WHERE
+					EXISTS 
+						(FROM ROOT.OtherEntity AS otherEntity 
+							LEFT JOIN ChildEntity AS child ON child.Parent = ROOT 
+							LEFT JOIN child.Child AS grandChild
+						WHERE
+								grandChild.Name like 'A%'
+								OR otherEntity.Name like 'A%'
+						)");
+		}
+
+		[Test, TestCaseSource(nameof(GetNoExceptionOnExecuteQueryTestCases))]
+		public async Task NoExceptionOnExecuteQueryAsync(TestCaseItem testCase)
+		{
+			using var session = OpenSession();
+			var q = session.CreateQuery(testCase.Hql);
+			Assert.That(await (q.ListAsync()), Has.Count.EqualTo(1));
+		}
+
+		protected override bool CheckDatabaseWasCleaned()
+		{
+			// same set of objects for each test
+			return true;
+		}
+	}
+}