Setting Valid Time to a point in time

What's the recommended way to set the valid time to a point in time? There are cases where we want to execute a select against Valid Time enabled tables, asking for valid records at a point in time (rather than a span of time).
I can't call SetValidTime, passing in the same begin and end date, which complains about a validTill date not greater than the validFrom.
DBMS_WM.SetValidTime(TO_DATE('05-01-2005', 'MM-DD-YYYY'), TO_DATE('05-01-2005', 'MM-DD-YYYY'));
What's the best way to do this?

Hi,
You can use dbms_wm.SetValidTimeFilterON to specify the point in time that you are interested in.
SQL> exec dbms_wm.SetValidTimeFilterON(to_date('05-01-2005', 'MM-DD-YYYY')) ;
This date needs to be contained within your session's validtime range.
Regards,
Ben

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I am trying to set up my old apple time capsule as a wireless access point for my girlfriend. She is at college and the university does not permit routers, so I am trying to set the time capsule up so that is just takes the hardwired internet and allows wireless access to the internet so she can use her iPad and MacBook Air on the wireless instead of having to use a gigabit adapter to use the ethernet. The time capsule has the newest firmware and she is running mavericks which has the newest airport utility software. However I am not sure what settings to use to make this work. I am fairly intelligent when it comes to computers however I am not very skilled in networking. If anyone can help I would greatly appreciate it.
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How old is the Time Capsule? Running what firmware?
You have a problem.. If you cannot use the TC in router mode, then you are going to have to use it in bridge.. and it then depends on if the Uni system will hand out mulitple IP addresses. .which I doubt. In the end you might be stuck.. and it is not possible really with any system..
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Ask their IT people how to use a wireless only device like ipad, when they only provide ethernet. You might find there already is a wireless internet system as well.

Setting up Time Machine to use an external drive attached to another mac

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Brian Curtiss wrote:
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that's normal.
The iMac external drive is listed as an attached drive if I click on the "brian.macbook" under the "Devices" heading of the finder window (along with the built-in drive, mobile me drive and 'network,).
This should be enough. normally, at this point the drive should appear as a possible TM drive choice. I don't know why it doesn't work for you.
You can try the following terminal command. It should not be needed but maybe it will help
defaults write com.apple.systempreferences TMShowUnsupportedNetworkVolumes 1
With the iMac's external drive's finder window (on the MacBook Pro) still open, clicking "Choose Backup Disk..." in the "Time Machine" system preferences window brings up an empty list. How do I get Time Machine to recognize the iMac's external drive as a valid choice?

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The next window prompts me to name the TC and assign a password. I do so and click continue.
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Thank you, Jim Somoygi. I had a similar multi-hour odyssey with a AE and a Comcast cable modem.
This solved the seemingly endless blinking amber light:
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5. Plug in the AE (or TC)
6. Green light on the AE (it's not easy being green)
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What part are you having problems with? You need to make sure File Sharing is enabled on the Time Capsule (which is done in AirPort Utility). Then you just connect to the Time Capsule either wirelessly or via ethernet cable and when you go to Time Machine setup your computer should recognize your Time Capsule as a valid storage for Time Machine backups.

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Hi,
I don't have Leopard here to try it with the wiki, but with Tiger I can publish a user calender to the iCal server after setting the time period in iCal client preferences. The times out of range are greyed out. When I subscribe with a different Tiger client those same periods remain greyed out.
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Another data point.
Harry

Setting up Time Capsule for backup only on existing wireless network

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3. Once i get it set up so it's visible as an external drive and usable for Time Machine backup, how do i then make it available to the other PCs on the network so they can back up to it also?
Thanks for your help.

sarah,
You already have an existing wireless network.
You do not need to plug the Time Capsule into anything except power.
Set the Time Capsule to "Join an existing wireless network"...
That is all you need to do.
Then all the computers should see the Time Capsule.
If you can't see "Join an existing wireless network" in the choices, hold down on the option key and then click on the choices.
Give that a try.

