Nextval as default

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• New technique to generate the surrogate key

  Hello gurus,

  Just curious to know if there are new techniques (such as the built-in, or by specifying the option of IDENTITY generated automatically during the creation of the table itself) available in Oracle 11 g?

  Or the method to do this is by using the trigger-sequence?

  Thank you

  Sunil

  trigger-sequence.

  12 c has new techniques (identity column or the sequence.nextval as default setting), but 11g - you end up with the trigger-sequence.

• Pump diagram remapping of data with the default value of sequence (12 c feature)

  Hello

  in the 12 c Oracle database there is a new feature that allows you to set default values directly from a sequence:

  http://docs.Oracle.com/database/121/NEWFT/chapter12101.htm#NEWFT155

  This helps us to save the use of triggers to get the next value of an ID column for example the DDL of such a table might look something like this:

  CREATE TABLE "FOO"."MY_TABLE" ("ID" NUMBER(10,0) DEFAULT "FOO"."MY_TABLE_ID"."NEXTVAL", ...   );

  During the pattern FOO with Data Pump export and import the schema with the remap_schema option in the BAR diagram for example, mapping works fine for all the tables, triggers, etc. except those defaults (as Oracle always writes the schema information in these default values).

  The error in the output log that says 'FOO. MY_TABLE_ID"sequence is unknown, because the sequence is now called 'BAR. MY_TABLE_ID' - mapping so does not work for default values.

  Someone knows how to fix this?

  Thanks in advance

  Concerning

  Hello

  Read this note, I think that it is an expected behavior:

  http://docs.Oracle.com/CD/E11882_01/server.112/e22490/dp_import.htm#SUTIL927

  REMAP_SCHEMA

  .

  Restrictions

  * The mapping cannot be 100 percent complete because there are some references to diagrams that importing is not able to find. For example, import will not find of references to patterns incorporated into the body of the definitions of triggers, types, views, procedures and packages.  -I think in your case it is the default value.

  * If any table in the schema are remapped contains object types defined by the user and this table changes between the time wherever it is exported and the time you are trying to import, and then import this table will fail. However, the import operation will continue.

  HTH,

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• ANY_SEQ. NEXTVAL STARTS DO NOT AS YOU WISH

  Hello world

  I have this piece of code:

  drop table x;

  seq_x sequence of fall;

  create table x)

  number of x_id

  x_name varchar2 (20)

  );

  create the seq_x with 1 sequence;

  Insert x (x_id, x_name)

  values)

  seq_x.nextval,

  "Any name');

  commit;

  Then I run this query:

  Select * from x;

  And I get this output, where we see clearly, that this x_id is not starting with 1 as required:

  SQL > select * from x;

  X_ID X_NAME

  ----------     --------------------

  2 any name

  ... WHY?...

  Thank you...

  From 11 g Oracle presents the delayed segment creation. Now, by default, when you create table only metadata are created but not segment. So when the question you first insert it calculates to be inserted phrases, NEXTVAL in your case, and insert insiders who will fail internally since there is no segment. Oracle catches the exception, cancel the instruction work, creates the segment and re - starting to insert. NEXTVAL = 1 is lost. If you create the table with SEGMENT CREATING IMMEDIATE first inserted row will have the value 1 of the generated sequence.

  SY.

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

  Hi all

  APEX 4.2.4. Oracle XE 11.2

  I'm trying to add a default value from a sequence to a column in a table field, so he fills when I hit the "Add Row" button...

  The reason for this by the way, rather than simply using a sequence database and the trigger on the column (which exists and works very well), is that I try also add detail records to the line when I create, and I can not, I do not have the ID of the parent to the child records.

  Looking at the docs, (for example oracle 11 g pl/sql enhancements), I thought I'd have be able to use a PL/SQL expression as to_char (petty_cash_seq. NEXTVAL) or to_number (petty_cash_seq. NEXTVAL) or all that kind of expression that extracts the sequence.nextval, as it became available in PL/SQL on the database

  so, Ive tried

  TO_CHAR (petty_cash_seq. NEXTVAL) in tabular form attributes - column default / PL/SQL expression and he said ORA-02287: unauthorized number sequence here...

  Ive also tried rolling upward in a PL/SQL package, as below:

  DECLARE v_seq_value NUMBER; BEGIN select petty_cash_seq. NEXTVAL in the double v_seq_value; return v_seq_value; END;

  and I get ORA-00923: KEYWORD not found where expected.

  Can anyone help as to why neither of them do not seem to work as an expression / packages in the default type?

  or... a simple alternative to get the ID of the next record when I hit 'Add Row' before I can create child folders at the same time...

