The key part of the stack trace is: File "c:\Program Files\Anaconda2\lib\site-packages\sqlalchemy\dialects\mssql\base.py", line 1773, in _get_default_schema_name default_schema_name = connection.scalar(query)
...which is in this function: https://bitbucket.org/zzzeek/sqlalchemy/src/8d740d6bd6b8bcc061713443120c67e611cdcb34/lib/sqlalchemy/dialects/mssql/base.py?at=rel_1_1_11&fileviewer=file-view-default#base.py-1768 It's failing to fetch the single value that ought to come back from the query "SELECT schema_name()". I don't know anything about MSSQL or ODBC, but you could try poking around with pdb in the scalar() function: https://bitbucket.org/zzzeek/sqlalchemy/src/8d740d6bd6b8bcc061713443120c67e611cdcb34/lib/sqlalchemy/engine/result.py?at=rel_1_1_11&fileviewer=file-view-default#result.py-1212 Simon On Tue, Jul 4, 2017 at 2:39 PM, Paul Morel <paul.mo...@tartansolutions.com> wrote: > Mike, > > Sorry for the lack of information. Please find the rest of what you wanted > below. > > Full Stack Trace: > >> ---- Running Direct SQL Query >> Traceback (most recent call last): >> File "test.py", line 45, in <module> result = con.execute('SELECT * FROM >> EPO_MODELS') >> File "c:\Program >> Files\Anaconda2\lib\site-packages\sqlalchemy\orm\session.py",line 1139, in >> execute bind, close_with_result=True).execute(clause, params or {}) >> File "c:\Program >> Files\Anaconda2\lib\site-packages\sqlalchemy\orm\session.py",line 1003, in >> _connection_for_bind engine, execution_options) >> File "c:\Program >> Files\Anaconda2\lib\site-packages\sqlalchemy\orm\session.py",line 403, in >> _connection_for_bind conn = bind.contextual_connect() >> File "c:\Program >> Files\Anaconda2\lib\site-packages\sqlalchemy\engine\base.py",line 2112, in >> contextual_connect self._wrap_pool_connect(self.pool.connect, None), >> File "c:\Program >> Files\Anaconda2\lib\site-packages\sqlalchemy\engine\base.py",line 2147, in >> _wrap_pool_connect return fn() >> File "c:\Program Files\Anaconda2\lib\site-packages\sqlalchemy\pool.py", >> line 387, in connect return _ConnectionFairy._checkout(self) >> File "c:\Program Files\Anaconda2\lib\site-packages\sqlalchemy\pool.py", >> line 766, in _checkout fairy = _ConnectionRecord.checkout(pool) >> File "c:\Program Files\Anaconda2\lib\site-packages\sqlalchemy\pool.py", >> line 516, in checkout rec = pool._do_get() >> File "c:\Program Files\Anaconda2\lib\site-packages\sqlalchemy\pool.py", >> line 1138, in _do_get self._dec_overflow() >> File "c:\Program >> Files\Anaconda2\lib\site-packages\sqlalchemy\util\langhelpers.py", line 66, >> in __exit__ compat.reraise(exc_type, exc_value, exc_tb) >> File "c:\Program Files\Anaconda2\lib\site-packages\sqlalchemy\pool.py", >> line 1135, in _do_get return self._create_connection() >> File "c:\Program Files\Anaconda2\lib\site-packages\sqlalchemy\pool.py", >> line 333, in _create_connection return _ConnectionRecord(self) >> File "c:\Program Files\Anaconda2\lib\site-packages\sqlalchemy\pool.py", >> line 461, in __init__ self.__connect(first_connect_check=True) >> File "c:\Program Files\Anaconda2\lib\site-packages\sqlalchemy\pool.py", >> line 661, in __connect exec_once(self.connection, self) >> File "c:\Program >> Files\Anaconda2\lib\site-packages\sqlalchemy\event\attr.py",line 246, in >> exec_once self(*args, **kw) >> File "c:\Program >> Files\Anaconda2\lib\site-packages\sqlalchemy\event\attr.py",line 256, in >> __call__ fn(*args, **kw) >> File "c:\Program >> Files\Anaconda2\lib\site-packages\sqlalchemy\util\langhelpers.py", line >> 1331, in go return once_fn(*arg, **kw) >> File "c:\Program >> Files\Anaconda2\lib\site-packages\sqlalchemy\engine\strategies.py", line >> 181, in first_connect dialect.initialize(c) >> File "c:\Program >> Files\Anaconda2\lib\site-packages\sqlalchemy\connectors\pyodb c.py", line >> 165, in initialize super(PyODBCConnector, self).initialize(connection) >> File "c:\Program >> Files\Anaconda2\lib\site-packages\sqlalchemy\dialects\mssql\base.py", line >> 1742, in initialize super(MSDialect, self).initialize(connection) >> File "c:\Program >> Files\Anaconda2\lib\site-packages\sqlalchemy\engine\default.py", line 250, >> in initialize self._get_default_schema_name(connection) >> File "c:\Program >> Files\Anaconda2\lib\site-packages\sqlalchemy\dialects\mssql\base.py", line >> 1773, in _get_default_schema_name default_schema_name = >> connection.scalar(query) >> File "c:\Program >> Files\Anaconda2\lib\site-packages\sqlalchemy\engine\base.py",line 877, in >> scalar return self.execute(object, *multiparams, **params).scalar() >> File "c:\Program >> Files\Anaconda2\lib\site-packages\sqlalchemy\engine\result.py", line 1223, >> in scalar return row[0] >> File "c:\Program >> Files\Anaconda2\lib\site-packages\sqlalchemy\engine\result.py", line 563, in >> _key_fallback expression._string_or_unprintable(key)) >> sqlalchemy.exc.NoSuchColumnError: "Could not locate column in row for >> column '0'" > > > ODBC Driver Versions: >> >> SQL Server (SQLSRV32.DLL) = 6.00.6002.18005 >> SQL Server Native Client 10.0 (SQLNCLI10.DLL) = 2007.100.2531.00 > > > SQL Server Version >> >> SQL Server 2008 >> Microsoft SQL Server Management Studio = 10.0.6000.29 >> Microsoft Analysis Services Client Tools = 10.0.6000.29 >> Microsoft Data Access Components (MDAC) = 6.0.6002.18005 >> Microsoft MSXML = 3.0 6.0 >> Microsoft Internet Explorer = 9.0.8112.16421 >> Microsoft .NET Framework = 2.0.50727.4253 >> Operating System = 6.0.6002 > > > Server OS >> >> Windows Server 2008 Enterprise >> Service Pack 2 Installed > > > On Monday, July 3, 2017 at 8:33:54 PM UTC-5, Mike Bayer wrote: >> >> Can you send complete stack trace please? That's the main thing that will >> show which query this is occurring on (there are several upon connect). >> Also full detail on SQL server version, odbc driver, client operating >> system. >> >> On Jul 3, 2017 7:26 PM, "Paul Morel" <paul....@tartansolutions.com> wrote: >> >> Hi, >> >> I have been trying to diagnose this issue in a Windows Python 2.7 >> (Anaconda installed) environment running SQLAlchemy=1.1.11, pyodbc=4.0.17, >> and pymssql=2.1.3. >> >> Both pyodbc and pymssql connections will successfully connect and query a >> table correctly. However, when I attempt the same connection and query >> through SQLAlchemy either using an ORM or direct SQL, it fails with the >> following error: >> >>> sqlalchemy.exc.NoSuchColumnError: "Could not locate column in row for >>> column '0' >> >> >> The connection string I'm using is the following: >> >> >> 'mssql+pyodbc://:@CMPDSQL01:1433/CMP?driver=SQL+Server+Native+Client+10.0' >> >> >> The connection and simple query through pyodbc uses the following: >> >> print "---- Testing pyodbc Directly" >> cnxn = pyodbc.connect( >> r'Trusted_Connection=yes;' >> r'DRIVER={SQL Server Native Client 10.0};' >> r'SERVER=CMPDSQL01;' >> r'DATABASE=CMP;' >> ) >> >> print cnxn >> print "---- Complete ----" >> >> print "---- Running Direct SQL Query on pyodbc Direct Connection" >> cursor = cnxn.cursor() >> cursor.execute('SELECT * FROM EPO_MODELS') >> for r in cursor: >> print r >> print "---- Complete ----" >> >> >> The connection and simple query through