Add immutable annotation support to TableExpressionBase

src/EFCore.InMemory/Query/Internal/InMemoryQueryableMethodTranslatingExpressionVisitor.cs

@@ -1321,11 +1321,6 @@ entityShaperExpression.ValueBufferExpression is ProjectionBindingExpression proj
 
             return innerShaper;
         }
-
-        private static Expression AddConvertToObject(Expression expression)
-            => expression.Type.IsValueType
-                ? Expression.Convert(expression, typeof(object))
-                : expression;
     }
 
     private ShapedQueryExpression TranslateTwoParameterSelector(ShapedQueryExpression source, LambdaExpression resultSelector)

src/EFCore.Relational/Query/RelationalQueryableMethodTranslatingExpressionVisitor.cs

@@ -1655,11 +1655,11 @@ SelectExpression BuildInnerSelectExpressionForOwnedTypeMappedToDifferentTable(
                             : foreignKey.PrincipalKey.Properties[0]);
 
                 var sourceTable = FindRootTableExpressionForColumn(sourceColumn);
-                var ownedTable = new TableExpression(targetTable);
+                TableExpressionBase ownedTable = new TableExpression(targetTable);
 
                 foreach (var annotation in sourceTable.GetAnnotations())
                 {
-                    ownedTable.SetAnnotation(annotation.Name, annotation.Value);
+                    ownedTable = ownedTable.AddAnnotation(annotation.Name, annotation.Value);
                 }
 
                 return _sqlExpressionFactory.Select(targetEntityType, ownedTable);
@@ -1688,11 +1688,6 @@ static TableExpressionBase FindRootTableExpressionForColumn(ColumnExpression col
             }
         }
 
-        private static Expression AddConvertToObject(Expression expression)
-            => expression.Type.IsValueType
-                ? Expression.Convert(expression, typeof(object))
-                : expression;
-
         private EntityProjectionExpression GetEntityProjectionExpression(EntityShaperExpression entityShaperExpression)
             => entityShaperExpression.ValueBufferExpression switch
             {

src/EFCore.Relational/Query/SqlExpressions/CrossApplyExpression.cs

@@ -43,6 +43,10 @@ public virtual CrossApplyExpression Update(TableExpressionBase table)
             ? new CrossApplyExpression(table, GetAnnotations())
             : this;
 
+    /// <inheritdoc />
+    protected override TableExpressionBase CreateWithAnnotations(IEnumerable<IAnnotation> annotations)
+        => new CrossApplyExpression(Table, GetAnnotations());
+
     /// <inheritdoc />
     protected override void Print(ExpressionPrinter expressionPrinter)
     {

src/EFCore.Relational/Query/SqlExpressions/CrossJoinExpression.cs

@@ -43,6 +43,10 @@ public virtual CrossJoinExpression Update(TableExpressionBase table)
             ? new CrossJoinExpression(table, GetAnnotations())
             : this;
 
+    /// <inheritdoc />
+    protected override TableExpressionBase CreateWithAnnotations(IEnumerable<IAnnotation> annotations)
+        => new CrossJoinExpression(Table, annotations);
+
     /// <inheritdoc />
     protected override void Print(ExpressionPrinter expressionPrinter)
     {

src/EFCore.Relational/Query/SqlExpressions/ExceptExpression.cs

@@ -61,6 +61,10 @@ public virtual ExceptExpression Update(SelectExpression source1, SelectExpressio
             ? new ExceptExpression(Alias, source1, source2, IsDistinct, GetAnnotations())
             : this;
 
+    /// <inheritdoc />
+    protected override TableExpressionBase CreateWithAnnotations(IEnumerable<IAnnotation> annotations)
+        => new ExceptExpression(Alias, Source1, Source2, IsDistinct, annotations);
+
     /// <inheritdoc />
     protected override void Print(ExpressionPrinter expressionPrinter)
     {

src/EFCore.Relational/Query/SqlExpressions/FromSqlExpression.cs

@@ -83,6 +83,10 @@ public virtual FromSqlExpression Update(Expression arguments)
             ? new FromSqlExpression(Alias, _table, Sql, arguments, GetAnnotations())
             : this;
 
