logic of backend on simultaneous execution of sql

Similar Questions

• Feature of the parallel execution of SQL query

  Hello guys,.

  I installed a 11 GR 2 Oracle RAC (11.2.0.3) database, but I see the use of the feature of running parallel SQL queries, but I never used that.

  I would like to know if this feature is enabled by default on CCR environments and if it does not require me to pay for Enterprise Edition.

  NAME DETECTED_USAGES FIRST_USA LAST_USAG CURRE

  ---------------------------------------------------------------- --------------- ----- --------- ---------

  Checking Options 1 TRUE 9 October 15 October 9, 15

  BMG Auto setting 1 TRUE 9 October 15 October 9, 15

  Memory of the execution of SQL auto 1 TRUE 9 October 15 October 9, 15

  Automatic management of the space Segment (System) 1 TRUE 9 October 15 October 9, 15

  Automatic Storage Management 1 TRUE 9 October 15 October 9, 15

  Management of the Undo Automatic 1 TRUE 9 October 15 October 9, 15

  Character set 1 TRUE 9 October 15 October 9, 15

  Deferred Segment creation 1 TRUE 9 October 15 October 9, 15

  Locally managed tablespaces (System) 1 TRUE 9 October 15 October 9, 15

  Locally managed tablespaces (user) 1 TRUE 9 October 15 October 9, 15

  Logfile multiplexing 1 TRUE 9 October 15 October 9, 15

  Oracle Java Virtual Machine (System) 1 TRUE 9 October 15 October 9, 15

  Oracle utility of metadata API 1 TRUE 9 October 15 October 9, 15

  1 SQL query in parallel TRUE 9 October 15 October 9, 15

  Partitioning (System) 1 TRUE 9 October 15 October 9, 15

  Real Application Clusters (RAC) 1 TRUE 9 October 15 October 9, 15

  Recovery zone 1 TRUE 9 October 15 October 9, 15

  SECUREFICHIERS (System) 1 TRUE 9 October 15 October 9, 15

  SECUREFICHIERS (user) 1 TRUE 9 October 15 October 9, 15

  The parameter server file 1 TRUE 9 October 15 October 9, 15

  Thanks in advance,

  Franky

  You are not, but Oracle is, since you are using RAC.  Oracle relies on execution in parallel against the gv$ views so even if you can't use it in SE way common Oracle can when it comes to query against one of the points of view gv$.  That's why DBA_FEATURE_USAGE_STATISTICS reports that you see.

  David Fitzjarrell

• is their any option to make its contribution to the time of execution in SQL

  is their any option to make its contribution to the time of execution in SQL instead of &

  Waran wrote:
  When to use & symbol to make his contribution in SQL queries. is their another way to provide the same.

  Yes, you can use a whole set to use any other symbol you like.

  SQL> select '&input' from dual;
  Enter value for input: Test1
  old   1: select '&input' from dual
  new   1: select 'Test1' from dual
  
  'TEST
  -----
  Test1
  
  SQL> set define "#"
  SQL> select '#input' from dual;
  Enter value for input: Test2
  old   1: select '#input' from dual
  new   1: select 'Test2' from dual
  
  'TEST
  -----
  Test2
  

  If this is not what you mean, please explain what you do and where you need to run SQL and the version of the database, like everyone else, it's important.

• Time of execution of SQL statements

  Is there a way to see the time of the last sql instructions? (as the TOAD request viewer)

  Without having to execute the statement as a script and use "set timing on."

  Kind regards

  Carsten

  We show the run down by the exit time

  

  You can also see the query execution times in the historical Panel SQL

• logic to be transformed into a table sql pl statement and select fill.

  create table emp (eno number, varchar2 (20) ename, sal number (10.2), dno number);
  
  create table emp_commision (eno number number dno, dname varchar2 (20), number (5.2)) of the commission.
  