pymssql uses the following: >> >> print "---- Testing pymssql Directly" >> cnxn = pymssql.connect(server='CMPDSQL01', port='1433', >> database='CMP') >> print cnxn >> print "---- Complete ----" >> >> print "---- Running Direct SQL Query on pymssql Direct Connection" >> cursor = cnxn.cursor() >> cursor.execute('SELECT * FROM EPO_MODELS') >> for r in cursor: >> print r >> print "---- Complete ----" >> >> >> What is even more perplexing is that the SQLAlchemy connection used to >> work but now no longer works. Unfortunately I don't know what broke it due >> to a clean start install. >> >> I don't think the EPO_MODELS object model comes into play with this error >> because even a direct SQL query fails in the same way. However, for >> completeness the EPO_MODELS object model is very simple and looks like the >> following: >> >> class EPO_MODELS(Base): >> __tablename__ = 'EPO_MODELS' >> >> ID = Column(Integer, primary_key=True, autoincrement=False) >> MODELTYPE = Column(Integer, autoincrement=False) >> MODELNAME = Column(NVARCHAR(255)) >> MEMO = Column(NVARCHAR(2000)) >> NEXTUNIQUEID = Column(Integer, autoincrement=False) >> MODELSYNC = Column(Integer, autoincrement=False) >> MODELSTATUS = Column(Integer, autoincrement=False) >> AUDITUSERID = Column(Integer, autoincrement=False) >> DATEALTERED = Column(DateTime) >> CREATIONDATE = Column(DateTime) >> >> >> The direct SQLAlchemy query looks like the following after getting the >> session using the connection string above: >> >> print "---- Running Direct SQL Query Through SQLAlchemy Connection" >> result = con.execute('SELECT * FROM EPO_MODELS') >> for r in result: >> print r >> print "---- Complete ----" >> >> Very much appreciate any insight into what is going on here. I can't seem >> to find the disconnect. Thanks in advance. >> >> Stack Overflow Post is here: https://stackoverflow.com/q/44893049/227542 >> >> -Paul >> >> -- >> SQLAlchemy - >> The Python SQL Toolkit and Object Relational Mapper >> >> http://www.sqlalchemy.org/ >> >> To post example code, please provide an MCVE: Minimal, Complete, and >> Verifiable Example. See http://stackoverflow.com/help/mcve for a full >> description. >> --- >> You received this message because you are subscribed to the Google Groups >> "sqlalchemy" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to sqlalchemy+...@googlegroups.com. >> To post to this group, send email to sqlal...@googlegroups.com. >> Visit this group at https://groups.google.com/group/sqlalchemy. >> For more options, visit https://groups.google.com/d/optout. >> >> > -- > SQLAlchemy - > The Python SQL Toolkit and Object Relational Mapper > > http://www.sqlalchemy.org/ > > To post example code, please provide an MCVE: Minimal, Complete, and > Verifiable Example. See http://stackoverflow.com/help/mcve for a full > description. > --- > You received this message because you are subscribed to the Google Groups > "sqlalchemy" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to sqlalchemy+unsubscr...@googlegroups.com. > To post to this group, send email to sqlalchemy@googlegroups.com. > Visit this group at https://groups.google.com/group/sqlalchemy. > For more options, visit https://groups.google.com/d/optout. -- SQLAlchemy - The Python SQL Toolkit and Object Relational Mapper http://www.sqlalchemy.org/ To post example code, please provide an MCVE: Minimal, Complete, and Verifiable Example. See http://stackoverflow.com/help/mcve for a full description. --- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com. 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