ODBC Driver for SQL Server Updates & Release Notes

Version number: 18.7.1.1

Released: September 7, 2026

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Feature added: Vector data type

Details: Added support for the float16 vector data type.

Feature added: Connection string keywords

Details: Added MultipleActiveResultSets, FailoverPartner, WorkstationID, and ConnectTimeout connection string keywords.

Feature added: Enhanced routing

Details: Added load-balanced routing for Azure SQL Database Hyperscale named-replica reader endpoints.

Bug fixes: Bug fixes.

Version number: 17.11.1.1

Released: April 30, 2026

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Version number: 13.1

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Version number: 17.11.1.1

Released: April 30, 2026

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Features added:

• Install all features: Modify installer to install both features (Core and SDK) by default.
• Bug fixes.

Version number: 18.6.2.1
Released: March 31, 2026

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Feature added

Details

• Vector parameters. Improved handling of output and input/output vector parameters when using prepared statements.
• Server redirections. Supports Microsoft Fabric redirection scenarios that allow up to 10 server redirections per connection attempt.
• Bug fixes. Bug fixes.

Version number: 18.6.1.1
Released: December 17, 2025

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New data type

Added support for new Vector data type (float32). See Vector data type (ODBC) for usage and examples.

ConcatNullYieldsNull property

Added support for ConcatNullYieldsNull property as both a connection string property and a registry key option.

New distribution supported

Added x86 support on Windows ARM64.

Known issues in 18.6.1.1

Terminator issue in bcp_bind

When you use a terminator as the separator in bcp_bind for strings, two consecutive terminators in data can mean either a NULL value or an empty string. The ODBC driver can't distinguish between empty strings and null strings.

• Before the 18.6.1.1 release, the ODBC driver interpreted consecutive terminators (zero-length data) as empty strings.
• In the 18.6.1.1 release, the ODBC driver interprets zero-length data as a NULL value instead of an empty string.

Version number: 18.5.2.1

Released: September 26, 2025

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Feature added

Details

• Fixed potential crashes
  Avoid potential crashes caused by memory corruption.

Version number: 18.5.1.1

Released: March 17, 2025

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Version number: 18.5.1.1
Released: March 17, 2025

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Packet Size option

Expose the Packet Size as a connection string option.

Include Microsoft SQL Driver Authentication library (mssql-auth.dll) in the installer

Now included in the base driver installation, the installer installs and upgrades the Microsoft SQL Driver Authentication library.

Added three new languages

Added support for three new languages Czech, Polish, and Turkish.

Install all features

Modify installer to install both features (Core and SDK) by default.

Bug fixes.

Bug fixes.

Version number: 18.4.1.1
Released: July 31, 2024

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Feature added

Details

Microsoft Entra ID
Renamed all occurrences of "Azure Active Directory" to "Microsoft Entra ID". For more information, see New name for Azure Active Directory.

Bug fixes.

Bug fixes.

Version number: 18.3.3.1
Released: April 9, 2024

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Feature added

Details

Bug fixes

Bug fixes.

Security updates

KB5037571

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Version number: 17.10.6.1
Released: April 9, 2024

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Feature added

Details

• Bug fixes Bug fixes.
• Security updates KB5037570

Version number: 18.3.2.1

Released: October 10, 2023

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Feature added

Details

Bug fixes

Bug fixes.

Version number: 18.3.2.1

Released: October 10, 2023

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Feature added: Bug fixes

Details: Bug fixes.

Feature added: Security updates

Details: KB5037571.

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Version number: 17.10.5.1

Released: October 10, 2023

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Feature added

• Improved Performance — More efficient packet buffer memory allocation
• New Managed Identity (MSI) Authentication Support — Support for MSI authentication for Azure Arc and Azure Cloud Shell and updated to a newer Azure App Service API version

Bug fixes

• Bug fixes.