Support more ODBC Features

[kwent]

Hi,

Thanks for this piece of software.

Would be nice to extend it, its missing a ton of ODBC Features: https://docs.microsoft.com/en-us/sql/odbc/reference/syntax/odbc-api-reference

Top most feature needed i can think of are:

• get current schema connected to
• cancel a query (SQLCancel, SQLCancelHandle)
• get procedures (https://docs.microsoft.com/en-us/dotnet/framework/data/adonet/odbc-schema-collections)
• get indexes

Regards