Conceptual question about sequences

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• MAA - RAEVEN & DataGuard conceptual question about Photo (10.2 doc)

  Hello experts,
  
  I have question about the figure:
  'D.1.2 putting into place of a primary of multiple instances with a multi-Instance standby'
  http://download.Oracle.com/docs/CD/B19306_01/server.102/b14239/IMG/rac_arch.gif
  
  page http://download.oracle.com/docs/cd/B19306_01/server.102/b14239/rac_support.htm
  
  Detailed explanation is provideded here:
  http://download.Oracle.com/docs/CD/B19306_01/server.102/b14239/img_text/rac_arch.htm
  
  It is said:
  «This illustration shows a primary database archiving online redo logs to a database, multi-instance multi-instance ensures in a Real Application Clusters environment.» In this configuration, there are two instances of primary database: has the instance primary and primary Instance B. There are also two instances of sleep: standby receiving Instance C and standby recovery Instance D. The definition and purpose to receive the bodies and recovery is described in the text that follows this illustration. Each primary instance uses a LGWR to write again online newspapers and recovery logs archived local processes on the primary instance. In addition, the process LGWR on the primary Instance a sends its changes over an Oracle Net network to the RFS in First Instance B process and to the RFS process on Standby receiving Instance C. primary Instance B sends its changes over an Oracle Net network to the RFS on Standby Recovery Instance D process. The RFS process on each standby instance written in local newspapers do sleep. This figure also shows how the process ARCn on Standby receiving Instance C sends its changes over an Oracle Net network to the process on Standby Recovery Instance D RFS. The process on Standby Recovery Instance D ARCn also archives its changes in newspapers local archived redo. »
  
  Question I would like to ask because I'd like to better understand the Internals:
  (1) why it is written that LGWR writes Archives newspapers and not ARCH process? Is this some sort of error doc. ?
  (2) what is the reason that LGWR sends redo changes made to the FIU to the instance of the same (primary) cluster? What is the purpose? What happens if it has many nodes in the primary? This means that this instance would be multicast it to each of them in this way?
  (3) on the backup site: MRP is located on the D instance in this scenario? (1 single standby instance is applying the data but several can recive redo and write it to the SRls)?

  (1) why it is written that LGWR writes Archives newspapers and not ARCH process? Is this some sort of error doc. ?
  Yes, it seems that this picture has been simplified, and it does not show the level of appropriate detail.
  (2) what is the reason that LGWR sends redo changes made to the FIU to the instance of the same (primary) cluster? What is the purpose? What happens if it has many nodes in the primary? This means that this instance would be multicast it to each of them in this way?
  This shows what we call "cross instance archiving". If you enable this, one storing data on multiple nodes. So if you are in a cluster, and archive locally, if this node dies, so how you get that archive the data to retrieve, put the archives in several places gives you extra security for those who are paranoid. I think that it was more useful in the days where Oracle shipped just archiving logs, now that lgwr writes to the remote node, you are less likely to need it.
  (3) on the backup site: MRP is located on the D instance in this scenario? (1 single standby instance is applying the data but several can recive redo and write it to the SRls)?
  Yes one instance applies to the remake.

• Four basic questions about sequences

  DB version: 11
  
  Question * 1 * and * 2 *:
  To determine the current value of a suite I try
  

   
   SQL> SELECT  SEQ_SHP_HDR.CURRVAL FROM DUAL;
   SELECT  SEQ_SHP_HDR.CURRVAL FROM DUAL
           *
   ERROR at line 1:
   ORA-08002: sequence SEQ_SHP_HDR.CURRVAL is not yet defined in this
   session

  I know that if I use

  SELECT  SEQ_SHP_HDR.NEXTVAL FROM DUAL;

  I can get the sequence CURRVAL. But that increments the sequence.
  
  
  So I tried to look at user_sequences.last_number. But user_sequences.last_number showed 552 when the real currval was 545.
  
  Why I am getting the error above (SEQ_SHP_HDR. CURRVAL is not yet defined in this session) and how can they accurately determine
  the currval in a sequence without increment using NEXTVAL?
  
  
  
  Question * 3 *.
  To increment a sequence,

  alter sequence <sequencename> increment by n ;

  Right?
  
  Use you guys

  SELECT  <sequencename>.NEXTVAL FROM DUAL;

  to increment the SEQUENCE?
  
  
  Question * 4 *.
  
  I was trying to increment a sequence. When the ALTER statement, the sequence did not get incremented. I had to call a NEXTVAL to get actually it reflected. Why is this happening?
  

