Locks on temporary tables

Similar Questions

• on a global temporary table

  forms_ddl ('truncate table storage reuse SUB_BF');
  
  Insert / * + APPEND * / select into SUB_BF * from SUB_TEMP_BF;
  
  
  Hi all
  
  sub_bf is an ordinary table and sub_temp_bf is gtt (global temporary). and a report is complete based on table sub_bf. but when I use the delete instead of truncating PMT statement
  then come reports, but when I use the reports truncated only shows all values.
  
  I can't use delete statement because he is slow and my user simultaneously generate the report for sub_bf tables become lock. and longer reports crashes.
  
  BR.
  
  Sanjay

  Hello
  Truncate commit implied.
  Therefore, do not use ON COMMIT clause when creating your TWG to the data in the temporary table persists for the duration of a session no transaction.

• active sessions for the global temporary table

  Hello
  
  Is there no view or the way to know how many active users evaluate a global temporary table?
  
  Rgds,
  Piyush

  The following query should list the user accounts writing (with INSERT/UPDATE/DELETE) into the temporary table 'TWG' belonged to "O":

  select s.username, l.sid
  from v$lock l, v$session s
  where l.id1 =
  (select object_id from dba_objects where owner='O' and object_name='GTT')
  and l.sid = s.sid;
  

  The following query should list all user accounts by using the temporary table named "GTT" with SELECT/INSERT/UPDATE/DELETE statement:

  select username
  from v$session s, v$access a
  where s.sid = a.sid
  and object ='GTT';
  

  Edited by: P. Forstmann on June 9, 2010 09:40

• change a table into a temporary table?

  I doubt that you can read online, but I thought I'd ask. Can change us a table into a temporary table?
  
  If so, how? Otherwise, all methods on a way around this?
  
  In fact, they are regular tables so we have several tables that developers created as temporary tables, but not included no clause of temp.

  The CREATE GLOBAL TEMPORARY TABLE statement creates a temporary table which can be transaction-specific or specific to the session. For temporary tables of operations, there are data for the duration of the transaction. For session-specific temporary tables, there are data for the duration of the session. Data in a temporary table are private to the session. Each session can only see and modify their own data. DML locks are not acquired on data from temporary tables. The LOCK statement has no effect on a temporary table because each session includes its own private data.

• How to use SQLite temporary tables?

  As read here: http://docs.blackberry.com/en/developers/deliverables/8682/BP_Optimizing_SQLite_database_performance...

  Use temporary tables. Do this only if you do not need data to be available following a reset of the BlackBerry device.

  Read here: http://www.sqlite.org/tempfiles.html

  Tables created using the syntax "CREATE THE TEMP TABLE" is visible only to the connection of database in which the "CREATE TEMP TABLE" statement is initially evaluated.

  The confusing part is that if I create an instance of database for temporary tables with a single statement of DatabaseFactory.open, I am only able to use this same instance of database throughout my entire application?

  So, using the same variable throughout the entire application?

  It also means that I can not close the database connection?

  Here is information on temporary tables of SQLite:

  http://www.SQLite.org/tempfiles.html#tempdb

  (1) you must call 'CREATE TABLE TEMP' every time when you open a database if you need this chart.

  (2) temporary table deleted as soon as you close the database. This means you need to keep the database connection open if you want to run previously inserted/updates of records into a temporary table.

  Thank you

  Eugen

• Are global temporary tables, a standard feature of Oracle?

  I apologize for introducing me to this community with what must seem like a very stupid question...

  I am a software developer, working on a product that uses Oracle as its database, specifically Oracle 11 g Enterprise Edition. Recently, I solved a problem of performance by converting an ordinary table into a global temporary table. Before my boss allows me to put this change in the product, it wants to be sure that global temporary tables are a standard part of Oracle, not something that the customer must install separately or pay extra for. (This is the first time that we never used them in our product, so I think that most of the team are not familiar with them).

  I know that Oracle has had global temporary tables since the last millennium, so if ever, they have been a feature of the premium, they are unlikely to be now, but the boss wants me to get independent confirmation of this.

  Thank you.

  Steve Pemberton

  Here you can see "feature availability by Edition":

  http://docs.Oracle.com/CD/E11882_01/license.112/e47877/editions.htm#DBLIC116

  TWG tables is not even mentioned, which means that they do not belong to the functional components are paid separately.

  One caveat - if you have an application that uses connection pooling, it is recommended to use ON COMMIT DELETE ROWS, not ON COMMIT PRESERVE ROWS

  (or always use explicitly "DELETE gtt_table" at the beginning), because otherwise a user of the application can display the data TWG who has previously made a second user of the application.

