Regarding oracle sequence

hi all,
i have plan to use sequence in oracle,but i dont know how to use it.
My table has 5 columns,but i have sent only 4 parameters from java ,another one column should use sequence..
how can i use sequence in oracle table?
plz...

There are two ways.
One is you create a trigger that inserts the pk column with the next value from the sequence whenever you create a new row.
CREATE OR REPLACE TRIGGER "MYSCHEMA"."NEWROW" BEFORE INSERT ON "MYSCHEMA"."MY_TABLE" REFERENCING OLD AS OLD NEW AS NEW FOR EACH ROW WHEN (new.id = 0 or new.id is null)
BEGIN
SELECT MYSCHEMA.MYSEQUENCE.NEXTVAL INTO :new.IID from DUAL;
END;Then you only need to insert the four columns (without the primary key colum)
The other one is you query the next sequence value from the database using a SQL statement like:
SELECT MYSCHEMA.MYSEQUENCE.NEXTVAL from DUAL;and insert the five columns (including the primary key column)

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JPA: Oracle Sequence Generator not up to date

Hi,
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@Entity
@Table(name = "DACC_COST_TYPE")
public class JPACostType implements Serializable {
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@PersistenceContext
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JPACostType myJPA = new JPACostType();
myJPA.setIdCostType = null;
em.merge(myJPA);
em.flush();
Normally this works fine. But after deploying the app there sometimes happens an error:
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at com.sap.engine.services.orpersistence.core.PersistenceContextImpl.flush(PersistenceContextImpl.java:278)
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at com.sap.engine.services.orpersistence.environment.AppJTAEnvironmentManager.beforeCompletion(AppJTAEnvironmentManager.java:197)
at com.sap.engine.services.ts.jta.impl.TransactionImpl.commit(TransactionImpl.java:232)
... 52 more
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Obviously JPA does not fetch the new key by accessing the Oracle sequence. This documents "next value = 5". Does JPA fetch the new key from its cache? Is there any possibility to avoid this?
Thanks for each hint,
Christoph

Hello Christoph Schäfer ,
I am stuck with a similar issue. I was able to save mutiple entries and there has not been much change to my JPA. I added new entities and new sequences.
Now, I get the error Caused by: javax.persistence.PersistenceException: java.sql.SQLException: ORA-02289: Sequence ist nicht vorhanden.
I have checked the name of sequence and sequence next val on the DB. It works on DB but when i execute it from ejb, it gives me thsi error. Now, it gives the error for all previously working JPA entities.
I have also provided allocationSize = 1 for all entities.
Please let me know, possible cause/solution to this issue.
thank you.
Regards,
Sharath

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Hello,
I wish to insert rows inside the database, for instance rows representing persons, and rows representing their addresses. Primary keys for both person and address are Oracle sequence based.
My question is, if I insert a person, then one of her address, how can I retrieve the person ID for the address row to reference it.
The insert statement for the person is (for the moment) as follow
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Could you provide me with some hints?

Hi,
First I would advise you to register and post on the [email protected] alias - you can find the details of how to do this on the OpenESB site..... you'll reach a larger audience this way.
Second, you need a Stored Procedure in Oracle to do this, then use this from the DB BC, here's one I created which does something similar, i.e. returns a value I'm interested in after an "Update" statement....
CREATE OR REPLACE PROCEDURE "NEXTAPPNUMFINDER" (nextAppNum OUT NUMBER)
IS
BEGIN
UPDATE ACTIVE_APPLICATION_NUMBER
SET APPLICATION_NUMBER_NEXT = APPLICATION_NUMBER_NEXT + 1
RETURNING APPLICATION_NUMBER_NEXT
INTO nextAppNum;
END;
Hope this helps
Mark

Using oracle sequence in SQL Loader

I'm using oracle sequence in control file of sql loader to load data from .csv file.
Controlfile:
LOAD DATA APPEND
INTO TABLE PHONE_LIST
FIELDS TERMINATED BY "," TRAILING NULLCOLS
PHONE_LIST_ID "seqId.NEXTVAL",
COUNTRY_CODE CHAR,
CITY_CODE CHAR,
BEGIN_RANGE CHAR,
END_RANGE CHAR ,
BLOCKED_FREE_FLAG CHAR
Datafile:
1516,8,9,9,B
1517,1,1,2,B
1518,8,9,9,B
1519,8,9,9,B
1520,8,9,9,B
1521,8,9,9,B
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This gives me error "Can not insert NULL value for last column"
Is it mandatory to specify first column in datafile, even though we are using sequence?
2) Another table is referencing PHONE_LIST_ID column (the one for which we using sequence) of this table as a foreign key.
So is it possible to insert this column values in other table simultaneously? Sequence no. should be same as it is in first table...
Kindly reply this on urgent basis....

use BEFORE INSERT trigger
with
select your_seq.nextval into :new.id from dual;

Bind variable with Oracle sequence

can we insert oracle sequence with the bind varaible
some thing like
seq       number(5);
begin
select myseq.nextval
        into seq        from dual;
dbms_sql.parse( l_cursor,insert into mytable (c1,c2,c3) values (seq,:1,:2),dbms_sql.native );
dbms_sql.bind_variable( l_cursor, :1,58);
dbms_sql.bind_variable( l_cursor, :2,9);
l_status := dbms_sql.execute( l_cursor );
end;
Thanks!

