Use SQLite CLI parameter syntax for SQLite query string

src/EFCore.SqlServer/Query/Internal/SqlServerQueryStringFactory.cs

@@ -25,7 +25,12 @@ public class SqlServerQueryStringFactory : IRelationalQueryStringFactory
     {
         private readonly IRelationalTypeMappingSource _typeMapper;
 
-        /// <summary>Initializes a new instance of the <see cref="T:System.Object" /> class.</summary>
+        /// <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 SqlServerQueryStringFactory([NotNull] IRelationalTypeMappingSource typeMapper)
         {
             _typeMapper = typeMapper;

src/EFCore.Sqlite.Core/Extensions/SqliteServiceCollectionExtensions.cs

@@ -63,6 +63,7 @@ public static IServiceCollection AddEntityFrameworkSqlite([NotNull] this IServic
                 .TryAdd<IMigrationsSqlGenerator, SqliteMigrationsSqlGenerator>()
                 .TryAdd<IRelationalDatabaseCreator, SqliteDatabaseCreator>()
                 .TryAdd<IHistoryRepository, SqliteHistoryRepository>()
+                .TryAdd<IRelationalQueryStringFactory, SqliteQueryStringFactory>()
 
                 // New Query Pipeline
                 .TryAdd<IMethodCallTranslatorProvider, SqliteMethodCallTranslatorProvider>()

src/EFCore.Sqlite.Core/Query/Internal/SqliteQueryStringFactory.cs

@@ -0,0 +1,67 @@
+// 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.
+
+using System;
+using System.Data.Common;
+using System.Text;
+using JetBrains.Annotations;
+using Microsoft.EntityFrameworkCore.Query;
+using Microsoft.EntityFrameworkCore.Storage;
+
+namespace Microsoft.EntityFrameworkCore.Sqlite.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 SqliteQueryStringFactory : IRelationalQueryStringFactory
+    {
+        private readonly IRelationalTypeMappingSource _typeMapper;
+
+        /// <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 SqliteQueryStringFactory([NotNull] IRelationalTypeMappingSource typeMapper)
+        {
+            _typeMapper = typeMapper;
+        }
+
+        /// <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 string Create(DbCommand command)
+        {
+            if (command.Parameters.Count == 0)
+            {
+                return command.CommandText;
+            }
+
+            var builder = new StringBuilder();
+            foreach (DbParameter parameter in command.Parameters)
+            {
+                var value = parameter.Value;
+                builder
+                    .Append(".param set ")
+                    .Append(parameter.ParameterName)
+                    .Append(' ')
+                    .AppendLine(
+                        value == null || value == DBNull.Value
+                            ? "NULL"
+                            : _typeMapper.FindMapping(value.GetType())?.GenerateSqlLiteral(value)
+                            ?? value.ToString());
+            }
+
+            return builder
+                .AppendLine()
+                .Append(command.CommandText).ToString();
+        }
+    }
+}

test/EFCore.Sqlite.FunctionalTests/Query/FromSqlQuerySqliteTest.cs

@@ -4,6 +4,7 @@
 using System.Data.Common;
 using Microsoft.Data.Sqlite;
 using Microsoft.EntityFrameworkCore.TestUtilities;
+using Xunit;
 using Xunit.Abstractions;
 
 namespace Microsoft.EntityFrameworkCore.Query
@@ -16,6 +17,37 @@ public FromSqlQuerySqliteTest(NorthwindQuerySqliteFixture<NoopModelCustomizer> f
             fixture.TestSqlLoggerFactory.SetTestOutputHelper(testOutputHelper);
         }
 
+        public override string FromSqlRaw_queryable_composed()
+        {
+            var queryString = base.FromSqlRaw_queryable_composed();
+
+            var expected = @"SELECT ""c"".""CustomerID"", ""c"".""Address"", ""c"".""City"", ""c"".""CompanyName"", ""c"".""ContactName"", ""c"".""ContactTitle"", ""c"".""Country"", ""c"".""Fax"", ""c"".""Phone"", ""c"".""PostalCode"", ""c"".""Region""
+FROM (
+    SELECT * FROM ""Customers""
+) AS ""c""
+WHERE ('z' = '') OR (instr(""c"".""ContactName"", 'z') > 0)";
+
+            Assert.Equal(expected, queryString);
+
+            return null;
+        }
+
+        public override string FromSqlRaw_queryable_with_parameters_and_closure()
+        {
+            var queryString = base.FromSqlRaw_queryable_with_parameters_and_closure();
+
+            Assert.Equal(@".param set p0 'London'
+.param set @__contactTitle_1 'Sales Representative'
+
+SELECT ""c"".""CustomerID"", ""c"".""Address"", ""c"".""City"", ""c"".""CompanyName"", ""c"".""ContactName"", ""c"".""ContactTitle"", ""c"".""Country"", ""c"".""Fax"", ""c"".""Phone"", ""c"".""PostalCode"", ""c"".""Region""
+FROM (
+    SELECT * FROM ""Customers"" WHERE ""City"" = @p0
+) AS ""c""
+WHERE ""c"".""ContactTitle"" = @__contactTitle_1", queryString);
+
+            return null;
+        }
+
         public override void Bad_data_error_handling_invalid_cast_key()
         {
             // Not supported on SQLite

test/EFCore.Sqlite.FunctionalTests/Query/NorthwindWhereQuerySqliteTest.cs

@@ -36,7 +36,8 @@ public override async Task<string> Where_simple_closure(bool async)
 WHERE ""c"".""City"" = @__city_0");
 
             Assert.Equal(
-                @"-- @__city_0='London' (Size = 6)
+                @".param set @__city_0 'London'
+
 SELECT ""c"".""CustomerID"", ""c"".""Address"", ""c"".""City"", ""c"".""CompanyName"", ""c"".""ContactName"", ""c"".""ContactTitle"", ""c"".""Country"", ""c"".""Fax"", ""c"".""Phone"", ""c"".""PostalCode"", ""c"".""Region""
 FROM ""Customers"" AS ""c""
 WHERE ""c"".""City"" = @__city_0", queryString, ignoreLineEndingDifferences: true, ignoreWhiteSpaceDifferences: true);