database queries of list

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• How can I make effective * Dynamics * xml database queries?

  How can I make queries efficient dynamic xml based?
  
  Oracle database 11 GR 1 version material, I tried it on 11 GR 2 as well.
  
  I have a requirement where I went from 10 search gui settings. All parameters are optional, and the user is allowed to enter all the details in the fields in any combination they like. At least one parameter will be filled more every 10.
  
  I have millions of records in the table and have created a xmlIndex on the xmlType column.
  
  I dynamically build the necessary xQuery of the arguments and use bind variables, so there is only a hard analysis for each "type" of the request.
  
  But when I try this I get an error:
  
  ORA-32512: external 'xquery variable' type is unknown
  
  
  So, how to create a query based dynamic xml?
  
  I think that it is possible that I can create variable bind in sql * more and run a SELECT statement, modify the content of the variable and re - run the query and it performs as I expect, but I can't replicate this functionality within pl/sql.
  
  I tried to do it using the dbms_sql package I shall not know the number of bind to the run-time variables. When I try this, I get the error message:
  
  ORA-32512: external 'xquery variable' type is unknown
  
  If this isn't the right way, how to create dynamic xml queries (when running) founded, using bind variables within the database?
  
  I created a minimal example to demonstrate:
  

  CREATE TABLE xmlTest
  (
          id      NUMBER(10,0) PRIMARY KEY,
          theXml  xmlType
  )
  /
  
  DECLARE
          l_sql VARCHAR2(100) := q'<SELECT id FROM xmlTest WHERE xmlExists ('/a[b=$b]' PASSING theXml, :b as "b")>';
          l_b   VARCHAR2(10)  := '1';
  
          l_curId INTEGER;
  BEGIN
          l_curId := dbms_sql.open_cursor;
  
          dbms_sql.parse (c             => l_curId,
                          statement     => l_sql,
                          language_flag => dbms_sql.native);
  
          dbms_sql.bind_variable (c     => l_curId,
                                  name  => 'b',
                                  value => l_b);
  END;
  /

  When I run the present, I get:
  

  DECLARE
  *
  ERROR at line 1:
  ORA-32512: type 'xquery external variable' is unknown
  ORA-06512: at "SYS.DBMS_SQL", line 1053
  ORA-06512: at line 9

  Line 9 is the declaration of dbms_sql.parse.
  
  Thank you very much
  Gary.
  
  Published by: GPN & amp; GT; on February 18, 2011 10:57

  Hello

  Try with an explicit cast of the binding variable:

  SQL> CREATE TABLE xmlTest
    2  (
    3    id      NUMBER(10,0) PRIMARY KEY,
    4    theXml  xmlType
    5  )
    6  /
  
  Table created
  
  SQL> insert into xmltest values(1, xmltype('1'));
  
  1 row inserted
  
  SQL> insert into xmltest values(2, xmltype('2'));
  
  1 row inserted
  
  SQL> set serveroutput on
  SQL>
  SQL> DECLARE
    2
    3    l_sql   VARCHAR2(200) :=
    4    q'';
    9
   10    l_b     VARCHAR2(10)  := '1';
   11    l_curId INTEGER;
   12
   13    l_id    NUMBER;
   14    dummy   NUMBER;
   15
   16  BEGIN
   17
   18    l_curId := dbms_sql.open_cursor;
   19
   20    dbms_sql.parse (c             => l_curId,
   21                    statement     => l_sql,
   22                    language_flag => dbms_sql.native);
   23
   24    dbms_sql.bind_variable (c     => l_curId,
   25                            name  => 'b',
   26                            value => l_b);
   27
   28    dbms_sql.define_column(l_curId, 1, l_id);
   29    dummy := dbms_sql.execute_and_fetch(l_curId);
   30    dbms_sql.column_value(l_curId, 1, l_id);
   31
   32    dbms_output.put_line('ID = '||to_char(l_id));
   33
   34    dbms_sql.close_cursor(l_curId);
   35
   36  END;
   37  /
  
  ID = 1
  
  PL/SQL procedure successfully completed
   
  		    
              
             
   
  		     
  Model for caching the results of database queries?
   
