How generate primary key atumatically in jdeveloper 10g

Hi,
I am using jdev 10g. I created a fusion web applicaton.
I am not getting any option to generate primary key from sequence automatically.
In Jdev11g we can create by trigger easily.
Please help
Thanks
Raj

Hi Raj,
Check this link
[http://download.oracle.com/docs/html/B25947_01/bcentities006.htm#sm0147|http://download.oracle.com/docs/html/B25947_01/bcentities006.htm#sm0147]
Regards,
Vikram

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Generate primary key automatically

Hi, I'd like to know how to generate primary keys automatically with JHeadStart because when I try to make an insert into a table, the page gives me the option of insert the primary key of the register.
Thanks a lot

I have a table which have 2 fields, one of those is the primary key, the other is the description.
I have established the primary key as a DBSequence, but when I try to insert a new record testing the service, appears a negative number in the primary key and instead of that I want to appear the correspondent key, or if doesn't appear the correct value, the insert be done correctly.
At least I change manually the value if this key, the insert can't be done.

Sequences to generate primary keys

Hi,
A question on using sequences to generate primary keys. We have a table and in all environments, test, uat, prod, a sequence exists to generate the primary key for the table. This table is a reference table and is not updateable by the users.
When developing scripts to insert records into the table, the developers are currently not using the sequence but typing in unique numbers so data scripts consist of something like this:
INSERT INTO EMPLOYEE_GROUP
(employee_group_id, code, description,...)
VALUES
(45,'sdf','sdfsdfsf');
INSERT INTO EMPLOYEE_GROUP
(employee_group_id, code, description,...)
VALUES
(46,'sdf','sdfsdfsf',...);
a) Is this normal practice?
b) Sometimes they are using the sequence to generate the primary key in development but then hardcoding the number in the script so in development the sequence might be at 160, but in the other environments the sequences will still be at one. Is this also normal practice?
My usual method in developing scripts is to use <seqeunce>.nextval but it's somewhat incompatitble in the current environment.

You are using a surrogate, or synthetic primary key. For a primary key generated in this way, the value is inconsequential. All that matters is that it is unique and the tables with foreign keys into it, if any, also have that value set properly. But it doesn't matter if the value is 1, 100, 12344, 2222222222, etc. All you care about is the uniqueness.
If you create the data properly then child records and their parents should be correct in all systems you mention, it's just that the actual value of the key will differ and that's fine. You care about the relationship of the records, not the value of the synthetic keys.

How many primary keys use in one table

Hi,
Please help me. Maximum How many primary keys use with in one table
Regards,
Sunil Kumar.T

Hi,
For my knowledge, It depends on the Database & version u r working.. Right..
This is a sample description what I seen for a Database...
Technical Specification of SAP DB Version 7.4
Description                            Maximum Value
Database size                    32 TB (with 8 KB page size)
Number of files/volumes per database64...4096, specified by a configuration parameter
File/volume size (data)      518 ...8 GB (dependent on operating system limitations)
File/volume size (log)1      6 TB (dependent on operating system limitations)
SQL statement length>= 16 KB (Default value 64 KB, specified by a system variable)
SQL character string lengthSpecified by a system variable
Identifier length                32 characters
Numeric precision              38 places
Number of tables unlimited
Number of columns per table (with KEY) 1024
Number of columns per table (without KEY) 1023
Number of primary key columns per table 512
Number of columns in an index 16
Reward Points if useful

About how to build dynamic maps using jdeveloper 10g and mapviewer

i follow the guidance (about how to build dynamic maps using jdeveloper 10g and oracle application server mapviewer) to write a jsp file,but error take palce ,i get information "Project: D:\jdev1012\jdev\mywork\WebMap\ViewController\ViewController.jpr
D:\jdev1012\jdev\mywork\WebMap\ViewController\public_html\WebMap.jsp
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can you help?
greetings

I found a lot of information in document 133682.1 on metalink.
step by step example how to deploy a JSP business component application.

How many primary keys can w have in cube, ods objects?

how many primary keys can w have in cube, ods objects?

Hi Naresh,
16 primary keys only possible(for cube: 16 dimensions, ODS - Keyfields)
For ODS:
-         You can create a maximum of 16 key fields (if you have more key fields, you can combine fields using a routine for a key field (concatenate).)
-         You can create a maximum of 749 fields
-         You can use 1962 bytes (minus 44 bytes for the change log)
-         You cannot include key figures as key fields
More info: [Creating ODS Objects|http://help.sap.com/saphelp_nw04/helpdata/EN/4a/e71f39488fee0ce10000000a114084/content.htm]
Hope it Helps
Srini
[Dont forget to close the call by assigning poings.... - Food for Points: Make a Difference through Community Contribution!|https://www.sdn.sap.com/irj/sdn/index?rid=/webcontent/uuid/007928c5-c4ef-2a10-d9a3-8109ae621a82]

How many primary key fields allowed for one table?

hi,
when i creating a table , how many primary key fields are allowed for one table.
please any one give ans
thanks

Just checked it, Its 255, not 155. You can have as many key fields as you want, but you can not go over the 255 byte length for the total of all key fields. You will get a warning for over 120, as it says that there is limited functionality with a key over 120 in length.
Again, this is a total length of all key fields.
Regards,
Rich Heilman

How to "auto" generate "Primary Key" in custom table?

