dotnet/SqlClient

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

Stars: 990
Forks: 340
Open beginner issues: 4
Indexed issues: 255
Avg merge: 3d 1h
Merged PRs (30d): 62

Dominant language: C#
License: MIT
Last GitHub push: Sep 18, 2026
Latest indexed: Sep 15, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed

Beginner friendly Everything

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Retry async pool acquisition in the connection factory after pool shutdown Open

:bulb: Enhancement :new: Triage Needed

Difficulty 4/5 3-5 days Newbie friendliness 48/100

dotnet/SqlClient#4720 · 1 comment · Opened Sep 22, 2026
Ensure channel-pool shutdown reports shutdown rather than timeout Open

:new: Triage Needed

Difficulty 4/5 3-5 days Newbie friendliness 55/100

dotnet/SqlClient#4719 · 1 comment · Opened Sep 22, 2026
Connection pooling/Windows Impersonation issue under replenishment Open

dotnet/SqlClient#4717 · 1 comment · 1 reaction · 1 assignee · Opened Sep 21, 2026
[aw] SqlClient Issue Auto-Triage reported incomplete result Open

agentic-workflows

dotnet/SqlClient#4716 · 1 comment · 1 assignee · Opened Sep 21, 2026
ArgumentException after updating Microsoft.Data.SqlClient to 7.1.0 Open

Regression :boom:

dotnet/SqlClient#4715 · 8 comments · 2 reactions · 1 assignee · Opened Sep 21, 2026
7.1.0 regression: in-flight OpenAsync fails instantly with pool "Timeout expired" when ClearAllPools()/ClearPool() runs Open

Regression :boom:

Difficulty 4/5 3-5 days Newbie friendliness 48/100

dotnet/SqlClient#4714 · 3 comments · 1 reaction · 1 assignee · Opened Sep 20, 2026
Disable ICR separately from connect retry count Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

dotnet/SqlClient#4709 · 8 comments · Opened Sep 17, 2026
Fails to connect sql managed instance with Authentication=Active Directory Integrated Open

:bug: Bug! :new: Triage Needed

Difficulty 4/5 3-5 days Newbie friendliness 52/100

dotnet/SqlClient#4708 · Opened Sep 17, 2026
[aw] SqlClient Issue Auto-Triage exceeded daily AI credits budget Open

agentic-workflows

Difficulty 4/5 3-5 days Newbie friendliness 30/100

dotnet/SqlClient#4705 · 26 comments · 1 assignee · Opened Sep 17, 2026
[aw] SqlClient Issue Auto-Triage reported incomplete result Open

agentic-workflows

dotnet/SqlClient#4704 · 22 comments · 1 reaction · 1 assignee · Opened Sep 17, 2026
Build fails if developer's PowerShell profile sets the current directory Open

:bug: Bug! :new: Triage Needed

Difficulty 1/5 Under an hour Newbie friendliness 25/100

dotnet/SqlClient#4701 · 2 comments · Opened Sep 16, 2026
Deadlock when a cancelled OpenAsync enlists in an ambient TransactionScope (Pooling=false) Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

dotnet/SqlClient#4696 · 1 comment · 1 reaction · Opened Sep 16, 2026
[aw] SqlClient Issue Auto-Triage reported incomplete result Open

agentic-workflows

dotnet/SqlClient#4692 · 2 comments · 1 assignee · Opened Sep 15, 2026
Early cancellation of a table-lock-blocked INSERT can remain pending until holder release Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

dotnet/SqlClient#4691 · 2 comments · Opened Sep 15, 2026
Managed SNI + MARS: unobserved NullReferenceException in SniTcpHandle.ReceiveAsync when the physical connection is disposed while the demuxer is still receiving (reliable repro) Open

Repro Available :heavy_check_mark:

dotnet/SqlClient#4679 · 1 comment · 1 assignee · Opened Sep 11, 2026
SqlException.IsTransient returns false for TCP Provider error 35 (broken pipe) — transport-level failures should be considered transient Open

:bug: Bug! :new: Triage Needed

Difficulty 3/5 1-2 days Newbie friendliness 68/100

dotnet/SqlClient#4665 · 2 comments · Opened Sep 9, 2026
Enable UseOverallConnectTimeoutForPoolWait by default in 8.0 Open

