RELEASE: 1.16.0

[Gaurav Sharma (bewithgaurav)]

AB#49327

Summary

Prepares mssql-python 1.16.0 for release.

Enhancements

• Add Python 3.15 support and Row._mapping.
• Depend on stable-ABI mssql-python-rs 0.3.0 wheels instead of embedding Rust runtime files.
• Reduce overhead in Row construction, batch fetching, temporal conversion, result-set metadata, diagnostics, integer indexing, and fetchval() logging.

Bug Fixes

• Prevent Windows shutdown access violations and pooled empty transactions.
• Preserve BOM-like UTF-16 payload characters.
• Harden dynamic native logging and UDT parameter binding.
• Warn when setencoding() requests cannot be applied.
• Preserve Python-specific dependency markers in release locks.
• Correct bulk-copy timeout and identifier handling through mssql_py_core.

Version

• Bump mssql_python.__version__ and setup.py from 1.15.0 to 1.16.0.
• Replace the PyPI 1.15.0 highlights with the confirmed 1.16.0 inventory.

[github-actions]

PR Performance Report

✅ No regression detected

No consistent slowdowns detected across all 2 environments.

0 IMPROVEMENTS 0 SLOWDOWNS 2/2 ENVIRONMENTS

Coverage: 2 of 2 environments completed. Advisory result; does not block merging.

Performance diagnostics

Phase times are inclusive diagnostics and must not be added together. They identify where measured time changed, not why it changed.

No affected phases or call-count changes were recorded.

All database tasks and timings

Unix / SQL Server 2022

Database task	Before	After	Paired change	Result
Connection opening	10.854 ms	10.768 ms	-0.2%	no signal
SELECT queries	1.043 ms	1.035 ms	-4.0%	no signal
Row insertion	31.278 ms	31.334 ms	-0.3%	no signal
Executemany inserts	134.485 ms	135.099 ms	-1.2%	no signal
Fetch-all queries	120.516 ms	117.130 ms	-0.5%	no signal
Row-by-row fetching	12.765 ms	12.598 ms	-1.8%	no signal
Batched row fetching	111.737 ms	110.859 ms	-0.8%	no signal
Transaction commit and rollback	98.796 ms	99.457 ms	+0.4%	no signal
Arrow row fetching	89.844 ms	90.092 ms	-0.3%	no signal
100,000-row insertion	403.209 ms	405.355 ms	-0.6%	no signal
Row fetching in batches of 100	107.828 ms	108.532 ms	+1.2%	no signal
Row fetching in batches of 10,000	133.447 ms	133.659 ms	+1.9%	no signal
Repeated positional queries	29.795 ms	29.699 ms	-0.3%	no signal
Repeated named-parameter queries	32.057 ms	32.184 ms	+0.1%	no signal
Legacy 100,000-row insertion	307.836 ms	315.039 ms	+2.0%	no signal
Insertion with explicit input sizes	431.415 ms	437.407 ms	-0.5%	no signal
Joined aggregation queries	185.578 ms	184.494 ms	-1.2%	no signal
Large joined-result fetching	179.763 ms	177.327 ms	-1.6%	no signal
1.2-million-row fetching	3463.127 ms	3475.498 ms	-0.3%	no signal
Common table expression queries	5.617 ms	5.516 ms	-0.9%	no signal
256 KiB VARCHAR(MAX) / fetchall()	1.300 ms	1.272 ms	-3.2%	no signal
10,000 scalar values / fetchval() (debug disabled)	100.145 ms	101.210 ms	+0.6%	no signal

Unix / SQL Server 2025

Database task	Before	After	Paired change	Result
Connection opening	97.344 ms	96.846 ms	-0.5%	no signal
SELECT queries	1.078 ms	1.043 ms	-4.2%	no signal
Row insertion	36.129 ms	34.632 ms	-4.3%	no signal
Executemany inserts	153.182 ms	149.899 ms	-1.2%	no signal
Fetch-all queries	120.958 ms	120.728 ms	+1.9%	no signal
Row-by-row fetching	14.420 ms	15.450 ms	+6.4%	no signal
Batched row fetching	116.989 ms	117.525 ms	+0.6%	no signal
Transaction commit and rollback	116.231 ms	115.447 ms	-1.1%	no signal
Arrow row fetching	94.202 ms	93.247 ms	-1.3%	no signal
100,000-row insertion	440.166 ms	427.224 ms	-1.6%	no signal
Row fetching in batches of 100	121.081 ms	123.358 ms	+0.4%	no signal
Row fetching in batches of 10,000	136.312 ms	139.702 ms	+3.2%	no signal
Repeated positional queries	34.128 ms	33.865 ms	-0.5%	no signal
Repeated named-parameter queries	37.458 ms	37.218 ms	+1.7%	no signal
Legacy 100,000-row insertion	349.254 ms	344.414 ms	-1.5%	no signal
Insertion with explicit input sizes	492.739 ms	480.776 ms	-2.2%	no signal
Joined aggregation queries	159.606 ms	159.276 ms	-0.2%	no signal
Large joined-result fetching	180.041 ms	181.841 ms	+2.3%	no signal
1.2-million-row fetching	3487.411 ms	3469.802 ms	-0.4%	no signal
Common table expression queries	5.085 ms	5.062 ms	-0.9%	no signal
256 KiB VARCHAR(MAX) / fetchall()	1.446 ms	1.459 ms	+2.0%	no signal
10,000 scalar values / fetchval() (debug disabled)	107.126 ms	107.275 ms	+0.2%	no signal

Build and measurement details

ADO build 182400

PR head: b975c64434bdfddbcff31d374f49ba184330dd35
Base: d7a4a9928d00ebd88fcfae5a3fdd4dc5c5ae7d46
Measured merge: 173f304f0e30b5129be254deaa39ee32d8ee75c6

• Unix / SQL Server 2022: Python 3.12.3, x86_64, SQL 16.0.4295.3; 5 paired comparisons and 1 warmup.
• Unix / SQL Server 2025: Python 3.12.3, x86_64, SQL 17.0.5005.3; 5 paired comparisons and 1 warmup.

