Date Arithmetic Bug(s) with Oracle?

Post Author: Andrew Reedick
CA Forum: Data Connectivity and SQL
The following sql returns a value of 60 from run via sqlplus:
select to_date('14-Dec-2007')-to_date('15-Oct-2007') as foo from dual
However, when CR runs it, it returns a value of -304.
Needless to say, I would prefer that the value be the number of days between the two dates, which is 60. Anyone have any idea as to why CR is screwing up?
Great. Another discrepancy:
The following
select sysdate + (to_date('14-Dec-07')-to_date('15-Oct-07')) as foo from dual
returns a value of 25-JAN-08 using Oracle sqlplus, whereas CR returns 1/26/2007. Any idea why the two would return different date values when using the same sql?
Is there something wrong with CR's Oracle db driver?
(SYSDATE is 1/26/07)

Post Author: Andrew Reedick
CA Forum: Data Connectivity and SQL
Looks like CR's Oracle driver and sqlplus are using different defaults for the dates.
Explicitly specifying the date format seems to have fixed the problem. Ex:
(to_date('2007-12-14', 'yyyy-mm-dd')-to_date('2007-10-15', 'yyyy-mm-dd'))

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Starting in Oracle Database 10g, Oracle Data Pump is the supported export and import utility for Change Data Capture.
Re-Creating AutoLog Change Data Capture Objects After an Import Operation
http://docs.oracle.com/cd/B19306_01/server.102/b14223/cdc.htm#i1027532
After a Data Pump full database import operation completes for a database containing AutoLog Change Data Capture objects, the following steps must be performed to restore these objects:
a. The publisher must manually drop the database objects underlying AutoLog Change Data Capture objects.
b. The publisher must re-create the AutoLog change sources, change sets, and change tables using the appropriate DBMS_CDC_PUBLISH procedures.
c. Subscribers must re-create their subscriptions to the AutoLog change sets.

Capturing data of the previous time interval with Oracle Stream(HotLog)

I read from 10g Oracle manual that Oracle Steam can capture data within specified time interval with begin_data and end_data options.
For example :
BEGIN
DBMS_CDC_PUBLISH.CREATE_CHANGE_SET(
change_set_name => 'set_cns',
description => 'set_cns...',
change_source_name => 'HOTLOG_SOURCE',
stop_on_ddl => 'y',
begin_date => sysdate,
end_date => sysdate + 1);
END;
However if I set begin_date to previous time from now, Oracle doesn't caputre data anymore in this case.(HotLog method)
(I set begin_date => sysdate - 1/24
end_date => sysdate + 1/24.)
Does anybody know to capture the previous time interval with Oracle Stream?

Change C2 to:
cursor c2(passing_date IN date) IS
SELECT MONITOR_ID, SAMPLE_ID,
               COLL_TIME, DEW_POINT
    FROM ARCHIVE_DATA
    WHERE COLL_TIME < passing_date
    ORDER BY COLL_TIME desc;And rather than populating a table with the three records, you could just select the three records using: where COLL_TIME between Prev3_time and Prev1_time

How can i query oracle database data to xml file with c++?

I want query data to xml file directly in my c++ application .
I know the oracle XSU provide interferce for query data to xml
file directly.
But XSU for oracle8i does not support c++.
I do not know if XSU for oracle9i support c++.
can you tell me?
If i do not use XSU to finish my applicayion.
what interface that oracle provide can help me do my work?
thank you !

BTW why do you want to migrate oracle database data to db2 database? Any specific project requirement like Parallel run with Oracle database (e.g data replication)? Or any other issues - Cost? Manageability? Availability? Business requirements?
Do you need to do a day-to-day data transfer or it is for permanent migration?