  DECLARE
  TYPE EmpTabTyp1 IS TABLE OF THE emp % ROWTYPE directory INDEX;
  TYPE IS of EmpTabTyp2 TABLE emp_commision % ROWTYPE directory INDEX;
  emp_tab1 EmpTabTyp1;
  emp_tab2 EmpTabTyp2;
  
  C1 (p_dno number) cursor select eno, dno, dname, commission of emp_commision where dno = p_dno;
  number of l_num_index1;
  
  Start
  Select eno, ename, sal bulk collect into emp_tab1 from emp;
  I'm in emp_tab1.first... emp_tab1. Last
  loop
  If (emp_tab1 (i) .sal > 10000) then
  for l_rec_commision in c1 (emp_tab1.dno)
  loop
  
  l_num_index1: = (l_num_index1 + 1);
  emp_tab2 (l_num_index1) .commission: = l_rec_commision.commision;
  
  end loop;
  
  end if;
  end loop;
  while others then
  dbms_output.put_line (SQLERRM);
  end;
  /
  
  
  Requirement:
  
  For the same logic, I want to fill the table with the commission plsql emp_tab2, without using a cursor
  and two loops (loop) and the cursor for loop for. Sal > 10000 expected
  also be implemented.
  
  Others can be done in a single query.
  
  Thank you
  Vinodh

  ora_1978 wrote:
  Requirement:

  For the same logic, I want to fill the table with the commission plsql emp_tab2, without using a cursor
  and two loops (loop) and the cursor for loop for. Sal > 10000 expected
  also be implemented.

  Others can be done in a single query.

  Thank you
  Vinodh

  In addition there are errors in your code and it won't work, it is unclear what exactly you want as you have not explained with sample data and expected results.

  You select the number of columns to collect your in bulk.
  You collect the commission for an entire Department without regard to the employee for each employee record, so you would end up duplicating your data in your pl/sql collection (don't call them paintings, they are not really tables).
  You have not initialized l_num_index1 so it will never be incremented
  You have added an unnecessary error handler.
  etc.

  I'm guessing that you are looking for something in this direction...

  declare
    type EmpTabType2 is table of emp_commision%ROWTYPE index by binary_integer;
    emp_tab2 EmpTabType2;
  begin
    select ec.*
    bulk collect into emp_tab2
    from   emp e
           join emp_commision ec on (e.eno = ec.eno and e.dno = ec.dno)
    where  e.sal > 10000;
  end;
  

  ... but we can't really help without more information.

• AWR: Executions = 0 (SQL sorted by elapsed time)

  Hello!
  
  In the section Statistics SQL - SQL sorted by time elapsed from my AWR report
  I see statements with executions = 0, but time elapsed (s) is in the top 5.
  How can it be?
  Is - this operation, which goes more like snapshot interval?
  Please explain
  
  Kind regards
  Pavel

  Hi Pavel,

  This could mean that the statement has not completed at the time of the snapshot from the end.

  Best regards
  Nikolai

• The format of a modifiable from the execution of SQL time SQL statement...

  The format of a change of the duration of execution of a SQL statement SQL statement?
  
  Thanks in advance

  Hello

  If you send two even SQL query with different format then everyone will make the analysis difficult. The execution path may still remain.

  Concerning

• Execution of SQL in 2 cases

  I am confused regarding the performance of the Sub SQL in 2 cases
  
  In order to obtain the total no.. of the more intimate select timeline.
  
  Once I use the function "COUNT (*) NTC ().
  
  SELECT b.lastname,
  b.FirstName,
  b.Department,
  b.org_relationship,
  b.enterprise_name,
  b.CNT
  DE)
  SELECT a.*,
  rownum rn
  DE)
  SELECT P.LastName,
  p.FirstName,
  pORG. DEPARTMENT,
  pORG.org_relationship,
  pORG.enterprise_name,
  
  COUNTY () MORE (NTC) - & gt; the function "COUNT (*) (cnt)."
  
  T_person p,
  t_contact c1,
  porg t_o_person
  WHERE p.person_id = c1.ref_id (+)
  AND p.person_id = porg.o_person_id
  ORDER BY upper (p.lastname), upper (p.firstname)
  ) a
  WHERE rownum & lt; = & lt; & lt; Max asked line & gt; & gt;
  ) b
  WHERE rn & gt; & lt; & lt; min line requested & gt; & gt;
  
  ****************************************************
  *************************************************
  Then, I use a QUERY SELECT INTERNAL to get the total.
  