A consistent change requires more than 20% median paired movement, at least 1 ms between the median runtimes, and at least 80% of pairs exceeding the relative threshold in the same direction. A slowdown without enough pair agreement is reported as inconsistent.

The displayed change is the median of paired before-and-after ratios. It is not recalculated from the two displayed median runtimes.

Both revisions use profiling-enabled builds on the same agent and database, with alternating order and discarded warmups. Results are diagnostic and do not represent production-wheel latency.

Raw samples and logs are attached to the ADO run as profiler-* artifacts.

[Copilot]

🟡 Changes recommended

The PyPI highlights include an internal-only change and omit required Rust attribution.

2 open findings

• Add required mssql-python-rs attribution · New
• Remove internal release infrastructure from customer-facing highlights · New

What changed in this PR

Prepares mssql-python 1.16.0 for release.

Changes:

• Bumps package and runtime versions to 1.16.0.
• Replaces PyPI highlights with the 1.16.0 release inventory.

File	Description
setup.py	Updates package version.
mssql_python/​__init__.py	Updates runtime version.
PyPI_Description.md	Adds 1.16.0 release highlights.

🧠 Review effort: Balanced

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[Jahnvi Thakkar (jahnvi480)]

Release for mssql-python-odbc 18.6.2.2 is completed. Can you please add this pinned version in this same PR

[github-actions]

📊 Code Coverage Report

🔥 Diff Coverage 100%

🎯 Overall Coverage 85%

📈 Total Lines Covered: 9443 out of 11092 📁 Project: mssql-python

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Diff Coverage

Diff: main...HEAD, staged and unstaged changes

• mssql_python/init.py (100%)

Summary

• Total: 1 line
• Missing: 0 lines
• Coverage: 100%

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📋 Files Needing Attention

📉 Files with overall lowest coverage (click to expand)

mssql_python.pybind.performance_counter.hpp: 0.7%
mssql_python.pybind.logger_bridge.cpp: 57.9%
mssql_python.pybind.ddbc_bindings.h: 62.6%
mssql_python.pybind.logger_bridge.hpp: 70.8%
mssql_python.pybind.connection.connection_pool.cpp: 82.3%
mssql_python.pybind.connection.connection.cpp: 83.1%
mssql_python.logging.py: 86.2%
mssql_python.pooling.py: 90.1%
mssql_python.pybind.fetch_temporal.hpp: 92.1%
mssql_python.cursor.py: 92.5%

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🔗 Quick Links

⚙️ Build Summary	📋 Coverage Details
View Azure DevOps Build	Browse Full Coverage Report

[Copilot]

🟢 Approval recommended

Version metadata is consistent and the release notes align with the referenced merged changes.

0 open findings

2 resolved since last review

• Remove internal release infrastructure from customer-facing highlights
• Add required mssql-python-rs attribution

🧠 Review effort: Balanced

[Copilot]

🟡 Changes recommended

The stable-ABI release note incorrectly describes Python-version-specific wheel reduction as platform-specific.

1 open finding

• Clarify abi3 reduces Python-version-specific wheels, not platform variants · New

🧠 Review effort: Balanced

[Copilot]

🟢 Approval recommended

Version metadata is consistent and the release inventory matches the referenced merged changes.

0 open findings

1 resolved since last review

• Clarify abi3 reduces Python-version-specific wheels, not platform variants

🧠 Review effort: Balanced

[Copilot]

🔵 Needs a closer look

The release depends on unpublished mssql-python-odbc 18.6.2.2, and several release-note claims need correction.

0 open findings

Previously missed (3)

In code that hasn't changed since last review

Correct release-wheel attribution to include PR #838

PyPI_Description.md:42

This attributes both validation and release-wheel support to #817, but #817 added validation while #838 is the merged change that adds the CPython 3.15 release-wheel stages. Include #838 so the release note accurately traces the wheel claim.

Reframe provider selection as a 1.16 dependency change

PyPI_Description.md:45

Provider selection already shipped in v1.15.0: that tag exposes native_provider/get_native_provider_info(), documents the opt-in provider, and its release commit lists #730. Reframe this entry around the 1.16 change—the exact mssql-python-rs dependency now installs the existing optional provider—so the “what's new” section does not present prior-release functionality as new.

Remove unsupported performance claim without indexing benchmarks

PyPI_Description.md:52

The linked PR provides no indexing-specific benchmark, and its advisory performance run reports no affected phase or call-count change, so “Faster” is not supported by the available measurements. Use mechanism-only wording unless a focused positional-index benchmark demonstrates the claim.

🧠 Review effort: Balanced

[Copilot]

🟡 Changes recommended

Release notes need corrected Python 3.15 attribution and evidence-neutral indexing wording.

2 open findings

• Missing PR #838 attribution for release-wheel production · New
• Unsupported speedup claim lacks indexing benchmark · New

🧠 Review effort: Balanced