Daylight savings time? Oracle has ignore?

it has some command DBA that the Oracle 9i can ignore the Daylight savings time in the calculations with dates?
thanks.

I have following procedure:
procedure CREATE_STOCK_DATA_SCENA () is
next_day date;
n_days number;
begin
create table TEMP_GRAF_ESTOQ
DATA DATE not null,
-- continue
delete from temp_graf_estoq;
-- it generates 100 days from today on
next_day := sysdate;
n_days := 0;
while (n_days < 100)
loop
insert into temp_graf_estoq
(data)
values
(next_day);
next_day := next_day + numtodsinterval(1,
'DAY');
n_days := n_days + 1;
end loop;
/*** continue ****/
end CREATE_STOCK_DATA_SCENA;
In the output, when it was to generate the last day of the October month as 31, it is generated 30. I believe that it is for cause Daylight savings time.
Somebody already passed for this problem or something seemed?
Thanks

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2007 Daylight savings time - Oracle 9.2

Hi All,
My Oracle database runs on Windows 2000 Advanced Server. I have followed Microsoft instructions to update the Daylight Savings Time to new settings. Given this, will I need to apply Oracle patches ?
Thanks for your help,
P.

You will need to patch Oracle, check this blog for more info.
http://blogs.oracle.com/otn/stories/storyReader$367

Has anyone had problems in v5.0a of Iplanet calendar installed on a Sun box with creating events and daylight savings time?

Events created around 4/6/2002 at 8pm get created with the wrong time (9pm) and there are several other creation and display problems tied to Daylight Savings in April and October. Version 5.1 of the software seems to fix that but we are looking for a fix until we can upgrade. We have been using Windows systems to access the calendar.
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We have not seen exactly this, but many users appointments are lining up in the wrong time slots. Also, when scheduling, the time display is off by an hour. We have found what looks like a temporary fix.
We noticed that the problem only affects users who have the start of the week set to Sunday (when daylight savings time started). Setting the week to start on Monday fixed our display problems (you can do it in the users, options section).
I am placing a support call w/SUN.

Daylight Savings time, and how dates are stored internally and displayed

This is probably a question that appears here annually, but I couldn't really find clear answers, so I'll try asking this in my own words:
I'm in the Eastern timezone, and this Sunday, we'll be turning our clocks back an hour at 2:00 AM. That means that accordign to us humans, the time 1:30 AM will occur twice on Sunday.
I've got an Oracle application that runs every 5 minutes around the clock, and it selects records from a certain table whose updated timestamp (TIMESTAMP(6)) is greater than SYSDATE - 5/1440, meaning any record that was updated in the last 5 minutes. Will we have a problem with some records being processed twice on Sunday morning? I'm theorizing that everything will be OK, that internally, Oracle stores DATE fields using something like an epoch which then gets interpreted when we display them. An epoch value will continue to grow each second no matter what “time” it is according to the U.S. Congress.
A simpler way to look at the question might be as follows:
If you store SYSDATE in a DATE column in row “X” at 1:30 AM before the time change, and you store sysdate in row “Y” exactly one hour later, will Oracle say that X’s timestamp is 60 minutes less than Y’s timestamp? All fields that are related to my particular situation are either DATE or TIMESTAMP(6).
We use 11g.

