DB sequence for the primary key

Similar Questions

• using a sequence as the primary key

  I use a sequence for the primary key of the database for dimensions (following Kimball methodology). In ODI, I define another unique key as principal. It will not let you select check null = true and therefore a sequence can serve as primary. Someone at - it something differently.

  ss396s wrote:
  I use a sequence for the primary key of the database for dimensions (following Kimball methodology). In ODI, I define another unique key as principal. It will not let you select check null = true and therefore a sequence can serve as primary. Someone at - it something differently.

  You must follow the rules on the sequence
  1 > it cannot be run on the source
  2 > may not be a part of your key update
  3 > check not the null check box should not be selected
  4 > separate box must not be activated

  If you use a sequence for the primary key for the database, and then identify another or several columns are coming from the source and use that you can only identify a row. Use these columns as your key to update.

  Thank you
  Fati

• Factor of clustering for the primary key Index

  Hi all
  
  I have cretead a new table with 1.7 million records with an index of primary key on ID (NUMBER)
  Number of blocks used is arnd 57 K.
  
  Factor value of clustering on the primary key index is 1.6 million.
  
  Could you please suggest what can be the reason for such a clustering factor high for the new table.
  
  
  Thank you
  Ash N.

  Google is your friend:
  http://www.dbasupport.com/forums/archive/index.php/t-38893.html
  http://asktom.Oracle.com/pls/asktom/f?p=100:11:0:P11_QUESTION_ID:1032431852141
  http://hemantoracledba.blogspot.com.es/2008/01/impact-of-clustering-factor.html

• Problem by setting the primary key: relaxation Assigned primary key in the sequence.

  I have a table and a trigger for insert/update on the table. Trigger I get the game of the primary key of a sequence. I tested unit by inserting records in the table. It works very well. Kets primary key the next sequence number.
  
  I use this table as an entity in my adf application. The primary key attribute is set to "DBSequence". But when inserted I do not receive the following sequence for the primary key. Instead it is inserting the temporary number - ve that assigns the adf.
  
  I use JDeveloper 11 g.
  
  
  Can someone tell me what could be the problem?

  Your trigger should be something like:

  create or replace TRIGGER "SID_ASSIGN"
   before INSERT
   ON MY_TABLE
   FOR EACH ROW
  
  BEGIN
  
  if :new.SID is null or :new.SID < 0 then
     SELECT MASTER_SID_SEQUENCE.nextval into :new.SID from dual ;
  end if;
  END;
  

  You can refer to the guide of Dev of 11g for more details on this...

  Julian

• How to change the type of source for a primary key on a form?

  Hello
  
  When creating a form, I put the source type for the primary key of an existing sequence.
  
  Now, I want to change the source of a trigger.
  
  Can anyone suggest how do?
  
  Thanks in advance,
  Annie

  Annie:

  Set the trigger and then delete the process of the page named «Get PK»

  CITY

• How to refer to the primary key column of newly inserted rows of tabular form

  Hello

  I use APEX 4.2.0.00.27 with Oracle DB 11.2.0.3.0.

  I work with a tabular presentation wizard-created for insert and update a table using the integrated SRM process (sequence 10).  I'm trying to use a process of anonymous block of PL/SQL (sequence 30) to make another manipulation of table after the records were inserted or updated.  The manual process is associated with my tabular form and I use the variables of name of column binding in my program block.

  My (rsn_test) table has 3 columns: test_id (number), test_nbr (number), test_id2 (number).  Test_id column is identified as the primary key and the type of the source already exists a sequence rsn_test_seq.  Column test_id2 gets its default value 0 to a hidden page element.

  I would use my manual process for updating the value of the test_id2 column.  If it's 0 then I want to put the value of the column test_id.  If it is any other value, then it must remain at this value.  My logic works very well for an existing line, but I'm running into a problem with the newly added lines.  The new lines get inserted, but the test_id2 column remains the default value 0.  I can tell the debugger that the SRM process is triggered first and inserts the line, then my manual dealing with fires.  The problem seems to be that the connection variable: TEST_ID for the primary key column remains NULL after insertion.  I don't know how to get the value of the column test_id of my newly created line to use in my PL/SQL block to my update.

