dotnet/SqlClient

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Microsoft.Data.SqlClient provides database connectivity to SQL Server for .NET applications.

Stars: 989
Forks: 340
Open beginner issues: 0
Indexed issues: 241
Avg merge: 4d 19h
Merged PRs (30d): 72

Dominant language: C#
License: MIT
Last GitHub push: Sep 14, 2026
Latest indexed: Sep 15, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed

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240 open issues indexed

Add support for vector datatype for it's usage with TVP and SqlDataRecord Open

Area\Vector

dotnet/SqlClient#3440 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Vector Feature enhancements Open

Area\Vector

dotnet/SqlClient#3444 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Vector Datatype TVP support Open

Area\Vector

dotnet/SqlClient#3449 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
Vector Datatype support for SqlDataRecord Open

Area\Vector

dotnet/SqlClient#3450 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[PLACEHOLDER] Improve Async Pathways in Connectivity APIs Open

dotnet/SqlClient#3459 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Why sqlbulkcopy failed when collation are differents only with sqlserver sources Open

dotnet/SqlClient#3479 · 7 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Reading JSON column appears to be 5x to 8x slower than reading VARCHAR(MAX) column Open

Performance :chart_with_upwards_trend:

dotnet/SqlClient#3499 · 4 comments · 1 reaction · 1 assignee · Indexed Sep 15, 2026
Provide an API for raw binary BULK operations (export/import) in native format Open

dotnet/SqlClient#3510 · 16 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Microsoft.Data.SqlClient.SNI files ends up in root folder Open

dotnet/SqlClient#3525 · 6 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
SqlConnection.InfoMessage handler does not receive all info messages when SqlCommand.ExecuteReader is used to execute a query Open

Area\Documentation

dotnet/SqlClient#3541 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Improve error reporting when an application fails to obtain a connection from the pool Open

Approved

dotnet/SqlClient#3545 · 1 comment · 1 reaction · 1 assignee · Indexed Sep 15, 2026
Issue using Microsoft.Data.SqlClient with PowerShell 7.5.2 Open

Area\Documentation Up-for-Grabs :raised_hands:

dotnet/SqlClient#3577 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Address stress tests failures and enable them in CI by default Open

Area\Tests

dotnet/SqlClient#3578 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Always Encrypted support needed for API cursor positional update Open

dotnet/SqlClient#3580 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Audit Best-effort Cleanup Code Open

Code Health :pill:

dotnet/SqlClient#3581 · 1 comment · 2 reactions · 0 assignees · Indexed Sep 15, 2026
Add select docs to TdsParser methods per #3555 Open

Code Health :pill:

dotnet/SqlClient#3584 · 0 comments · 1 reaction · 1 assignee · Indexed Sep 15, 2026
SqlClient should provide better troubleshooting information when using Entra authentication (esp. w.r.t. Azure SQL vCore changes) Open

dotnet/SqlClient#3600 · 1 comment · 1 reaction · 0 assignees · Indexed Sep 15, 2026
Make test summary names more descriptive Open

Area\Engineering Up-for-Grabs :raised_hands:

dotnet/SqlClient#3602 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
Fix commented-out Debug.Assert()s that are failing Open

Code Health :pill: Up-for-Grabs :raised_hands:

dotnet/SqlClient#3604 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Add a separate timeout value for transaction operations such as commit Open

dotnet/SqlClient#3635 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Unhandled native exception by SniNativeWrapper.SniOpenSyncEx / SNI_Spn::MakeSpn when opening a connection Open

dotnet/SqlClient#3661 · 6 comments · 1 reaction · 1 assignee · Indexed Sep 15, 2026
[Tests] Setup needed for Connection Pool reliability testing Open

Area\Connection Pooling Area\Tests

dotnet/SqlClient#3667 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Add SqlBulkCopyOptions.AnsiWarnings Property Open

dotnet/SqlClient#3669 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Feature | Async friendly Always Encrypted support Open