  			 I am interested in the caching of certain common and slow query results in a cache consistency and would like some suggestions on models of 'good '.
  
  
  In this case you would use a cache next to the model to the data stored in the cache/database where all updates are written to the cache and the database using a XA transaction (we need to do it this way because there are certain requirements of coherence that are difficult to check (at least with correct performance) by using only the cache). We intend to use a "near cache" with a rear limited size.
  
  
  We plan to invalidate the "saved query result cache" as part of each transaction update (we have a few simple rules which determine what query results that must be discarded for each change).
  
  
  The part that is a bit tricky is to make sure that no application is perhaps underway while an update of the data related to the query is also underway where the invalidation might be carried out until the result of the query is inserted in result cache... I am not concerned about order of exact time between queries and updates that are ongoing at the same time, but must be 100% sure that no "outdated" information remains (or can be inserted!) in the cache after the update was signed...
  
  
  It is not enough to rely on the expiration of the time based on the result cache (I would have to set the time so short that the cache would not give a lot of improvement)
  
  
  I think something like the following:
  
  
  When you perform a query (which can already caching):
  
  
  1. do a dirty read against the result cache to determine if a query with the specified result already exists here - if so use it!
  2. If it is not found lock, a key with the specified parameter, and when the lock is obtained to check once more that there is still no value, if there now to unlock and use it!
  3. If there is still no value run the database query, save the result in the cache, unlock and use the result
  
  
  
  
  When you make a change using a XA transaction:
  Remove records from query results in the cache corresponding to the changes - this can be done without first checking if there is really no result for the parameter or not.
  I guess the stage of preparation of the transaction will lock the deleted records in the cache of query result preventing the invalidations and simultaneous updates...
  
  
  Everyone sees a few windows of vulnerability here? For example, it is possible that the cache owned by the XA transaction lock is released before the update of the database has finished (thus a request could be carried out against the old data and be stored in the cache after the invalidation have been performed) or what exactly the kind of problems that the XA protocol designed to prevent?
  
  
  An alternative I've been thinking about how to run the database query / caching the result would be to leave a store class hides (for query result cache) execute queries when no entries exist in the cache, but I don't know how I would change the locking protocol to make it work - can I still lock a cache by this type or component entry , or which would result in a block?
  
  
  Suggestions, thoughts etc. are much appreciated!
  
  
  Best regards
  Magnus			 
  Hi Magnus,
  Everyone sees a few windows of vulnerability here? For example, it is possible that the cache owned by the XA transaction lock is released before the update of the database has finished (thus a request could be carried out against the old data and be stored in the cache after the invalidation have been performed) or what exactly the kind of problems that the XA protocol designed to prevent?
  
  If the query is executed as you described and your application can take the same lock of keys to query before you update the data and only released the lock, once the transaction is complete, you can be assured that a query based on outdated information will not be cached after the transaction. If you want to be sure that no stale query results will be returned, remove the result cached outside of the transaction just before the validation of the transaction.
  An alternative I've been thinking about how to run the database query / caching the result would be to leave a store class hides (for query result cache) execute queries when no entries exist in the cache, but I don't know how I would change the locking protocol to make it work - can I still lock a cache by this type or component entry , or which would result in a block?
  I think that you can implement a class of dumps for query result cache that can be used to provide the appropriate locking device. If implemented correctly, I don't think that there is a risk of blocking.
  Kind regards
  Harv
  		   
   
              
             
   
  		     
  Application crashes on execution of database queries.
   
