How to get columns' sql type queried by sqlalchemy

问题

For example:

sql = "select a, b, c from tb"
rs = engine.execute(sql)

the columns' types in rs.cursor.description are python types, not sql types, so how can I get columns' sql types?

来源：https://stackoverflow.com/questions/44692892/how-to-get-columns-sql-type-queried-by-sqlalchemy