Approved

dotnet/SqlClient#3672 · 2 comments · 2 reactions · 1 assignee · Indexed Sep 15, 2026
MARS Sessions Aren't Closed on Return To Pool Open

dotnet/SqlClient#3682 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
MarsScenarioClientJoin test failing due to encoding mismatch Open

Area\Tests Repro Available :heavy_check_mark:

dotnet/SqlClient#3685 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Support SqlDataSourceEnumerator on Linux Open

Approval Needed

dotnet/SqlClient#3700 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Consider custom xUnit test start/end logging Open

Area\Tests

dotnet/SqlClient#3701 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
Unobserved null reference exception Open

Area\Async Intermittent :fearful: Regression :boom:

dotnet/SqlClient#3720 · 7 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
SqlDataAdapter.Fill throws exception with the new VECTOR data type. Open

Area\Vector

dotnet/SqlClient#3723 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Improve samples by building them Open

Up-for-Grabs :raised_hands:

dotnet/SqlClient#3725 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Feature: SqlAuthenticationProvider API change proposal Open

Breaking Change :hammer:

dotnet/SqlClient#3728 · 1 comment · 2 reactions · 0 assignees · Indexed Sep 15, 2026
ChannelDbConnectionPool's async ordering test is flaky Open

ActiveIssue Area\Tests

dotnet/SqlClient#3730 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Revisit support for globalization invariant mode Open

Area\Documentation

dotnet/SqlClient#3742 · 0 comments · 5 reactions · 0 assignees · Indexed Sep 15, 2026
Managed SNI named pipe connections ignore command timeout Open

ActiveIssue Area\Tests

dotnet/SqlClient#3755 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
Remove explicit dependency on System.Text.Json for modern .net Open

dotnet/SqlClient#3766 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Test | SqlConnectionReliabilityTests are flaky Open

ActiveIssue Area\Tests

dotnet/SqlClient#3821 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
GetSchema("DataTypes") does not return entries for JSON and VECTOR types Open

dotnet/SqlClient#3833 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
SqlCommand: EnableOptimizedParameterBinding throws error when used together with Prepare Open

Area\Documentation

dotnet/SqlClient#3835 · 5 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
[5.1] Flaky Test: TransientFault_IgnoreServerProvidedFailoverPartner_ShouldConnectToUserProvidedPartner Open

Area\Tests

dotnet/SqlClient#3855 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Test | Add test coverage for #3857 : NullReferenceException issue when using SqlDataAdapter with Always Encrypted and UpdateBatchSize > 1 Open

Area\Tests Repro Available :heavy_check_mark:

dotnet/SqlClient#3876 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Test | [6.1] Enable tests for ManagedInstance that require additional permissions for user Open

Area\Tests

dotnet/SqlClient#3880 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
SqlDataRecord.SetBytes fails to set length, incorrectly preserving data from a previous call Open

dotnet/SqlClient#3957 · 7 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
Remove dependencies to Microsoft.IdentityModel from main SqlClient package Open

Breaking Change :hammer:

dotnet/SqlClient#4017 · 8 comments · 23 reactions · 0 assignees · Indexed Sep 15, 2026
SqlBulkCopy loses SqlMoney type identity when writing sql_variant columns Open

Area\Sql Bulk Copy Repro Available :heavy_check_mark:

dotnet/SqlClient#4040 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Raise exception on calling `SqlClientFactory.Instance` from facade assembly Open

dotnet/SqlClient#4081 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
SqlDataReader async read throws inconsistent exception types on disposal (IOException vs InvalidOperationException) Open

Public API :new:

dotnet/SqlClient#4088 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Win32Exception ExecuteDbDataReaderAsync Open

Area\Async Performance :chart_with_upwards_trend:

dotnet/SqlClient#4094 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 15, 2026
SqlConnection doesn't restore database in the new session if connection is lost Open

dotnet/SqlClient#4108 · 6 comments · 0 reactions · 2 assignees · Indexed Sep 15, 2026
SNI loading issues Open

Area\Native SNI

dotnet/SqlClient#4129 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026

dotnet/SqlClient

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