FEAT: Complex Datatype support-XML

[gargsaumya]

Work Item / Issue Reference

AB#38821

GitHub Issue: #<ISSUE_NUMBER>

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Summary

This pull request adds comprehensive support for the SQL Server XML data type to the Python MSSQL driver, ensuring proper handling for insertion, retrieval, batching, and streaming of XML data. It also introduces a suite of tests to verify correct XML behavior, including edge cases like empty, large, and malformed XML values.

MSSQL Driver Enhancements

• Added support for the SQL_SS_XML data type throughout the driver, including binding, fetching, and row size calculations, so that XML columns are handled correctly during data operations. [1] [2] [3] [4] [5]
• Updated logic in FetchMany_wrap and FetchAll_wrap to treat XML columns as LOBs, enabling efficient streaming for large XML values. [1] [2]

Test Coverage for XML Support

• Added multiple tests in tests/test_004_cursor.py to verify XML handling, including basic insert/fetch, empty/null values, large XML streaming, batch inserts, and error handling for malformed XML input.

[Copilot]

Pull Request Overview

This pull request adds comprehensive support for the SQL Server XML data type to the Python MSSQL driver. The implementation includes proper handling for XML data binding, fetching, streaming, and batching operations.

• Added SQL_SS_XML data type support throughout the driver core
• Updated LOB handling logic to treat XML columns as streamable large objects
• Created comprehensive test suite covering XML operations and edge cases

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
mssql_python/pybind/ddbc_bindings.cpp	Added XML data type constant and integrated XML handling into column binding, fetching, and streaming operations
tests/test_004_cursor.py	Added comprehensive test suite for XML functionality including basic operations, edge cases, and error handling

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[github-actions]

📊 Code Coverage Report

🔥 Diff Coverage 100%

🎯 Overall Coverage 74%

📈 Total Lines Covered: 4197 out of 5615 📁 Project: mssql-python

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Diff Coverage

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

• mssql_python/pybind/ddbc_bindings.cpp (100%)

Summary

• Total: 10 lines
• Missing: 0 lines
• Coverage: 100%

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📋 Files Needing Attention

📉 Files with overall lowest coverage (click to expand)

mssql_python.pybind.connection.connection.cpp: 68.3%
mssql_python.ddbc_bindings.py: 68.5%
mssql_python.pybind.ddbc_bindings.cpp: 69.5%
mssql_python.cursor.py: 79.7%
mssql_python.connection.py: 81.7%
mssql_python.helpers.py: 84.7%
mssql_python.auth.py: 85.3%
mssql_python.type.py: 86.8%
mssql_python.pooling.py: 87.5%
mssql_python.exceptions.py: 90.4%

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[sumitmsft]

Just one comment, otherwise LGTM

[bewithgaurav]

in line with sumit's comment - needs some documentation only, approving from my end