Query: Add XML docs for relational

src/EFCore.Relational/Query/Internal/ByteArraySequenceEqualTranslator.cs

@@ -8,15 +8,33 @@
 
 namespace Microsoft.EntityFrameworkCore.Query.Internal
 {
+    /// <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
+    ///     any release. You should only use it directly in your code with extreme caution and knowing that
+    ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+    /// </summary>
     public class ByteArraySequenceEqualTranslator: IMethodCallTranslator
     {
         private readonly ISqlExpressionFactory _sqlExpressionFactory;
 
+        /// <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
+        ///     any release. You should only use it directly in your code with extreme caution and knowing that
+        ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+        /// </summary>
         public ByteArraySequenceEqualTranslator([NotNull] ISqlExpressionFactory sqlExpressionFactory)
         {
             _sqlExpressionFactory = sqlExpressionFactory;
         }
 
+        /// <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
+        ///     any release. You should only use it directly in your code with extreme caution and knowing that
+        ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+        /// </summary>
         public virtual SqlExpression Translate(SqlExpression instance, MethodInfo method, IReadOnlyList<SqlExpression> arguments)
         {
             if (method.IsGenericMethod

src/EFCore.Relational/Query/Internal/CaseWhenFlatteningExpressionVisitor.cs

@@ -9,15 +9,33 @@
 
 namespace Microsoft.EntityFrameworkCore.Query.Internal
 {
+    /// <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
+    ///     any release. You should only use it directly in your code with extreme caution and knowing that
+    ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+    /// </summary>
     public class CaseWhenFlatteningExpressionVisitor : ExpressionVisitor
     {
         private readonly ISqlExpressionFactory _sqlExpressionFactory;
 
+        /// <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
+        ///     any release. You should only use it directly in your code with extreme caution and knowing that
+        ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+        /// </summary>
         public CaseWhenFlatteningExpressionVisitor([NotNull] ISqlExpressionFactory sqlExpressionFactory)
         {
             _sqlExpressionFactory = sqlExpressionFactory;
         }
 
+        /// <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
+        ///     any release. You should only use it directly in your code with extreme caution and knowing that
+        ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+        /// </summary>
         protected override Expression VisitExtension(Expression extensionExpression)
         {
             Check.NotNull(extensionExpression, nameof(extensionExpression));

src/EFCore.Relational/Query/Internal/CollectionJoinApplyingExpressionVisitor.cs

@@ -7,10 +7,22 @@
 
 namespace Microsoft.EntityFrameworkCore.Query.Internal
 {
+    /// <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
+    ///     any release. You should only use it directly in your code with extreme caution and knowing that
+    ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+    /// </summary>
     public class CollectionJoinApplyingExpressionVisitor : ExpressionVisitor
     {
         private int _collectionId;
 
+        /// <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
+        ///     any release. You should only use it directly in your code with extreme caution and knowing that
+        ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+        /// </summary>
         protected override Expression VisitExtension(Expression extensionExpression)
         {
             Check.NotNull(extensionExpression, nameof(extensionExpression));

src/EFCore.Relational/Query/Internal/CollectionMaterializationContext.cs

@@ -13,6 +13,12 @@ namespace Microsoft.EntityFrameworkCore.Query.Internal
     /// </summary>
     public class CollectionMaterializationContext
     {
+        /// <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
+        ///     any release. You should only use it directly in your code with extreme caution and knowing that
+        ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+        /// </summary>
         public CollectionMaterializationContext(
             [NotNull] object parent,
             [NotNull] object collection,
@@ -26,13 +32,55 @@ public CollectionMaterializationContext(
             ResultContext = new ResultContext();
         }
 
+        /// <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
+        ///     any release. You should only use it directly in your code with extreme caution and knowing that
+        ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+        /// </summary>
         public virtual ResultContext ResultContext { get; }
+        /// <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
+        ///     any release. You should only use it directly in your code with extreme caution and knowing that
+        ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+        /// </summary>
         public virtual object Parent { get; }
+        /// <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
+        ///     any release. You should only use it directly in your code with extreme caution and knowing that
+        ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+        /// </summary>
         public virtual object Collection { get; }
+        /// <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
+        ///     any release. You should only use it directly in your code with extreme caution and knowing that
+        ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+        /// </summary>
         public virtual object[] ParentIdentifier { get; }
+        /// <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
+        ///     any release. You should only use it directly in your code with extreme caution and knowing that
+        ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+        /// </summary>
         public virtual object[] OuterIdentifier { get; }
+        /// <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
+        ///     any release. You should only use it directly in your code with extreme caution and knowing that
+        ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+        /// </summary>
         public virtual object[] SelfIdentifier { get; private set; }
 