  SELECT b.lastname,
  b.FirstName,
  b.Department,
  b.org_relationship,
  b.enterprise_name,
  b.CNT
  DE)
  SELECT a.*,
  rownum rn
  DE)
  SELECT P.LastName,
  p.FirstName,
  pORG. DEPARTMENT,
  pORG.org_relationship,
  pORG.enterprise_name,
  
  * (SELECT count (*)-& gt;) QUERY SELECT INTERNAL for a total count.*
  FROM t_person p,
  t_contact c1,
  porg t_o_person
  WHERE p.person_id = c1.ref_id (+)
  AND p.person_id = porg.o_person_id
  ORDER BY upper (p.lastname), upper (p.firstname)
  
  *) did NTC *.
  T_person p,
  t_contact c1,
  porg t_o_person
  WHERE p.person_id = c1.ref_id (+)
  AND p.person_id = porg.o_person_id
  ORDER BY upper (p.lastname), upper (p.firstname)
  ) a
  WHERE rownum & lt; = & lt; & lt; Max asked line & gt; & gt;
  ) b
  WHERE rn & gt; & lt; & lt; min line requested & gt; & gt;
  
  So, wanted to know which option would be most effective in this case? What the SELECT INTERNAL SEPARATE to get the COUNT or by using the COUNT () at the NTC ()? *
  
  Published by: [email protected] on March 10, 2009 12:41

  user_7000011 wrote:
  Thanks for the inputs. I followed the steps in the link and have gathered some information on the SQLs.However, since I'm new to these topics-i couldnot get
  details in its entirety.

  I've pasted below, data

  As shown in the links provided, could you please add that outputs the "Predicate information" section to your PLAN to EXPLAIN next time? It directly follows the exit PLAN and is essential information.

  How exactly you generate execution plans? I do not see the optimizer to understand your Top N query, so it does not switch to FIRST_ROWS_n mode. So what have you used for this part of your query execution PLAN of EXPLAIN?

  WHERE rownum <= <>
  ) b
  WHERE rn > <>
  

  The only difference between the execution of the posted plans that I can spot is that we add a cost for an ORDER BY operation while the other shows only the analytic SORT of WINDOW operation free of charge. I don't know why the ORDER BY operation is absent from the first, probably since the ORDER was already held by the SORT of WINDOW operation (or the declaration was not the same).

  The links provided show you step by step instructions, including the information requested by Justin, and much more, for example the scope SQL trace of your statements and in 10 g DBMS_XPLAN scope. Output DISPLAY_CURSOR which is also very useful.

  You must simply use the snippets provided in the links and put them in your statement, so if you have trouble following the instructions there that I would be interested to know what was the problem, so that I can improve it.

  Kind regards
  Randolf

  Oracle related blog stuff:
  http://Oracle-Randolf.blogspot.com/

  SQLTools ++ for Oracle (Open source Oracle GUI for Windows):
  http://www.sqltools-plusplus.org:7676 /.
  http://sourceforge.NET/projects/SQLT-pp/

• NEITHER Veristand DLL models simultaneous execution

  Hi all,

  I have to solve that problem is with my VeriStand workspace:

  I have a project NIVS with two models of dll (Run/Stop/Pause) execution is monitored in the Versistand workspace by two interface objects user 'Model Control'.

  I wonder if it is possible to manage the executions without a click twice, i.e. together with a click of mouse control.

  I tried to create a custom user interface object whose controls could / should manage all other objects dll controls in the workspace user interface. then I modified 'Model - model Control.vi' with the addition of a "Call by reference" block to call my user object interface custom controls; but an error occurs when trying to load the object in the workspace. The same problem using a Subvi rather than a reference call.

  I hope to be clear.

  You have a solution to this problem?

  Thank you

  Giulio

  Hi, Giulio.

  the fastest way to set values of multiple channels (aka "destinations") with a single source channel is the way user combination and maps. It is:

  (-) In the system Explorer, create a user called channel model batch start.

  (-) Press the button mappings on top and connect the channel the user to both channels of the execution of model, one for each model.

  Bind a control of the workspace to the user of the chain)

  

  In this way, you can change the execution mode of several models with a single channel model (and thus a mouse click). You can use a Boolean control if you just want to start/stop the model or an entire control if you want better control each State of execution, which are:

  0: start
  1: break
  2: reset
  3: save
  4: restore

  An interface object using custom user is honestly an overdose if you just have to set several values at once.

