[Zope-DB] DCOracle2 1.3beta executemany() dco2.DatabaseError

Lee, Bryson blee at slac.stanford.edu
Tue Feb 22 16:54:21 EST 2005


The problem seems to be assocated with a one-line change in the executemany() method in DCOracle2.py...

Around line 1130, there is a call to the setStatic() method of a BindingArray object.  In the 1.95 version of DCOracle2, this line is uncommented, which seems to imply that the parameter binding is static for that version.

In the 1.99 and 1.103 (latest CVS) versions of DCOracle1.py, this line is commented out, indicating that a non-static binding is being used.  If I uncomment this line in the 1.103 version and re-run my insert task, I no longer get the exception, and thus executemany() appears to work OK for arbitrary-length lists.

It appears that this line was first commented out in 1.96.  The commit log message for 1.96 makes no reference to this change, only to some changes in code for handling DATE types.  Makes me wonder if this was a debug or platform-specific thing that inadvertently got committed to the repository.



-----Original Message-----
From: zope-db-bounces at zope.org [mailto:zope-db-bounces at zope.org] On Behalf Of Lee, Bryson
Sent: Tuesday, February 22, 2005 12:38 PM
To: Matthew T. Kromer
Cc: zope-db at zope.org
Subject: RE: [Zope-DB] DCOracle2 1.3beta executemany() dco2.DatabaseError

I've built from the latest CVS tarball (DCOracle2 1.103, dco2 1.137) and added the setPrefetch(0) call, but I still get the same exception.


-----Original Message-----
From: Matthew T. Kromer [mailto:matt at bane.mi.org]
Sent: Friday, February 11, 2005 10:17 AM
To: Lee, Bryson
Cc: zope-db at zope.org
Subject: Re: [Zope-DB] DCOracle2 1.3beta executemany() dco2.DatabaseError

Here's something to try - -turn off cursor prefetching with

Also, the latest cvs build of dco2.so is 1.137 or so, so you're running about 8 patches behind at your current code base.

On Feb 10, 2005, at 6:42 PM, Lee, Bryson wrote:

> With the following Python / DCOracle2 combination:
> Python sys.version =
> 2.3.3 (#1, Apr  7 2004, 09:31:28)
> [GCC 2.95.3 20010315 (release)]
> DCOracle2.version =
> 1.3 beta -- DCOracle2 1.99 (dco2: 1.129 -DORACLE8i -DUSEOBJECT -Dlinux
> I get an exception if I call the executemany() method on a cursor if 
> the input record list has more than 12 items:
> dco2.DatabaseError: (1400, 'ORA-01400: cannot insert NULL into
> If the list has 12 or fewer items, the call works perfectly well.
> Using the same code to process the same data-set under Python 2.2.2 
> and DCOracle2 1.2 / 1.95 / dco2 1.120, the executemany() call works 
> correctly regardless of the length of the input record list.
> Has anybody else seen this sort of behavior?
> I can supply a dco2.tracedump of the failed call, if that helps
> Regards,
> Bryson Lee
> _______________________________________________
> Zope-DB mailing list
> Zope-DB at zope.org
> http://mail.zope.org/mailman/listinfo/zope-db

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