can you run this query please? SELECT schema_name()
the issue is, that query is returning a result, there is a row, but it no columns, which is nonsensical. Did you try running with the mssql+pymssql:// driver? Looks like a pyodbc bug so far but need more info. On Tue, Jul 4, 2017 at 9:59 AM, Simon King <si...@simonking.org.uk> wrote: > 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. > 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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