  Hope this helps

  Concerning

  Fabio

• Response time of Structure event & simultaneous execution of events

  Hello. I built a VI using the structure of the event. Whenever I press a button to start the program (for example, I press "w" to the throttle), the indicator does not respond immediately. Is it normal for the structures of the event or can I do? Another problem I have is when I am pressing on a button, I can not press other buttons to work simultaneously (for example, I press "w" to the throttle and yaw "d"). Is there a way I can change this? Please advice.

  Thank you

  Hello

  Watch what you do with these business structures.

  Better, you can use in the range and force.

  Already done this for you well, there's also a better way to come of age this another case structure on the right.

  You had no timeout in the structure of the event, so he'd be stuck in this case.

  As its name suggests doesn't work if the key is down for a little while has added another key case down, repeat.

  I found something strange to the w, a, s, d keys allow you to the stored value but with to the up, down, left, right you set back to 0 after releasing.

  Koen

• Order of execution of SQL statements

  Hello

  I have two SQL statements where the first statement executes on a table with more than 40 million lines, the second statement is running on a table more 6 million lines.  When they are running their own each take about 0.15 seconds to run, but when combined they take 20 minutes to run, (the second SQL statement is inserted in the WHERE clause of the statement of first).  It would seem that after combining these statements, the first statement goes through all 40 million lines before it performs the SELECT in the WHERE clause.  I think that what is necessary is to ensure the SELECT in the WHERE clause is executed first... or something like that!  Anyone has any ideas on how to combine these statements but not suffer from the performance impact?

  The first statement is:

  Select csi.instance_id,

  OEL.ordered_item

  of apps.csi_item_instances csi,.

  Apps.oe_order_lines_all oel

  where csi.instance_id in

  (1718000,3698000,48740202)

  and csi.last_oe_order_line_id = oel.line_id;

  The second statement is:

  Select / * + INDEX (IEA (attribute_id)) * /.

  IEA.instance_id

  apps.csi_iea_values do

  where iea.attribute_id = 10004

  and iea.attribute_value is not null;

  The joint return is:

  Select csi.instance_id,

  OEL.ordered_item

  of apps.csi_item_instances csi,.

  Apps.oe_order_lines_all oel

  where csi.instance_id in

  (select / * + INDEX (IEA (attribute_id)) * /)

  IEA.instance_id

  apps.csi_iea_values do

  where iea.attribute_id = 10004

  and iea.attribute_value is not null)

  and csi.last_oe_order_line_id = oel.line_id;

  Thanks for any help,

  Mike

  Your subquery returns probably just two values that you did originally as constants - but the optimizer thinks that you're going to get 564 K lines.  This is why the indicator for the simple query has a beneficial effect, it forces the Oracle to use an index when it would otherwise make a search.

  When the subquery is incorporated, however, the optimizer uses its cardinality expected to decide whether to use a nested loop join or the hash join to CSI_ITEM_INSTANCES, since the large enough estimate, he uses the hash with a join analysis complete.  That's why I pointed out that the fact to tell the optimizer to how many lines outside the subquery should make a difference.

  Have you tried the "common table expression" approach, rather than approach no_merge, but it would not help because it does not change the optimizer for cardinality estimate.  If you want to repeat the method CTE adding boards / * + materialize cardinality (2) * / to the query in the WITH clause, you should get the desired result.

  Concerning

  Jonathan Lewis

• Execution of SQL queries based on user input in the text box on the page of the APEX

  Hello
  
  I am new to develop in the APEX, and I encountered a problem...
  
  It is even possible to do such a thing: use the text box to enter a SQL query and then run it on my schema and display the results in the report item? And if the answer is Yes, can someone give me advice on how to do this?
  
  Thanks in advance.

  In my example, the text is from a file in a text box. The report source is a function returning the SQL query:

  DECLARE
     v_query   VARCHAR2 (4000);
  BEGIN
  v_query := :p91_sql_query;
        RETURN v_query;
  END;
  

  Denes Kubicek
  -------------------------------------------------------------------
  http://deneskubicek.blogspot.com/
  http://www.Apress.com/9781430235125
  https://Apex.Oracle.com/pls/Apex/f?p=31517:1
  http://www.Amazon.de/Oracle-Apex-XE-Praxis/DP/3826655494
  -------------------------------------------------------------------

• Execution of SQL query error

  Hello
  
  You can see why I get this error message for my SQL query?
  