  SQL> select * from v$version where rownum=1;
  
  BANNER
  --------------------------------------------------------------------------------
  Oracle Database 11g Release 11.1.0.7.0 - 64bit Production
  
  SQL> CREATE SEQUENCE myseq
    2    START WITH 1
    3    NOMAXVALUE;
  
  Sequence created.
  
  SQL> select myseq.nextval from dual;
  
     NEXTVAL
  ----------
           1
  SQL> alter sequence myseq increment by 7;
  
  Sequence altered.
  
  SQL> select myseq.currval from dual;
  
     CURRVAL
  ----------
           1
  SQL> select myseq.nextval from dual;
  
     NEXTVAL
  ----------
           8
  
  SQL> select myseq.currval from dual;
  
     CURRVAL
  ----------
           8
           

  Steve_74 wrote:
  DB version: 11

  Question * 1 * and * 2 *:
  To determine the current value of a suite I try

  
  SQL> SELECT  SEQ_SHP_HDR.CURRVAL FROM DUAL;
  SELECT  SEQ_SHP_HDR.CURRVAL FROM DUAL
  *
  ERROR at line 1:
  ORA-08002: sequence SEQ_SHP_HDR.CURRVAL is not yet defined in this
  session
  

  I know that if I use

  SELECT  SEQ_SHP_HDR.NEXTVAL FROM DUAL;
  

  I can get the sequence CURRVAL. But that increments the sequence.

  So I tried to look at user_sequences.last_number. But user_sequences.last_number showed 552 when the real currval was 545.

  Why I am getting the error above (SEQ_SHP_HDR. CURRVAL is not yet defined in this session) and how can they accurately determine
  the currval in a sequence without increment using NEXTVAL?

  You can't the CURRVAL unless you run the NEXTVAL alteast once in your session. And you cannot use the user_sequences.last_number if the CACHE is enabled.

  Question * 3 *.
  To increment a sequence,

  alter sequence  increment by n ;
  

  Right?

  EVIL! You have actually changed the structure of your sequence. With ALTER comand, you actually set the increment value. Here, "n" sets the size of the increment. If defined as 1 it increments by 1. If as 2 will increment by 2.

  Use you guys

  SELECT  .NEXTVAL FROM DUAL;
  

  to increment the SEQUENCE?

  YES, it's the good way to increment a sequence. Use NEXTVAL to increment a sequence.

  Question * 4 *.

  I was trying to increment a sequence. When the ALTER statement, the sequence did not get incremented. I had to call a NEXTVAL to get actually it reflected. Why is this happening?

  SQL> select * from v$version where rownum=1;
  
  BANNER
  --------------------------------------------------------------------------------
  Oracle Database 11g Release 11.1.0.7.0 - 64bit Production
  
  SQL> CREATE SEQUENCE myseq
  2    START WITH 1
  3    NOMAXVALUE;
  
  Sequence created.
  
  SQL> select myseq.nextval from dual;
  
  NEXTVAL
  ----------
  1
  SQL> alter sequence myseq increment by 7;
  
  Sequence altered.
  
  SQL> select myseq.currval from dual;
  
  CURRVAL
  ----------
  1
  SQL> select myseq.nextval from dual;
  
  NEXTVAL
  ----------
  8
  
  SQL> select myseq.currval from dual;
  
  CURRVAL
  ----------
  8
  

  Response to question 3, it responds as well!

• Conceptual question about WebWorks.

  Hi guys,.

  I am completely new to Mobile development. I have experience coding ASM, C, C++ and c#, but relatively new to web technologies.

  I am trying to get my head around 'Webworks' as a concept. From what I can tell 'Webworks' is a standard? So we can use "HTML5, CSS3 and JavaScript®" and the code in any environment for us and then use 'Ripple' to test and then a command line tool to build.

  So I downloaded Blackberry Webworks API (want to write an application for the playbook), however when I try to install it, it wants to provide a path to adobe air sdk. Why is this? How is Adobe AIR fits in the Webworks sdk?

  I'm sorry if this is a silly question.

  Thank you very much for your time.

  See you soon.

  Here are the instructions:

  http://us.BlackBerry.com/developers/Tablet/WebWorks.jsp

  You need AIR because WebWorks interacts with the hardware through the AIR.

  Coming from c# and if you have no knowledge of Javascript, you can develop in Acrionscript though, unless you plan on releasing your applications on multiple platforms. The reasons being that you would have access to several physical features and other libraries.