  Process of PL/SQL:

  DECLARE
  BEGIN
     :P7_SHOW := NULL;
     :P7_SHOW := NVL(:TEST_ID2,555) || ' and ' || NVL(:TEST_ID,787) || ' and ' || NVL(:TEST_NBR,9999);
     IF :TEST_ID2 = 0 AND :TEST_ID IS NOT NULL THEN
        UPDATE rsn_test
           SET test_id2 = :TEST_ID
         WHERE test_id = :TEST_ID;
     ELSE
        :TEST_ID2 := :TEST_ID2;
     END IF;
  END;
  
  

  Excerpt from the debugger:

  0.01625 0.00010 Processes - point: ON_SUBMIT_BEFORE_COMPUTATION
  0.01635 0.00008 Branch point: Before Computation
  0.01643 0.00003 Process point: AFTER_SUBMIT
  0.01646 0.00022 Tabs: Perform Branching for Tab Requests
  0.01668 0.00008 Branch point: Before Validation
  0.01676 0.00024 Validations:
  0.01700 0.00135 Perform basic and predefined validations:
  0.01835 0.00020 Perform custom validations:
  0.01855 0.00049 ...Validation "TEST_NBR must be numeric" - Type: ITEM_IS_NUMERIC
  0.01904 0.00007 ......Skip for row 1 because row hasn't changed
  0.01911 0.00016 ......Skip for row 2 because row hasn't changed
  0.01927 0.00012 ...Validation "TEST_ID2 must be numeric" - Type: ITEM_IS_NUMERIC
  0.01939 0.00007 ......Skip for row 1 because row hasn't changed
  0.01945 0.00018 ......Skip for row 2 because row hasn't changed
  0.01964 0.00005 Branch point: Before Processing
  0.01968 0.00004 Processes - point: AFTER_SUBMIT
  0.01972 0.00588 ...Process "ApplyMRU" - Type: MULTI_ROW_UPDATE
  0.02560 0.00154 ...Execute Statement: declare function x return varchar2 is begin begin for c1 in ( select "RSN_TEST_SEQ".nextval pk from sys.dual ) loop return c1.pk; end loop; end; return null; end; begin wwv_flow.g_value := x; end;
  0.02714 0.00140 ......Row 3: insert into "APPPCSRSN"."RSN_TEST" ( "TEST_ID", "TEST_NBR", "TEST_ID2") values ( :b1, :b2, :b3)
  0.02854 0.00011 ...Process "ApplyMRD" - Type: MULTI_ROW_DELETE
  0.02865 0.00004 ......Skip because condition or authorization evaluates to FALSE
  0.02869 0.00015 ...Process "Process Submit" - Type: PLSQL
  0.02884 0.00007 ......Skip for row 1 because row hasn't changed
  0.02891 0.00012 ......Skip for row 2 because row hasn't changed
  0.02903 0.00012 ......Process row 3
  0.02915 0.00429 ...Execute Statement: begin DECLARE BEGIN :P7_SHOW := NULL; :P7_SHOW := NVL(:TEST_ID2,555) || ' and ' || NVL(:TEST_ID,787) || ' and ' || NVL(:TEST_NBR,9999); IF :TEST_ID2 = 0 AND :TEST_ID IS NOT NULL THEN UPDATE rsn_test SET test_id2 = :TEST_NBR WHERE test_id = :TEST_ID; ELSE :TEST_ID2 := :TEST_ID2; END IF; END; end;
  0.03344 0.00013 ...Session State: Saved Item "P7_SHOW" New Value="0 and 787 and 1300"
  0.03356 0.00004 Branch point: After Processing
  0.03360 0.00048 ...Evaluating Branch: "AFTER_PROCESSING" Type: REDIRECT_URL Button: (No Button Pressed) Condition: (Unconditional)
  0.03407 0.00013 Redirecting to f?p=290:7:8717971109610:::::&success_msg=0%20row(s)%20updated%2C%201%20row(s)%20inserted.Success%2FEBD244168556408CBA714E3974918C09%2F
  0.03420 0.00012 Stop APEX Engine detected
  0.03432 0.00007 Stop APEX Engine detected
  0.03439 - Final commit
  
  

  Any suggestions?