  			 
  Hello
  I work on device BlackBerry Curve 9220, after completing the select query, my fair application crashes and closes.
  I have not found no exception detected in the catch block, while I could see the following message on the console.
  can someone tell me or guide me how to deal with this error. As I understand it, it's DB connections must be made from other threads and not the UI thread main which is exactly what I'm doing in my code and yet app crashes which worked like a charm all these days.
  Error message on the console is...
  Olympia: Waited longer than 6000 milliseconds waiting for event for response to the type of event
  Any kind of help is appreciated
  			 
  OK, this seems to be java of BB code, I'll ask a mod to move the post to the appropriate forum.
  Maybe you have a misconception to the invokelater subject, it is used to perform tricks ON the thread of the event.
  For more information, see
  
  https://supportforums.BlackBerry.com/T5/Java-development/what-is-the-event-thread/Ta-p/446865
  to run something async you could create a new Thread and call start() on it.
  		   
   
              
             
   
  		     
  Identify the best CPU using multiple queries on the database environment
   
  			 Hello
  
  
  We live high CPU on one of our development servers (AIX 6/11 GR 2). It has several databases and we need check the queries that are causing hiking of the cpu.
  
  
  So, how can we specific database queries and it is when there are multiple databases?
  
  
  I could use nmon to get the process, $ query session v and v $, v$ sqlarea, if there is only one.
  
  
  Thank you!			 
  Hello
  There will be no direct approach (check if GRID allows to control/OEM), AWR and STATSPACK review should be best approach once and for all the DB to fix permanently, if not then...
  Identify top/topas/nmon top or 10 os process ID's, although they features will look like unless the owner is different.
  Return to the command prompt using ps - ef
  ajay@cts-db-vashi#ps -ef| egrep -i "8716444|7471138|12451978"
  oracle9i  8716444        1   0   Dec 14      - 291:51 ora_dia0_CTS
  oracle9i 12451978        1   0   Dec 14      - 62:50 ora_vktm_TBMS
   
  
  If you don't want to use top/topas/nmon use below with appropriate sort to get high cpu/memory process & pass it to v$ for more details in sqlplus
  /usr/bin/ps aux |/usr/bin/sort -nrk 3,3 | egrep -iv "root" | head -10
  
  Thank you
  Ajay more
  http://www.moreajays.com
  		   
   
              
             
   
  		     
  Loading data into the list when necessary
   
  			 
  HI all,
  I'm a huge display of data from database in the list,
  I do not want to load all the data in one shot, I want to show also responsible, means (if the user scroll the list automatically loads the data from my db?)
  any ideas?
  Thank you
  			 
  You will need to check whether sqlite supports offsets and limits.
  http://www.SQL.org/SQL-database/PostgreSQL/manual/queries-limit.html
  		   
   
              
             
   
  		     
  Table reserved to the choice list?
   
  			 Hello
  
  
  My requirement is to use a table that is purely for the purpose of fill in a drop-down list in the list for a command prompt in a dashboard command prompt - is it possible without setting up the table in the repository - as I don't want anyone actually run reports on my data source?
  
  
  
  
  Thank you
  
  
  Robert.			 
  Robert,
  As mentioned above, the only place to get around the RPD is with direct database queries. You cannot use these to complete line of dashboard.
  The easiest way would be to expose the table in a new MDB, cat presentation personalized with the same Table_Name.Column_Name the other Cat presentation fields you want the guest to effect and go from there.
  As far as I know, it's the only way.
  See you soon
  Alastair
  		   
   
              
             
   
  		     
  Database direct request & invite
   
  			 Is it possible to use the prompts in a basis of the request on a "request for direct database". How do I access the prompt variables in my SQL query?			 
  Yes, you can use the prompts in the direct database queries
  for example
  a direct request:
  "Select * from table1 where column1 = ' @{somevar1}"
  then online dashboard, set somevar1 as a drop-down list of the set variable variable.
  That should do it.
  		   
   
              
             
   
  		     
  How to remove line before Panel table with databases?
   