  And I've been mulling over the merits of the master / detail integrity and try to think in an orderly manner to create the mask, add the details without having to first submit the master, then go back and go into details... And put it into context, its a request for costs where users create an expense entry and download copies of their expenses at the same time...

  Thank you very much

  Richard

  Use a combination of AJAX and JavaScript to get the next value in the sequence in a version substituted the line Add.

  1. on the page editor, right-click on the Ajax callbacks and select Create.

  2. on the next page, select PL/SQL. Do * not * select the tabular presentation. Leave this field blank.

  3. name your process, e.g. getNextSequence

  4. Add the code (under the DIRECTION of your own names of the object):

  DECLARE
      ln_NextSequence NUMBER := 0;
  BEGIN
      SELECT MY_SEQUENCE.NEXTVAL
      INTO ln_NextSequence
      FROM DUAL;
  
      HTP.P(TO_CHAR(ln_NextSequence));
  END;
  

  5. When you look now, you will see that the button Add a line called javascript:addRow (). Remove all this and change the button to be triggered by a dynamic action.

  6. create a dynamic action when a click on your button to add a line

  7. Add the following JavaScript code to get the new value of the sequence using your AJAX call from above and then place it on the newly added line:

  var nextSequenceID;
  
  apex.server.process(   'getNextSequence'
                       , {}
                       , { dataType: "text",
                           async: false,
                           complete: function( ajaxResponse )
                                    {
                                      nextSequenceID = ajaxResponse.responseText;
                                    }
                         });
  
  addRow();
  
  $('td [headers="YOUR_ID_COLUMN_NAME_HERE"] input:last').val(nextSequenceID);
  

  -Joe

• How to access the NEXTVAL CURRVAL on columns of IDENTITY Oracle 12 c?

  With the help of Oracle 12 c I defined an identity column:

  create table test (col1 number generated default as identity (start with 1 by 1 increment), col2 varchar2 (100));

  Oracle then automatically generates a sequence for my identity column.

  Is there a way (/ the call of the function/etc..) to access the CURRVAL / NEXTVAL for this given sequence I don't have the name of sequence? (without having to query the system catalog).

  I try to avoid the manual creation of a sequence for each of the tables that need the auto-numbering and let Oracle manage automatically creating the sequence, but I need to join the just inserted number in my identity column when inserting in the line, essentially the CURRVAL. Looking forward to use IDENTITY columns...

  Thank you!

  user537222 wrote:

  With the help of Oracle 12 c I defined an identity column:

  create table test (col1 number generated default as identity (start with 1 by 1 increment), col2 varchar2 (100));

  Oracle then automatically generates a sequence for my identity column.

  Is there a way (/ the call of the function/etc..) to access the CURRVAL / NEXTVAL for this given sequence I don't have the name of sequence? (without having to query the system catalog).

  I try to avoid the manual creation of a sequence for each of the tables that need the auto-numbering and let Oracle manage automatically creating the sequence, but I need to join the just inserted number in my identity column when inserting in the line, essentially the CURRVAL. Looking forward to use IDENTITY columns...

  Thank you!

  You can do this in the way you would normally do: using PL/SQL and the RETURNING clause. Here is an article from the Oracle base that shows the use of a RETURNING clause. Just ignore the part that explicitly inserts the value of the sequence given that the IDENTITY column that will do it for you.j

  http://www.Oracle-base.com/articles/Misc/DML-returning-into-clause.php

  >

  SET SERVEROUTPUT ON

  DECLARE

  T1.ID%type l_id;

  BEGIN

  INSERT INTO t1 VALUES (t1_seq.nextval, 'FOUR')

  RETURN the id INTO l_id;

  COMMIT;

  Dbms_output.put_line ('ID =' | l_id);

  END;

  /

  ID = 4

  PL/SQL procedure successfully completed.

  >

• DEFAULT FIELD VALUES

  Hi all
  
  Apex 4.0
  
  
  
  In my data entry form page.
  
  I have P2_DATE_CREATED. How can I set a default value to it as 'SYSDATE '?
  
  I have P2_ORDER_NUMBER. I want to be in default, by selecting a sequence number > select nextval (order_seq) in: double P2_ORDER_NUMBER;
  
  How do I achieve this thing please... Thank you

  Hello

  Subordinate the calculation:
  Go to the calculation-> Condition Bugfix
  Condition Type: Article 1 of the Expression value is NULL
  Term 1:

  Kind regards
  Kiran

• ORA-00984: column not allowed here, when you try to use a default UDF

  I am wanting to create a table that has a default value of a user-defined function, and because this default is intended to be used in a few different places so I would use a function rather than in the table definition.
  