Data truncation with oracle.toplink.internal.databaseaccess.OraclePlatform

Hello everyone
I use Toplink 10g(9.0.4.5) with Oracle Lite database. I use the oracle.toplink.internal.databaseaccess.OraclePlatform and everything seems to be fine, except that when I pass a String more than the length defined in the Database, data is getting truncated to the maximum possible length in the Database and no exception is thrown. If I run a SQL statement directly on the Oracle Lite database using msql "value too large for column" exception is thrown.
The question is it the default behviour of oracle.toplink.internal.databaseaccess.OraclePlatform to truncate the data for the large Strings? How can i change this behaviour to throw an exception?
Any information on this would be highly appreciated.
Thanks in advance..

Thanks for the reply.
But my tests are pointing towards ToplinkPlatform only. I use the oracle.lite.poljdbc.POLJDBCDriver with Oracle Database Lite, and when I do a simple test to insert a large String wiht plaing JDBC and POLJDBCDriver, i receive the following error.
[POL-2403] value too large for column
However if i did the same using Toplink and oracle.toplink.internal.databaseaccess.OraclePlatform, the SQL statement generated by Toplink does not throw any errors. When i query the database, i see that the data is truncated. I use the same oracle.lite.poljdbc.POLJDBCDriver with Toplink.
<session>
<name>testLite</name>
<project-class>com.entityobjects.mappings.testLite</project-class>
<session-type>
<server-session/>
</session-type>
<login>
<driver-class>oracle.lite.poljdbc.POLJDBCDriver</driver-class>
<connection-url>jdbc:polite:POLITE;DataDirectory=C:\;Database=testLite;</connection-url>
<platform-class>oracle.toplink.internal.databaseaccess.OraclePlatform</platform-class>
<user-name>test1</user-name>
<password>test1</password>
<should-bind-all-parameters>true</should-bind-all-parameters></login>
<enable-logging>true</enable-logging>
<logging-options/>
</session>
I do not want to add a check at the object setter level, as the same object model is used in different projects and published across.
Any more ideas why data is getting truncated?
Thanks in advance for any suggestions..

Difference between real Hijri Date with Oracle Hijri date

Dear ALL,
I will appreciate if any one please let me the solution for this problem. In my application I show the Date in Hijri using the NLS setting. but the issue that "i face a deference between the real hijri date with oracle hijri date"
Assume that the real hijri date on 18-SEP-2012 was 02/11/1433 in hijri but in oracle was 03/11/1433
when I execute the following query it shows me "1433/11/03", but the actual Hijri date is "1433/11/02"
select to_char(to_date('20120918','YYYYMMDD'),'YYYY/MM/DD', 'NLS_calendar='''||'ARABIC hijrah') FROM DUAL;
IFTIKHAR

Hi,
It works correctly for me, too:
SELECT TO_CHAR ( TO_DATE ('20120918', 'YYYYMMDD')
          , 'YYYY/MM/DD'
          , 'NLS_calendar=''ARABIC hijrah'''
          )      AS h_date
FROM    dual;Output:
H_DATE
1433/11/02                                                                      I tried it on Oracle versions
9.2.0.6.0
10.1.0.2.0
10.2.0.3.0
11.1.0.6.0
11.2.0.1.0
and got the same results every time. What version of Oracle are you using? What other software (front end, OS, ...)?
If it's consistently giving you the results for the day after the day wanted, then subtract 1 day before calling TO_CHAR. I know this is not a solution, just a work-around until you find and fix the real problem.

Tools required to install to work with Oracle Data warehouse

Could anyone please guide me...as I am quite new to Oracle...
till now I was working on Data warehousing using Microsoft tools i.e. (SSIS, SSRS, SSAS, SQL Server)
So Please tell me which are the tools required to install to work with Oracle Data warehouse
I came to know about OWB and OBIEE, but not sure what exactly these are ?

In order to create and develop a webcenter portal application, you only need to install JDeveloper and download the WeBCenter extensions. That's true.
But this install does not include the WebCenter services like dicussions, document services, analytics,... If you want to use these and integrate them in your portal, then you would need to install the suite as described on my blog.

Date Arithmetic Bug(s) with Oracle?

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