Area\Connection Pooling

Difficulty 4/5 3-5 days Newbie friendliness 55/100

dotnet/SqlClient#4642 · 2 comments · 1 reaction · Opened Sep 3, 2026
Preserve the original exception when SqlDataReader teardown also times out Open

:bug: Bug! Area\Managed SNI

Difficulty 4/5 3-5 days Newbie friendliness 48/100

dotnet/SqlClient#4638 · 4 comments · Opened Sep 3, 2026
Improve the timeout error when closing an incompletely consumed SqlDataReader Open

:bug: Bug! Area\Managed SNI

Difficulty 4/5 3-5 days Newbie friendliness 55/100

dotnet/SqlClient#4639 · 2 comments · Opened Sep 3, 2026
Redesign configurable retry logic assembly loading (dedicated ALC and/or explicit registration API) Open

Area\Engineering

dotnet/SqlClient#4623 · 2 comments · 1 reaction · 1 assignee · Opened Sep 2, 2026
Support net462 in the perf test pipelines Open

Area\Engineering Performance :chart_with_upwards_trend:

Difficulty 4/5 3-5 days Newbie friendliness 52/100

dotnet/SqlClient#4618 · 2 comments · 1 reaction · Opened Aug 31, 2026
Perf harness: SetProcessAffinityMask called without ctypes argtypes, so Windows CPU pinning does not take effect Open

:new: Triage Needed Area\Engineering Performance :chart_with_upwards_trend:

Difficulty 2/5 1-3 hours Newbie friendliness 74/100

dotnet/SqlClient#4617 · 1 comment · Opened Aug 31, 2026
Modern PR pipeline does not exercise managed SNI for Unit/Functional tests Open

Area\Engineering

Difficulty 4/5 3-5 days Newbie friendliness 55/100

dotnet/SqlClient#4605 · 1 comment · 1 reaction · Opened Aug 27, 2026
Versioning script follow-ups deferred from #4602 Open

Area\Engineering

Difficulty 4/5 3-5 days Newbie friendliness 45/100

dotnet/SqlClient#4603 · 1 comment · Opened Aug 26, 2026
SqlConnectionInternal starts a fresh ConnectTimeout for in-open round trips instead of honoring the caller's remaining timeout Open

Area\Connectivity

Difficulty 4/5 3-5 days Newbie friendliness 45/100

dotnet/SqlClient#4582 · 2 comments · Opened Aug 24, 2026
Test coverage: non-SQL-Server TDS endpoints (Synapse dedicated + on-demand, Fabric DW, Dataverse) Open

Area\Tests

Difficulty 4/5 3-5 days Newbie friendliness 45/100

dotnet/SqlClient#4580 · 2 comments · 1 reaction · Opened Aug 24, 2026
WaitHandleDbConnectionPool: reclaimed connections never emit a soft disconnect, so activeSoftConnections drifts Open

Area\Connection Pooling

Difficulty 3/5 1-2 days Newbie friendliness 72/100

dotnet/SqlClient#4555 · 1 comment · Opened Aug 19, 2026
Support `ClientCertificate` keyword in Connection String Open

Approved

Difficulty 4/5 3-5 days Newbie friendliness 52/100

dotnet/SqlClient#4551 · 3 comments · Opened Aug 18, 2026
WaitHandle replacement activation failure loses the original pooled connection Open

:new: Triage Needed

dotnet/SqlClient#4548 · 2 comments · 1 assignee · Opened Aug 18, 2026
Feature | Surface batch information on the SqlClient diagnostic events Open

Area\Open Telemetry Up-for-Grabs :raised_hands:

Difficulty 4/5 3-5 days Newbie friendliness 56/100

dotnet/SqlClient#4545 · 3 comments · Opened Aug 16, 2026
Sync ExecuteReader on an STA thread deadlocks against a StateChange handler that marshals to the UI thread (OpenAsyncRetry path) Open

External :link:

Difficulty 2/5 1-3 hours Newbie friendliness 64/100

dotnet/SqlClient#4534 · 2 comments · 1 assignee · Opened Aug 12, 2026
Deprecate TransparentNetworkIPResolution and switch MultiSubnetFailover on by default Open