  I have run tests on

  https://apex.Oracle.com/pls/apex/f?p=83488:1 demo/demo

  to see your problem.

  I have 2 solution for your problem.
  I add trial NOT tabular just usual block of PL/SQL

  	BEGIN
  	I'm IN (SELECT TEST_ID FROM RSN_TEST WHERE TEST_ID2 = 0)
  	LOOP
  	UPDATE RSN_TEST
  	SET test_id2 = TEST_ID
  	WHERE test_id = i.TEST_ID;
  	END LOOP;
  	END;

  and works very well, you can see in the sample.

  The other solution is to show new generated TEST_ID

  Adding a sequence as a default value for a column in a table field

  And to execute your procedure.

  I get how is with the good luck of time.

  By

• How to fill out the table foreign key to the primary key form

  Hi all

  I'm stuck in this problem for 3 days, and I'm about to research and implement solutions on the internet.

  I have two tables

  create table prim (a number primary key, b varchar2 (100));

  create table CHILD (a number references (a) prim, varchar2 (100)) c;

  I created a page for PRIM table.

  = page name form on PRIM2

  I have manually two columns for the CHILD table to know

  P26_A_1 (for the primary key in the CHILD table)

  P26_C (for the column in the CHILD Table c)

  now when the user clicks on the button CREATE, a row must be inserted into the child table.

  I want to assign the P26_A to P26_A_1 during the validation process, so that a line must be inserted into the PRIM table as well as in the CHILD table.

  How to do this?

  I downloaded my application page in https://apex.oracle.com

  my workspace identifiers are inferior to

  name of the workspace = IMBERT

  username = demo

  password = demo

  kindly guide me.

  Thank you.

  Hello

  I created a new page (page 30) similar to your page and added the insertion of the child. It just check the page and code. It works now, when you insert the prim file is triggered a second trial which inserts the child record manually.

  On page 26 it was some sort of mistake, was easier to create a new as it was almost a standard form.

  Concerning

  Bottom

• Too many objects correspond to the primary key oracle.jbo.Key

  I get this error: Too many objects match the primary key oracle.jbo.Key when I tried to look for in a display object where the primary key is consists of more than one filed.

  Use case:

  In Jdeveloper 11.1.2.3 I Entity object called someTable this table has three fields A,B and C where the primary key is consist class towing A and B .

  I created different towing View object of someTable object enity that are someTableVO1 and someTableVO2 . Rated A in the view object somtableVO1 is a List Of Value(LOV) and the data are coming form filed A in the someTableVO2 .

  In application I have a search page that contains a drop-down list of registered A in somTableVO1 . Based on certain conditions, the drop-down list of the values in the list is not static. The value of the drop-down list is editable based on a select query run on someTableVO1 and it is based on the class thried C is NOT part of the primary key .

  The page displays the drop down menu with the correct values. But I have a ValeChangeListener method that will be activated whenever the user selects a value form the drop-down list.

  The problem is:

  The error Too many objects match the primary key is occur whenever I am executing this method.

  Support:

  I think the problem is with multiple fields for the primary key. of curse, there is an overlap in a part of the primary key (IE that paid A or B ) but the combination of A and B are always unique.

  Notes:

  1. I check the query by executing SQL Developer and it shows not all duplicate values.

  2 I don't attach code, because I think that the problem is not on (how to) this is (what to do).

  I hope that the idea is clear

  Problem solved.

