Question about Http?

hi,
can anyone explain me how a browser know the end of a requested ressource send by a server, if the
content-length http header wasn't included inside the response (http response i mean) ? is there a blank line at end or somethingelse ??
thanks for your help

Probably either an EOF gets sent from the server or the server closes the connection

Similar Messages

Questions about Http Listener

Hi,everybody:
I'm testing a project building on oas4.0 and solaris system.After I installed OAS,I did some setting about site.I create a new http listener,and then start,but failed.The error is:"Error: you must specify a root directory mapping before all other mappings.see (DirMaps).The Server could not initialize."
But I've set the root directory,what's the meaning of it,and how to improve it? If U know,pls tell me.
Thanks.

Hi Wei,
I could be wrong here, but as far as I know, OAS is a pretty old product
and -- if I remember correctly -- quite buggy. That's why Oracle replaced
it with 9iAS. I would imagine that OAS is probably de-supported now.
Perhaps you should consider upgrading to 9iAS (if possible)?
Good Luck,
Avi.

Question about HTTP Server and 9iAS

I am kind of new to Oracles 9is products. I installed Oracle 9i Rel. 2 recently and it installed HTTP Server and other stuff as part of that install. I am trying to write a small web application. Is this install good enough to do basic servlet's, jsp's and may be EJB's etc ... or do I need to install 9iAS. I am confused on the fact that I know 9iAS will give me j2ee container, web container, clustering, etc ..., what functionality is included in the 9i databases web server piece.
Also, can anyone point me to a good documentation that explains directory structure of 9i Rel. 2. I am familiar with the database part fairly well(oracle 7 release). However, I am confused as to new web related stuff (Apache, bc4j, etc..) in 9i Rel. 2.
Thanks.

Hi,
No, you cannot run EJB's in the Apache installation. For that you might want to download OC4J.
Basic Http pages and Servlets can run but I dont think it is advisable to use it for that. For any kind of development, I would suggest you to use OC4J.
Oracle9i Database is web enabled and you can access the table, etc.. from a browser too. This is the reason Apache is provided with the basic installation. Oracle9i Rel 2 has XML DB in it which again can be accessed from the Web.
For more help on any of these check http://otn.oracle.com/documentation/oracle9i.html
You will be able to get all the related Developer's Guide here.
Hope this helps,
Rajat

Questions about https and os version

Hi,
we are installing 2 s160
OS Version
same machine, same license feature, but after last os upgrade we have 2 different version v7.1.1-033 and v7.1.1-027
Why ?
https,
for the moment customer don't want enable https proxy, but user must access to https site.
Actually when tryng access https site doesn'work, because unable to match any access policy.
Have you some idea ?
Thanks in advance for help
Luca

Hello Luca,
There will be a version of 7.1.1, that will be made available to allow you to upgrade and have the same version for your WSA. There is some work that is being done on the 7.1.1 line code, that is why you can not upgrade further from where you are now.
With regards to the https, if you say you have not enabled https proxy, the proxy will not really do anything on the ports you did not configure it to proxy for.
http://tinyurl.com/q3bord
It may help to do packet captures on the client, and see what is happening to the traffic, and also check for access logs on the WSA, to see if the WSA has any logs for the clinet https traffic.
http://tinyurl.com/6ekeec
I hope this information helps you.
Regards,
Eric

Question about Http Transaction in Servlet

If I want to use the http connection to send some data to the servlet.
But not all the data are encoded in English (maybe some are in Chinese), then how can I set do it?
This is because when I use request.getParameter("some parameter name") and the value of this parameter is in Chinese. Then the string is not properly encoded.
Do I need to set the CharacterEncoding to support unicode?

First make sure that data you are sending over is encoded in UTF-8 by setting the encoding of the html form to utf-8.
Then is your servlet do that following
before getting any parameters form the request object call
request.setCharacterEncoding("UTF-8");
then get the request parameters as usual.
request.getParameter("parameter name");
That should do it. By the way this should work with any character encoding just make sure they are consistent between you html form and what you set in your servlet.

Question about https

I'm just over 6 months on the job and am new to the IronPort. Found that users can still get to facebook and other web sites by using https. Not sure if I need to enable the HTTPS proxy. I don't really care to monitor the SSL session. Our policy is just to limit access to certain web pages. Can anyone advise. We're using WCCP from an ASA firewall. Thanks.