What are you trying there..
Why dynamic SQL?
Where is the exception block?
you have to use 'using ' to work with these kind of dynamic variables. Something like this (ugly code below)
CREATE SEQUENCE myseq;
create table mytable (c1 number,c2 number, c3 number;
DECLARE
   seq   NUMBER (5);
   A number;
   b NUMBER;
BEGIN
   SELECT myseq.NEXTVAL INTO seq FROM DUAL;
   a := 1;
   b := 58;
   EXECUTE IMMEDIATE 'insert into mytable (c1,c2,c3) values (:seq,:1,:2)'
      USING seq, a, b;
   a := 1;
   b := 100;
   EXECUTE IMMEDIATE 'insert into mytable (c1,c2,c3) values (:seq,:1,:2)'
      USING seq, a, b;
   COMMIT;
END; --- Check you need to have proper exception block.
Cheers,
Manik.

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hello
my pc has following configurtion
256mb ram
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p4 2.4 ghz
win xp pro sp2
I want to know if my pc will be able to run " Oracle Database 10g Release 2 (10.2.0.1.0) " standard edition on it.
<<http://www.oracle.com/technology/software/products/database/oracle10g/htdocs/10201winsoft.html>>
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I suggest you not to doubt regarding Oracle Database 10g Release 2 (10.2.0.1.0) installation.
It is not necessary. If you don't receive an answer within a reasonable amount of time you could edit your thread with whatever ( a period is enough) to raise it to the top once again.
It becomes difficult for us to track duplicated threads and unnecessarily duplicates efforts.
~ Madrid.

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Hello,
I'm new to ORACLE and Intented to become Oracle Developer and DBA. I've question regarding Oracle Database Client software.
I know that there is Oracle Database server software but what is this Oracle Database Client. Is there any need to Install it on client machine as client mostly access the database use application software mainly develope in Java or C# etc. So, what is it need.
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Instant Client
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SQLPlus
SQL*Plus is a client application that runs on the client side, when you open a session it requests an Oracle server process to be executed on the server side. Once the session has been successfully setup then you can issue SQL commands from the client side. You should be aware that even if you launch SQL*Plus from the server side you will be working with two processes, one for the client and the second one for the oracle server. This connection mode is also known as dedicated server, but you should be aware that there is another connection mode known as shared server, I won't explain it since it already goes off topic.
~ Madrid
http://hrivera99.blogspot.com

Oracle sequence problem in CMP Entity EJB

I have a problem with Oracle sequence when I am using from the CMP entity EJB in WebLogic
6.1:
The problem is when the WebLogic server starts it acquires the correct sequence number
from Oracle, but during the runtime, when I open a new sqlplus window and increment
the sequence number, the container is not picking up from the new incremented value
instead it is still continuining by incrementing the old sequence number it has acquired
when it fetched from Oracle last time.
The sequence increment and key-cache-size in weblogic-cmp-rdbms-jar.xml are exactly
same
Any help would be greatly appreciated.

Change the key-cache-size to 1 in weblogic-cmp-rdbms-jar.xml and then try
your experiment again.
-- Anand
"Satya" <[email protected]> wrote in message
news:3d06274c$[email protected]..
>
I have a problem with Oracle sequence when I am using from the CMP entityEJB in WebLogic
6.1:
The problem is when the WebLogic server starts it acquires the correctsequence number
from Oracle, but during the runtime, when I open a new sqlplus window andincrement
the sequence number, the container is not picking up from the newincremented value
instead it is still continuining by incrementing the old sequence numberit has acquired
when it fetched from Oracle last time.
The sequence increment and key-cache-size in weblogic-cmp-rdbms-jar.xmlare exactly
same
Any help would be greatly appreciated.

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Daniel,
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I just can't help but think that coverting my data to SQL*Loader format, and then having it parse it and send it to the database in some form must be slower than me just sending whatever SQL Loader sends to the DB myself using OCI. Am I missing something?
The SQL Loader documentation seems to suggest that SQL*Loader just turns the input into alot of INSERT stateemnts. If so, can't I just do this?
My performance with OCI and INSERT statements isn't very good, but I believe I am doing one transaction per insert. Might I be as well off to concentrate on fine tuning my OCI based code using INSERTs?
I will actually do some time tests myself, but I would appreciate your opinion.
Once again thanks for the great info you have provided.

Bulk Fetch From an Oracle Sequence

I am trying to get a range of sequence values from an Oracle sequence.
I am using the option as show below using query
SELECT SEQUENCE_NAME.NEXTVAL FROM SYS.DUAL CONNECT BY LEVEL <= 10.
The above SQL gets 10 sequence value.
I just wanted to to check, if the implementation below is safe in a Multi User Environment?
Is the statement show below atomic. i.e. Multi parallel execution of the same function; Would it cause any inconsistencies?
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BULK COLLECT INTO v_seq_list;
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i_quantity IN INTEGER)
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v_seq_list sequence_list;
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Acquire Lock
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How does that correlate with your previous statement that you get 10 at a time?
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We wanted to implement the range get of sequence using a different mechanism.
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I'm not talking about using your own table to control actual one-by-one sequence number generation - that is a very bad idea. But if you need to work with large ranges that are allocated infrequently there is nothing wrong with using your own function and your own table to keep track of those allocations.
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Your function would take a parameter for how many numbers you need. For just one number the function would call the sequence.nextval and return that along with a count of '1'.
For a range the function would:
1. find a row in the table with an 'available_numbers' value large enough to satisfy the request,
2. lock the row for update
3. capture the 'start_value' for return to the user
4. adjust both the 'start_value' and 'available_numbers' values to account for the range being allocated
5. update the table and commit
6. return the 'start_value' and 'number_allocated' to the user (number_allocated might be LESS than requested perhaps)
The above is a viable solution ONLY if the frequency of allocation and the size of allocation avoids the serialization issues associated with trying to allocate your own sequence numbers.
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Hi,
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Many thanks in advance.
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hi
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Regarding oracle sequence

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