>
That settles that! Thank you! My theory was wrong! I appreciate the help.
>
You may think it settles that but, sorry to burst your bubble, that doesn't really settle much of anything.
One thing that was settled is the answer to this question
>
But are they talking about what you can EXTRACT and DISPLAY from the field or what is actually STORED internally?
>
which is, as Mark stated, they are talking about what is stored internally.
The other thing that was settled is that you will pull the same, or mostly the same, data twice during that one hour. I say 'mostly the same' because of the major flaw your extraction method has to begin with.
>
If you store SYSDATE in a DATE column in row “X” at 1:30 AM before the time change, and you store sysdate in row “Y” exactly one hour later, will Oracle say that X’s timestamp is 60 minutes less than Y’s timestamp?
>
No - they will have the same time since 'one hour later' would have been 2:30 AM but the clock was turned back an hour so is again 1:30 AM. So the second time your job runs for 5 minutes at 1:30 AM it will pull both the original 1:30 AM data AND the data inserted an hour later.
And Oracle will say that data stored in row "Z" exactly 45 minutes later than "X" at 1:30 AM will have a date of 1:15 AM and will appear to have been stored earlier.
Your method of extracting data is seriously flawed to begin with so the daylight savings time issue is the least of your problems. The reason is related to the answer to this question you asked
>
do people avoid using DATE and TIMESTAMP datatypes because they are too simple?
>
That method isn't reliable - that is why people avoid using a date/timestamp value for pulling data. And the more often you pull data the worse the problems will be.
>
I've got an Oracle application that runs every 5 minutes around the clock, and it selects records from a certain table whose updated timestamp (TIMESTAMP(6)) is greater than SYSDATE - 5/1440, meaning any record that was updated in the last 5 minutes
>
No - it doesn't do that at all, at least not reliably. And THAT is the why your method is seriously flawed.
The reason is that the value that you use for that DATE or TIMESTAMP column (e.g. SYSDATE) is assigned BEFORE the transaction is committed. But your code that extracts the data is only pulling data for values that HAVE BEEN committed.
1. A transaction begins at 11:59 AM and performs an INSERT of one (or any number) of records. The value of SYSDATE used is 11:59 AM.
2. The transaction is COMMITTED at 12:03 AM.
3. Your job, which runs every five minutes pulls data for the period 11:55:00 AM to 11:59:59 AM. This job will NOT see the records inserted in step #1 because they had not been committed when your job query began execution - read consistency
4. Your job next pulls data for the period 12:00:00 AM to 12:04:59 AM. This job will also NOT see the records inserted in step #1 because the SYSDATE value used was 11:59 AM which is BEFORE this jobs time range.
You have one or ANY NUMBER of records that ARE NEVER PULLED!
That is why people don't (or shouldn't) use DATE/TIMESTAMP values for pulling data. If you only pull data once per day (e.g. after midnight to get 'yesterdays' data) then the only data you will miss is for data where the transaction began before midnight but the commit happened after midnight. Some environments have no, or very little, activity at that time of night and so may never have a 'missing data' problem.
Creating your tables with ROW DEPENDENCIES will store an SCN at the row level (at a cost of about 6 bytes per row) and you can use the commit SCN to pull data.
Just another caveat though - either of those approaches will still NEVER detect rows that have been deleted. So if you need those you need yet a different approach such as using a materialized view log that captures ALL changes.

COREid lockups at daylight savings time

Has anyone else run into COREid Access and Identity server lockups at the time when the daylight savings time adjustment occurs? It seems like it happens in the spring, but not in the fall. With the fall adjustment coming up soon, I guess we can validate that theory. According to Oracle support, we are the only customer who has reported the issue, but I have heard from friends that we are not the only customer experiencing it. Please let me know if you have run into this or not so that we can share notes and maybe get to the bottom of this issue.
Thanks!
Aaron

Ram,
That's a good thought. We do have some WebSphere connectors in both Eastern and Pacific (the main installation is in Central), but I know that we had this issue long before they were deployed. I don't think that putting the servers into the same time zone is an option due to the other dependancies.
Just to add a little more background to the mystery, this issue does not seem to be version specific as it has been with us through a couple of upgrades. I dont remember if we encountered it on 6.5, but we have definitly had it on all versions of 7.x that we have had installed.
If the time was out of synch, wouldn't that just cause the WebGates and connectors to stop functioning? That would be the logical result to me...
I will certainly keep this in mind when I review the logs from the next daylight savings time cut-over.
--Aaron

IdM Scheduler and Time Change to Daylight Savings Time GMT to BST

This isn't really a 'question' , but just a topic for discussion.
We're not live yet, but will be by the time the clocks go back. So I'm just interest to hear everyone's experiences and any issues with regards to the switching to / from DST
I did some "interesting" (or not) tests last night to see what happens with Pending Values which are due to take effect at the time change threshold of 01:00 GMT when switching to Daylight Savings Time (BST) GMT +0100.
It seems as if the IdM scheduler keeps going according to UTC or GMT. However any values provisioned to target systems or to local tables using the ddm.datetime8601 system variable are in local time according to the runtime server or SQL server's locale settings.
I set up a task to output from a javascript the current system date
using the following in the functions.
currentTime = new Date();
return currentTime.toString(); // returns Locale Time String
currentTime = new Date();
return currentTime.toUTCString(); // returns UTC Time String
in the same pass I also output the ddm.datetime8601 system parameter and the ddm.time24 system parameter.
This task was to update a comment on an entry and Scheduled to run at 00:00:00 and was executed at 00:00:06 GMT all times were still in GMT as expected.
Local Time: Sun Mar 27 00:00:06 GMT-0000 (GMT) 2011, UTC Time: Sun, 27 Mar 2011 00:00:06 GMT, ddm.datetime8601: 2011-03-27T00:00:06, ddm.time24: 00:00:06
This task was scheduled at 01:00:00 in IdM and was exectued at 01:00:08 GMT by the runtime, and you can see the local time is being correctly reported as 02:00:08 BST. Note also the ddmdatetime8061 is also 02:00:08 i.e. BST.
Local Time: Sun Mar 27 02:00:08 GMT+0100 (BST) 2011, UTC Time: Sun, 27 Mar 2011 01:00:08 GMT, ddm.datetime8601: 2011-03-27T02:00:08, ddm.time24: 02:00:08
In the database the entry values MXI_VALUES ModifyTime field has the GMT / UTC timestamp.
I also set up some pending value objects to be applied at 00:59:59 and 01:30:00 to see if the 01:30:00 would be 'skipped' as the locl clock change would've gone from 00:59:59 to 02:00:00. Well the pending values were correctly applied and expired and no 'lost' transactions happened as a result of the change.
So essentially it seems to me that the IdM runtime and scheduler times are all based on UTC / GMT.
I guess it's only an issue twice a year if you're expecting something to happen at a specific local time 01:00:00 or if you've got a global user base and their account expiry should be in each user's own country's local time. In these cases, it would seem that you'd need to convert the schedule times and pending value times to UTC first before setting them in the database.
Has anyone else had any issues, thoughts, questions or suggestioins on scheduling tasks which span the DST time change when switching to and from Daylight Savings Time.
Edited by: Paul Abrahamson on Mar 27, 2011 10:51 AM