To add on to what Eric is saying:
The decryption policies have a few different actions. To block facebook HTTPS traffic, there are a few different ways to do it, depending on your needs.
Add facebook.com and .facebook.com to a custom category
Or if you want to block all social networking sites, just modify the action for the "social networking" category.
In the decryption policies, here are your options for blocking:
Set the category to Drop. This means that the SSL connection will be abruptly terminated - NO BLOCK PAGE. Just a generic browser error will show up.
Set the category to Decrypt and then the access policies will apply. So if your access policies block facebook, facebook will be blocked.
One key thing to understand is that cookie surrogates won't provide auth credentials for HTTPS traffic, so if you're using cookie surrogates, your decryption policies will be for all users matching a "no auth" Identity. In short, this means that you can only "drop" HTTPS facebook traffic for EVERYONE, you can't pick and choose by user / group, unless you use IP surrogates.
This is due to technical limitations in how HTTPS proxies work with authentication.
Hope this helps.
Cheers,
Josh

Question about http proxies

Hi,
I know there is a possibility to specify an http proxy at start time with:
java -Dhttp.proxyHost=proxy.mycompany.com Dhttp.proxyPort=8080But is there a possibility to set an http proxy at run time? If yes, how?
Thanks,
J.

Certainly.
1. Locate the Javadoc for java.net.Proxy.
2. Read it.
3. Click the 'Use' button at the top to see where you can use it.
4. Find the use that corresponds most closely to your code.
5. Use it there in the manner indicated.
Works for me, every time ;-)

Problem about HTTPS

Dear guys,
I have a question about HTTPS. I try to run the midlet over HTTPS but I got an error something like they don't know this protocol. I think I heard that WTK104 supports HTTPS. So the problem might come from the midp1.0.3. I read the user guide it said like it is optional for midp1.0.3 to support HTTPS or I have to recompile this module specially. I really wonder whether we do have to do that or not. What's more is how to do that? In the user guide is not too clear. Any idea about this?
Thanks!!
Udsy

Hi john wen
Thanks a lot for your help. However, after I tried to use build to include HTTPs, I still get error following
$ make INCLUDE_HTTPS=TRUE
find: ./../../../kvm/api/src/java: No such file or directory
find: ./../../../kvm/api/src/javax: No such file or directory
find: ./../../../kvm/api/src/com/sun/cldc: No such file or directory
find: ./../../../kvm/api/src/java: No such file or directory
find: ./../../../kvm/api/src/javax: No such file or directory
find: ./../../../kvm/api/src/com/sun/cldc: No such file or directory
find: ./../../../kvm/tools/preverifier/src: No such file or directory
find: ./../../../kvm/tools/jcc/src: No such file or directory
find: ./../../../kvm/tools/preverifier/src: No such file or directory
make: link: Command not found
make: *** [bin/preverify.exe] Error 127
I don't know why. I read from cygwin that I have to use make instead of gnumake. I also already change directory to c:/j2me/midp1.0.3fcs/build/win32 and then started building. Do you have any idea about this?
thanks
udsy

