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1.0.19221.1-Preview.md

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Release Notes

Microsoft.Data.SqlClient 1.0.19221.1-Preview released 8 August 2019

This update brings the below changes over the previous preview release:

Added

  • Localization Support for NetFx resources.
  • Added buildTransitive\ folder to SNI.dll library to define build assets transitive behavior - Fixes #137.

.Net Framework

  • Added support for Active Directory Interactive (Multi-Factor Authentication) and replaced the dependency on ADAL to MSAL (Microsoft.Identity.Client). The NetFx driver now supports the below modes of Azure Active Directory authentication:
    • Active Directory Password
    • Active Directory Integrated
    • Active Directory Interactive

.Net Core

  • Added support for Active Directory Password Authentication with MSAL (Microsoft.Identity.Client) as a dependency. The NetCore driver now supports the below modes of Azure Active Directory authentication:
    • Active Directory Password

Fixed

  • Fixed ExecuteReaderAsync API behavior that did not close the connection with CommandBehavior.CloseConnection - Fixes #18, #129 and related issues.
  • Fixed Broken Pipe IO Exception errors - Fixes #20.
  • Fixed Bulk Copy behavior with Always Encrypted columns - Fixes #121.
  • Modified SqlClientDiagnosticListenerExtensions to include Timestamp in WriteCommandBefore API - Fixes #101 and #59.
  • Fixed SqlEnvChangePool thread safety bug - Ported CoreFx#36735.

Changes

.NET Core

  • Removed remaining System.Data.SqlClient references.
  • Updated Tests to better clean up resources and fixed a few failing tests.
  • Changed to using Rent Buffers instead of transient ones when streaming data to the database - Ported CoreFx#35927.
  • Cleaned up string.Format / SR.Format usage - Ported CoreFx#35777.
  • Removed primitive boxing in SqlDataReader.GetFieldValue - Ported CoreFx#34999.
  • Removed stale warning 420 pragmas - Ported CoreFx#35023.
  • Manual Test fixes and documentation updates - Ported CoreFx#34546.

.NET Framework

  • Replaced calls from ADAL to MSAL (Microsoft.Identity.Client) for Azure Active Directory Authentication.
  • Source file headers changed for open sourcing code.
  • Cleaned up string.Format / SR.Format usage.

Target Platform Support

  • .NET Framework 4.6+
  • .NET Core 2.1+ (Windows x86, Windows x64, Linux, macOS)
  • .NET Standard 2.0+ (Windows x86, Windows x64, Linux, macOS)

Dependencies

.NET Framework

  • System.Data.Common 4.3.0
  • Microsoft.Data.SqlClient.SNI 1.0.19221.2-Preview
  • Microsoft.Identity.Client 3.0.8

.NET Core

  • Microsoft.Win32.Registry 4.5.0
  • runtime.native.System.Data.SqlClient.sni 4.4.0
  • System.Security.Principal.Windows 4.5.0
  • System.Text.Encoding.CodePages 4.5.0
  • System.Configuration.ConfigurationManager 4.5.0
  • Microsoft.Identity.Client 3.0.8

.NET Standard

  • Microsoft.Win32.Registry 4.5.0
  • runtime.native.System.Data.SqlClient.sni 4.4.0
  • System.Buffers 4.4.0
  • System.Diagnostics.DiagnosticSource 4.5.0
  • System.Memory 4.5.1
  • System.Security.Principal.Windows 4.5.0
  • System.Text.Encoding.CodePages 4.5.0
  • System.Configuration.ConfigurationManager 4.5.0
  • Microsoft.Identity.Client 3.0.8

New Features

New features over .NET Framework 4.7.2 System.Data.SqlClient.

  • Data Classification - Available in Azure SQL Database and Microsoft SQL Server 2019 since CTP 2.0.
  • UTF-8 support - Available in Microsoft SQL Server SQL Server 2019 since CTP 2.3.

New features over .NET Core 2.2 System.Data.SqlClient.

  • Data Classification - Available in Azure SQL Database and Microsoft SQL Server 2019 since CTP 2.0.
  • UTF-8 support - Available in Microsoft SQL Server SQL Server 2019 since CTP 2.3.
  • Always Encrypted - Always Encrypted is available in Microsoft SQL Server 2016 and higher.
  • Authentication: Active Directory Password authentication mode.

Known Issues

  • User Data Types (UDTs) may not work with Microsoft.Data.SqlClient.

Data Classification

Data Classification brings a new set of APIs exposing read-only Data Sensitivity and Classification information about objects retrieved via SqlDataReader when the underlying source supports the feature and contains metadata about data sensitivity and classification:

public class SqlDataReader
{
    public Microsoft.Data.SqlClient.DataClassification.SensitivityClassification SensitivityClassification
}

namespace Microsoft.Data.SqlClient.DataClassification
{
    public class ColumnSensitivity
    {
        public System.Collections.ObjectModel.ReadOnlyCollection<Microsoft.Data.SqlClient.DataClassification.SensitivityProperty> SensitivityProperties
    }
    public class InformationType
    {
        public string Id
        public string Name
    }
    public class Label
    {
        public string Id
        public string Name
    }
    public class SensitivityClassification
    {
        public System.Collections.ObjectModel.ReadOnlyCollection<Microsoft.Data.SqlClient.DataClassification.ColumnSensitivity> ColumnSensitivities
        public System.Collections.ObjectModel.ReadOnlyCollection<Microsoft.Data.SqlClient.DataClassification.InformationType> InformationTypes
        public System.Collections.ObjectModel.ReadOnlyCollection<Microsoft.Data.SqlClient.DataClassification.Label> Labels
    }
    public class SensitivityProperty
    {
        public Microsoft.Data.SqlClient.DataClassification.InformationType InformationType
        public Microsoft.Data.SqlClient.DataClassification.Label Label
    }
}

UTF-8 Support

UTF-8 support does not require any application code changes. These SqlClient changes simply optimize the communication between the client and server when the server supports UTF-8 and the underlying column collation is UTF-8. See the UTF-8 section under What's new in SQL Server 2019 preview.

Always Encrypted

In general, existing documentation which uses System.Data.SqlClient on .NET Framework and built-in column master key store providers should now work with .NET Core, too.

Authentication

Different authentication modes can be specified by using the Authentication connnection string option. For more information, see the documentation for SqlAuthenticationMethod.

Notes:

  • There is no key store provider for Azure Key Vault and Microsoft.Data.SqlClient at this time.
  • Always Encrypted with secure enclaves is not supported with Microsoft.Data.SqlClient.
  • Always Encrypted is only supported against .NET Framework and .NET Core targets. It is not supported against .NET Standard since .NET Standard is missing certain encryption dependencies.