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//---------------------------------------------------------------------
// <copyright file="SqlVersion.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//
// @owner Microsoft
// @backupOwner Microsoft
//---------------------------------------------------------------------
namespace System.Data.SqlClient
{
using System.Data;
using System.Data.Entity;
using System.Globalization;
/// <summary>
/// This enum describes the current server version
/// </summary>
internal enum SqlVersion
{
/// <summary>
/// Sql Server 8
/// </summary>
Sql8 = 80,
/// <summary>
/// Sql Server 9
/// </summary>
Sql9 = 90,
/// <summary>
/// Sql Server 10
/// </summary>
Sql10 = 100,
// higher versions go here
}
/// <summary>
/// This class is a simple utility class that determines the sql version from the
/// connection
/// </summary>
internal static class SqlVersionUtils
{
/// <summary>
/// Get the SqlVersion from the connection. Returns one of Sql8, Sql9, Sql10
/// The passed connection must be open
/// </summary>
/// <param name="connection">current sql connection</param>
/// <returns>Sql Version for the current connection</returns>
internal static SqlVersion GetSqlVersion(SqlConnection connection)
{
System.Diagnostics.Debug.Assert(connection.State == ConnectionState.Open, "Expected an open connection");
int majorVersion = Int32.Parse(connection.ServerVersion.Substring(0, 2), CultureInfo.InvariantCulture);
if (majorVersion >= 10)
{
return SqlVersion.Sql10;
}
else if (majorVersion == 9)
{
return SqlVersion.Sql9;
}
else
{
System.Diagnostics.Debug.Assert(majorVersion == 8, "not version 8");
return SqlVersion.Sql8;
}
}
internal static string GetVersionHint(SqlVersion version)
{
switch(version)
{
case SqlVersion.Sql8:
return SqlProviderManifest.TokenSql8;
case SqlVersion.Sql9:
return SqlProviderManifest.TokenSql9;
case SqlVersion.Sql10:
return SqlProviderManifest.TokenSql10;
default:
throw EntityUtil.Argument(Strings.UnableToDetermineStoreVersion);
}
}
internal static SqlVersion GetSqlVersion(string versionHint)
{
if (!string.IsNullOrEmpty(versionHint))
{
switch (versionHint)
{
case SqlProviderManifest.TokenSql8:
return SqlVersion.Sql8;
case SqlProviderManifest.TokenSql9:
return SqlVersion.Sql9;
case SqlProviderManifest.TokenSql10:
return SqlVersion.Sql10;
}
}
throw EntityUtil.Argument(Strings.UnableToDetermineStoreVersion);
}
internal static bool IsPreKatmai(SqlVersion sqlVersion)
{
return sqlVersion == SqlVersion.Sql8 || sqlVersion == SqlVersion.Sql9;
}
}
}
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