Bulk Copy Handles Decimal Inconsistently Compared with Normal Queries #457

Describe the bug

Trying to insert into a Decimal column with the new bulk_copy can throw an exception regarding mismatched decimal scale, whereas a normal insert will succeed and automatically deal with the issue. I would like to see bulk_copy work similarly and seamlessly.

To reproduce

import mssql_python
from decimal import Decimal

conn = mssql_python.connect([conn string], autocommit=True)
cur = conn.cursor()
cur.execute('create table dectest (d decimal(10, 2));')

# This next line works fine
cur.execute('insert into dectest values (?)', Decimal('123.456'))

# This line fails with the below exception
cur.bulkcopy('dectest', (Decimal('123.456'),))

Exception message

ValueError: Input decimal scale 3 exceeds target scale 2

Expected behavior

The bulkcopy should succeed and the value should be automatically rounded as it is in the insert.