mssql-python-rs

Native runtime for the mssql-python SQL Server and Azure SQL driver. Install and use mssql-python for the Python database API; this package supplies its native components:

• mssql_py_core — a PyO3 extension that implements the SQL Server TDS protocol in Rust. It backs high-throughput paths (such as bulk copy) for the mssql-python driver.
• mssqlodbc (alpha) — an ODBC driver for SQL Server, implemented in Rust. It exposes the native ODBC C API. It is under active development and validation for use as an opt-in backend for the mssql-python driver. It is not yet a complete general-purpose replacement for Microsoft ODBC Driver 18 for SQL Server.

Bulk-copy datetime strings

Bulk copy parses ISO datetime strings targeting DATETIME2 and DATETIMEOFFSET in Rust, preserving all seven fractional-second digits (100 ns precision). Both space and T separators and a trailing Z are supported on every supported Python version. Fractions longer than seven digits are rejected rather than silently truncated. The destination column's scale is applied by the TDS serializer, using the existing truncation behavior for lower scales. Python-compatible fractional forms such as 12000012 and 12:00:00:12 are retained; both represent 12:00:00.12.

DATETIME2 retains the local date and time when an offset is present. DATETIMEOFFSET preserves the offset and normalizes its wire timestamp to UTC; offsets must be whole minutes within -14:00 through +14:00, and both the local and UTC dates must be within years 1 through 9999. Offset fields are normalized before validation, matching Python (for example, +05:60 becomes +06:00). Strings without an offset continue to use UTC for DATETIMEOFFSET. Python datetime objects retain their existing microsecond resolution.

Platforms

Prebuilt wheels for CPython 3.10+:

• Windows — x64, and ARM64 (CPython 3.11+)
• macOS 15+ — universal2 (x86_64 + arm64)
• Linux — glibc (manylinux_2_28, manylinux_2_34) and musl (musllinux_1_2), on x86_64 and aarch64

The Linux wheels require system OpenSSL: 1.1 for manylinux_2_28, or 3 for manylinux_2_34 and musllinux_1_2 (libssl3 on Alpine). Windows and macOS do not require OpenSSL.

Native connection settings

For SDK authors integrating the native runtime, see the connection settings reference.

License

Licensed under the MIT License.