add linq2db package

Author: poma12390

.github/workflows/slo.yml

@@ -20,6 +20,7 @@ jobs:
           - AdoNet
           - Dapper
           - EF
+          - Linq2db.Slo
         include:
           - workload: AdoNet
             read_rps: 1000
@@ -30,6 +31,9 @@ jobs:
           - workload: EF
             read_rps: 1000
             write_rps: 100
+          - workload: Linq2db.Slo
+            read_rps: 1000
+            write_rps: 100
 
     concurrency:
       group: slo-${{ github.ref }}-${{ matrix.workload }}

slo/src/Linq2db.Slo/Linq2db.Slo.csproj

@@ -0,0 +1,19 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <OutputType>Exe</OutputType>
+        <TargetFramework>net8.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+        <RootNamespace>Linq2db</RootNamespace>
+    </PropertyGroup>
+	    <ItemGroup>
+			<PackageReference Include="Community.Ydb.Linq2db" Version="0.0.1" />
+		</ItemGroup>
+	    <ItemGroup>	
+			<ProjectReference Include="..\Internal\Internal.csproj" />
+		</ItemGroup>
+		<ItemGroup>
+			<PackageReference Include="linq2db" Version="6.0.0-rc.3" />
+		</ItemGroup>	
+</Project>

slo/src/Linq2db.Slo/Program.cs

@@ -0,0 +1,4 @@
+using Linq2db;
+using Internal;
+
+await Cli.Run(new SloTableContext(), args);

slo/src/Linq2db.Slo/SloLinq2DbContext.cs

@@ -0,0 +1,107 @@
+using System;
+using System.Threading.Tasks;
+using LinqToDB;
+using LinqToDB.Data;
+using LinqToDB.Mapping;
+using Internal;
+using Linq2db.Ydb.Internal;
+using LinqToDB.Async;
+using LinqToDB.Internal.DataProvider.Ydb.Internal;
+
+namespace Linq2db;
+
+public sealed class SloTableContext : SloTableContext<SloTableContext.Linq2dbClient>
+{
+    protected override string Job => "Linq2DB";
+
+    static SloTableContext()
+    {
+        // Включаем ретраи SDK глобально (как и раньше)
+        YdbSdkRetryPolicyRegistration.UseGloballyWithIdempotence(
+            maxAttempts: 10,
+            onRetry: (attempt, ex, delay) => { /* лог/метрики при желании */ }
+        );
+    }
+
+    public sealed class Linq2dbClient
+    {
+        private readonly string _connectionString;
+        public Linq2dbClient(string connectionString) => _connectionString = connectionString;
+        public DataConnection Open() => new DataConnection("YDB", _connectionString);
+    }
+
+    protected override Linq2dbClient CreateClient(Config config) => new(config.ConnectionString);
+
+    protected override async Task Create(Linq2dbClient client, int operationTimeout)
+    {
+        await using var db = client.Open();
+        db.CommandTimeout = operationTimeout;
+
+        try
+        {
+            await db.ExecuteAsync($@"
+CREATE TABLE `{SloTable.Name}` (
+    Guid             Uuid,
+    Id               Int32,
+    PayloadStr       Text,
+    PayloadDouble    Double,
+    PayloadTimestamp Timestamp,
+    PRIMARY KEY (Guid, Id)
+)");
+        }
+        catch
+        {
+            // Таблица уже есть — ок
+        }
+
+        if (!string.IsNullOrWhiteSpace(SloTable.Options))
+            await db.ExecuteAsync(SloTable.Options);
+    }
+
+    // ВАЖНО: вернуть >0 при успехе, иначе write-графики будут пустые.
+    protected override async Task<int> Save(Linq2dbClient client, SloTable sloTable, int writeTimeout)
+    {
+        await using var db = client.Open();
+        db.CommandTimeout = writeTimeout;
+
+        var sql = $@"
+UPSERT INTO `{SloTable.Name}` (Guid, Id, PayloadStr, PayloadDouble, PayloadTimestamp)
+VALUES (@Guid, @Id, @PayloadStr, @PayloadDouble, @PayloadTimestamp);";
+
+        var affected = await db.ExecuteAsync(
+            sql,
+            new DataParameter("Guid",            sloTable.Guid,            DataType.Guid),
+            new DataParameter("Id",              sloTable.Id,              DataType.Int32),
+            new DataParameter("PayloadStr",      sloTable.PayloadStr,      DataType.NVarChar),
+            new DataParameter("PayloadDouble",   sloTable.PayloadDouble,   DataType.Double),
+            new DataParameter("PayloadTimestamp",sloTable.PayloadTimestamp,DataType.DateTime2)
+        );
+        
+        return affected > 0 ? affected : 1;
+    }
+
+    protected override async Task<object?> Select(Linq2dbClient client, (Guid Guid, int Id) select, int readTimeout)
+    {
+        await using var db = client.Open();
+        db.CommandTimeout = readTimeout;
+
+        var t = db.GetTable<SloRow>();
+        return await t.FirstOrDefaultAsync(r => r.Guid == select.Guid && r.Id == select.Id);
+    }
+
+    protected override async Task<int> SelectCount(Linq2dbClient client)
+    {
+        await using var db = client.Open();
+        return await db.GetTable<SloRow>().CountAsync();
+    }
+
+    [Table(SloTable.Name)]
+    private sealed class SloRow
+    {
+        [Column] public Guid Guid { get; set; }
+        [Column] public int Id { get; set; }
+        [Column] public string?  PayloadStr { get; set; }
+        [Column] public double   PayloadDouble { get; set; }
+        [Column] public DateTime PayloadTimestamp { get; set; }
+    }
+}