Index organized Tables

Similar Questions

• Delete Performance index organized Tables

  Hello
  
  We are experiencing some performance problems with one of our tables.
  
  We have a table (test), which contains 9 columns:
  
  A number (10) not null not pk,.
  B number (10),
  C number (10),
  D number (10),
  E number (10),
  F varchar2 (30),
  F varchar2 (2),
  G varchar2 (2),
  H varchar2 (250).
  
  The table test is an ITO (Index Organized Table) in configuration of default ITO.
  All columns are often necessary for we can not all overflows.
  
  The table has currently 8 m records, which is roughly 1/2 years of a data value, so insignificant.
  Inserts and updates are fine, but it takes 40 + seconds to delete a single line!
  
  (remove test where a = 3043 ;))
  
  If I convert this table in a standard table, deletes are only 0.5 of a second?
  
  No idea why the delete statement takes an excessively long time on the IOT, or what I could do wrong?
  
  Thank you
  Victoria
  
  Oracle Enterprise version 10.2.0.1.0
  Oracle XE version 10.2.0.1.0

  It seems as if the PK on this table of ITO is referenced by a FK on a child table (big enough) but the FK does not have an associated index.

  Deleting a line in this table, Oracle is required to perform a FTS on the child table to make sure that there is no matching FK.

  Find out if you have indeed a FK that refers to this table, and if CF is indexed.

  Just a guess, of course. A long track during the delete operation should be noted where Pio come just to be sure.

  See you soon

  Richard Foote
  http://richardfoote.WordPress.com/

• Partitioning or an index organized table. Suggestion required.

  Hi gurus,

  We decided to perfomance increase in customer table that has more than 100 million records

  {code}

  customer_id number,

  cust_name varchar,

  Date of Applied_date,

  City varchar (100)

  {code}

  This is the structure of the customer table.

  We decided to composite partition the table based on date (range) applied and customer_id (hash).

  I am confused to go with table index (where tables and indexes are stored together) for better performance.

  Please suggest what we I'm going?  for best performance.

  Please answer

  Supersen

  If the query predicate (WHERE clause) include the Partition key column, Oracle can make the size of Partition - that is to say identify the target Partition.  Otherwise, he would have to do a full Table Scan because he doesn't know what Partition the target Row (s) is in.

  For example, if you are partitioning by APPLIED_DATE but your request is on the table by CITY, Oracle cannot identify the target Partition and do a Scan of Table full - even if you subpartition by CUSTOMER_ID and integrate CUSTOMER_ID in your query, Oracle cannot identify the Subpartition because it cannot identify the Partition.

  Hemant K Collette

• Why slow DML in Index organized tables

  I learned that ITO system was not suitable for tables that have a high volume of DML operations.
  
  I want to know that:
  
  1.) why DML operations are slow when we have data and indexes in the same place for ITO?
  2.) why we take extra precautions for fragmentation to ITO that pile of paintings organized?

  It's as long as your application does not change for the PK values that inspire you the IOT.

  If you have an application that actually modifies the values of primary key - Ouch!

  Here's how to think this through:
  Think of an Index on a column usually.
  What happens when you update the value of this column for a line or set of lines?
  The update to the line goes into the table block (and if the line does not expand or PCTFREE is adequate, there is no chaining line)
  However, the update of the index entry is not just an update. Because an Index is a Structure y (unlike a heap table), in order to change the value of an Index key (even when not unique), you have to 'remove' of the 'location' (IE block) he currently resides to and "insert" in the new "place" (block) corresponding to the new value. So, for example, if change 'Aman' (probably at the head of the Index tree) to "Hemant" (somewhere in the middle), you will find that "Hemant" belongs to another block - so that the index of "Aman" entry should be removed and a new entry for "Hemant" (pointing to the same ROWID) inserted in the correct index leaf block where 'Hemant' belongs.

  Now, instead of an Index on a single column, think an whole table-ITO is an ordered structure. If you change the value of the key to the order (ie the Index key) then the line should be moved to the correct location that he must belong.

  As it is, it is very bad design to change the values for the PK building. an IOT in such a severely design adds to the problem. Now, instead of simply delete and insert for the column values, the entire row should be deleted and inserted.

  However, if you do not change the values of the PK, then you should not have problems with updates. However, if the size of the line is large (or increases with updates), you will need to handle the overflow.

  Hemant K Collette
  http://hemantoracledba.blogspot.com

• How to index a table on multiple sites?

