Resolve the SQL being executed behind the scenes in Entity Framework Core

IQueryableExtensions

using System.Reflection;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Query;
using Microsoft.EntityFrameworkCore.Query.Internal;
using Microsoft.EntityFrameworkCore.Storage;

public static class IQueryableExtensions
{
	private static readonly TypeInfo QueryCompilerTypeInfo = typeof(QueryCompiler).GetTypeInfo();

	private static readonly FieldInfo QueryCompilerField = typeof(EntityQueryProvider).GetTypeInfo().DeclaredFields.First(x => x.Name == "_queryCompiler");

	private static readonly FieldInfo QueryModelGeneratorField = QueryCompilerTypeInfo.DeclaredFields.First(x => x.Name == "_queryModelGenerator");

	private static readonly FieldInfo DataBaseField = QueryCompilerTypeInfo.DeclaredFields.Single(x => x.Name == "_database");

	private static readonly PropertyInfo DatabaseDependenciesField = typeof(Database).GetTypeInfo().DeclaredProperties.Single(x => x.Name == "Dependencies");

	public static string ToSql<TEntity>(this IQueryable<TEntity> query) where TEntity : class
	{
		var queryCompiler = (QueryCompiler) QueryCompilerField.GetValue(query.Provider);
		var modelGenerator = (QueryModelGenerator) QueryModelGeneratorField.GetValue(queryCompiler);
		var queryModel = modelGenerator.ParseQuery(query.Expression);
		var database = (IDatabase) DataBaseField.GetValue(queryCompiler);
		var databaseDependencies = (DatabaseDependencies) DatabaseDependenciesField.GetValue(database);
		var queryCompilationContext = databaseDependencies.QueryCompilationContextFactory.Create(false);
		var modelVisitor = (RelationalQueryModelVisitor) queryCompilationContext.CreateQueryModelVisitor();
		modelVisitor.CreateQueryExecutor<TEntity>(queryModel);
		var sql = modelVisitor.Queries.First().ToString();

		return sql;
	}
}

I think where TEntity : class is not needed. If we remove that, the method will work when a select is mapped to non reference type. eg:
MyDatabaseContext.MyTable.Select(t => t.Id).ToSql();
otherwise above will not compile.

Anyone knows how to port this to .net core 3? QueryModelGenerator, RelationalQueryModelVisitor and queryCompilationContext.CreateQuerymodelVisitor() all seems to have vanished.