  			 
  Hi friends,
  I created the table creation of database for the list of users. Which works very well. And I also recover data that is I've stored previously and I have displayed in table format on the front. Now, I want to delete a whole line, is not a wise order, for example, now, I have a table, there total 7 rows and 5 columns. Now, I want to delete the 3 rows using by selecting the line (i.e., click anywhere in this line and press the button) that day that the rank will be remove from the database. Then remaining will again store in the database.
  I want this way is it possible or not?
  Thanks
  Concerning
  Joel M
  India
  Note: I use the LabVIEW database connectivity toolkit
  Database: Ms access
  Sorry for my grammatical error
  			 
  arun575 wrote:
  Hi friends,
  [...] Now, I want to delete the 3 rows using by selecting the line (i.e., click anywhere in this line and press the button) that day that the rank will be remove from the database. Then remaining will again store in the database.
  
  Instead of storing data in the database, simply remove the record that you have removed from your FP indicator and recharge the light on the database.  (The first column in my database is named ID - autoindexed, the primary key)
  
  EDIT - only sub blue-vi is https://lavag.org/files/file/60-array-point-to-rowcol/
  		   
   
              
             
   
  		     
  Select the string table drop-down list box.
   
  			 
  Hi all
  I want to select the combo box list based on a string in the entry, I don't know how to do this. I have a drop-down list box and the value comes from a database, what I want to do is I want to change the value of the selected box based on the existing value in the database drop-down list. for example, A, B, C D I strings in the drop-down list box, and then in my database, I have a field with the string C, I want to change the C to A. I can't enter the value of C in a string format, but I don't know how to be the first position of the drop-down list box in so the order of channels combo box will be C, A, B, d., the value of C
  Thank you
  			 
  Then just write a new array of strings, with the elements of the new agenda, to the "[] strings" - property.
  Either you must code something that allows you to create an array of strings with the elements in the order that you want them to be. If there is a reorganization only, you could do something like:
  -Get the array of strings [] from the drop-down list using a property node box.
  -Find the position of the element you want to place first and use "delete from table", which returns the new array and the element removed.
  -Build a new table 1 d of the deleted item and table remaining. Move to the second combobox Strings [] property of a node property.
  		   
   
              
             
   
  		     
  How to create a database using Labview7.1, as library management system?
   
  			 
  I want to use labview7.1 to create a database as the system.but management library I don't know how to do it.could you show me how to make it happen?
  			 
  To run database queries, OR sell the database connectivity Kit. However, given that your version of LabVIEW is no longer supported, I don't know if you could buy it. Your other option is to use LabSQL. Two of them are based on ADO. The Toolbox mask some SQL commands low level but you can find plenty of tutorials SQL and should be able to get updated quickly enough. LabSQL is what I use in my LabVIEW applications.
  The effective creation of a database is usually done in the database environment itself (for example, you use Access to create a Jet database). It is not really related to LabVIEW at all and appropriate database design is a long topic. If you know the system database that you want to use, someone might be able to point to specific aid.
  		   
   
              
             
   
  		     
  Search ACS 4.2 order unknown user from database
   
  			 
  Hello
  I have several user databases in the search order for the unknown user policy. Ignoring the manual (http://www.cisco.com/en/US/partner/docs/net_mgmt/cisco_secure_access_control_server_for_windows/4.2/user/guide/UnknUsr.html#wp277530), which States that, after the failure of authentication from the first database (Windows) the ACS does not continue to look for the second database, a RADIUS server. I see that, with the failure in the first user, database stops the ACS research and fails to the user authentication with an authentication failure code "external DB password invalid.
  Documentation not going or is this a bug in the ACS v4.2.1? How can I make the ACS to continue to seek the second database user?
  			 
