Backport Mysql 5.7 provider

Author: alex-kulakov

Orm/Xtensive.Orm.MySql/Sql.Drivers.MySql/v5_7/Compiler.cs

@@ -0,0 +1,57 @@
+// Copyright (C) 2022 Xtensive LLC.
+// This code is distributed under MIT license terms.
+// See the License.txt file in the project root for more information.
+// Created by: Alexey Kulakov
+// Created:    2022.02.03
+
+using Xtensive.Sql.Compiler;
+using Xtensive.Sql.Dml;
+
+namespace Xtensive.Sql.Drivers.MySql.v5_7
+{
+  internal class Compiler : v5_6.Compiler
+  {
+    /// <inheritdoc/>
+    public override void Visit(SqlQueryExpression node)
+    {
+      base.Visit(node);
+      using (context.EnterScope(node)) {
+        var wrapLeft = node.Left is SqlSelect sL
+           && (sL.OrderBy.Count > 0 || sL.HasLimit || sL.Lock != SqlLockType.Empty);
+        var wrapRight = node.Left is SqlSelect sR
+          && (sR.OrderBy.Count > 0 || sR.HasLimit || sR.Lock != SqlLockType.Empty);
+
+        context.Output.AppendText(translator.Translate(context, node, QueryExpressionSection.Entry));
+        if (wrapLeft) {
+          context.Output.AppendText("(");
+          node.Left.AcceptVisitor(this);
+          context.Output.AppendText(")");
+        }
+        else {
+          node.Left.AcceptVisitor(this);
+        }
+
+        context.Output.AppendText(translator.Translate(node.NodeType));
+        context.Output.AppendText(translator.Translate(context, node, QueryExpressionSection.All));
+
+        if (wrapLeft) {
+          context.Output.AppendText("(");
+          node.Right.AcceptVisitor(this);
+          context.Output.AppendText(")");
+        }
+        else {
+          node.Left.AcceptVisitor(this);
+        }
+
+        context.Output.AppendText(translator.Translate(context, node, QueryExpressionSection.Exit));
+      }
+    }
+
+    // Constructors
+
+    public Compiler(SqlDriver driver)
+      : base(driver)
+    {
+    }
+  }
+}

Orm/Xtensive.Orm.MySql/Sql.Drivers.MySql/v5_7/Driver.cs

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+// Copyright (C) 2022 Xtensive LLC.
+// This code is distributed under MIT license terms.
+// See the License.txt file in the project root for more information.
+// Created by: Alexey Kulakov
+// Created:    2022.02.03
+
+using Xtensive.Sql.Compiler;
+using Xtensive.Sql.Info;
+
+namespace Xtensive.Sql.Drivers.MySql.v5_7
+{
+  internal class Driver : MySql.Driver
+  {
+    protected override Sql.TypeMapper CreateTypeMapper()
+    {
+      return new TypeMapper(this);
+    }
+
+    protected override SqlCompiler CreateCompiler()
+    {
+      return new Compiler(this);
+    }
+
+    protected override SqlTranslator CreateTranslator()
+    {
+      return new Translator(this);
+    }
+
+    protected override Model.Extractor CreateExtractor()
+    {
+      return new Extractor(this);
+    }
+
+    protected override Info.ServerInfoProvider CreateServerInfoProvider()
+    {
+      return new ServerInfoProvider(this);
+    }
+
+    // Constructors
+
+    public Driver(CoreServerInfo coreServerInfo)
+      : base(coreServerInfo)
+    {
+    }
+  }
+}

Orm/Xtensive.Orm.MySql/Sql.Drivers.MySql/v5_7/Extractor.cs

@@ -0,0 +1,18 @@
+// Copyright (C) 2022 Xtensive LLC.
+// This code is distributed under MIT license terms.
+// See the License.txt file in the project root for more information.
+// Created by: Alexey Kulakov
+// Created:    2022.02.03
+
+namespace Xtensive.Sql.Drivers.MySql.v5_7
+{
+  internal class Extractor : v5_6.Extractor
+  {
+    // Constructors
+
+    public Extractor(SqlDriver driver)
+      : base(driver)
+    {
+    }
+  }
+}

Orm/Xtensive.Orm.MySql/Sql.Drivers.MySql/v5_7/ServerInfoProvider.cs

@@ -0,0 +1,18 @@
+// Copyright (C) 2022 Xtensive LLC.
+// This code is distributed under MIT license terms.
+// See the License.txt file in the project root for more information.
+// Created by: Alexey Kulakov
+// Created:    2022.02.03
+
+namespace Xtensive.Sql.Drivers.MySql.v5_7
+{
+  internal class ServerInfoProvider : v5_6.ServerInfoProvider
+  {
+    // Constructors
+
+    public ServerInfoProvider(SqlDriver driver)
+      : base(driver)
+    {
+    }
+  }
+}

Orm/Xtensive.Orm.MySql/Sql.Drivers.MySql/v5_7/Translator.cs

@@ -0,0 +1,41 @@
+// Copyright (C) 2022 Xtensive LLC.
+// This code is distributed under MIT license terms.
+// See the License.txt file in the project root for more information.
+// Created by: Alexey Kulakov
+// Created:    2022.02.03
+
+using System;
+using Xtensive.Sql.Compiler;
+using Xtensive.Sql.Dml;
+
+namespace Xtensive.Sql.Drivers.MySql.v8_0
+{
+  internal class Translator : v5_7.Translator
+  {
+    /// <inheritdoc/>
+    public override void Translate(IOutput output, SqlLockType lockType)
+    {
+      var forShare = lockType.Supports(SqlLockType.Shared);
+      var forUpdate = lockType.SupportsAny(SqlLockType.Update | SqlLockType.Exclusive);
+
+      if (!forShare && !forUpdate) {
+        throw new NotSupportedException($"Lock '{lockType.ToString(true)}' is not supported.");
+      }
+
+      _ = output
+        .Append(forShare ? "FOR SHARE" : "FOR UPDATE")
+        .Append(lockType.Supports(SqlLockType.SkipLocked)
+          ? " SKIP LOCKED"
+          : lockType.Supports(SqlLockType.ThrowIfLocked)
+            ? " NOWAIT"
+            : string.Empty);
+    }
+
+    // Constructors
+
+    public Translator(SqlDriver driver)
+      : base(driver)
+    {
+    }
+  }
+}

Orm/Xtensive.Orm.MySql/Sql.Drivers.MySql/v5_7/TypeMapper.cs

@@ -0,0 +1,18 @@
+// Copyright (C) 2003-2010 Xtensive LLC.
+// All rights reserved.
+// For conditions of distribution and use, see license.
+// Created by: Alena Mikshina
+// Created:    2013.12.30
+
+namespace Xtensive.Sql.Drivers.MySql.v5_6
+{
+  internal class TypeMapper : v5_5.TypeMapper
+  {
+    // Constructors
+
+    public TypeMapper(SqlDriver driver)
+      : base(driver)
+    {
+    }
+  }
+}