Read here:
http://www.appleinsider.com/articles/10/10/11/applesays_ios_software_update_to_fix_pesky_alarm_clockbug.html

Daylight Savings Time and Alarmsk

Since the daylight savings time updated over the weekend the alarms I had programmed on my iPhone will not set properly. The phone displays the correct current time so I know the clock has updated but any alarms I have set for the hour of 2am - 3am don't display the proper time. They keep reverting to 1-2am. I have deleted them and recreated them with the same results, on 2 different iPhones, a 4gig and an 8gig.

I see im not the only one that gets up early. v1.1.3 and updated to 1.1.4 I am unable to set the alarm to any time in 2AM (2:01, 3, 4, 5, etc..) any time set to 2AM shows 1AM in the alarm. 2PM shows fine. Any hour of the day shows fine. The error is setting a time of 2AM as it will not show that time and will revert to 1AM.
I am in a zone that uses DST.
I guess apple doesnt want us to wake up to pay the bills.
I hope someone has a fix for this before I goto bed... busting out the old alarm clock now.

Daylight Savings Time and Time Zone Issue:

Howdy! Many of us woke up this morning to be dismayed to find that our iPhone was TWO hours behind instead of falling back one for the Daylight Savings Time adjustment, and were late for church. I have an iPhone 4S, with iOS 5...
I was working at that time of morning, and the initial switch went well. However, when I woke up, the clock was yet another hour behind. A little investigation showed that the Time zone had been changed to Denver (It was previously on Chicaco, and I live in Dallas.) I tried to select it to change it, and it wouldn't allow me. If I turned off the Set Automatically feature, then I could change it, but when I turned the Set Automatically feature back on, it would re-set the time zone to Denver.
I found another thread where they discuss this:
https://discussions.apple.com/message/16644669
To fix this, put in airplane mode, then back out again, then re-choose your correct time zone. If this doesn't work, then try turning your phone completely off and then on again. Thanks to 4n6doc for the tip!
The airplane mode trick worked for me: I turned airplane mode on, then off, then went to the Date & Time and set my time zone to Dallas, TX while the Set Automatically was off. When I turned the Set Automatically back on, it changed Dallas to Chicago, which is what every iPhone iOS I've ever had has done.

Hi,
Yes this is a correct way to fix the issue. One thing however, how did you set the timezone? For correct daylight saving handling, you'll have to use the long version, like America/New Yorw, NOT GMT-5 (for example).
regards,
~ Simon

2007 Daylight Savings Time Changes

What, if any, effects will the 2007 changes to US daylight savings time have on the operation of the LabVIEW 7 Express development environment and deployed applications created with it?

I believe the answer depends on the OS the application runs under.
If MS has there act together and the machine in question has recieved updates, there should be no issue.
If you are running Unix (or a variation o such), a patch must be applied (at least that was the story my wife gave for working all night Saturday night).
I can not answer this Q for Mac or LV-RT running under Pharlap.
Ben
Message Edited by Ben on 02-27-2007 10:24 AM
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction

E-Load/e-ME and Daylight Savings Time Change

If you are using e-TEST suite versions 8.10 or older, please see the following knowledge base article on updating your JRE for e-Load and e-Manager Enterprise.
http://qazone.empirix.com/entry.jspa?externalID=201&categoryID=15
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Message was edited by: jfernandes