  My goal was to show a summer that A form someTableVO1 as a list of value and I was trying to achieve by creating the list of value the same form Entity object . I understand that it was the wrong approach (correct me if I'm wrong). to achieve this in ADF technology, I have to do the following:

  1. Simply to drag and drop the view object from the Data Controls page.
  2. List of options appears asking how you want to display the view object (shape, chart, table, only one selection,...).

  3. Select Single Selection ->ADF one Selection

  4. Select the attributes that you want to show the user a list of values.

  Thanks for your comments.

• Bad generation of DDL for indexes primary key partitioned - lost partitions

  Hello
  
  In our design of the database, we want to divide some tables and their indexes. The partition type is hash indexes must be local, also divided No problem affecting storage of the table partitions. Also no aucun probleme problem with the index partitions, not included the primary key.
  
  Our problem appears in the generation of DDL: partitions of tables and indexes are generated fine except the primary partitions it shows key - phrase-'alter table' primary key as if it was not partitioned.
  
  Apparently indexes primary keys must be generated as the other indices, is it not?
  
  Thanks in advance,
  
  Bernat Fabregat
  
  Published by: Berni 11/29/2010 12:37

  Hello Bernat,

  for local partitioning, you need to create indexes separated on column PK (if you do not already). Set partitioning for this index, and then in the dialog box for the primary key in the physical model:
  (1) in the 'Général' tab, clause "with the help of the index' - select 'by the name of the index.
  (2) in tab 'using Index' - 'Existing Index' drop-down list box - select defined index.

  Global partitioning can be created directly on the primary key in the physical model.

  Philippe

• Order columns (which make up the primary key constraint) matter in where clause of DML query for use of indexing mechanism to operate.

  Version of DB: database Oracle 11 g Enterprise Edition Release 11.2.0.3.0 - 64 bit Production

  
  I have a table my_table as below:
  create table my_table
  (
  my_code varchar2 (6).
  my_id varchar2 (24).
  forced pk_1 primary key (my_code, my_id)
  );

  
  Primary_key here's a composite key that contains columns 1 (my_code) and 2 (my_id).
  Is there that a difference in the way below queries is executed in terms of performance (use of indexing in the extraction).

  (a) select * from my_table where my_code = '123' and my_id = "456";
  (b) select * from my_table where my_id = '456' and my_code = '123';

  
  The understanding I have the order of the column in the where clause should be identical to the sequence in
  What primary key draws for indexing to be used by oracle in oracle other DML queries ignores indexing
  However when I used explain plain both show the same query cost with single scan with index rowid.
  so I don't know if I'm wrong in the concept that I have. Kindly help.

  Thanks in advance,
  Gerard

  Your question is answered in the Performance Tuning Guide

  Using indexes and clusters

  14.1.4 choosing composite indexes

  A composite index contains several key columns. Composite indexes can provide additional benefits compared to the index to single column:

  • Improved selectivity

    Sometimes the two or more columns or expressions, each with a low selectivity can be combined to form a composite with a high selectivity.

  • Reduced IO

    If all columns selected by a query are a composite index, then Oracle may return these values in the index without access to the table.

  A SQL statement can use a path on a composite index if the statement contains constructions that use a main part of the index.

  Note:

  This is no longer the case with the skip index scans. See "Index Skip Scans".

  A main part of an index is a set of one or more columns that have been specified first and consecutively in the list of columns in the CREATE INDEX statement that created the index.

• Make required error appears only the primary key generated in prior Database Table insert trigger

  Dear all,

  I am a beginner in the ADF and am under Jdeveloper Studio Edition Version 12.2.1.0.0.

  
  

  I'm trying to insert a record, I created the trigger for insertion prior to get the primary key and set some other default values.

  
  

  On the page, I did read-only primary key column and false required.

  
  

  When I try to save - commit (Programmatic), I get errors for the required value. How can I stop this errors.

