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Query: Add CompileQuery overloads taking upto 15 parameters #20621

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Apr 14, 2020
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Query: Add CompileQuery overloads taking upto 15 parameters #20621

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1,106 changes: 1,060 additions & 46 deletions src/EFCore/EF.CompileAsyncQuery.cs
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130 changes: 130 additions & 0 deletions src/EFCore/EF.CompileAsyncQuery.tt
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<#@ assembly name="System.Core" #>
<#@ import namespace="System.Collections.Generic" #>
<#@ import namespace="System.Linq" #>
// 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.
// <auto-generated />

using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Threading;
using System.Threading.Tasks;
using JetBrains.Annotations;
using Microsoft.EntityFrameworkCore.Query;
using Microsoft.EntityFrameworkCore.Query.Internal;

namespace Microsoft.EntityFrameworkCore
{
public static partial class EF
{
/// <summary>
/// Creates a compiled query delegate that when invoked will execute the specified LINQ query.
/// </summary>
/// <typeparam name="TContext">The target DbContext type.</typeparam>
/// <typeparam name="TResult">The query result type.</typeparam>
/// <param name="queryExpression">The LINQ query expression.</param>
/// <returns>A delegate that can be invoked to execute the compiled query.</returns>
public static Func<TContext, IAsyncEnumerable<TResult>> CompileAsyncQuery<TContext, TResult>(
[NotNull] Expression<Func<TContext, DbSet<TResult>>> queryExpression)
where TContext : DbContext
where TResult : class
=> new CompiledAsyncEnumerableQuery<TContext, TResult>(queryExpression).Execute;
<#
var ordinal = new[] { "first", "second", "third", "fourth", "fifth", "sixth", "seventh", "eighth", "ninth", "tenth", "eleventh", "twelfth", "thirteenth", "fourteenth", "fifteenth", "sixteenth" };

var maxParameters = 15;

for (var parameterCount = 0; parameterCount <= maxParameters; parameterCount++)
{
var paramsList = string.Join("", Enumerable.Range(1, parameterCount).Select(e => "TParam" + e + ", "));
#>

/// <summary>
/// Creates a compiled query delegate that when invoked will execute the specified LINQ query.
/// </summary>
/// <typeparam name="TContext">The target DbContext type.</typeparam>
<# for (var i = 1; i <= parameterCount; i++) { #>
/// <typeparam name="TParam<#= i #>">The type of the <#= ordinal[i - 1] #> query parameter.</typeparam>
<# } #>
/// <typeparam name="TResult">The query result type.</typeparam>
/// <typeparam name="TProperty">The included property type.</typeparam>
/// <param name="queryExpression">The LINQ query expression.</param>
/// <returns>A delegate that can be invoked to execute the compiled query.</returns>
<# if (parameterCount <= 2 ) { #>
public static Func<TContext, <#= paramsList #>IAsyncEnumerable<TResult>> CompileAsyncQuery<TContext, <#= paramsList #>TResult, TProperty>(
<# } else { #>
public static Func<TContext, <#= paramsList #>IAsyncEnumerable<TResult>> CompileAsyncQuery<
TContext, <#= paramsList #>TResult, TProperty>(
<# } #>
[NotNull] Expression<Func<TContext, <#= paramsList #>IIncludableQueryable<TResult, TProperty>>> queryExpression)
where TContext : DbContext
=> new CompiledAsyncEnumerableQuery<TContext, TResult>(queryExpression).Execute;

/// <summary>
/// Creates a compiled query delegate that when invoked will execute the specified LINQ query.
/// </summary>
/// <typeparam name="TContext">The target DbContext type.</typeparam>
<# for (var i = 1; i <= parameterCount; i++) { #>
/// <typeparam name="TParam<#= i #>">The type of the <#= ordinal[i - 1] #> query parameter.</typeparam>
<# } #>
/// <typeparam name="TResult">The query result type.</typeparam>
/// <param name="queryExpression">The LINQ query expression.</param>
/// <returns>A delegate that can be invoked to execute the compiled query.</returns>
<# if (parameterCount <= 2 ) { #>
public static Func<TContext, <#= paramsList #>IAsyncEnumerable<TResult>> CompileAsyncQuery<TContext, <#= paramsList #>TResult>(
<# } else { #>
public static Func<TContext, <#= paramsList #>IAsyncEnumerable<TResult>> CompileAsyncQuery<
TContext, <#= paramsList #>TResult>(
<# } #>
[NotNull] Expression<Func<TContext, <#= paramsList #>IQueryable<TResult>>> queryExpression)
where TContext : DbContext
=> new CompiledAsyncEnumerableQuery<TContext, TResult>(queryExpression).Execute;

/// <summary>
/// Creates a compiled query delegate that when invoked will execute the specified LINQ query.
/// </summary>
/// <typeparam name="TContext">The target DbContext type.</typeparam>
<# for (var i = 1; i <= parameterCount; i++) { #>
/// <typeparam name="TParam<#= i #>">The type of the <#= ordinal[i - 1] #> query parameter.</typeparam>
<# } #>
/// <typeparam name="TResult">The query result type.</typeparam>
/// <param name="queryExpression">The LINQ query expression.</param>
/// <returns>A delegate that can be invoked to execute the compiled query.</returns>
<# if (parameterCount <= 3 ) { #>
public static Func<TContext, <#= paramsList #>Task<TResult>> CompileAsyncQuery<TContext, <#= paramsList #>TResult>(
<# } else { #>
public static Func<TContext, <#= paramsList #>Task<TResult>> CompileAsyncQuery<
TContext, <#= paramsList #>TResult>(
<# } #>
[NotNull] Expression<Func<TContext, <#= paramsList #>TResult>> queryExpression)
where TContext : DbContext
=> new CompiledAsyncTaskQuery<TContext, TResult>(queryExpression).ExecuteAsync;
<# if (parameterCount < 15) { #>

/// <summary>
/// Creates a compiled query delegate that when invoked will execute the specified LINQ query.
/// </summary>
/// <typeparam name="TContext">The target DbContext type.</typeparam>
<# for (var i = 1; i <= parameterCount; i++) { #>
/// <typeparam name="TParam<#= i #>">The type of the <#= ordinal[i - 1] #> query parameter.</typeparam>
<# } #>
/// <typeparam name="TResult">The query result type.</typeparam>
/// <param name="queryExpression">The LINQ query expression.</param>
/// <returns>A delegate that can be invoked to execute the compiled query.</returns>
<# if (parameterCount <= 3 ) { #>
public static Func<TContext, <#= paramsList #>CancellationToken, Task<TResult>> CompileAsyncQuery<TContext, <#= paramsList #>TResult>(
<# } else { #>
public static Func<TContext, <#= paramsList #>CancellationToken, Task<TResult>> CompileAsyncQuery<
TContext, <#= paramsList #>TResult>(
<# } #>
[NotNull] Expression<Func<TContext, <#= paramsList #>CancellationToken, TResult>> queryExpression)
where TContext : DbContext
=> new CompiledAsyncTaskQuery<TContext, TResult>(queryExpression).ExecuteAsync;
<# } #>
<#
}
#>
}
}
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