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Add support for translating GROUP BY and OUTER APPLY; optimize transl…
…ated SQL - Resolves dotnet#2341 - Resolves dotnet#5085 - Resolves dotnet#6618 - Resolves dotnet#6647 - Resolves dotnet#6782 - Resolves dotnet#7080 - Resolves dotnet#7220 - Resolves dotnet#7417 - Resolves dotnet#7497 - Resolves dotnet#7523 - Resolves dotnet#7525
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14 changes: 14 additions & 0 deletions
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src/Microsoft.EntityFrameworkCore.InMemory/Query/Internal/IInMemoryResultOperatorHandler.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,14 @@ | ||
| // Copyright (c) .NET Foundation. All rights reserved. | ||
| // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information. | ||
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| using Remotion.Linq.Clauses; | ||
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| namespace Microsoft.EntityFrameworkCore.Query.Internal | ||
| { | ||
| /// <summary> | ||
| /// An in-memory-specific handler for <see cref="ResultOperatorBase" /> instances. | ||
| /// </summary> | ||
| public interface IInMemoryResultOperatorHandler : IResultOperatorHandler | ||
| { | ||
| } | ||
| } |
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112 changes: 112 additions & 0 deletions
112
src/Microsoft.EntityFrameworkCore.InMemory/Query/Internal/InMemoryResultOperatorHandler.cs
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,112 @@ | ||
| // Copyright (c) .NET Foundation. All rights reserved. | ||
| // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information. | ||
|
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| using System; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
| using System.Linq.Expressions; | ||
| using System.Reflection; | ||
| using JetBrains.Annotations; | ||
| using Microsoft.EntityFrameworkCore.Extensions.Internal; | ||
| using Microsoft.EntityFrameworkCore.Internal; | ||
| using Microsoft.EntityFrameworkCore.Metadata; | ||
| using Microsoft.EntityFrameworkCore.Metadata.Internal; | ||
| using Microsoft.EntityFrameworkCore.Query.Expressions; | ||
| using Microsoft.EntityFrameworkCore.Query.ExpressionVisitors; | ||
| using Microsoft.EntityFrameworkCore.Query.ExpressionVisitors.Internal; | ||
| using Remotion.Linq; | ||
| using Remotion.Linq.Clauses; | ||
| using Remotion.Linq.Clauses.Expressions; | ||
| using Remotion.Linq.Clauses.ResultOperators; | ||
| using Remotion.Linq.Parsing; | ||
| using Microsoft.EntityFrameworkCore.Storage; | ||
| using Remotion.Linq.Clauses.ExpressionVisitors; | ||
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| namespace Microsoft.EntityFrameworkCore.Query.Internal | ||
| { | ||
| using ResultHandler = Func<EntityQueryModelVisitor, ResultOperatorBase, QueryModel, Expression>; | ||
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| /// <summary> | ||
| /// This API supports the Entity Framework Core infrastructure and is not intended to be used | ||
| /// directly from your code. This API may change or be removed in future releases. | ||
| /// </summary> | ||
| public class InMemoryResultOperatorHandler : IInMemoryResultOperatorHandler | ||
| { | ||
| private static readonly Dictionary<Type, ResultHandler> _handlers | ||
| = new Dictionary<Type, ResultHandler> | ||
| { | ||
| { typeof(OfTypeResultOperator), (v, r, q) => HandleOfType(v, (OfTypeResultOperator)r) }, | ||
| }; | ||
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| private readonly IModel _model; | ||
| private readonly IResultOperatorHandler _resultOperatorHandler; | ||
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| /// <summary> | ||
| /// This API supports the Entity Framework Core infrastructure and is not intended to be used | ||
| /// directly from your code. This API may change or be removed in future releases. | ||
| /// </summary> | ||
| public InMemoryResultOperatorHandler( | ||
| [NotNull] IModel model, | ||
| [NotNull] IResultOperatorHandler resultOperatorHandler) | ||
| { | ||
| _model = model; | ||
| _resultOperatorHandler = resultOperatorHandler; | ||
| } | ||
|
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| /// <summary> | ||
| /// Handles the result operator. | ||
| /// </summary> | ||
| /// <param name="entityQueryModelVisitor"> The entity query model visitor. </param> | ||
| /// <param name="resultOperator"> The result operator. </param> | ||
| /// <param name="queryModel"> The query model. </param> | ||
| /// <returns> | ||
| /// An compiled query expression fragment representing the result operator. | ||
| /// </returns> | ||
| public virtual Expression HandleResultOperator( | ||
| EntityQueryModelVisitor entityQueryModelVisitor, | ||
| ResultOperatorBase resultOperator, | ||
| QueryModel queryModel) | ||
| { | ||
| ResultHandler handler; | ||
| if (!_handlers.TryGetValue(resultOperator.GetType(), out handler)) | ||
| { | ||
| return _resultOperatorHandler.HandleResultOperator( | ||
| entityQueryModelVisitor, | ||
| resultOperator, | ||
| queryModel); | ||
| } | ||
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| return handler(entityQueryModelVisitor, resultOperator, queryModel); | ||
| } | ||
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| private static Expression HandleOfType( | ||
| EntityQueryModelVisitor entityQueryModelVisitor, | ||
| OfTypeResultOperator ofTypeResultOperator) | ||
| { | ||
| var entityType | ||
| = entityQueryModelVisitor.QueryCompilationContext.Model | ||
| .FindEntityType(ofTypeResultOperator.SearchedItemType); | ||
|
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| if (entityType != null) | ||
| { | ||
| var currentExpression = entityQueryModelVisitor.Expression as MethodCallExpression; | ||
|
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| if (currentExpression?.Method == InMemoryQueryModelVisitor.ProjectionQueryMethodInfo) | ||
| { | ||
| return currentExpression.Update( | ||
| null, | ||
| new [] | ||
| { | ||
| currentExpression.Arguments[0], | ||
| Expression.Constant(entityType) | ||
| }); | ||
| } | ||
| } | ||
|
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| return Expression.Call( | ||
| entityQueryModelVisitor.LinqOperatorProvider.OfType | ||
| .MakeGenericMethod(ofTypeResultOperator.SearchedItemType), | ||
| entityQueryModelVisitor.Expression); | ||
| } | ||
| } | ||
| } |
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