Few questions about partitioning and formatting in Windows 8

Hello,
I'm very shortly after a Windows 8 reinstall and I want to make use of this moment to finally understand partitioning and formatting in Windows 8.
Before using Windows 8, I was an XP user for 5 years and I actually never bothered myself with formatting my main system partition, that's probably why my computer ended up working like a slime for the last years. Anyway, by now I have been using Windows 8 for a year.
Three weeks ago I faced a system-related problem with my laptop (IdeaPad Y580) which prevented it from peacefully shutting down. A good friend of mine (XP user for his entire life, and now Windows 7 newbie user) told me, that I should keep all my non-system stuff on separate partition and that I should do the main system partition format from time to time to keep my PC out of trouble. It is sure that he took his knowledge from using XP, and here's my first question - does this method apply to Windows 8?
I mean as far as I know, back then, in XP, partitioning was possible only during Windows installation, and now, in Windows 8 we have a Disk Management for this, which do not require running Windows installation to create new partitions.
I'm mentioning this due to the fact that originally (I mean by factory settings) my drive has only one visible partition - C: (1TB), so I would need to use the Disk Management to take some space from C: partition and allocate it to the new D: partition.
In case I do this whole partitioning operation and create a D: partition, is it sure that formatting my system-only C: partition won't have effects on my D: partition, and all the programms and data I have here will stay on their places and work after format? (I'm worried about this because I've seen in some partitioning guide a warning not to format the main partition after the partitioning operation, because it would erase totally all data - I'm not sure if I misunderstood something or is it a mistake? EDIT: here's the link for this guide, just jump to the "Final Thoughts" section to see what I'm taking about: http://www.technorms.com/8438/windows-8-create-hard-drive-partition ).
If this whole method of keeping your system running fine doesn't apply to Windows 8, I guess I'm okay with having only one C: partition.
By the way, it doesn't matter for me if I create new partition in terms of conflicts with preinstalled Lenovo OneKey Recovery, since I had to reinstall my Windows 8 recently from non-Lenovo CD, and either way my laptop is now totally clean, without Lenovo stuff (I found Lenovo Recovery CD for Y580 on the internet, but it had non-single-language Windows 8 in it, and I needed a single-laguage one in order to have my Product Key recognised, so I just used a pure Windows 8 SL installer)

I just found out that I can't even transfer my Users folder or Program Data to other drive than the one with the system, because it would prevent me from updating my system or even from actually booting to my system. So apparently my whole topic is for nothing... I guess I should live with only one drive, and whenever my system totally crashes again I should do the backups to my external HDD. It's sad though that Windows 8 is a total opposite to user-friendly OS, to say the least.

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Question about JAX-WS together with EJB 3.0 on WLS 10.3

Hi all,
I am developing a application that it is running on WebLogic 10.3. The application expose EJB 3.0 methods as web services by @WebService & @WebMethod annotation. And my question is,
1. Is there any way to specify the context path/root for those exposed EJB? Currently the contextpath is same as the EJB's name
2. And is there a method to disable the "scanning" of JAX-WS annotation on startup/deployment? The reason behind is that, some of the EJB jar files are coming from other team. I need to deploy it as EJB but not as a web service.
Thanks
Regards,
Rock

Hi guys,
Here is what Eduardo is talking about:
https://metalink.oracle.com/metalink/plsql/ml2_documents.showDocument?p_database_id=NOT&p_id=407022.1
(Doc ID: Note:407022.1)
Rgds,
Fábio.