  WITH SKU_DATA AS (
  SELECT /*+ MATERIALIZE */ DISTINCT FROM_LOC_ID,
             SKU_ID,
             DESCRIPTION,
             UPDATE_QTY,
          ORDER_ID,
          CONSIGNMENT,
             WEIGHT,
          PALLET_ID,
          CASE  
      WHEN Upd_Qty_Ratio < 1 
      THEN TO_CHAR(UPDATE_QTY) || 'U'
      WHEN TRUNC(Upd_Qty_Ratio) = Upd_Qty_Ratio
      THEN TO_CHAR(Upd_Qty_Ratio) || 'C'
      ELSE TO_CHAR(TRUNC(UPDATE_QTY)) || 'C' || ' ' || TO_CHAR(ROUND(MOD(Upd_Qty_Ratio, 1) *  USER_DEF_NUM_3, 6)) || 'U'
      END CU_Sum
      FROM (
    SELECT DISTINCT
           FROM_LOC_ID,
        S.SKU_ID,
           S.DESCRIPTION,
           ITL.UPDATE_QTY,
           S.USER_DEF_NUM_3,
        OH.ORDER_ID,
        ITL.CONSIGNMENT,
        ITL.PALLET_ID,
           NVL(ITL.UPDATE_QTY,0)*NVL(S.EACH_WEIGHT,0) Weight,
           ITL.UPDATE_QTY/(CASE S.USER_DEF_NUM_3 WHEN 0 THEN 1 ELSE S.USER_DEF_NUM_3 END) Upd_Qty_Ratio
      FROM INVENTORY_TRANSACTION ITL, SKU S, LOCATION L, ORDER_HEADER OH
      WHERE ITL.SKU_ID = S.SKU_ID
      AND ITL.CODE = 'Pick'
      AND ITL.CONSIGNMENT = $P{Consignment}
      AND OH.ORDER_DATE = TO_CHAR($P{Date}, 'DD-Mon-YYYY')
      AND OH.ORDER_ID = ITL.REFERENCE_ID
      AND ITL.TO_LOC_ID = 'CONTAINER'))
  SELECT DISTINCT ORDER_ID, CONSIGNMENT, WEIGHT, PALLET_ID, CU_Sum,
  (SELECT NVL(TO_CHAR(SUM(CASE WHEN NULLIF(SUBSTR(Cu_Sum, -1), 'U') IS NULL THEN NULL ELSE REPLACE(Cu_Sum,'C',NULL) END)),'0') ||'C' || ' ' || NVL(TO_CHAR(SUM(CASE WHEN NULLIF(SUBSTR(Cu_Sum, -1), 'C') IS NULL THEN NULL ELSE REPLACE(Cu_Sum,'U',NULL) END)),'0') ||'U' FROM SKU_DATA) AS Total_Cu_Sum
  FROM SKU_DATA

  Thanks in advance.
  
  SM.

  Hello Sam, what is the error, and what has changed since he was executed successfully?

• Execution on SQL condition * MORE

  Hello
  
  I need something like this run on SQL * PLUS.

  SELECT Case
            When username Is Null Then
             @\Sql\Test.Sql
            Else
             Null
         End
    FROM dba_users
   WHERE Username = SCOTT

  It s possible?
  
  Thanks to advanced

  Hello

  Is the problem that you want to run test.sql only if a query returns something?

  SQL * more isn't a very good way to do it.
  Using substitution variables, you can run either test.sql or do_nothing.sql, depeniding on the output of a query. Do_nothing. SQL can contain anything other than a comment.

  COLUMN  script_name_col  NEW_VALUE  script_name
  
  SELECT  CASE
              WHEN EXISTS (
                          SELECT  NULL
                          FROM    dba_users
                          WHERE   username = 'SCOTT'
                          )
              THEN  'test.sql'
              ELSE  'do_noithing.sql'
          END     AS script_name_col
  FROM    dual;
  
  @&script_name
  

• Execution script sql DB automatic opening

  Is it possible to configure a DB so a script given SQL is executed each time the opens the database?
  
  Thank you very much in advance.

  You can create a startup after trigger to run PL/SQL

  Is it ok for you or do you really need to call a script stored on disk?

  http://download.Oracle.com/docs/CD/B28359_01/server.111/b28318/triggers.htm#i6061