My problem is that now CFMX 6.1 thinks that it is 8 hours
later in the day
than it really is (it is stuck on GMT now) and I am unable to
get CFMX to
acknowledge the operating systems clock. :-(
"GregK" <[email protected]> wrote in message
news:eord35$5mq$[email protected]..
The technote for this issue:
http://www.adobe.com/cfusion/knowledgebase/index.cfm?id=d2ab4470
has
another
link to a technote which addresses null pointer exceptions
after upgrading
the
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http://www.adobe.com/cfusion/knowledgebase/index.cfm?id=kb400232
The hotfix
described in that technote gives a fix for CFLDAP and
CFSERVLET tags after
the
new JVM is installed.
The important thing to note is that Adobe feels that
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will indeed present a problem for ColdFusion applications.
Unfortunately,
the
problems are not explained in any detail. I can guess that
functions like
DateDiff( ) may calculate incorrect values when spanning the
changed weeks
of
daylight savings time. As others have suggested; however,
simply retrieving
the system time, i.e. Now( ) function may not be affected as
long as the
operating system clock is set correctly.
Hope that helps.

Energy Act of 2005 and Daylight Savings Time

We currently use Sun Studio compilers. We use the embedded tools.h RogueWave libraries. The Energy Act of 2005 changes the dates for Daylight Savings Time starting in 2007. Will there be any patches from Sun to handle this? We currently use RWZoneSimple which is extensible, but we were hoping for an update from Sun.
Thanks in advance. Sorry if this has been covered, I just couldn't find anything.
Further Reading:
http://en.wikipedia.org/wiki/Energy_Policy_Act_of_2005

The RW Tools.h++ library that comes with Sun Studio has been updated with the new DST rules. I don't think the patches have been released yet.
If you have a service contract with Sun, you can get a pre-release version of the patch via your support channel.
Otherwise, check the Sun Studio patch page from time to time
http://developers.sun.com/sunstudio/downloads/patches/index.jsp
Look for a C++ compiler patch that includes a fix for bug 6456479.
RW Tools.h++ does its own DST calculations. Other libraries rely on the Solaris functions in libc. Patches for Solaris are available now as follows:
S10 - 118833-24(sparc), 118855-19(x86)
(The fix is included in S10u2.)
S 9 - 112874-34(sparc), 114432-24(x86)
S 8 - 108993-62(sparc), 108994-62(x86)

CF MX and Daylight Savings Time Change

Next year 2007, the Daylight Saving day (chaning the clocks
for spring and fall) will be changing. The Spring date will be a
month earlier and the fall date a month later then it has been for
years.
How will the Cold Fusion Server for MX 7+ handle this? Will
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Thanks.

My problem is that now CFMX 6.1 thinks that it is 8 hours
later in the day
than it really is (it is stuck on GMT now) and I am unable to
get CFMX to
acknowledge the operating systems clock. :-(
"GregK" <[email protected]> wrote in message
news:eord35$5mq$[email protected]..
The technote for this issue:
http://www.adobe.com/cfusion/knowledgebase/index.cfm?id=d2ab4470
has
another
link to a technote which addresses null pointer exceptions
after upgrading
the
JVM on CFMX 6.1 systems:
http://www.adobe.com/cfusion/knowledgebase/index.cfm?id=kb400232
The hotfix
described in that technote gives a fix for CFLDAP and
CFSERVLET tags after
the
new JVM is installed.
The important thing to note is that Adobe feels that
daylight savings time
will indeed present a problem for ColdFusion applications.
Unfortunately,
the
problems are not explained in any detail. I can guess that
functions like
DateDiff( ) may calculate incorrect values when spanning the
changed weeks
of
daylight savings time. As others have suggested; however,
simply retrieving
the system time, i.e. Now( ) function may not be affected as
long as the
operating system clock is set correctly.
Hope that helps.

CF MX and Daylight Savings Time

Hi. We have ColdFusion MX Version 6,1,0,83762 installed on
our Windows 2003 server. Will we have any issues with the product
and the Daylight Savings Time coming up on March 11? Is there a
required patch for this change? Thank you.

This has been discussed at length in
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Hi,
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Were on version 2.2(2) of CUE software.
This is also in indiana where the laws changed recently so maybe that has something to do with this.
Any ideas?

Very likely due to the change in Indiana. A workaround would be to change the timezone to an EST zone that observes DST such as America/Louisville (Eastern Time - Kentucky - Louisville Area).
Hope this helps.
Brandon

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In 2007 when the US changes the start/end dates for daylight savings time, will Apple patch 10.4.x, 10.3.x etc?

Apple has already patched Mac OS X 10.4 for the changes; this is included in Mac OS X 10.45 and newer.
(17177)

Daylight savings time? Oracle has ignore?

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