Some questions about Muse

First of all, I would like to say that I am very impressed with how well Muse works and how easy it was to create a website that satisfies me. Before I started a daily updated website I thought I would encounter many problems I will not be able to solve. I have only had a few minor issues which I would like to share with you.
The most problems I have with a horizontal layouts (http://www.leftlane.pl/sty14/dig-t-r-3-cylindrowy-silnik-nissana-o-wadze-40-kg-i-mocy-400- km.html). Marking and copying of a text is possible only on the last (top) layer of a document. The same situation is with widgets or anything connected with rollover state - it does not work. In the above example it would be perfect to use a composition/tooltip widget on the first page. Unfortunately, you cannot even move the cursor into it.
It would be helpful to have an option of rolling a mouse to an anchor (like in here http://www.play.pl/super-smartfony/lg-nexus-5.html and here http://www.thepetedesign.com/demos/onepage_scroll_demo.html). I mean any action of a mouse wheel would make a move to another anchor/screen. It would make navigation of my site very easy.
Is it possible to create a widget with a function next anchor/previous anchor? Currently, in the menu every button must be connected to a different anchor for the menu to be functional.
A question about Adobe Muse. Is it possible to create panels in different columns? It would make it easier to go through all the sophisticated program functions.
The hits from Facebook have sometimes very long links, eg.
(http://www.leftlane.pl/sty14/mclaren-p1-nowy-krol-nurburgring.html?fb_action_ids=143235557 3667782&fb_action_types=og.likes&fb_source=aggregation&fb_aggregation_id=288381481237582). If such a link is activated, the anchors in the menu do not work on any page. I mean the backlight of an active state, which helps the user to find out where on page they currently are. The problem also occurs when in the name of a html file polish fonts exist. And sometimes the dots does not work without any reason, mostly in the main page, sometimes in the cooperation page either (http://www.leftlane.pl/wspolpraca/). In the first case (on main page), I do not know why. I have checked if they did not drop into a state button by accident, moved them among the layers, numbered them from scratch and it did not help. In the cooperation page, the first anchor does not work if it is in Y axle set at 0. If I move it right direction- everything is ok.
The text frame with background fill does not change text color in overlay state (http://www.leftlane.pl/sty14/nowe-mini-krolestwo-silnikow-3-cylindrowych.html). I mean a source button at the beginning of every text. I would like a dark text and a light layer in a rollover, but the text after export and moving cursor into it does not change color for some reason.
I was not sure whether to keep everything (whole website) in one Muse file (but I may be mistaken?). I have decided to divide it into months. Everyone is in a different Muse file. If something goes wrong, I will not have any trouble with an upload of a whole site, which is going to get bigger and bigger.
The problem is that every file has two master pages. Everything works well up to the moment when I realize how many times I have to make changes in upper menu when I need to add something there. I have already 5 files, every with 2 masters. Is there any way to solve this problem? Maybe something to do with Business Catalyst, where I could connect a menu to every subpage independently, deleting it from Muse file? Doing so I would be able to edit it everywhere from one place. It would make my work much easier, but I have no idea jendak how to do it.
The comments Disqus do not load, especially at horizontal layouts (http://www.leftlane.pl/sty14/2014-infiniti-q50-eau-rouge-concept.html). I have exchanged some mails and screenshots with Disqus help. I have sent them a screenshot where the comments are not loaded, because they almost never load. They have replied that it works at their place even with attached screenshot. I have a hard time to discuss it, because it does not work with me and with my friends either. Maybe you could fix it? I would not like to end up with awful facebook comments ;). The problem is with Firefox on PC and Mac. Chrome, Safari and Opera work ok.
YouTube movie level layouts do not work well with IE11 and Safari 7 (http://www.leftlane.pl/sty14/wypadki-drogowe--004.html). The background should roll left, but in the above mentioned browsers it jumps up. Moreover the scrolling with menu dots is not fluent on Firefox, but I guess it is due to Firefox issues? The same layout but in vertical version rolls fluently in Firefox (http://www.leftlane.pl/sty14/polskie-wypadki--005.html).
Now, viewing the website on new smartphones and tablets. I know it is not a mobile/tablet layout, but I tried to make it possible to be used on mobile hardware with HD (1280) display. I mean most of all horizontal layouts (http://www.leftlane.pl/sty14/2015-hyundai-genesis.html), where If we want to roll left, we need to roll down. Is there a way to make it possible to move the finger the direction in which the layout goes?
On Android phones (Nexus 4, Android 4.4.2, Chrome 32) the fade away background effect does not work, although I have spent a lot of time over it (http://www.leftlane.pl/lut14/koniec-produkcji-elektrycznego-renault-fluence-ze!.html). It is ok on PC, but on the phone it does not look good. A whole picture moves from a lower layer instead of an edge which spoils everything.
This layout does not look good on Android (http://www.leftlane.pl/sty14/nowe-mini-krolestwo-silnikow-3-cylindrowych.html#a07). The background does not fill the whole width of a page. There are also problems with a photo gallery, where full screen pictures should fill more of a screen.
Is it possible to make an option of scroll effects/motions for a fullscreen slideshow widget thumbnails (http://www.leftlane.pl/sty14/2014-chevrolet-ss%2c-rodzinny-sedan-z-415-konnym-v8.html#a06)? It would help me with designing layouts. Currently, it can go from a bottom of a page at x1 speed or emerge (like in this layout) by changing opacity. Something more will be needed, I suppose.
Sometimes the pictures from gallery (http://www.leftlane.pl/sty14/2014-chevrolet-ss%2c-rodzinny-sedan-z-415-konnym-v8.html#a06 download very slowly. The website is hosted at Business Catalyst. I cannot state when exactly it happens, most of the time it works ok.
I really like layouts like this (http://www.leftlane.pl/sty14/2014-chevrolet-ss%2c-rodzinny-sedan-z-415-konnym-v8.html#a03). On the top is a description and a main text, and the picture is a filled object with a hold set at the bottom edge. That is why there is a nice effect of a filling a whole screen- nevertheless the resolution that is set. It works perfect on PC, but on Android the picture goes beyond the screen. You can do something about it?
In horizontal layouts (http://www.leftlane.pl/sty14/dig-t-r-3-cylindrowy-silnik-nissana-o-wadze-40-kg-i-mocy-400- km.html) holding of a filling object does not work. Everything is always held to upper edge of a screen regardless the settings. Possibility of holding the picture to the bottom edge or center would make my work much easier.
According to UE regulations we have to inform about the cookies. I do not know how to do it in Muse. I mean, when the message shows up one time and is accepted, there would be no need to show it again and again during another visit on the website. Is there any way to do it? Is there any widget for it maybe?
The YouTube widget sometimes changes size just like that. It is so when the miniature of the movie does not load, and the widget is set to stroke (in our case 4 pixels, rounded to 1 pixel). As I remember ( in case of a load error) it extends for 8 pixels wide.
Last but not least - we use the cheapest hosting plan in Business Catalyst. The monthly bandwidth is enough, although we have a lot of pictures and we worried about it at first. Yet we are running out of the disk storage very quickly. We have used more than a half of a 1 GB after a month. We do not want to change BC for a different one, because we like the way it is connected with Muse. But we do not want to buy the most expensive package - but only this one has more disk space. We do not need any other of these functions and it would devastate our budget. Do we have any other option?
I’m using Adobe Muse 7.2 on OS X 10.9.1.
and I'm sending Muse file to <[email protected]>