  Kind regards

  Zlatko

• PLS-00357 on a global temporary table

  Oracle 11g R2

  I am using a dynamic SQL statement to delete rows. The WHERE THERE EXIST uses a global temporary table and it gives me

  PLS-00357: Table, view or reference sequence "TMPPRE_ARC" not allowed in this context

  Any ideas of a work around?

  create global temporary table tmppre_arc
    ( id number)
    ON COMMIT PRESERVE ROWS;
  
  
  CREATE OR REPLACE PROCEDURE test_del
  IS
     v_owner_tbl varchar2(61) := 'test_table'     ;
  BEGIN   /* DELETE_SOURCE */
          EXECUTE IMMEDIATE
              'DELETE FROM ' || v_owner_tbl || ' v ' || chr(10) ||
              'WHERE EXISTS ( SELECT    null '       || chr(10) ||
              'FROM      ' || tmppre_arc || ' r '  || chr(10) ||
              'WHERE       r.id     = v.id )' ;
  END test_del;
  /
  show errors
  
  
  LIsNE/COL ERROR
  -------- -----------------------------------------------------------------
  5/9      PL/SQL: Statement ignored
  8/29     PLS-00357: Table,View Or Sequence reference 'TMPPRE_ARC' not
  allowed in this contenxt
  
  
  
  
  
           allowed in this context
  

  This is false:

  'FROM ' | tmppre_arc | ' r '  || Chr (10) |

  Should be

  "OF tmppre_arc r | Chr (10) |

  SY.

• find global temporary tables

  Hi all

  How to find global temporary tables in all_tables, is this possible?

  What:

  
  select * from all_tables where temporary = 'Y';
  

• Local temporary table

  Hi all

  Oracle version: 11g.

  I know how the global temporary table in Oracle. But I've never heard of local temporary tables. I e cam all over and I tried to create one by Googling. But could not create.

  The syntax I used is,

  DECLARE LOCAL TEMPORARY TABLE test_sk5 (col1 number, col2 NUMBER);
  

  Can you please shed some light on local temporary tables.

  THX & regards,.

  Shan.

  Everything you have found by Google (it would have been helpful if you showed us the real link) is not for Oracle.

  So I will throw the light: they do not exist

  Edit: when I google for 'local temporary table oracle', I found a thread on this same site where someone asked the same question with the same type of example and got the same answer, the additional information that the syntax is apparently from RDB.

• Campus solution 9.0: engine Application parallel treatment of the Instances of the temporary Table

  People,

  
  Hello. I'm working on 9.0 Solution on a University Campus. I'm working on the module of Community Campus. I face a problem like below:

  
  Campus Community > personal information > add/update a person

  
  I can type in all the information for a person successfully and save it with success. But what research, it does not return anything to PS user
  This is because the security of access to demographic data is not granted to the user. So, I put security as below:

  
  Step 1:

  Set Up AWAR > Security > Secure Student Administration > permissions list > access to demographic data: I have select permission list HCPPALL and EOEI9200 for the PS user

  Step 2:

  Set Up SACRED > Security > Secure Student Administration > process > access to demographics: the process to initialize the authorization indicates to the user PS process program is the Application Engine. The process name is MSK_CFG. The process is not successful and returns an error as below:

  Table or view does not exist. Has no SQL statement: Truncate Table USER.PS_MSK_CFG_TAO4.

  
  The above error is that of the motor parallel processing Application on instances of the temporary table. There are 2 modes: online and batch. I run it in 2 modes as below:

  Online mode:

  Step 1: Navigator PeopleTools > Public Services > Administration > PeopleTools Options: I change 3 to 4 for the Instance of the Temp Table total and online.
  Step 2: Create a new control ID Temp1 and execute processes on Navigator SetUp > Security > Secure Student Administration > process > process of demographic data. The MSK_CFG process runs successfully, but the output file contains the message:

  ATTENTION: Application request engine is not active! Suspended treatment!

  
  So I run of steps 3, 4 and 5 in Batch mode as below:

  Step 3: Navigator PeopleTools > Application Engine > application Application Engine > engine Application request Page > add a new control ID Temp1.
  Step 4: Run the MSK_CFG with Temp1 process again and get the error:

  Table or view does not exist: Truncate table USER.PS_MSK_CFG_TAO5.

  Step 5: I change 4 to 5 navigator PeopleTools > Public Services > Administration > page PeopleTools Option for the Instance of the Temp Table total and online.

  Re-run the MSK_CFG process and get the error:

  Table or view does not exist: Truncate table USER.PS_MSK_CFG_TAO6.