  Hello

  How to index a table on multiple sites?

  I searched this issue and was not able to find the answer. I understand that it can be done with loops, but I don't know how.

  I use the detector of crete vi for frequency domain data collected a VNA (s2p) file. The products contain a table of amplitudes and a table of locations. The problem is that the locations refer to the index of table of amplitude, which is not the same as the frequency. My idea is that I can use this output of the places table to index the frequency to the detected peak frequencies table and then draw these, as well as some analysis data and manipulation on them. Currently, I can do this only by consulting table on the front panel.

  The entrance to the peak detector is currently a table 1 d of the scale (what is the problem?).

  I also looked at the supply frequency & estimate VI, but this VI seems only exit of scalar data for the largest peak, not exactly what I'm looking for.

  Thanks for your help.

  You have a second table for the tested frequency?  If so, then you are right that you just need to index this table with the indexes by the Ridge detector.  Use a loop for.  Automatic index to the index, use index in array to get the value of the frequency and autoindex on frequencies.

  

• What is the physical meaning of automatic indexing of table entry...

  What is the physical interpretation of the automatic indexing. ?

  You wire up a table on the edge of a loop, it sequentially will index the table for you as he travels the loops. A While loop will also do this, but it is much more common on loops For, therefore, loops For making automatically while the While loops must be 'right click' and said to the index in the array. Get it?

• sort of an index by table

  Hi all

  I have a button on a form to run reports,

  There is a tabular block that has names of patients and a check box,

  When a user check more than one box, baptisms of report,

  When you close the first report, the second runs and so on.

  the problem is that there is another element that maintains a number when you check in a patient,

  If you check a patient, then the element holder is (1).

  you check the second element holds (2),

  but you can check the second record so that the point spacers (1), then check the first records in the block, so the first record holds (2),

  When you click the button to run the reports,

  (2) will be held the first (1), and that's what I don't want to happen, I want to sort them.

  check who is the owner of one (1) works first, and who owns the tracks (2) second and so on.

  so

  I wrote this code in the button which runs reports, but is not what I want, it runs reports according to records not the numbers.

  declare
  V_PARM  PARAMLIST ;
       LST_REC NUMBER ;
      REQUEST_NUM NUMBER:=1;
     TYPE V_RECORD IS RECORD (V_VISIT_ID MR_PATIENT_VISITS.VISIT_ID%TYPE                         
     ,V_ORG_NO RC_PATIENT_EPISODES .ORGANIZATION_NO%TYPE
     ,V_NUM NUMBER);
    
     TYPE PRD_TYPE  IS TABLE OF  V_RECORD INDEX BY BINARY_INTEGER;
     PRD_TABLE PRD_TYPE;
  BEGIN
      GO_ITEM('ALL_ADMITTED_PATIENT.PATIENT_FILE_NO') ;
      FIRST_RECORD ;
      LOOP
          IF :ALL_ADMITTED_PATIENT.CHECK_PAT = 'Y'
              THEN
             
              PRD_TABLE(:ALL_ADMITTED_PATIENT.NUM).V_VISIT_ID  := :ALL_ADMITTED_PATIENT.VISIT_ID;
  
               PRD_TABLE(:ALL_ADMITTED_PATIENT.NUM).V_ORG_NO := :ALL_ADMITTED_PATIENT.ORGANIZATION_NO;
  
               PRD_TABLE(:ALL_ADMITTED_PATIENT.NUM).V_NUM  := :ALL_ADMITTED_PATIENT.NUM;
              
              
    V_PARM := GET_PARAMETER_LIST('REPDATA');
    IF NOT ID_NULL(V_PARM) THEN
        DESTROY_PARAMETER_LIST(V_PARM);
    END IF;
    V_PARM := CREATE_PARAMETER_LIST('REPDATA'); 
    Add_Parameter(v_parm,'P_VISIT_ID'          ,TEXT_PARAMETER,    PRD_TABLE(:ALL_ADMITTED_PATIENT.NUM).V_VISIT_ID);
    Add_Parameter(v_parm,'P_ORGANIZATION_NO'   ,TEXT_PARAMETER,PRD_TABLE(:ALL_ADMITTED_PATIENT.NUM).V_ORG_NO);
    
    REQUEST_NUM := REQUEST_NUM +1;
    
    RUN_REPORT('MRSHTVIW',TO_NUMBER('1'),V_PARM ,'OCX_BLOCK.OCX'); 
    EXIT WHEN :SYSTEM.LAST_RECORD = 'TRUE' ;
    NEXT_RECORD ;
    ELSE
        EXIT WHEN :SYSTEM.LAST_RECORD = 'TRUE' ;
        NEXT_RECORD ;
        END IF ;
          END LOOP ;
      
  
  END;
  
  
  
    
     -------------------
  
  
  
  
  

  I want to sort the 'index by table' once he gets the data in it?

  or any other solution

  Many thanks to you all,.