In base component when user change the serial number we need to set date time in Extra attribute filed

HI Team,
In ibase component when user change the serial number we need to set date time in Extra attribute filed..if we click edit ,User change serial number after save we need to set date time in Extra Attribute 4 field .
Component - PRDGENSET
In this component there is no attributes,so where we need to implement and how to implement please help.
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Hi Abi,
Thanks for your reply..see i debugged..i have put break point in method SET_S_STRUCT method if press enter in serial number ,debuggeris triggered..in SET_S_STRUCT method value getting serial number..so how to write the logic here...
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Setting up Time Machine with Snow Leopard and MyBook World Edition II NAS

I have just successfully set up Time Machine on my MyBook World Edition II NAS. It's not so straightforward, and the information on the Western Digital support site is either unhelpful or flat-out wrong, so here's a post that will hopefully save people in a similar position a lot of time and frustration.
Here are the key facts:
1. The MyBook World Edition II NAS does support Time Machine -- if you upgrade to at least firmware Release 1.01.14 (9/29/09). See http://www.wdc.com/wdproducts/updates/?family=mbworld. Amazingly, the Level I support people at Western Digital told me that Time Machine is not supported! I had to point him to this link.
2. MyBook World Edition II comes with a built-in user, WD_Backup, which appears to be the only user that can be used for the backup.
3. Follow the instructions here: http://www.wdc.com/wdproducts/updates/docs/en/appletimemachine.pdf. BUT, what the instructions don't tell you is the password for that user, which Mac OS will ask you for during the Time Machine setup. On my device, it was "admin" but other posts say the password can be "backup" or "wd_backup."
4. Ignore some of the misleading statements in the Western Digital "knowledge base." For example, it says Time Machine is not supported. That used to be true but with the firmware update, is no longer true. Also, some instructions direct you to make a partition on your drive for Time Machine using Disk Utility. This is not possible, as far as I can tell, because the MyBook World Edition II shows up as a "share," not a "device" in the system, and therefore Disk Utility does not see it.
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I hope that the Western Digital people will create greater flexibility for Time Machine users in future firmware updates.
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You do need to know that Apple may not support this: Here's the official word: http://support.apple.com/kb/HT1733 (Leopard) or http://docs.info.apple.com/article.html?path=Mac/10.6/en/15139.html (Snow Leopard).
You may be able to get it to work successfully, but there's no guarantee it will work well, or in the future.
From a post in another forum (found by V.K.):
The technical reason why Apple limits Time Machine to 10.5 AFP volumes appears to be to prevent disk image corruption. There were additional features added to AFP in 10.5 to support Time Machine. These presumably allow the disk image engine to force disk image journal data to write out all the way to the disk. Without such features, a network interruption can result in a corrupted filesystem on the disk image despite journaling. Remember, journaling relies on the journal being written all the way to disk before the changes take place. If you can't guarantee that (e.g., because of network/NAS buffering) then the journal is useless. Time Machine appears to rely heavily on disk journaling to deal with network drop-outs, interrupted backups, and the like. Take this away and your data is at risk.
If the NAS you are using supports these features it should report them to the OS and you should natively be able to choose that volume. If you have to trick the OS to use the volume it means the NAS does not support it.
To summarize: if you care about your backup data you should avoid using non-natively supported AFP servers.
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As long as you understand the risks, it's your call. But do yourself a favor and maintain some sort of secondary backup, such as a "clone" via CarbonCopyCloner or SuperDuper, or some other backup app. (Many of us do that with any backup app: no app is perfect, and all hardware fails, sooner or later.)

How do i set the time frame of a waveform chart programmatically to be a 30 sec window or a 24 hour window

i'm using LV7.0 and what i need to do is to be able to set the time frame or range of a waveform chart programmatically before i start taking and plotting data. sometimes this window needs to be 30s wide and sometimes it needs to be 24 hrs wide. (in the first reference, i need the chart to fill up with 30s of historical data then the whole chart scrolls with each new data point). the data acquisition records data at a rate of once per second. i've tried to use the chart properties of XScale.offset, XScale.Range.Minimum and XScale.Range.Maximum but no matter what i do the time-stamp on the x-axis is always "00:00:00 PM" and "MM/DD/YYYY" even though values are seen being plotted on the right side of the chart as expected.
Attachments:
BX0265 ShelfLife DAQmx.vi ‏120 KB

Okay, there seems to be some confusion here -- the X axis values are of type double, but they can be represented in the HH:MMS MMD:YYYY format if you want in which case it interprets the floating point as the number of seconds since 6pm Dec 31, 1903.
You can programmatically set this value using the XScale.Minimum and XScale.Maximum properties, but note that if you wire a waveform to the chart after setting these values the t0 parameter will override what you set using the property node for XScale.Minimum. If instead you leave the t0 parameter empty you can use the XScale.Offset property and wire the same value in that you wire to XScale.Minimum. Changing the amount you add to XScale.Minmum to obtain what you wire into XScale.Maximum will determine the time window size.
Doug M
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National Instruments
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Buddy ,
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Edited by: robo robo on May 20, 2009 11:56 AM