  I have increase by 5-6 for the temporary Table instance and re-run the MSK_CFG process and get the same error with incremental number:
  Table or view does not exist: Truncate table USER.PS_MSK_CFG_TAO7.

  I have increase by 6 to 7 and re-run the MSK_CFG process and get the same error:
  Table or view does not exist: Truncate table USER.PS_MSK_CFG_TAO8.

  The maximum is 99, I continue to adding 1 to the Temp table instances and run the MSK_CFG process. But get the same error with differentials 1 as below:

  Table or view does not exist: Truncate table USER.PS_MSK_CFG_TAO9.
  Table or view does not exist: Truncate table USER.PS_MSK_CFG_TAO10.
  ... ...

  Table or view does not exist: Truncate table USER.PS_MSK_CFG_TAO99
  Table or view does not exist: Truncate table USER.PS_MSK_CFG_TAO.

  My question is:

  Because the engine of the application is not active with a new control ID Temp1 in online mode, I add the new control ID Temp1 in the Application engine page request but get the error above.  How to solve the error above to begin the process of MSK_CFG?

  Thanks in advance.

  People,

  Hello. The problem is solved by myself.

  The thing is that we need to open the MSK_CFG_TAO of the temporary Table in the application designer and build. After construction, the table PS_MSK_CFG_TAO and PS_MSK_CFG_TAO1 come in the database.

  MSK_CFG process runs correctly now. Personal information of search returns data successfully. Thank you.

• Create a temporary table using EXECUTE IMMEDIATE

  Hello

  I need to create a report more complex which must have three different queries. I use a determined IF clause that the query that uses the report, according to the parameters.

  I want to write the output to a csv file, so I created a PROCEDURE.

  The first package of the procedure has the three SQL and the IF clause in order to determine the query that the report uses and stores the query code in a variable (v_sql), which is passed to the PROCEDURE that needs to write to the output of the report.

  I tried to create a table with data from the request in order to make a LOOP and exit, something like this:

  WRITE_FILE (errBUFF of the PROCEDURE	OUT VARCHAR2,
  	retCODE	OUT VARCHAR2,
  	v_sql	IN VARCHAR2)

  IS

  Contor

  NUMBER;

  BEGIN

  	EXECUTE IMMEDIATE v_sql;
  	SLIDE G
  	IS
  	Select * from XXROR_REG_MF_TBL;
  	--
  	-initialization
  	--
  	retCode: = 0;
  	errBUFF: = NULL;
  	Contor: = 0;

  	--
  	-cursor
  	--

  	FOR X IN G
  	LOOP
  	APPS. FND_FILE.
  	PUT_LINE)
  	APPS. FND_FILE. OUTPUT,
  	....)

  I should mention that v_sql is something like:

  CREATE GLOBAL TEMPORARY TABLE ACEs (SELECT * of the double);

  I can't really do that, so I was wondering if you have any suggestions

  Thank you

  Claudiu

  Hello

  I don't think you need a table at all. You can set the cursor based on the SQL passed as parameter

  https://docs.Oracle.com/database/121/LNPLS/dynamic.htm#LNPLS629

  Concerning

  Marcus

• CANCEL reading and overall-TWG temporary table

  Hello Expert!

  Based on an analysis made by my colleagues... He mentions on a compound of SQL to extract data only to leave a TWG and overturn readings! (Current_obj # ash captured as a event 0 and wait - db_file_sequential_read)

  The thought difficult to obtain a cancellation reason reading when extracting data from TWG!.

  On cancellation, cancellation would be needed!

  But as TWG specific Session, at any time in my session would read the latest copy for all operations. This reading must come from a buffer or disc (Temp).

  Why a reading of cancellation will be required?

  Can you please help me understand a scenario where cancel read for TWG is valid or unrealistic?

  Or conceptually missed something?

  Based on an analysis made by my colleagues... He mentions on a compound of SQL to extract data only to leave a TWG and overturn readings! (Current_obj # ash captured as a event 0 and wait - db_file_sequential_read)

  The thought difficult to obtain a cancellation reason reading when extracting data from TWG!.

  TWG activity generates CANCEL as a result of DML for any table. Which CANCEL then also causes RESTORE to be generated.

  On cancellation, cancellation would be needed!

  OK - but this isn't the only case of use.

  But as TWG specific Session, at any time in my session would read the latest copy for all operations. This reading must come from a buffer or disc (Temp).

  And that is where you get off the track. These statements are NOT correct.

  A session can open several sliders on these data TWG and these several cursors can represent a different "coherent reading" as far as data is concerned.

  Tom Kyte explains better in this AskTom blog.

  https://asktom.Oracle.com/pls/Apex/f?p=100:11:0:P11_QUESTION_ID:4135403700346803387

  and we said...

