Support for Nullable Types in ClickHouse ODBC Driver

Why it matters

This feature enables the ClickHouse ODBC driver to correctly handle and represent Nullable data types, improving compatibility with applications that rely on ODBC for data access and ensuring accurate data retrieval when Nullable columns are involved.

How to use it

The support is included in the ODBCDriver2 output format of the ClickHouse ODBC driver. Users leveraging the ODBC interface will benefit from automatic handling of Nullable types without additional configuration.