  Thank God I solved it, it comes to the latest version of my code that solved the problem:

  
   DECLARE
       V_PARM PARAMLIST ; 
  
       TYPE ADT_REC_TYPE IS RECORD (V_VISIT_ID VARCHAR2(90) ,
       V_ORG_NO VARCHAR2(90)
       ) ;
       ADT_REC ADT_REC_TYPE ;
       TYPE ADT_TAB_TYPE IS TABLE OF ADT_REC_TYPE
       INDEX BY BINARY_INTEGER  ;
       ADT_TAB ADT_TAB_TYPE ;
   BEGIN
        GO_BLOCK('ALL_ADMITTED_PATIENT') ;
        FIRST_RECORD;
        LOOP
        IF :ALL_ADMITTED_PATIENT.CHECK_PAT = 'Y'
              THEN
          ADT_TAB(:ALL_ADMITTED_PATIENT.NUM).V_VISIT_ID := :ALL_ADMITTED_PATIENT.VISIT_ID     ;
          ADT_TAB(:ALL_ADMITTED_PATIENT.NUM).V_ORG_NO   := :ALL_ADMITTED_PATIENT.ORGANIZATION_NO ; 
  
   END IF ; 
  
        EXIT WHEN :SYSTEM.LAST_RECORD = 'TRUE' ;
         NEXT_RECORD ;      
  
        END LOOP ; 
  
        FOR I IN ADT_TAB.FIRST .. ADT_TAB.LAST LOOP 
  
        V_PARM := GET_PARAMETER_LIST('REPDATA');
    IF NOT ID_NULL(V_PARM) THEN
        DESTROY_PARAMETER_LIST(V_PARM);
    END IF;
    V_PARM := CREATE_PARAMETER_LIST('REPDATA');  
  
    Add_Parameter(v_parm,'P_VISIT_ID'          ,TEXT_PARAMETER,    ADT_TAB(I).V_VISIT_ID);
    Add_Parameter(v_parm,'P_ORGANIZATION_NO'   ,TEXT_PARAMETER,ADT_TAB(I).V_ORG_NO);
    RUN_REPORT('MRSHTVIW',TO_NUMBER(:GLOBAL.LANGUAGE_ID),V_PARM ,'OCX_BLOCK.OCX');
  END LOOP ;
       END ; 
  

• Recovery of the records by using the Ref Cursor or indexes per Table (which is better)

  Hi all
  
  I am interested to know if there is a performance (or other) advantages to return a result set from an Oracle stored procedure for a client application (for example, in Java) by using a Ref Cursor or Index by Table, respectively. Most of the people I met who know Java seem to use a Ref Cursor but did not say why this method is preferable. I'm not too familiar with Java and do not have the opportunity to test the difference between either method, but I am very interested in the other user forum about this view, gauging
  
  Kind regards
  
  Kevin.

  KevinFitz wrote:
  Hi zerathul,

  Thanks for the quick and helpful response. A REF CURSOR would be the best solution if the same set of results (content and number of records returned) should be dealt with by the application of the 'customer '. I'm guessing that maybe in this situation 'theoretical' that there might be less network traffic to return the set of results through an associative array,

  Kind regards

  Kevin.

  Yes, it would always be the best solution, because an associative array would mean collecting all the data in memory of expensive PGA on the database server before they pass any return on the network, while a fair Ref cursor is to feed the data over the network (maybe a little extra load, but you were unlikely to notice). Also the client application would treat a ref as of rows returned cursor data recovery and could treat them upon their arrival, an associative array is a collection of data which will then be entirely spent before any treatment could be done and then the treatment should go through the entire table to do.

  REF CURSOR will also provide other information such as the error codes etc regarding SQL if necessary. If you get an error when filling a table on the side of the database, it is not so easy to recover this error to the client.

  REF CURSOR is designed for this purpose. Use them.