  Hello Roberto,.
  If the external database returns an invalid username/password, then it is intended for ACS is not to check the following data in the sequence and the failure of authentication:
  http://www.Cisco.com/en/us/partner/docs/net_mgmt/cisco_secure_access_control_server_for_windows/4.2/user/guide/UnknUsr.html#wp277502
  "For authentication requests, ACS applies the unknown unknown user policy to users. ACS does not backup to the known or discovered users authentication failure unknown when user authentication support. »
  If you want that ACS to verify the following database, even if a response from the invalid username/password has been received, you will need to explicitly set this on the external Windows database configuration page, in the section entitled 'Strategy for the unknown user' (but on the database configuration page specific Windows, not covered by the unknown user policy) :
  http://www.Cisco.com/en/us/docs/net_mgmt/cisco_secure_access_control_server_for_windows/4.2.1/User_Guide/UsrDb.html#wp354338
  In addition, on the previous screenshots, I could see that you have configured both as a result of database:
  Windows database
  RADIUS Server token
  So we may be running into a situation where the authentication method used is not supported by the tokens, Radius servers, and therefore impossible to check the second database in the list:
  http://www.Cisco.com/en/us/docs/net_mgmt/cisco_secure_access_control_server_for_windows/4.2.1/User_Guide/UsrDb.html#wpxref36799
  http://www.Cisco.com/en/us/docs/net_mgmt/cisco_secure_access_control_server_for_windows/4.2.1/User_Guide/Overvw.html#wpxref846
  Kind regards
  Fede
  --
  If this helps you or answers to your question if it you please mark it as 'responded' or write it down, if other users can easily find it.
  		   
   
              
             
   
  		     
  List of Fatal Oracle Error Codes
   
  			 
  Anyone know or have the list most common ORA codes requiring a system restart or reconnect to the databases. I list below, but I was wondering if there is more
  -1100 at-1000
  -4000 to-3000
  -7000 to-6000
  -13000 to 12150
  -2068
  Thank you
  Richard
  			 
  Hello
  For the complete list "ora errors", please visit http://docs.oracle.com/database/121/ERRMG/toc.htm
  Search words using criticism/fatal/warm start/warmstart, I get errors in sample according to your request.
  2980747 wrote:
  
  
  ... Codes ORA that requires a restart of the system or the database log...
  ORA-00447: fatal error in background process
  ...
  Action: The hot start System.
  ORA-00348: unique process repeat failure. Must give up instance
  ...
  Action: Shutdown abort and warmstart the database.
  HTH
  		   
   
              
             
   
  		     
  Impact of Exadata database
   
  			 
  Dear gurus,
  Please share your valuable comments what will be the impact on database queries and sql on Exadata full rack when disk_asynch_io = false and filesystemio_options = asynch or setall?
  As of now I have not test machince on Exadata to test above scenerio, so just wanted to know your point of view? Pleae share.
  Thank you
  Jihane Narain Sylca
  			 
  All right
  When you use ACFS as the file system that is basically like a dumb file system, you lose most of the benefits of Intelligent storage. Therefore, it is quite possible that dbwriter will return to the use of the standard i/o system calls to access the files on acfs. Note that you referenced
  		   
   
              
             
   
  		     
  The specified display list is invalid or points of view have been selected using a different pattern
   
  			 
  Hello Experts,
  I get an error when I perform the aggregation using the aggregation view which was working fine before. We have ASO cube.
  'The list of the specified view is invalid or points of view have been selected using a different scheme'
  No major changes has been (as change the ownership/megaupload type etc).
  No addition of level in one of the dimension.
  Only members are added at the same level
  Please let me know what would cause to become invalid.
  Thank you
  Raja Mohamed
  			 
  RajaMohamed wrote:
  The change is only the addition of members at the same level.
  Only way I can see what is possible is if the dimension change your attributes, and where you had already all members, associated with an attribute, you have now a few not associate members.
  Take a good copy of the outline (or restore from backup) and run the MaxL following on the old and the new cubes:
  query database app.db list aso_level_info;
  
  That should show you where the differences are.
  		   
   
             
            
           
  		
   
            
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   database queries of list 
   
         
   How can I make effective * Dynamics * xml database queries? 
   
         
   Model for caching the results of database queries? 
   
         
   Application crashes on execution of database queries. 
   
         
   Identify the best CPU using multiple queries on the database environment 
   
         
   Loading data into the list when necessary 
   
         
   Table reserved to the choice list? 
   
         
   Database direct request & invite 
   
         
   How to remove line before Panel table with databases? 
   
         
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   How to create a database using Labview7.1, as library management system? 
   
         
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