Unfortunatley, there is no way to get a code view in Muse. I know quite a few people requested it in the previous forum, but not really sure where that ended up. Also, you may not want to bring the html into DW unless you only have 1 or 2 small changes 2 make. Two reasons. First, it isnt backwards compatible, so if you are planning on updating that site in Muse, you will need to make those changes in DW everytime you update. Second, by all accounts the HTML that Muse puts out is not pretty or easy to work with. Unlike you, I am code averse, but there was a lenghty discussion on the previous forum on this topic. I know they were striving to make it better with every release, just not sure where it is at this point.
Dont think I am reading that second question right, but there was a ton of info on that old site. You may want to take a look there, people posted a ton of great unique solutions, so it worth a look.
Here is the link to the old forums- http://support.muse.adobe.com/muse

Just installed iOS6, questions about "iMessage" and other things...

I've been a satisfied iOS4 user since I bought my iPhone4, but I was forced to install iOS6 tonight in order to download a "free" app. I found a few new icons on the screen along with about 200 percent more "Settings" I'd like to ask some questions about. I'm sure a few of these could be answered by doing a frantic and thorough search through weeks of posts but I'm a little short on time right now.
First, what exactly is iMessage? Looking at the page for it, I can't see any difference between it and regular text messages. The info page says its to avoid charges, but between my data plan and not being charged for text I don't see where theres any other benefit. The one person I text with the most recently asked me why I had not installed iMessage yet, and didn't have an answer when I asked him why I should. I guess he just wanted to see text replies in blue instead of green.
In a related bit, flipping through Settings>Messages>Send & Receive I find a "2 addresses" section, with my phone number in there as well as my email under "You can be reached by iMessage at:" and "Start new conversations from:". What good does it do iMessages to have my email address? Does the Mail app handle text as well as email addresses? That seems to be the only explanation, and also very odd to think I'd be trying to text through my Mail app.
Second, looking through the Settings>Mail I see now that I have an icloud email address as well as the mac.com address I've been desperately hanging on to for the past 10 years, and the me.com address they've been trying to force me into since those came out. (I was happy to see I could delete the me.com address from the phone. I wish I could delete it from the universe.)
I wasn't even aware there was a such thing as icloud.com addresses. When did this happen? What is it used for?
Third, under that icloud Setting I see a long list of apps with buttons labeled "Off" under it. What are those for? Under the Mac.com settings I see switches for "Mail" and "Notes", with Mail on and Notes off. The Notes app (which I haven't used since my old iPhone 3) still opens, regardless of this setting.
Fourth, I now have an item called "Facetime" under my Settings. It is off, but underneath it says "Your phone number and/or email address will be shared with people you call". I understand caller ID normally sends caller number info to the receiver, but why would someone need my email address if I call them?
Fifth, I now have a "Music" setting, at the bottom of which I see a "Home Sharing" item, which when clicked brings up my AppleID and asks me if I want to Sign Out or Cancel. What is Home Sharing? Its also at the bottom of the "Video" settings.
Sixth, now I have Twitter and Facebook settings? For what? I don't have accounts with either of those companies. So why have settings, especially since it asks me to create accounts and download apps for those companies right in the Settings?
Seventh, there is a camera icon on the unlock screen. Touching it causes the screen to bounce up about a quarter inch, almost but not quite revealing something behind it. I should probably just quit asking about this stuff already, but I'll take the bait - what is this now?
Finally, what is the Notification Center used for?
If I got a text under iOS4, it would put an alert on the Unlock screen. Scrolling through this huge list of things under the Notification settings I'm really blown away by all the apps set up to yell at me. I can see having an alert for a text message but Game Center? What the heck is that, and why is it set up to hit me with a "Badge App Icon" (whatever that is) when I get alerts from "Everyone". Similarly, the phone is set to alert me to something called a "Photostream Alert"? What is this? Why is there a Phone section for the Notification Center? So they can put a Notice on my screen to tell me the phone is ringing? Holy cow! The phone is set to send me alerts from the "Weather Widget". So if I miss the fact its raining there will be a message on my screen to let me know? Whats next - a buzzer to tell me I'm listening to music?
There's a lot more, like what would I need Passbook for when I have the actual movie tickets, gate boarding passes, coupons, etc in my hands, but we'll leave that for another time. Many thanks to all who can offer some answers to my questions above.

