FEAT: Support Emojis for data types

[gargsaumya]

Work Item / Issue Reference

AB#37664

GitHub Issue: #<ISSUE_NUMBER>

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Summary

This pull request improves Unicode string handling in the SQL type mapping logic and adds comprehensive tests for round-tripping emoji and special characters in the database. The main focus is on ensuring that Unicode strings, including those with emojis and special characters, are correctly mapped and stored in SQL Server.

Unicode string mapping improvements:

• Updated the _map_sql_type method in cursor.py to use the UTF-16 code unit length for Unicode string parameters instead of the Python string length, ensuring correct sizing for both long and short Unicode strings. [1] [2]

Testing enhancements:

• Added a new test test_emoji_round_trip in test_004_cursor.py to verify that various emoji, accented, and non-Latin characters can be inserted and retrieved accurately from the database, improving coverage for Unicode edge cases.

[Copilot]

Pull Request Overview

This pull request enhances Unicode string handling in the SQL type mapping logic to properly support emojis and special characters. The key improvement addresses the incorrect sizing calculation for Unicode strings by using UTF-16 code unit length instead of Python string length.

• Updated _map_sql_type method to calculate UTF-16 code unit length for Unicode parameters
• Added comprehensive test coverage for emoji and special character round-trip operations

Reviewed Changes

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

File	Description
mssql_python/cursor.py	Fixed Unicode string length calculation by using UTF-16 encoding length instead of Python string length
tests/test_004_cursor.py	Added comprehensive test for emoji and special character round-trip database operations