  This is my current code that works very well:

  CREATE TABLE DEPT_HIST
  (
    DEPTNO      NUMBER(2) not null,
    DNAME       VARCHAR2(14),
    LOC         VARCHAR2(13),
    SQL_ACTV_C  CHAR(1) not null,
    EFFT_STRT_S TIMESTAMP(6) default SYSTIMESTAMP not null,
    EFFT_END_S  TIMESTAMP(6) default TO_TIMESTAMP('9999/12/30 00:00:00.000000', 'YYYY/MM/DD:HH24:MI:SS.FF6') not null,
    DELT_F      CHAR(1) default 'N' not null
  );

  but I would get something similar to this work:

  CREATE OR REPLACE FUNCTION EOT
     RETURN timestamp
  IS
     Result   timestamp;
  BEGIN
     RETURN (TO_TIMESTAMP ('9999/12/30 00:00:00.000000',
                           'YYYY/MM/DD:HH24:MI:SS.FF6'));
  END EOT;
  /
  
  select eot from dual;
  
  EOT
  ---------------------------------------------------------------------------
  30/DEC/99 12:00:00.000000000 AM
  
  CREATE TABLE DEPT_HIST
  (
    DEPTNO      NUMBER(2) not null,
    DNAME       VARCHAR2(14),
    LOC         VARCHAR2(13),
    SQL_ACTV_C  CHAR(1) not null,
    EFFT_STRT_S TIMESTAMP(6) default SYSTIMESTAMP not null,
    EFFT_END_S  TIMESTAMP(6) default EOT not null,
    DELT_F      CHAR(1) default 'N' not null
  );

  but I get an error of:

    EFFT_END_S  TIMESTAMP(6) default EOT not null,
                                     *
  ERROR at line 8:
  ORA-00984: column not allowed here

  Any ideas? I guess I could use a trigger but not exactly what I'm after.

  Hello

  Sorry; No function defined by the user in the DEFAULT clause.
  From SQL, under "CREATE TABLE Statement" language manual
  http://download.Oracle.com/docs/CD/B28359_01/server.111/b28286/statements_7002.htm#sthref7119

  Restriction on default column values

  
  A DEFAULT expression cannot contain references to the functions PL/SQL or other columns, the nickname CURRVAL, NEXTVAL, LEVEL, PRIOR and ROWNUM, or date constants that are not completely specified.

  I wouldn't use a trip just for that. If you need a trigger for other reasons, then maybe you can include the definition of this column in the trigger, too, but, in general, avoid triggers when there is an alternative.

• Default value for the text in a tabular presentation element

  Hello
  
  I creates a tabular form generated by using a SQL query.
  I would like to first of all the value for a column of nextval deault a sequence when an empty row is added using the add a LINE button
  
  my request currently for the sequence value column when you click on the ADD row button is:
  apex_item.display_and_save (4, NULL) as trans_id,.
  
  I want this column trans_id trans_seq.nextval where trans_seq is a default sequence.
  
  I tried specifying the default value in the column attributes (expression of PL/SQL - trans_seq.nextval) which does not work.
  If I give in the SQL query, it throws an error saying that the unauthorized sequence here...
  
  My query is structured as follows:

  SELECT
  apex_item.display_and_save (4,c002) trans_id
  FROM
  apex_collections
  WHERE collection_name = 'TRANSACTIONS'
  UNION ALL
  SELECT
  apex_item.display_and_save (4,NULL)  as  trans_id
  FROM DUAL
       WHERE :request = 'ADD_ROW_MANUAL'

  Appreciate any help in this regard. I hope that my question is explained clearly
  
  Thanks in advance,
  Dippy
  
  Published by: Fisher on February 16, 2010 12:41
  
  Published by: Fisher on February 16, 2010 15:55

  Hello.

  1. create a function named next_value

  create or replace function next_value
  return number
  is
  ret_value number;
  begin
  select trans_seq.nextval into ret_value from dual;
  return ret_value;
  end;
  

  2 display the query as below

   SELECT
  apex_item.display_and_save (4,c002) trans_id
  FROM
  apex_collections
  WHERE collection_name = 'TRANSACTIONS'
  UNION ALL
  SELECT
  apex_item.display_and_save (4,next_value())  as  trans_id
  FROM DUAL
       WHERE :request = 'ADD_ROW_MANUAL'
  

  Kind regards
  Shijesh

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