• question about stacked sequence

  Hello

  I have a question about stacked sequence.

  I have a stacked with 5 sequences sequence (0,..., 4). I would like to run these as this form

  0, 1, 2, 1, 3, 1, 4, 1 then again 0...

  I don't want to duplicate the section 1 because it contains many objects, variable... One possibility would be to out objects and then duplicate the sequence and use of shift registers, but I don't want to use because in 1, I have some graphs in real time to draw...

  Will there be another (easy) way to do this?

  Thanks for the ideas,

  Concerning

  Why use a stacked sequence?  What you want is a state machine something like this

• Question about mismanagement of the effects in the construction of sequence

  Hi all
  
  I read the BPEL 2.0 document and met a question about management failures and the normal flow of control in the < sequence > construction.
  
  For example, in the following code fragment:
  
  <>sequence
  < call...
  < catch faultName = gt; a.
  < / call >
  < receive... >
  < / sequence >
  
  If fault one is taken and processed by error handler, when the fault handling ends at will are receive > activity start or jumped?
  
  According to the document: < receive > will begin when < call > complements, but the 'complete' includes the 'ends in vain", (i.e. a fault is stuck inside the < call > and dealt with)?
  
  Hope you can help me and thank you very much.
  
  Published by: user8301699 on April 9, 2009 19:04

  Hello

  You have reason, 'full' includes the 'ends in vain", (i.e. a fault is taken inside the and treated).

  Hope this answers your Q.

  See you soon
  Rémy Pucha

• questions about flags (DB_DBT_MALLOC or 0) in DBT

  Hello

  I have several questions about the DBT indicator, which could help make more clear?

  I'm clear on the indicator of DB_DBT_MALLOC / DB_DBT_USERMEM, but when I use get without cursors, which the memory to which refers the pointer stored in the DBT if I use the 0 flag? I need to free the memory?

  Use cursor get, I see examples in the manual always seems to use indicator 0. What memory did reference? Is it safe edit data, it comes then to put new data? I need to free the memory? Can I use DB_DBT_MALLOC /DB_DBT_USERMEM when using cursor get? Is it allowed to use a record of cursor get everything first, then use to replace data from this record without cursor?

  Can you give suggestion when using flag 0?

  Thanks in advance!

  Min

  Hi Min,

  When you use 0, BerkeleyDB will be allocates memory for you, and when you close the cursor memory will be released, so there is no need to free the memory. But the content of this piece of memory is crushed when you call next get of cursor, if you need to save the content if you need it after getting another cursor. You can change the data, but should not change the bytes of this piece, so we suggest you to use your own memory to dial and the data rather than modify the data returned directly.

  The use of DB_DBT_MALLOC/DB_DBT_USERMEM to cursor to get, please consult http://docs.oracle.com/cd/E17076_03/html/api_reference/C/dbt.html for detailed information.

  Finally, if your database is not set with DB_DUPSORT or DB_DUP, you can overwrite a record without cursor. Otherwise, you must use the cursor to replace the data in most cases. Here, crushing him means to change the data, not the key. If you need to change the key, you must do a sequence of delete-add operations.

  For more information on the cursor and set cursor, be sure to check the DBcursor-> and DBcursor-> put Chapter 3.  The DBcursor handle

  Kind regards

  -Winter

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  Hello
  
  I'm new to the world of SOA/OSB. I'm working on a POC from the OSB for our existing application. I have a question about the definition of the URL endpoint to the proxy service. It is possible to specify a generic url endpoint to a proxy service. Something like / SomeService / *. I tried and got errors. Is it possible to do somethig like that or it is a mistake on a conceptual level.
  
  Thank you

  anything you type in the uri of the endpoint of entry will be the contextroot to your service, so /SomeService should indeed be sufficient or as mentioned Pierluigi/SomeService/blabla is also valid (Betty is not a parameter query, but only a part of the contextroot)

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  Hello

  I have a few questions about the progress of the Actions (using the version of track CP7)

  1. What is the function of the action to "continue?"   Out of the peak action and advance the playback cursor?

  2. What does mean this comment "Nested calls to action advanced is a nice improvement."? Is the advanced decision at the top of a page of action tabs?

  3. What is the function of the option "custom" in the IF statement - "preform action if - custom", it doesn't seem to do anything for me?

