Fix OPENJSON postprocessing with split query (dotnet#32978)

Fixes dotnet#32976

(cherry picked from commit 451514e)

Author: roji

src/EFCore.SqlServer/Query/Internal/SqlServerJsonPostprocessor.cs

@@ -32,6 +32,9 @@ private readonly
 
     private RelationalTypeMapping? _nvarcharMaxTypeMapping;
 
+    private static readonly bool UseOldBehavior32976 =
+        AppContext.TryGetSwitch("Microsoft.EntityFrameworkCore.Issue32976", out var enabled32976) && enabled32976;
+
     /// <summary>
     ///     This is an internal API that supports the Entity Framework Core infrastructure and not subject to
     ///     the same compatibility standards as public APIs. It may be changed or removed without notice in
@@ -70,7 +73,14 @@ public virtual Expression Process(Expression expression)
         switch (expression)
         {
             case ShapedQueryExpression shapedQueryExpression:
-                return shapedQueryExpression.UpdateQueryExpression(Visit(shapedQueryExpression.QueryExpression));
+                shapedQueryExpression = shapedQueryExpression.UpdateQueryExpression(Visit(shapedQueryExpression.QueryExpression));
+
+                if (!UseOldBehavior32976)
+                {
+                    shapedQueryExpression = shapedQueryExpression.UpdateShaperExpression(Visit(shapedQueryExpression.ShaperExpression));
+                }
+
+                return shapedQueryExpression;
 
             case SelectExpression selectExpression:
             {

test/EFCore.SqlServer.FunctionalTests/Query/NonSharedPrimitiveCollectionsQuerySqlServerTest.cs

@@ -871,6 +871,42 @@ public virtual async Task Same_collection_with_conflicting_type_mappings_not_sup
 
     #endregion Type mapping inference
 
+    [ConditionalFact]
+    public virtual async Task Ordered_collection_with_split_query()
+    {
+        var contextFactory = await InitializeAsync<Context32976>(
+            onModelCreating: mb => mb.Entity<Context32976.Principal>(),
+            seed: context =>
+            {
+                context.Add(new Context32976.Principal { Ints = [2, 3, 4]});
+                context.SaveChanges();
+            });
+
+        await using var context = contextFactory.CreateContext();
+
+        _ = await context.Set<Context32976.Principal>()
+            .Where(p => p.Ints.Skip(1).Contains(3))
+            .Include(p => p.Dependents)
+            .AsSplitQuery()
+            .SingleAsync();
+    }
+
+    public class Context32976(DbContextOptions options) : DbContext(options)
+    {
+        public class Principal
+        {
+            public int Id { get; set; }
+            public List<int> Ints { get; set; }
+            public List<Dependent> Dependents { get; set; }
+        }
+
+        public class Dependent
+        {
+            public int Id { get; set; }
+            public Principal Principal { get; set; }
+        }
+    }
+
     [ConditionalFact]
     public virtual void Check_all_tests_overridden()
         => TestHelpers.AssertAllMethodsOverridden(GetType());