Re: [cx-oracle-users] Named Parameters Issue - ORA-01460: unimplemented or unreasonable conversion
Brought to you by:
atuining
Menu
▾
▴
Re: [cx-oracle-users] Named Parameters Issue - ORA-01460: unimplemented or unreasonable conversion requested (Anurag Chourasia)
|
From: Anurag C. <anu...@gm...> - 2013-04-10 16:17:05
|
Hi Jani and Mark....I have some positive updates :-)
Following Mark Harrison's suggestion, I tried typecasting unicode to str
and the results were positive.
This one worked for example
T_cursor.execute("SELECT DISTINCT(TAG_STATUS) FROM TAG_HIST WHERE TAG_NBR =
> :TAG_NBR", {'TAG_NBR': str(TAG_NBR)})
Following Jani's suggestion, i added this just before my cx_Oracle import
and removed the str() typecast conversion
import os
> os.environ.update([('NLS_LANG', '.UTF8'),('ORA_NCHAR_LITERAL_REPLACE',
> 'TRUE'),])
T_cursor.execute("SELECT DISTINCT(TAG_STATUS) FROM TAG_HIST WHERE TAG_NBR =
> :TAG_NBR", {'TAG_NBR': TAG_NBR})
And it worked just fine
Then i changed it to
import os
> os.environ.update([('NLS_LANG', '.UTF8'),])
And it worked fine as well.
I will do more tests during the day.
Jani : Is the variable ORA_NCHAR_LITERAL_REPLACE absolutely necessary?
Also, I could not find out the current value of NLS_LANG. . . When i query
from sqlplus it is not set...And when i use os.environ to get the value, i
get key error.
SQL> HOST ECHO %NLS_LANG%
> %NLS_LANG%
Regards,
Anurag
On Wed, Apr 10, 2013 at 4:01 AM, Jani Tiainen <re...@gm...> wrote:
> Ok, I do following when working with cx_Oracle:
>
> import os
> os.environ.update([
> # Oracle takes client-side character set encoding from the
> environment.
> ('NLS_LANG', '.UTF8'),
> # This prevents unicode from getting mangled by getting encoded
> into the
> # potentially non-unicode database character set.
> ('ORA_NCHAR_LITERAL_REPLACE', 'TRUE'),
> ])
>
> import cx_Oracle
>
> Above guarantees that you really are in UTF8 mode. Second environment
> variable one is not necessity. And AFAIK there is no other way to set
> them (except before running app itself) due the fact that NLS_LANG is
> read by OCI libs from the environment.
>
>
> After doing that I'll do the following:
>
> db = cx_Oracle.Connection(runenv.USERNAME, runenv.PASSWORD,
> runenv.TNSENTRY)
> c = db.cursor()
> c.execute("ALTER SESSION SET NLS_DATE_FORMAT = 'YYYY-MM-DD
> HH24:MI:SS' "
> "NLS_TIMESTAMP_FORMAT = 'YYYY-MM-DD HH24:MI:SS.FF' "
> "NLS_TERRITORY = 'AMERICA'")
>
> Idea is to make sure that dateformats and decimal points are consistent.
> For example my locale likes to use comma as a decimal separator.
>
> Which means that python 10.2f must be '10,2' when inserting to db.
> Painful that is.
>
>
> 9.4.2013 12:57, Anurag Chourasia kirjoitti:
> > Hi Jani. The column type is varchar2
> >
> > Regards,
> > Anurag
> >
> > On 9 Apr 2013 01:14, "Jani Tiainen" <re...@gm...
> > <mailto:re...@gm...>> wrote:
> >
> > What is the type of the column in the table?
> >
> > There are few quirks I know of.
> >
> > 9.4.2013 1:35, Anurag Chourasia kirjoitti:
> > > Thanks. Will try that too and report back the findings.
> > >
> > > Regards,
> > > Anurag
> > >
> > > On Mon, Apr 8, 2013 at 6:00 PM, Mark Harrison <mh...@pi...