  4. where can I get information about the timeline / playhead interaction with advanced actions, i.e. where the playhead is going again at the beginning of the slide. slide custom question - display button, e.g. verification of responses, comments - when all the objects are at the beginning of the timeline. I'm looking more for the read head of infromation functionality rather than how to implement this type of question.

  Thank you

  Donal.

  Continue: If an advanced standard action is triggered by a button, this will not trigger the playback head. If you want out, you can use continues. Continue can also be a choice in a conditional action, when one orders branching has nothing to special, but in advance. Continuous is also the "dummy" statement/command (this is the official name of a line in the dialog box advanced actions) If a statement has become unusable due to some reasons, it will be replaced by continue

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  A decision is one of the conditions to be an advanced conditional action. They allow to create more complex actions, as a loop or arrays are not possible. All decisions are executed in sequence and always.

  Custom: is a combination of or but it is rather limited, because you cannot use parentheses.

  I guess you'd better visit my blog if you want to learn more about the advanced actions.

  http://blog.lilybiri.com/

  I also did several Webinars on stocks advanced, last this afternoon (on the sharing of the actions) for Adobe. They are all available on request.

  Lilybiri

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  Hello

  I have a conceptual question for you. I create a module of sequencing with a group of option buttons in frame 1. When a user clicks on the wrong radio button he told them. When click the right one he moves to frame 10. In frame of 10 the correct radio button is hidden, and the user should click the following in the order. If they snap ill that she told them and if they click on the right pair he gives new comments and advances to frame 20 and so on until they get everything in order.

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  Sage

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  All,
  
  I have a few questions about the implementation of iProcurement stores-
  
  1 oracle comes seeded with 2 stores "Backend" and "Exchange.Oracle.com. We do not have the use of these stores. I don't see an option to turn them off. Is it advisable to delete them? They occupy unnecessary space and are seen first. I read this on Metalink Note ID 429470.1 - "NOTE: while the value can be changed, it is highly recommended to not under any circumstances ever remove"Main store"page stores to manage content in iProcurement catalog administrator responsibility.» Do not know why.
  
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  Hey,.
  To answer your Questions
  1. you can always delete those either if you want to... The reason why the link Meta Notes say not only not to delete the main store is
  i. because main store has all of the Local content in iProcurement (i.e. If you have any installation of items in the inventory you and them Module iProcurement Enabled (IE can be purchased at iProcurement) and any other article of local catalogues/categories Loaded using the BULK LOADING in iProcurement is also removed.)
  II. you can always delete the information Exchange Oracle store if you do not use.
  I would advise so do not remove the main store. Instead, you can change the sequence of the display of the stores you iProcurement Page.
  Browsing ==> Internet shopping Catalog Admin (RESP) ==> eContent crib ==> content management ==> stores ==> press the update sequence and make sure that the sequence number for main is superior to any other store so that the hand store falls last in the House of iProcurement Page

  2.i don't think that there is no option to do this. but you can always open an SR with Oracle about it and ask this question\

  hope that answers your Question.

  Thank you
  SANTU

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  I have about seven questions about Firefox OS. I'm potentially interested in opting for a tablet that works instead of Android or iOS. I couldn't find a place to ask questions like that. Thank you!

  https://support.Mozilla.org/en-us/forums/Firefox-OS-English-Forum

  There is another option.

• About a month ago I posted a question about iMovie and not being able to "share". I solved the problem thanks, so no more emails!

  About a month ago I posted a question about iMovie and not being able to "share". I solved the problem thanks, so no more emails!

  Hi Michael,

  If you want to stop receiving notifications by electronic mail, in the thread, that you have created, then I suggest that you follow the steps below:

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• Where and how do I ask questions about Email?

  The Commission opening thingy is complicated, I have trouble finding my way around it.  I don't know where or how questions about email.  Is there an easier way than trawling through all these icons?  Like a list or something - as you get on all other forums on the internet?

  It would be a good starting point: Mac mini

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  Thanks for your help,

  Zekelegge

  Hi!, zekelegge:

  Welcome to Forum!

  The only printer I use, 50G calculators, 48GII, 39GS and 17BII +, as well as many former models, such as the 48 s/SX/G/G + / GX, 38 G, 39 G, 42, 41 C/CV/CX and 28 C/S, is the infrared printer HP 82240 b. If you can use the emulator HP50G, on the PC, the simulator of the printer, you can download, since... http://www.HPCalc.org/details.php?id=7386

  The printer... HP 82240 B

  

  The cable series...

  

  The description... http://www.allenwan.com/hpcalcserialcable/

  The original cable...