Valid Time Support - filling in gaps between non-contiguous records

Is there an easy (or recommended) way to fill in gaps in records stored in a table with Valid Time Support?
Here's my scenario. Suppose there are two "valid time" records for Adams in the table, one that's valid from 1/1/2000 to 1/1/2001 and the other that is valid from 1/1/2002 to 1/1/2003. In other words, there's a one year gap between the two records. The user wants to make a single edit to Adams that covers a broader period of time, e.g. 1/1/1999 to 1/1/2005, which should include the gap between these two records (and the gaps before the first record, from 1/1999 to 1/2000, and the gap after the last record, from 1/2003 to 1/2005).
What's the best way to do this?
I've tried setting the session time using DBMS_WM.SetValidTime() from 1/1/1999 to 1/1/2005, and then updating the database. But the update only changes the updated column (e.g. salary) without altering the VM_VALID timestamps.
Initial values:
NAME      SALARY     WM_VALID
Adams     30000     (1/1/2000 12:00:00.000000 AM -04:00, 1/1/2001 12:00:00.000000 AM -04:00)
Adams     31000     (1/1/2002 12:00:00.000000 AM -04:00, 1/1/2003 12:00:00.000000 AM -04:00)
==========
DBMS_WM.SetValidTime(TO_DATE('01-01-1999', 'MM-DD-YYYY'), TO_DATE('01-01-2005', 'MM-DD-YYYY'));
UPDATE tester_timevalues SET salary = 45000 WHERE name = 'Adams';
==========
Updated values:
Adams     45000     (1/1/2000 12:00:00.000000 AM -04:00, 1/1/2001 12:00:00.000000 AM -04:00)
Adams     45000     (1/1/2002 12:00:00.000000 AM -04:00, 1/1/2003 12:00:00.000000 AM -04:00)
I know this is "works as designed". But is there a relatively painless way to fill in the gaps in the records?

Thanks, Ben. I will give that approach a try.
BTW, I have an even better example where detecting and filling "gaps" in the effective dated periods is necessary.
Suppose I have a link table (GroupMembership) with foreign key links to an Employee and a Group table. Say that there's currently a record in the GroupMembership table indicating that Bob was a member of the Steering Committee group from 1/2002 to 1/2004. The information now needs to be amended to indicate that Bob was really a member from 1/2000 to 1/2006. Even if the GroupMembership table has a column that allows us to UPDATE it, the UPDATE will only affect the 2002 to 2004 range, even though we've called SetValidTime() for the range of 2000 to 2006.
We'll have to cook up some SQL to handle this case. But this seems like a case where Oracle's Valid Time Support could make this make this type of scenario easier to handle.
As it works now, Valid Time Support will indicate that there is a record for the requested time period (2000 to 2006), but doesn't indicate that the record's valid time period is different than the requested time period (at least not without some additional work on the developer's part).
Just a thought...

Setting the time in CUE

Gurus,
I have a CUE module attached to a 2801 router, running CME. The time on the CME is correct, but the time-stamp the CUE leaves on messages is 45 minutes slow. How can I set the time? As far as I know, I have no NTP server to point the thing to, and the documentation seems to suggest that the clock cannot be set through the GUI or CLI.
I'm grateful for any advice.

You have to use NTP. You are out of choice.
On the CME router, configure it to peer with a public NTP server.
ntp server
ntp master 1
On the CUE, sync clock via NTP to the CME router's ip address.
HTH
Sankar
PS: please remember to rate posts!

Setting PC Time

Hey all,
I am new to LabView and I had a quick question. Is it possible to
set the time on a PC within the LabVIEW environment? I am going
to be receiving gps time stamps through the serial port and would like
to adjust the PC's time and date to the gps values. Let me know
if you guys have any suggestions or ideas.
Thanks,
Jared Lucey

Hi Nishant,
I believe so. There's a windows function to set and get the timezone info'. I am attaching a half-finished VI to get the time zone info'. Maybe you can use this as a starting point for the set function.
Good luck!
-Khalid
Message Edited by Khalid on 11-14-2006 05:33 PM
Attachments:
getSysTimeZone.vi ‏27 KB

Setting Valid Time to a point in time

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