[Sqlalchemy-tickets] Issue #4062: pyodbc can't do rowcount with OUTPUT inserted.name (zzzeek/sqlalchemy)

[Michael B. <iss...@bi...>]

New issue 4062: pyodbc can't do rowcount with OUTPUT inserted.name
https://bitbucket.org/zzzeek/sqlalchemy/issues/4062/pyodbc-cant-do-rowcount-with-output

Michael Bayer:

```
#!python

from sqlalchemy import *
from sqlalchemy.orm import *
from sqlalchemy.ext.declarative import declarative_base

Base = declarative_base()

class A(Base):
    __tablename__ = 'a'
    name = Column(String(50), primary_key=True)

e = create_engine("mssql+pyodbc://scott:tiger^5HHH@mssql2017:1433/test?driver=ODBC+Driver+13+for+SQL+Server", echo=True)
Base.metadata.drop_all(e)
Base.metadata.create_all(e)

s = Session(e)

a1 = A(name='a1')
s.add(a1)

s.commit()

a1.name = A.name + '2'
s.commit()
```


this hits return_defaults() and then fails on rowcount.  need a new dialect flag.