show printed messages inside stored procedure - sql-server

Question

is it possible to see stdout (or log) T-SQL PRINT messages embedded in stored procedures when executed using sqlalchemy?
--edit--
It looks like pyodbc added a way to retrieve messages from a cursor for this very reason and it has been merged to master. I still cant figure out how to get this to bubble up to sqlalchemy
https://github.com/mkleehammer/pyodbc/pull/765#
--endedit--
I tried this adding echo=True to engine and setting a log level to debug but I can not see anything
this is how I am executing the usp
import sqlalchemy as sa
import logging
logging.basicConfig()
logger = logging.getLogger("sqlalchemy.engine")
logger.setLevel(logging.DEBUG)
engine = sa.create_engine(target_uri, echo=True)
statement = sa.sql.text(f"EXEC {usp_schema}.{usp_name}")
with engine.begin() as cnxn:
cnxn.execute(statement)
CREATE PROCEDURE dbo.usp_do_stuff
BEGIN
BEGIN TRAN
PRINT 'DELETE STAGE'
PRINT 'LOAD STAGE'
PRINT 'CLEAN STAGE'
PRINT 'TRANSPORT STAGE'
END TRAN
END;

Answer 1

https://github.com/mkleehammer/pyodbc/pull/765
has only recently been merged (2021-01-21) and SQLAlchemy's mssql+pyodbc:// dialect does not know anything about it yet. If you would like to see support for that feature added to SQLAlchemy then please open a feature request here.
In the meantime, the workaround is to install pyodbc from the current master branch …
pip install git+https://github.com/mkleehammer/pyodbc.git
… and then use a .raw_connection() to execute the SP and retrieve the messages:
"""existing stored procedure:
CREATE PROCEDURE [dbo].[usp_do_stuff]
AS
BEGIN
BEGIN TRANSACTION
PRINT 'DELETE STAGE'
PRINT 'LOAD STAGE'
PRINT 'CLEAN STAGE'
PRINT 'TRANSPORT STAGE'
COMMIT TRANSACTION
END
"""
cnxn = engine.raw_connection()
crsr = cnxn.cursor()
crsr.execute("EXEC usp_do_stuff")
print(crsr.messages)
while crsr.nextset():
print(crsr.messages)
"""
[('[01000] (0)', '[Microsoft][ODBC Driver 17 for SQL Server][SQL Server]DELETE STAGE')]
[('[01000] (0)', '[Microsoft][ODBC Driver 17 for SQL Server][SQL Server]LOAD STAGE')]
[('[01000] (0)', '[Microsoft][ODBC Driver 17 for SQL Server][SQL Server]CLEAN STAGE')]
[('[01000] (0)', '[Microsoft][ODBC Driver 17 for SQL Server][SQL Server]TRANSPORT STAGE')]
"""