+    /// <inheritdoc />
+    protected override TableExpressionBase CreateWithAnnotations(IEnumerable<IAnnotation> annotations)
+        => new FromSqlExpression(Alias, _table, Sql, Arguments, annotations);
+
     /// <inheritdoc />
     ITableBase ITableBasedExpression.Table => _table;
 

src/EFCore.Relational/Query/SqlExpressions/InnerJoinExpression.cs

@@ -53,6 +53,10 @@ public virtual InnerJoinExpression Update(TableExpressionBase table, SqlExpressi
             ? new InnerJoinExpression(table, joinPredicate, GetAnnotations())
             : this;
 
+    /// <inheritdoc />
+    protected override TableExpressionBase CreateWithAnnotations(IEnumerable<IAnnotation> annotations)
+        => new InnerJoinExpression(Table, JoinPredicate, annotations);
+
     /// <inheritdoc />
     protected override void Print(ExpressionPrinter expressionPrinter)
     {

src/EFCore.Relational/Query/SqlExpressions/IntersectExpression.cs

@@ -61,6 +61,10 @@ public virtual IntersectExpression Update(SelectExpression source1, SelectExpres
             ? new IntersectExpression(Alias, source1, source2, IsDistinct, GetAnnotations())
             : this;
 
+    /// <inheritdoc />
+    protected override TableExpressionBase CreateWithAnnotations(IEnumerable<IAnnotation> annotations)
+        => new IntersectExpression(Alias, Source1, Source2, IsDistinct, annotations);
+
     /// <inheritdoc />
     protected override void Print(ExpressionPrinter expressionPrinter)
     {

src/EFCore.Relational/Query/SqlExpressions/LeftJoinExpression.cs

@@ -53,6 +53,10 @@ public virtual LeftJoinExpression Update(TableExpressionBase table, SqlExpressio
             ? new LeftJoinExpression(table, joinPredicate, GetAnnotations())
             : this;
 
+    /// <inheritdoc />
+    protected override TableExpressionBase CreateWithAnnotations(IEnumerable<IAnnotation> annotations)
+        => new LeftJoinExpression(Table, JoinPredicate, annotations);
+
     /// <inheritdoc />
     protected override void Print(ExpressionPrinter expressionPrinter)
     {

src/EFCore.Relational/Query/SqlExpressions/OuterApplyExpression.cs

@@ -43,6 +43,10 @@ public virtual OuterApplyExpression Update(TableExpressionBase table)
             ? new OuterApplyExpression(table, GetAnnotations())
             : this;
 
+    /// <inheritdoc />
+    protected override TableExpressionBase CreateWithAnnotations(IEnumerable<IAnnotation> annotations)
+        => new OuterApplyExpression(Table, annotations);
+
     /// <inheritdoc />
     protected override void Print(ExpressionPrinter expressionPrinter)
     {

src/EFCore.Relational/Query/SqlExpressions/SelectExpression.Helper.cs

@@ -513,6 +513,9 @@ public TpcTablesExpression Prune(IReadOnlyList<string> discriminatorValues)
         // This is implementation detail hence visitors are not supposed to see inside unless they really need to.
         protected override Expression VisitChildren(ExpressionVisitor visitor) => this;
 
+        protected override TableExpressionBase CreateWithAnnotations(IEnumerable<IAnnotation> annotations)
+            => new TpcTablesExpression(Alias, EntityType, SelectExpressions, annotations);
+
         protected override void Print(ExpressionPrinter expressionPrinter)
         {
             expressionPrinter.AppendLine("(");

src/EFCore.Relational/Query/SqlExpressions/SelectExpression.cs

@@ -56,6 +56,8 @@ public sealed partial class SelectExpression : TableExpressionBase
     private readonly List<string?> _aliasForClientProjections = new();
     private CloningExpressionVisitor? _cloningExpressionVisitor;
 
