FEAT: Adding getInfo

[jahnvi480]

Work Item / Issue Reference

AB#34911

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Summary

This pull request adds new functionality for retrieving ODBC driver and data source information and improves the handling of ODBC constants throughout the codebase. The main changes include implementing a Python-accessible getinfo method for connections, introducing a comprehensive set of ODBC info constants, and wiring up the underlying C++ bindings to support these features.

ODBC Driver and Data Source Information Retrieval

• Added a getinfo method to the Python Connection class, allowing users to query driver/data source information using ODBC info types. This method is exposed via the C++ bindings and handles type conversion for returned values.

• Implemented the underlying C++ logic in Connection::getInfo and ConnectionHandle::getInfo to call ODBC's SQLGetInfo, manage buffer sizing, and convert results to appropriate Python types (string, integer, etc.).

• Registered the ODBC SQLGetInfo function pointer in the driver bindings and ensured it is loaded and validated at runtime.

ODBC Constants and Usage

• Added a new GetInfoConstants enum to mssql_python/constants.py, providing a comprehensive set of ODBC info type constants for use with the getinfo method and other driver interactions.

• Updated Python and test code to import and use the new GetInfoConstants enum for driver information queries.

Connection Properties

• Introduced a new searchescape property on the Python Connection class to retrieve the ODBC search pattern escape character using the new getinfo method, with robust error handling and fallback behavior.

Miscellaneous

• Minor C++ macro addition for SQLSMALLINT maximum value, used in buffer sizing for ODBC calls.

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These changes collectively enable advanced introspection of the ODBC driver and data source capabilities, improve code maintainability through centralized constants, and enhance error handling and type safety in driver interactions.

[sumitmsft]

Added some comments

The base branch was changed.

[Copilot]

Pull Request Overview

This pull request adds comprehensive support for retrieving ODBC driver and data source information through a new getinfo method on the Connection class. It implements the ODBC SQLGetInfo functionality with complete C++ bindings and provides extensive test coverage for various information types and data formats.

• Added getinfo method to Connection class with comprehensive ODBC information retrieval capabilities
• Implemented C++ backend with SQLGetInfo bindings and appropriate type handling for strings and integers
• Enhanced testing with decimal separator functionality, lowercase column handling, and search pattern escape character support

Reviewed Changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
tests/test_004_cursor.py	Added comprehensive tests for lowercase attribute and decimal separator functionality
tests/test_003_connection.py	Added extensive getinfo tests covering driver info, SQL support, limits, and search escape functionality
tests/test_001_globals.py	Added tests for lowercase and decimal separator global settings
mssql_python/row.py	Enhanced Row class with decimal separator support and lowercase column name handling
mssql_python/pybind/ddbc_bindings.h	Added SQLGetInfo function pointer typedef and decimal separator declarations
mssql_python/pybind/ddbc_bindings.cpp	Implemented SQLGetInfo loading, decimal separator handling, and getinfo C++ method binding
mssql_python/pybind/connection/connection.h	Added getInfo method declarations to Connection and ConnectionHandle classes
mssql_python/pybind/connection/connection.cpp	Implemented comprehensive getInfo method with proper type handling and buffer management
mssql_python/cursor.py	Updated cursor to support lowercase column names and improved Row object creation
mssql_python/constants.py	Added comprehensive GetInfoConstants enum with 130+ ODBC information type constants
mssql_python/connection.py	Added getinfo method and searchescape property to Connection class
mssql_python/init.py	Added global settings, decimal separator functions, and lowercase attribute support

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