Approved

dotnet/SqlClient#4494 · 2 comments · 1 reaction · 1 assignee · Opened Jul 30, 2026
Support Memory<byte>/ReadOnlyMemory<byte> as SqlParameter.Value for binary/varbinary/image parameters Open

Approval Needed Design Review Needed Partner Approval Needed :handshake: Public API :new:

Difficulty 4/5 3-5 days Newbie friendliness 58/100

dotnet/SqlClient#4491 · 1 comment · 1 reaction · Opened Jul 30, 2026
Refactor enclave providers to separate enclave-type from attestation-mechanism (composition over inheritance) Open

Code Health :pill:

Difficulty 5/5 Over a week Newbie friendliness 35/100

dotnet/SqlClient#4480 · 2 comments · Opened Jul 28, 2026
SQLCommandBuilder.DeriveParameters() having trouble with StoredProc Parameters of Type JSON Open

Area\Json Repro Available :heavy_check_mark:

dotnet/SqlClient#4470 · 2 comments · 1 assignee · Opened Jul 22, 2026
Remove Azure.Identity from Microsoft.Data.SqlClient.Extensions.Azure Open

Breaking Change :hammer:

dotnet/SqlClient#4448 · 5 comments · 1 reaction · 1 assignee · Opened Jul 15, 2026
Always Encrypted modernisation/optimisation Open

Approval Needed

dotnet/SqlClient#4425 · 1 comment · 2 assignees · Opened Jul 5, 2026
Async cancellation sends no attention signal once the server has flushed an info message (RAISERROR ... WITH NOWAIT) Open

Area\Async Repro Available :heavy_check_mark:

dotnet/SqlClient#4424 · 2 comments · 1 reaction · 1 assignee · Opened Jul 3, 2026
Use RAII primitives to create database objects in existing tests Open

Approval Needed Area\Tests

dotnet/SqlClient#4419 · 1 comment · 2 assignees · Opened Jul 1, 2026
Feature | Trimming-compatible UDT deserialization Open

Approval Needed

dotnet/SqlClient#4413 · 7 comments · 1 assignee · Opened Jun 28, 2026
Azure Auth config parsing migration to extensions Open

Area\Azure Connectivity

Difficulty 5/5 Over a week Newbie friendliness 25/100

dotnet/SqlClient#4378 · 2 comments · Opened Jun 19, 2026
Tests | Additional test cases Open

Area\Tests

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

dotnet/SqlClient#4377 · 2 comments · Opened Jun 19, 2026
Null Reference Exception during command timeout Open

Area\Async

dotnet/SqlClient#4374 · 4 comments · 1 assignee · Opened Jun 18, 2026
Backport AOT-safe auth provider to release/7.0 branch Open

Area\Azure Connectivity Public API :new: Regression :boom:

dotnet/SqlClient#4349 · 1 comment · 1 assignee · Opened Jun 9, 2026
SqlDataReader ignores exceptions rethrown from CATCH block. Open

Repro Available :heavy_check_mark:

Difficulty 4/5 3-5 days Newbie friendliness 48/100

dotnet/SqlClient#4321 · 1 comment · Opened May 29, 2026
Configurable retry logic can retry SqlCommands that have a transaction Open

Repro Available :heavy_check_mark:

Difficulty 4/5 3-5 days Newbie friendliness 52/100

dotnet/SqlClient#4309 · 1 comment · Opened May 27, 2026
"Internal connection fatal error" from TdsParser.TryRun Open

Regression :boom:

dotnet/SqlClient#4299 · 8 comments · 1 reaction · 1 assignee · Opened May 20, 2026
Replace platform-specific builds with runtime OS selection Open

Code Health :pill:

dotnet/SqlClient#4239 · 3 comments · 1 assignee · Opened Apr 24, 2026
Add .NET 10 target Open

Area\Engineering

Difficulty 3/5 1-2 days Newbie friendliness 52/100

dotnet/SqlClient#4238 · 3 comments · Opened Apr 24, 2026
Bogus "The target principal name is incorrect" on connecting to "." Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

dotnet/SqlClient#4228 · 3 comments · Opened Apr 23, 2026

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