  Yes, temporary tables generate UNDO - and therefore to generate REDO to CANCEL it.

  Do it again for the cancellation must be created because Cancel is treated the same, the undo tablespace seems to be corrupted on an event of failure/media instance recovery if the cancellation has disappeared.

  The cancellation must be filed in support of the coherence of reading. For example, if you:

  (a) charge a TWG of temporary table with data

  (b) open cursor_1 SELECT * from TWG

  (c) update the data of TWG

  (d) open cursor_2 SELECT * from TWG

  (e) delete most of the data of TWG

  (f) open cursor_3 SELECT * from TWG

  Each of these sliders should see a different result set - we have not recovered from them, has just opened their. cursor_1 must push the blocks changed to point in time (b). This requires CANCELLATION. Thus, the cancellation must be generated - and undo is always protected by the roll forward.

  Changed blocks to the TWG, as for ANY table could be physically written to disk until the transaction is completed. It is not always room in the cache buffers for ALL data that has changed.

  And, as Tom above, each of the sliders really sees the data at a point different 'read-consistent. If some of these extractions of cursor will require reading the UNDO data for "compatible" data for this particular slider.

  The point in time' is established when a cursor is open - no data has yet been read yet.

  See the section 'Multiversion Concurrency Control' of the doc

  https://docs.Oracle.com/CD/B28359_01/server.111/b28318/consist.htm#i17881

  Multiversion Concurrency Control

  Database Oracle automatically provides the reading consistency to a query so that all the data that sees the request comes from a single point in time (at the level of instruction read consistency). Oracle database can also provide read consistency to all queries in a transaction (consistency of reading at the level of transactions).

  Oracle database uses information stored in its rollback segments to provide these consistent views. Rollback segments contain old data values that have been changed by validated or recently committed transactions. Figure 13-1 shows how the Oracle database provides consistent reading using rollback segments data at the level of instruction.

  That reference above 'consistent read to a query' also applies when cursors are opened.

• What to fill in 'field of the temporary table' for global temporary tables?

  Hello

  I use the Data Modeler 4.0.1.836 and everything that I put in the box 'the scope of the table temp' for a global temporary table doesn't seem to affect the DDL script about the ON COMMIT PRESERVE/DELETE the LINES option. The script poster ON COMMIT PRESERVE ROWS always anything.

  Yet, some of my temporary tables must be created as ON COMMIT DELETE ROWS.

  Using the Data Modeler wrote about it:

  Scope of the temporary Table:

  For a class as a temporary table, you can specify a scope, such as the Dimension or the Session.

  Not sure what 'Dimension' has to do with the scope here, but it makes no difference.

  I tried to put 'Session', 'Dimension', 'Operation', but no luck. So what is the text for the script generate ON COMMIT DELETE ROWS?

  Thank you

  Hello

  The temporary Scope of Table property (on page Types of Classification of the table properties dialog box) is purely documentary.

  To set ON COMMIT DELETE ROWS you must expand the browser for the relational model and find the node for the relevant Oracle physical model.  If you develop it you will find an entry there for your Table. Double-click on that to get the physical model properties dialog box for your table, and you will find a "Temporary" facility that has options (Preserve Rows), YES (Delete Rows) YES or no.

  David

• Create temporary table in the procedure

  I have a procedure which can be called at any time by multiple users. So I cann't use table in there, because on each call, the table is truncated and inserted. How can I create a temporary table in the procedure?

  Temporary tables in Oracle are different from other RDBMS like SQL Server.

  In Oracle, you create a global temporary table ONCE as part of the design of your database.

  create a global temporary table MyTableName (... columns...) on commit preserve rows;

  You can then use this table in your code as you would any other table.

  The difference is that any data that you insert in this table are only available/visible so that the code runs in the session, and if delete you / truncate the table it only removes the data for this session.  In this way, several sessions we can table without interfering with each other.

  (Note: instead of "preserve" you can change this to "delete" If you want that deleted data automatically when a commit is issued in your session, otherwise the data will be automatically deleted at the end of the session)

• Global temporary tables

  Hi, db 10g,

  I created a global temporary table with this statement:

  create a table temporary global items (item_id);

  and tried to insert inside of Toad, and I got the message

  1 row inserted,

  but when I asked it, I got

  no selected line?

  I tried the script several times, and the result is the same?

  Thank you

  Hello

  Hi Salem wrote:

  It worked, I added this clause

  ON COMMIT PRESERVE ROWS;

  to create it, statement and it worked correctly, but are not this clause the default?

  No, the default is ON COMMIT DELETE ROWS.  I don't know why; ON COMMIT PRESERVE ROWS seems to be much more widely used.