Hey Taantumus!
Here is an article that will provide some guidance on this question:
Apple ID: Changing your password
http://support.apple.com/kb/ht5624
The next time you use an Apple feature or service that uses Apple ID, you'll be asked to sign in with your new Apple ID password.
Thanks for coming to the Apple Support Communities!
Regards,
Braden

Questions about using Bitlocker without TPM

We currently use Bitlocker to encrypt our Windows 7 computers with TPM. Now we are looking at encrypting some Windows 7 computers without a TPM. I see how to change the group policy setting to allow Bitlocker without a TPM. I have looked at a lot of other
threads and I have a few questions about how the Bitlocker without TPM works.
1) I see a USB drive containing a key is required for Bitlocker configurations without a TPM, say the end user loses this USB drive, what are the recovery options for their computer?
This article seems to indicate that without the USB drive connected, you are unable to even access recovery options http://blogs.technet.com/b/hugofe/archive/2010/10/29/bitlocker-without-tpm.aspx
We have recovery backed up to AD when Bitlocker is enabled, but how could we do this recovery on a computer on computer where it's USB is lost? Would we have to remove the HD itself and attach it to another computer to access?
2) After enabling Bitlocker on a computer without a TPM and using the USB Drive for the key, is there a way to also add a PIN or password protection at bootup?

Hi,
Sorry for my dilatory reply,
Configuring a startup key is another method to enable a higher level of security with the TPM. The startup key is a key stored on a USB flash drive, and the USB flash drive must be inserted every time the computer starts. The startup key is used to provide
another factor of authentication in conjunction with TPM authentication. To use a USB flash drive as a startup key, the USB flash drive must be formatted by using the NTFS, FAT, or FAT32 file system.
You must have a startup key to use BitLocker on a non-TPM computer.
From: http://technet.microsoft.com/de-de/library/ee449438(v=ws.10).aspx#BKMK_Key
For more Q&A about BitLocker, you can refer to the link above.
hope this is helpful.
Roger Lu
TechNet Community Support