• Query on the organized Table (IOT) Index sorts unnecessarily data

  I created hist3 to the table as follows:
  
  create table hist3)
  reference date,
  palette varchar2 (6).
  Artikel varchar2 (10),
  Menge number (10),
  status varchar2 (4).
  VARCHAR2 (20) text.
  VARCHAR2 (40) data.
  primary key constraint hist3_pk (reference, palette, artikel)
  )
  index of the Organization;
  
  The table being an IOT, I expect that the retrieval of rows in the same order as in the primary key must be very fast.
  
  This is true for the following query:
  
  SQL > select * from hist3 by reference;
  
  -----------------------------------------------------------------------------
  | ID | Operation | Name | Lines | Bytes | Cost (% CPU). Time |
  -----------------------------------------------------------------------------
  | 0 | SELECT STATEMENT | 1000K | 82 M | 3432 (1) | 00:00:42 |
  | 1. INDEX SCAN FULL | HIST3_PK | 1000K | 82 M | 3432 (1) | 00:00:42 |
  -----------------------------------------------------------------------------
  
  But if I add the following column of the primary key as a criterion of the order, the query becomes very slow.
  SQL > select * from hist3 by reference, palette;
  
  ------------------------------------------------------------------------------------------
  | ID | Operation | Name | Lines | Bytes | TempSpc | Cost (% CPU). Time |
  ------------------------------------------------------------------------------------------
  | 0 | SELECT STATEMENT | 1000K | 82 M | 22523 (1) | 00:04:31 |
  | 1. SORT ORDER BY | 1000K | 82 M | 200 M | 22523 (1) | 00:04:31 |
  | 2. FULL RESTRICTED INDEX SCAN FAST | HIST3_PK | 1000K | 82 M | 2524 (2) | 00:00:31 |
  ------------------------------------------------------------------------------------------
  
  If I look at the execution plan, I don't understand why a SORT statement should be needed, as data already take the IOT in the order requested.
  
  Any thoughts?
  Thomas

  There are various ways how Oracle sorts VARCHARs.
  When you create an index on a VARCHAR column, sort order is binary.
  Try ' alter session set nls_sort = "BINARY" "and run your query."

• At all indexes on tables of the same value in the structure of the event

  Hello

  I have a panel with the four bays and I use a structure of the event.

  Now, I want that change of the index of array_1 also affects the index of 3 other tables at the same index.

  But there is only a property "value Exchange" and no property 'index-change' in the properties of the table.

  So I read the 'index' property and write in the other table.

  But: It seems as if I have to do so within the period of waiting-section of the structure of the event.

  Is there another way to do this?

  Thanks for help

  You can use the mouse event on each table to detec the event (of course, that will attract not only a change of index, but I don't think you care too) and then use the 'values of the indices' property on all the table to set.

  See annex VI (LV2012), hope this helps

• For indexing loop (tables)

  Hello and thanks for reading.

  I have a problem that requires me to do a lot of manipulations with the berries, and I am doing this in a series of nested for loops. I'll cut straight to my question.

  I initialize an array 0 in several user-defined columns. I run a loop for the number of times user, generating a random value to each iteration defined. If I activate the automatic indexing, I use the subset of table replace outside the loop and it works very well.

  Here's my problem. If I turn off the automatic indexing, and son of the [i] block to the index on the subset of table replace, now all of a sudden all I get is a random value, and it is always in the last slot in the table.

  I was pulling my hair out on this problem. I looked at the forums, I looked at the example problems, I don't know WHY it does this, but I have TO be able to use the loop counter to replace the elements in the array. I'll lay 3 loops, and I'm not quite (familiar) uncomfortable with the way the auto-indexation feature chooses value auto-index to be able to think through the problem.

  I wrote the program in C in my head in about 10 minutes, but this automatic indexing thing is KILLING me and I have no idea how import C in LabView without writing a dll, which I don't know how do either.

  Please let me know how I can get the loop For to browse a table without using automatic indexing. Yet once again, I have no idea why he is just posting a value in the last slot of the table.

  Thanks a lot for all the replies.

  I know what it is.  I have no LV 2010 here at installed work, so I have to rely on my memory and see the code.

  You use replace table subset.  With lit autoindexing, you create a table 1 d of random numbers which is be the same length as your table due to the terminal N being associated with the length of the array.  If you end up replacing the dimension table 1 d in its entirety in a single shot with the new data starting with element 0.  (For smile, associate a smaller number to Terminal N and you will see that some of your table 1 d is replaced).

  The way I showed you replace 1 data at a time, and the first iteration is item 0, the element following 1...

• Impossible to index a table of images images!