+    private SortedDictionary<string, IAnnotation>? _annotations;
+
 #if DEBUG
     private List<string>? _removedAliases;
 #endif
@@ -68,13 +70,22 @@ private SelectExpression(
         List<SqlExpression> groupBy,
         List<OrderingExpression> orderings,
         IEnumerable<IAnnotation> annotations)
-        : base(alias, annotations)
+        : base(alias)
     {
         _projection = projections;
         _tables = tables;
         _tableReferences = tableReferences;
         _groupBy = groupBy;
         _orderings = orderings;
+
+        if (annotations != null)
+        {
+            _annotations = new SortedDictionary<string, IAnnotation>();
+            foreach (var annotation in annotations)
+            {
+                _annotations[annotation.Name] = annotation;
+            }
+        }
     }
 
     private SelectExpression(string? alias)
@@ -3776,6 +3787,39 @@ public SelectExpression Update(
         return newSelectExpression;
     }
 
+    /// <inheritdoc />
+    protected override TableExpressionBase CreateWithAnnotations(IEnumerable<IAnnotation> annotations)
+        => throw new NotImplementedException("inconceivable");
+
+    /// <inheritdoc />
+    public override TableExpressionBase AddAnnotation(string name, object? value)
+    {
+        var oldAnnotation = FindAnnotation(name);
+        if (oldAnnotation != null)
+        {
+            return Equals(oldAnnotation.Value, value)
+                ? this
+                : throw new InvalidOperationException(CoreStrings.DuplicateAnnotation(name, this.Print()));
+        }
+
+        _annotations ??= new();
+        _annotations[name] = new Annotation(name, value);
+
+        return this;
+    }
+
+    /// <inheritdoc />
+    public override IAnnotation? FindAnnotation(string name)
+        => _annotations == null
+            ? null
+            : _annotations.TryGetValue(name, out var annotation)
+                ? annotation
+                : null;
+
+    /// <inheritdoc />
+    public override IEnumerable<IAnnotation> GetAnnotations()
+        => _annotations?.Values ?? Enumerable.Empty<IAnnotation>();
+
     /// <inheritdoc />
     protected override void Print(ExpressionPrinter expressionPrinter)
     {

src/EFCore.Relational/Query/SqlExpressions/TableExpression.cs

@@ -28,23 +28,6 @@ private TableExpression(ITableBase table, IEnumerable<IAnnotation>? annotations)
         Table = table;
     }
 
-    /// <inheritdoc />
-    ITableBase ITableBasedExpression.Table => Table;
-
-    /// <inheritdoc />
-    protected override void Print(ExpressionPrinter expressionPrinter)
-    {
-        if (!string.IsNullOrEmpty(Schema))
-        {
-            expressionPrinter.Append(Schema).Append(".");
-        }
-
-        expressionPrinter.Append(Name);
-        PrintAnnotations(expressionPrinter);
-
-        expressionPrinter.Append(" AS ").Append(Alias);
-    }
-
     /// <summary>
     ///     The alias assigned to this table source.
     /// </summary>
@@ -71,8 +54,28 @@ public override string? Alias
     public ITableBase Table { get; }
 
     /// <inheritdoc />
-    public TableExpressionBase Clone()
-        => new TableExpression(Table, GetAnnotations()) { Alias = Alias };
+    protected override TableExpressionBase CreateWithAnnotations(IEnumerable<IAnnotation> annotations)
+        => new TableExpression(Table, annotations) { Alias = Alias };
+
+    /// <inheritdoc />
+    ITableBase ITableBasedExpression.Table => Table;
+
+    /// <inheritdoc />
+    protected override void Print(ExpressionPrinter expressionPrinter)
+    {
+        if (!string.IsNullOrEmpty(Schema))
+        {
+            expressionPrinter.Append(Schema).Append(".");
+        }
+
+        expressionPrinter.Append(Name);
+        PrintAnnotations(expressionPrinter);
+
+        expressionPrinter.Append(" AS ").Append(Alias);
+    }
+
+    /// <inheritdoc />
+    public TableExpressionBase Clone() => CreateWithAnnotations(GetAnnotations());
 
     /// <inheritdoc />
     public override bool Equals(object? obj)