Fix to #27356 - Collection_navigation_equal_to_null_for_subquery fail…

…s after merging from release/6.0 Improvement on the previous patch fix (#26744). We were not taking into the account scenario where collection projected from FirstOrDefault was compared to null. Collection can only be null if the parent entity is null, so we can safely apply the same optimization we do for anonymous types and required entities. Fixes #27356
dotnet · Feb 11, 2022 · ae6f74d · ae6f74d
1 parent 9d51382
commit ae6f74d
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Showing 3 changed files with 6 additions and 6 deletions.
diff --git a/src/EFCore.Relational/Query/RelationalSqlTranslatingExpressionVisitor.cs b/src/EFCore.Relational/Query/RelationalSqlTranslatingExpressionVisitor.cs
@@ -367,7 +367,8 @@ protected override Expression VisitBinary(BinaryExpression binaryExpression)
                         {
                             var projection = translatedSubquery.ShaperExpression;
                             if (projection is NewExpression
-                                || RemoveConvert(projection) is EntityShaperExpression { IsNullable: false })
+                                || RemoveConvert(projection) is EntityShaperExpression { IsNullable: false }
+                                || RemoveConvert(projection) is CollectionResultExpression)
                             {
                                 var anySubquery = Expression.Call(
                                     QueryableMethods.AnyWithoutPredicate.MakeGenericMethod(translatedSubquery.Type.GetSequenceType()),

diff --git a/test/EFCore.Specification.Tests/Query/NorthwindMiscellaneousQueryTestBase.cs b/test/EFCore.Specification.Tests/Query/NorthwindMiscellaneousQueryTestBase.cs
@@ -5546,7 +5546,7 @@ protected static bool ClientEvalPredicate(Order order)
         protected internal uint ClientEvalSelector(Order order)
             => order.EmployeeID % 10 ?? 0;
 
-        [ConditionalTheory(Skip = "Issue#20445")]
+        [ConditionalTheory]
         [MemberData(nameof(IsAsyncData))]
         public virtual Task Collection_navigation_equal_to_null_for_subquery(bool async)
         {

diff --git a/test/EFCore.SqlServer.FunctionalTests/Query/NorthwindMiscellaneousQuerySqlServerTest.cs b/test/EFCore.SqlServer.FunctionalTests/Query/NorthwindMiscellaneousQuerySqlServerTest.cs
@@ -4589,11 +4589,10 @@ public override async Task Collection_navigation_equal_to_null_for_subquery(bool
             AssertSql(
                 @"SELECT [c].[CustomerID], [c].[Address], [c].[City], [c].[CompanyName], [c].[ContactName], [c].[ContactTitle], [c].[Country], [c].[Fax], [c].[Phone], [c].[PostalCode], [c].[Region]
 FROM [Customers] AS [c]
-WHERE (
-    SELECT TOP(1) [o].[OrderID]
+WHERE NOT (EXISTS (
+    SELECT 1
     FROM [Orders] AS [o]
-    WHERE [c].[CustomerID] = [o].[CustomerID]
-    ORDER BY [o].[OrderID]) IS NULL");
+    WHERE [c].[CustomerID] = [o].[CustomerID]))");
         }
 
         public override async Task Dependent_to_principal_navigation_equal_to_null_for_subquery(bool async)