A question about the impact of SQL*PLUS SERVEROUTPUT option on v$sql

Hello everybody,
SQL> SELECT * FROM v$version;
BANNER
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
PL/SQL Release 11.2.0.1.0 - Production
CORE    11.2.0.1.0 Production
TNS for Linux: Version 11.2.0.1.0 - Production
NLSRTL Version 11.2.0.1.0 - Production
SQL>
OS : Fedora Core 17 (X86_64) Kernel 3.6.6-1.fc17.x86_64I would like to ask a question about the SQL*Plus SET SERVEROUTPUT ON/OFF option and its impact on queries on views such as v$sql and v$session. Here is the problem
Actually I define three variables in SQL*Plus in order to store sid, serial# and prev_sql_id columns from v$session in order to be able to use them later, several times in different other queries, while I'm still working in the current session.
So, here is how I proceed
SET SERVEROUTPUT ON; -- I often activate this option as the first line of almost all of my SQL-PL/SQL script files
SET SQLBLANKLINES ON;
VARIABLE mysid NUMBER
VARIABLE myserial# NUMBER;
VARIABLE saved_sql_id VARCHAR2(13);
-- So first I store sid and serial# for the current session
BEGIN
    SELECT sid, serial# INTO :mysid, :myserial#
    FROM v$session
    WHERE audsid = SYS_CONTEXT('UserEnv', 'SessionId');
END;
PL/SQL procedure successfully completed.
-- Just check to see the result
SQL> SELECT :mysid, :myserial# FROM DUAL;
    :MYSID :MYSERIAL#
       129   1067
SQL> Now, let's say that I want to run the following query as the last SQL statement run within my current session
SELECT * FROM employees WHERE salary >= 2800 AND ROWNUM <= 10;According to Oracle® Database Reference 11g Release 2 (11.2) description for v$session
http://docs.oracle.com/cd/E11882_01/server.112/e25513/dynviews_3016.htm#REFRN30223]
the column prev_sql_id includes the sql_id of the last sql statement executed for the given sid and serial# which in the case of my example, it will be the above mentioned SELECT query on the employees table. As a result, right after the SELECT statement on the employees table I run the following
BEGIN
    SELECT prev_sql_id INTO :saved_sql_id
    FROM v$session
    WHERE sid = :mysid AND serial# = :myserial#;
END;
PL/SQL procedure successfully completed.
SQL> SELECT :saved_sql_id FROM DUAL;
:SAVED_SQL_ID
9babjv8yq8ru3
SQL> Having the value of sql_id, I'm supposed to find all information about cursor(s) for my SELECT statement and also its sql_text value in v$sql. Yet here is what I get when I query v$sql upon the stored sql_id
SELECT child_number, sql_id, sql_text
FROM v$sql
WHERE sql_id = :saved_sql_id;
CHILD_NUMBER   SQL_ID          SQL_TEXT
0              9babjv8yq8ru3    BEGIN DBMS_OUTPUT.GET_LINES(:LINES, :NUMLINES); END;Therefore instead of
SELECT * FROM employees WHERE salary >= 2800 AND ROWNUM <= 10;for the value of sql_text I get the following value
BEGIN DBMS_OUTPUT.GET_LINES(:LINES, :NUMLINES);Which is not of course what I was expecting to find in v$sql for the given sql_id.
After a bit googling I found the following thread on the OTN forum where it had been suggested (well I think maybe not exactly for the same problem) to turn off SERVEROUTPUT.
Problem with dbms_xplan.display_cursor
This was precisely what I did
SET SERVEROUTPUT OFFafter that I repeated the whole procedure and this time everything worked pretty well as expected. I checked SQL*Plus documentation for SERVEROUTPUT
and also v$session page, yet I didn't find anything indicating that SERVEROUTPUT should be switched off whenever views such as v$sql, v$session
are queired. I don't really understand the link in terms of impact that one can have on the other or better to say rather, why there is an impact
Could anyone kindly make some clarification?
thanks in advance,
Regards,
Dariyoosh

>
and also v$session page, yet I didn't find anything indicating that SERVEROUTPUT should be switched off whenever views such as v$sql, v$session
are queired. I don't really understand the link in terms of impact that one can have on the other or better to say rather, why there is an impact
Hi Dariyoosh,
SET SERVEROUTPUT ON has the effect of executing dbms_output.get_lines after each and every statement. Not only related to system view.
Here below what Tom Kyte is explaining in this page:
Now, sqlplus sees this functionality and says "hey, would not it be nice for me to dump this buffer to screen for the user?". So, they added the SQLPlus command "set serveroutput on" which does two things
1) it tells SQLPLUS you would like it <b>to execute dbms_output.get_lines after each and every statement</b>. You would like it to do this network rounding after each call. You would like this extra overhead to take place (think of an install script with hundreds/thousands of statements to be executed -- perhaps, just perhaps you don't want this extra call after every call)
2) SQLPLUS automatically calls the dbms_output API "enable" to turn on the buffering that happens in the package.Regards.
Al

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