BAM! That was it. There must be some type of incompatibility between the c extensions and the Windows 2008 Server configuration. I pip uninstalled/installed and found the c extensions where rebuilt. After removing *cresultproxy.pyd* from the sqlalchemy site-packages directory the queries started working again.
Many thanks... On Tuesday, July 4, 2017 at 4:34:38 PM UTC-5, Mike Bayer wrote: > > 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....@tartansolutions.com <javascript:>> 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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