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List:       zope-db
Subject:    Re: [Zope-DB] Floating point problem with Oracle
From:       "Matthew T. Kromer" <matt () zope ! com>
Date:       2002-10-29 15:28:31
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Coi Giovanni wrote:

>Hi,
>
>we have a table (MOV) in Oracle with a filed like
>
>PRIZE   NUMBER(13,3) with NULL
>
>values in this field are 1000.23, 1000.65, ecc. 
>  
>
[...]

>
>someone can tell us why the floating point v1 have no decimal values?
>The type is correct (float), the values into the table also (as you can see
>form v2 = v1  * 100).
>Where are my decimals?
>
>(You can see the same problem from Zope using ZSQLMethod)
>
>Platform:
>SuSE Linux 2.4.10
>Python 2.1.3
>DCOracle 2.1.2 (but the same with DCOracle 2.1.1)
>
>env variable about oracle or localization:
>ORACLE_SID=orcl
>ORACLE_BASE=/opt/oracle
>ORACLE_HOME=/opt/oracle/product/8.1.7
>ORA_NLS33=/opt/oracle/product/8.1.7/ocommon/nls/admin/data
>
>RC_LANG=it_IT
>NLS_LANG=ITALIAN_ITALY.WE8ISO8859P15
>  
>

To handle LONG numbers, DCOracle2 fetches all numbers from Oracle as 
strings, and then runs the C utility function sscanf() on them to 
convert to a float when it needs to.  Oracle is almost for sure 
returning your values as 1000,23 1000,65 not 1000.23, 1000.65, right? 
 The indication is of a mismatch between the C locale and the Oracle locale.

Unfortunately, I tried to set my Oracle language like yours, and my 
LC_ALL to it_IT, and sscanf() still mis-parsed my results.  The best 
information I have available to me is that it should do so.


-- 
Matt Kromer
Zope Corporation  http://www.zope.com/ 




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