+        /// <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
+        ///     any release. You should only use it directly in your code with extreme caution and knowing that
+        ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+        /// </summary>
         public virtual void UpdateSelfIdentifier([NotNull] object[] selfIdentifier)
         {
             SelfIdentifier = selfIdentifier;

src/EFCore.Relational/Query/Internal/ComparisonTranslator.cs

@@ -10,15 +10,33 @@
 
 namespace Microsoft.EntityFrameworkCore.Query.Internal
 {
+    /// <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
+    ///     any release. You should only use it directly in your code with extreme caution and knowing that
+    ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+    /// </summary>
     public class ComparisonTranslator : IMethodCallTranslator
     {
         private readonly ISqlExpressionFactory _sqlExpressionFactory;
 
+        /// <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
+        ///     any release. You should only use it directly in your code with extreme caution and knowing that
+        ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+        /// </summary>
         public ComparisonTranslator([NotNull] ISqlExpressionFactory sqlExpressionFactory)
         {
             _sqlExpressionFactory = sqlExpressionFactory;
         }
 
+        /// <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
+        ///     any release. You should only use it directly in your code with extreme caution and knowing that
+        ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+        /// </summary>
         public virtual SqlExpression Translate(SqlExpression instance, MethodInfo method, IReadOnlyList<SqlExpression> arguments)
         {
             Check.NotNull(method, nameof(method));

src/EFCore.Relational/Query/Internal/ContainsTranslator.cs

@@ -10,15 +10,33 @@
 
 namespace Microsoft.EntityFrameworkCore.Query.Internal
 {
+    /// <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
+    ///     any release. You should only use it directly in your code with extreme caution and knowing that
+    ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+    /// </summary>
     public class ContainsTranslator : IMethodCallTranslator
     {
         private readonly ISqlExpressionFactory _sqlExpressionFactory;
 
+        /// <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
+        ///     any release. You should only use it directly in your code with extreme caution and knowing that
+        ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+        /// </summary>
         public ContainsTranslator([NotNull] ISqlExpressionFactory sqlExpressionFactory)
         {
             _sqlExpressionFactory = sqlExpressionFactory;
         }
 
+        /// <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
+        ///     any release. You should only use it directly in your code with extreme caution and knowing that
+        ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+        /// </summary>
         public virtual SqlExpression Translate(SqlExpression instance, MethodInfo method, IReadOnlyList<SqlExpression> arguments)
         {
             Check.NotNull(method, nameof(method));

src/EFCore.Relational/Query/Internal/EnumHasFlagTranslator.cs

@@ -10,18 +10,36 @@
 
 namespace Microsoft.EntityFrameworkCore.Query.Internal
 {
+    /// <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
+    ///     any release. You should only use it directly in your code with extreme caution and knowing that
+    ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+    /// </summary>
     public class EnumHasFlagTranslator : IMethodCallTranslator
     {
         private static readonly MethodInfo _methodInfo
             = typeof(Enum).GetRuntimeMethod(nameof(Enum.HasFlag), new[] { typeof(Enum) });
 
         private readonly ISqlExpressionFactory _sqlExpressionFactory;
 
+        /// <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
+        ///     any release. You should only use it directly in your code with extreme caution and knowing that
+        ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+        /// </summary>
         public EnumHasFlagTranslator([NotNull] ISqlExpressionFactory sqlExpressionFactory)
         {
             _sqlExpressionFactory = sqlExpressionFactory;
         }
 
+        /// <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
+        ///     any release. You should only use it directly in your code with extreme caution and knowing that
+        ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+        /// </summary>
         public virtual SqlExpression Translate(SqlExpression instance, MethodInfo method, IReadOnlyList<SqlExpression> arguments)
         {
             Check.NotNull(method, nameof(method));

src/EFCore.Relational/Query/Internal/EqualsTranslator.cs

@@ -11,15 +11,33 @@
 
 namespace Microsoft.EntityFrameworkCore.Query.Internal
 {
+    /// <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
+    ///     any release. You should only use it directly in your code with extreme caution and knowing that
+    ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+    /// </summary>
     public class EqualsTranslator : IMethodCallTranslator
     {
         private readonly ISqlExpressionFactory _sqlExpressionFactory;
 
+        /// <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
+        ///     any release. You should only use it directly in your code with extreme caution and knowing that
+        ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+        /// </summary>
         public EqualsTranslator([NotNull] ISqlExpressionFactory sqlExpressionFactory)
         {
             _sqlExpressionFactory = sqlExpressionFactory;
         }
 
+        /// <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
+        ///     any release. You should only use it directly in your code with extreme caution and knowing that
+        ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+        /// </summary>
         public virtual SqlExpression Translate(SqlExpression instance, MethodInfo method, IReadOnlyList<SqlExpression> arguments)
         {
             Check.NotNull(method, nameof(method));