  Hi all

  I encountered this problem lately. I am indexing a number of images in a table using a loop for. Then the array of images (16 bits) is used somewhere else in the program. It is indexed and the images are processed and displayed. The problem is; When you try to index the images of the sets using the table to index the result is the same regardless of the index!

  Can someone explain that to me?

  Thanks in advance

  When you used the IMAQ create VI you specified each image to use the same name of 'image '.  Each image must have a unique name.  I edited your VI to give a unique name for each image and I could see three different images to three different display components.

  

• How to use a vector of Boolean indexing a table

  I have a table A = [1 2 3 4 5 6 7 8 9 10].

  I also have an array of Boolean B = [1 1 0 0 0 0 0 0 0 1].

  I want to use the table of Boolean B spot the items, create a new matrix C = [1-2-10]. In MATLAB, I would just type C = a.b.

  I'm scratching my head trying to figure how to do this. A solution would be to go through a loop for, query b.i and remove a (i) If b = 1. But that would change the size of A, while the second time I did it, my rating would be a mistake.

  Anyone know of a way to do it?

  BONUS: If I have an AA 2D, with multiple columns, it would be nice to use B to select several columns of AA (in MATLAB, it would be CC = AA(:,B).

  This can be done with automatic indexing with conditional tunnels.  The same approach could easily be applied to a 2D array, thus:

  

• Mathscript I can only index a table with an actual integer not a reference to another table

  Hello

  Basically, I'm trying to write a function in Mathscript that works well in Matlab.

  I did a FFT of a signal that I used VI Ridge detector to find the main summits

  To find the signal of phase I want to refer to the location of the peaks in the phase table

  That is to say

  Phase (rental (1))

  Simply, I get the error-90026. Motorization of matrices the same indices of size must be whole

  Is this a bug

  Hello

  What version of LabVIEW are you using?  Are you maybe get two error codes?  Error-90026 is simply the indexes should be real and positive integers.  If you also get an error on the size of the matrices being incompatible, try your code in the MathScript window.  What is
  Rental (1)
  back?  A scalar value?  Or a table?

  What is the left side of this expression?  In other words, you assign the result to a variable or a submatrix?
  A = Phase (rental (1));
  or
  A (c:d) = Phase (rental (1));

  What is output when you type
  Rental (1)

  It is an integer value greater than 0?  Or is it a double number?  If you calculate the table of location in a certain way, it may be because the data error, you end up exactly a whole number.  Indexing routines will complain about this.  You can truncate to integer with the function of int32.  Try these suggestions.  If you still have problems, post more of your code so we can reproduce the problem that you see.

  Grant M.
  Staff software engineer | LabVIEW Math & Signal Processing | National Instruments

• Implementation of associative array (indexes per Table) in the procedure

  Hi guys,.

  I'm trying to implement collections in the procedure. I am trying to store integer values as well as the names & to print the same list of names. Here is my procedure

  create or replace procedure (coll_proc)

  )

  is

  pay type is table of the index number to varchar2 (20);

  salary_list salary;

  L_Name varchar2 (2000);

  Start

  salary_list ('Aude'): = 62000.

  salary_list ("Mohammed"): = 50000;

  ("Julian") salary_list: = 45000;

  L_Name: = salary_list.first;

  l_name is not null loop

  dbms_output.put_line (' the wages of ' |) L_Name | « est » ||' ='|| TO_CHAR (salary_list (L_Name)));

  L_Name: = salary_list. Next (L_Name);

  end loop;

  end;

  Below is the error

  "Error (2.1): PLS-00103: encountered the symbol") "when expecting one of the following numbers: Remove current exists prior" "

  You people could please check this & tell me that where I'm going wrong.

  Hello

  It seems that you have all the parameters in your stored procedure, so remove the "()" after the name of the procedure.

  create or replace procedure coll_proc
  is
    type salary is table of number index by varchar2(20);
    salary_list salary;
    l_name varchar2(2000);
  begin
    salary_list('Rajnish'):=62000;
    salary_list('Minakshi'):=50000;
    salary_list('Seetha'):=45000;
  
    l_name:= salary_list.first;
    while l_name is not null loop
      dbms_output.put_line('Salary of ' ||l_name|| 'is'||'='|| to_char(salary_list(l_name)));
      l_name:=salary_list.next(l_name);
    end loop;
    end;
  

  I tried this and able to create the procedure

  Procedure created.
  

  Kind regards

  Jitendra