it's the select schema_name() query that's failing and that cursor.description is fine.
did you build the SQLAlchemy C extensions on windows? or does your anaconda build somehow deliver sqlalchemy/cresultproxy.dll to your installation ? my last theory here is that you have C extensions set up and somehow they built such that PyLong_CheckExact(0) is returning false. if you have any .dll's (or whatever Windows uses for native Python extensions these days), try blowing those away for SQLAlchemy. On Tue, Jul 4, 2017 at 2:24 PM, Paul Morel <paul.mo...@tartansolutions.com> wrote: > Sorry, I gave you the cursor.description of the schema_name() query. This > is the output for the cursor.description for the SELECT * FROM EPO_MODELS > query: > > pymssql Cursor Description is: >> >> ((u'ID', 3, None, None, None, None, None), (u'MODELTYPE', 3, None, None, >> None, N >> one, None), (u'MODELNAME', 1, None, None, None, None, None), (u'MEMO', 1, >> None, >> None, None, None, None), (u'NEXTUNIQUEID', 3, None, None, None, None, >> None), (u' >> MODELSYNC', 3, None, None, None, None, None), (u'MODELSTATUS', 3, None, >> None, No >> ne, None, None), (u'AUDITUSERID', 3, None, None, None, None, None), >> (u'DATEALTER >> ED', 4, None, None, None, None, None), (u'CREATIONDATE', 4, None, None, >> None, No >> ne, None)) > > > > pyodbc Cursor Description is: >> >> ((u'ID', 3, None, None, None, None, None), (u'MODELTYPE', 3, None, None, >> None, N >> one, None), (u'MODELNAME', 1, None, None, None, None, None), (u'MEMO', 1, >> None, >> None, None, None, None), (u'NEXTUNIQUEID', 3, None, None, None, None, >> None), (u' >> MODELSYNC', 3, None, None, None, None, None), (u'MODELSTATUS', 3, None, >> None, No >> ne, None, None), (u'AUDITUSERID', 3, None, None, None, None, None), >> (u'DATEALTER >> ED', 4, None, None, None, None, None), (u'CREATIONDATE', 4, None, None, >> None, No >> ne, None)) > > > > On Tuesday, July 4, 2017 at 1:13:12 PM UTC-5, Mike Bayer wrote: >> >> in your direct examples can you show me the output of >> "cursor.description" as well once you execute the query? >> >> On Tue, Jul 4, 2017 at 11:17 AM, Paul Morel >> <paul....@tartansolutions.com> wrote: >> > I ran that select statement under both the pyodbc and pymssql direct >> > connections and it appears to have returned a legitimate row of data. >> > This >> > is the excerpt from the test output: >> > >> >> ---- Testing pymssql Directly >> >> <pymssql.Connection object at 0x0000000003F64D48> >> >> ---- Complete ---- >> >> ---- Testing Get Schema Name with pymssql >> >> (u'dbo',) >> >> ---- Complete ---- >> >> ---- Testing pyodbc Directly >> >> <pyodbc.Connection object at 0x0000000003F049D0> >> >> ---- Complete ---- >> >> ---- Testing Get Schema Name with pyodbc >> >> (u'dbo', ) >> >> ---- Complete ---- >> >> ---- Testing SQLAlchemy Connection using pymssql >> >> <sqlalchemy.orm.session.Session object at 0x000000000518BEF0> >> >> ---- Complete ---- >> > >> > >> > I switched over the SQLAlchemy connection string to use pymssql. It now >> > looks like this: >> > >> > 'mssql+pymssql://:@CMPDSQL01:1433/CMP' >> > >> > The same error is produced. I attempted to run the SELECT schema_name() >> > query through the SQLAlchemy connection to see what was coming back but >> > it >> > failed in the same way because it is attempting its internal >> > schema_name() >> > query first. >> > >> > This is indeed quite strange since both the pyodbc and pymssql direct >> > connections did return a legit row when asking for the schema name. >> > >> > On Tuesday, July 4, 2017 at 9:27:09 AM UTC-5, Mike Bayer wrote: >> >> >> >> 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....@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. 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