  
  

  Secondly, I also tried changing the agent to disabled on the attribute View object that raised the error below:

  
  

  < oracle.dfw.impl.incident.DiagnosticsDataExtractorImpl > < DiagnosticsDataExtractorImpl > < createADRIncident > < incident created 148 to key problem "DFW-99998 [oracle.jbo.PersistenceException] [oracle.jbo.server.RowReference.verifyPrimaryKeys] [Proposals]" >

  
  

  Hoping for help.

  
  

  Thanks and greetings

  
  

  Arif Khadas
  

  If the primary key values from DB sequence, you can follow this approach:

  Using the sequence of database in ADF - Souza Waslley Blog

  Oracle Fusion Middleware Technologies: ADF 11 G: generate the primary key sequence number

  Otherwise, instead of DB trigger, create the DB function that retrieves the value of the PK and call stored function in the overloaded method create() entity:

• generate a numerical value to use as the primary key

  Can someone correct me, in an interview that the question was asked.

  How not one generates a numeric value to use as the primary key?

  Years

  We can get it using the sequence. For example:

  CREATE SEQUENCE cust_seq

  START BY
  1000

  INCREMENT OF
  1

  NOCACHE

  NOCYCLE;

  Hi Shu,

  sequence would be my choice and 12 c new type called identity.

• Get the primary key of entry just created by submitting the form

  Hi guys,.
  
  I have a form built in APEX based on a table. The PK is generated by the sequence and the values of the form are recorded by DML (insert).
  
  Do I have to do is once I have create a new entry with my, I need to update a whole bunch of other tables with the new PK that I can easily do this by creating a process of PL/SQL after DML.
  
  
  
  However, I need the primary key generated by the new entry (created by filling out the form + submit).
  
  One way around it is

  Select max(userid) from user

  to retrieve it, but I don't know if it's a good idea/practice.
  
  Any idea guys? See you soon.

  Taepodong wrote:
  Hi guys,.

  I have a form built in APEX based on a table. The PK is generated by the sequence and the values of the form are recorded by DML (insert).

  Do I have to do is once I have create a new entry with my, I need to update a whole bunch of other tables with the new PK that I can easily do this by creating a process of PL/SQL after DML.

  However, I need the primary key generated by the new entry (created by filling out the form + submit).

  One way around it is

  Select max(userid) from user
  

  to retrieve it, but I don't know if it's a good idea/practice.

  This will only give the maximum ID and not currently generated ID

  Any idea guys? See you soon.

  Use this feature APEX
  Change your page > change you the DTF process for the form > Enter you page back key point in the element (this returns the new pk value generated by this form)

• creating a unique index of instaed of using the primary key index

  Hello
  
  I heard in a debate sometimes it is better to create a unique index on a column and use it instead of using the primary key index in oracle. I did not understand what that the reason propely.
  
  Can someone please help me in this topic if it is valid.
  
  Thanks in advance

  On the surface, which does not seem reasonable... Volume of the DML is irrelevent to determine which column is the primary key for a table.

  My wild speculation a bit at a reasonable time could someone do...

  If you use synthetic primary keys (i.e. the keys generated by sequence) and that your tables are subject to large volumes of inserts such as there is a danger that the block "to the right" will be the source of contention block and worry not about analysis of beach on the column, you can create a reverse on this column (unique or non-unique) key index before creating the primary key constraint and to indicate Oracle to use this existing index to respect the primary key constraint.

  Obviously, however, this involves a lot of assumptions to arrive at a reasonable point. There may well be another set of assumptions that could also lead to a valid argument. Or it could be a myth that someone has heard and just repeats.

  Justin

• Shape of the apex - how to get the primary key value manually?

  Hello
  
  Whenever I create form by using wizard Apex, he asks me to specify the trigger/sequence/pl/sql function to fill the primary key value.
  
  However, if I want to specify primary key myself (ie. undetermined generated automatically), how I can clarify that?
  
  Thanx

  Hello

  You mean by yourself: by hand or by a pl/sql?

  If you say by trigger, the system does not take on what number is sent. If you can give it "manually".

  May I ask what is the reason for this?

  See you soon,.

  Arnaud