> > <mailto:mh...@pi...>
> > > <mailto:mh...@pi... <mailto:mh...@pi...>>> wrote:
> > >
> > > On 4/8/13 2:56 PM, Anurag Chourasia wrote:
> > > > Hi Tamas,
> > > >
> > > > Thanks for the response. Here is the result...
> > > >
> > > > TAG_NBR: u'2928982' <type 'unicode'>
> > > >
> > > > Please let me know if this gives any more ideas. I will
> > also try
> > > a explicit type conversion using str() to see if that makes a
> > > difference.
> > >
> > > If that doesn't work can you try using a non-unicode string
> > such as
> > >
> > > {'TAG_NBR': 'ABC'}
> > >
> > >
> > >
> > >
> >
> ------------------------------------------------------------------------------
> > > Minimize network downtime and maximize team effectiveness.
> > > Reduce network management and security costs.Learn how to hire
> > > the most talented Cisco Certified professionals. Visit the
> > > Employer Resources Portal
> > > http://www.cisco.com/web/learning/employer_resources/index.html
> > > _______________________________________________
> > > cx-oracle-users mailing list
> > > cx-...@li...
> > <mailto:cx-...@li...>
> > > <mailto:cx-...@li...
> > <mailto:cx-...@li...>>
> > > https://lists.sourceforge.net/lists/listinfo/cx-oracle-users
> > >
> > >
> > >
> > >
> > >
> >
> ------------------------------------------------------------------------------
> > > Minimize network downtime and maximize team effectiveness.
> > > Reduce network management and security costs.Learn how to hire
> > > the most talented Cisco Certified professionals. Visit the
> > > Employer Resources Portal
> > > http://www.cisco.com/web/learning/employer_resources/index.html
> > >
> > >
> > >
> > > _______________________________________________
> > > cx-oracle-users mailing list
> > > cx-...@li...
> > <mailto:cx-...@li...>
> > > https://lists.sourceforge.net/lists/listinfo/cx-oracle-users
> > >
> >
> >
> > --
> > Jani Tiainen
> >
> > - Well planned is half done and a half done has been sufficient
> > before...
> >
> >
> ------------------------------------------------------------------------------
> > Precog is a next-generation analytics platform capable of advanced
> > analytics on semi-structured data. The platform includes APIs for
> > building
> > apps and a phenomenal toolset for data science. Developers can use
> > our toolset for easy data analysis & visualization. Get a free
> account!
> > http://www2.precog.com/precogplatform/slashdotnewsletter
> > _______________________________________________
> > cx-oracle-users mailing list
> > cx-...@li...
> > <mailto:cx-...@li...>
> > https://lists.sourceforge.net/lists/listinfo/cx-oracle-users
> >
> >
> >
> >
> ------------------------------------------------------------------------------
> > Precog is a next-generation analytics platform capable of advanced
> > analytics on semi-structured data. The platform includes APIs for
> building
> > apps and a phenomenal toolset for data science. Developers can use
> > our toolset for easy data analysis & visualization. Get a free account!
> > http://www2.precog.com/precogplatform/slashdotnewsletter
> >
> >
> >
> > _______________________________________________
> > cx-oracle-users mailing list
> > cx-...@li...
> > https://lists.sourceforge.net/lists/listinfo/cx-oracle-users
> >
>
>
> --
> Jani Tiainen
>
> - Well planned is half done and a half done has been sufficient before...
>
>
> ------------------------------------------------------------------------------
> Precog is a next-generation analytics platform capable of advanced
> analytics on semi-structured data. The platform includes APIs for building
> apps and a phenomenal toolset for data science. Developers can use
> our toolset for easy data analysis & visualization. Get a free account!
> http://www2.precog.com/precogplatform/slashdotnewsletter
> _______________________________________________
> cx-oracle-users mailing list
> cx-...@li...
> https://lists.sourceforge.net/lists/listinfo/cx-oracle-users
>
|