Hi Folks,
Requirement:
I need a function module or program that can create automatically a primary key.
Scenario:
I have a program that creates an entries and save it to a custom table at the same time, but a primary key should always be generated respective to the entries saved.
Example:
Material(MATNR) 4001001, Plant(WERKS) XX01, ID[Primary Key-auto generated]
(I'm thinking of a similar concept/logic on how a unique IDOC number is being generated or how SAP standard creates a unique entry)
I try to look for any SAP FM that can generate a PK, but there's no luck.
Thanks.
Regards,
Jun

Hi Keshu and All,
The links are helpful, however:
#1. I don't have authorization to create a new object in transaction SNRO, but the way I see the objects in SNRO is just for defining the length(number of characters) for the ranges that will be use if I'm not mistaken.
#2. FM NUMBER_GET_NEXT - yes it can populate incremental unique entries but it's only occurring at runtime ?? So when the program get terminated it's not being saved nowhere.
So after if I use FM NUMBER_GET_NEXT, I always have to look for all the last primary key in my custom table, then target it as my starting point for creating a new PK. I think this will give a performance issue, any comments?
For better visualization, I have scenario:
1. (ZQ_CREATE_PK) Create unique incremental PK for material, batch, so on..
2. Append line/entries to ZQ_TABLE
3. Repeat #1 and #2
4. User exits the program
5. Back to 1 --> At this point, I need to get the "LATEST" PK then start this as a starting point again to generate PK and append it to ZQ_TABLE
I'm assuming that SAP has other SAP FMs related in creating this scenario. Similar to IDOC # creation..
Thanks.

How to obtain automatically generated primary key

Are there any ways to obtain the value of a primary key which is generated automatically by a server?
Thanks.

Are there any ways to obtain the value of a primary
key which is generated automatically by a server?Yes, if you are using JDBC 3.0 and a driver that supports it.
You do something like this (from the JDBC getting started guid at http://java.sun.com/j2se/1.4/docs/guide/jdbc/getstart/statement.html#1000569):
String sql = "INSERT INTO AUTHORS (LAST, FIRST, HOME) VALUES " +
                                                  "'PARKER', 'DOROTHY', 'USA', keyColumn";
int rows = stmt.executeUpdate(sql,
                                                                Statement.RETURN_GENERATED_KEYS);
ResultSet rs = stmt.getGeneratedKeys();
if (rs.next()) {
        ResultSetMetaData rsmd = rs.getMetaData();
        int colCount = rsmd.getColumnCount();
        do {
                for (int i = 1; i <= colCount; i++) {
                        String key = rs.getString(i);
                        System.out.println("key " + i + "is " + key);
        while (rs.next();)
else {
        System.out.println("There are no generated keys.");
}

JDO Auto Generate Primary Key

Hi
I am working with JDO.
I want to auto generate the primary key value that should increment for each entry into database.
How can i do it, please guide me.
Any link or doc will be appreciated.
Regards
Osman

There is only one answer to "how I do this" questions: read the manual.
Any link or doc will be appreciated.Google. Seriously dude, a forum is not your personal information service - go make some effort yourself. Come back when you have an actual problem that you need help with.

Help required to generate primary key sequence

Hello All,
I need your help in generating a sequence for primary key in my db table created using java dictionary project in my NWDS 7.3.
The table column EMPL_ID is a primary and needs to be a sequence. The code in the JPA entity is as below. The underlying database is DB2 on Linux. Kindly help me resolve this issue.
* The persistent class for the TMP_EMPL_DATA database table.
@Entity
@Table(name="TMP_EMPL_DATA")
public class TmpEmplData implements Serializable {
     private static final long serialVersionUID = 1L;
     @Id
     @SequenceGenerator(name="EMPLID_GENERATOR", sequenceName="EMPID_SEQ", initialValue = 10000, allocationSize = 1)
     @GeneratedValue(strategy=GenerationType.SEQUENCE, generator="EMPLID_GENERATOR")
     @Column(name="EMPL_ID")
     private String _emplId_;
My bean class contains a public method as follows.
public TmpEmplData createEmployee(String employeeName, int age, String location)
         TmpEmplData emplData = new TmpEmplData();
         emplData.set_emplName_(employeeName);
         emplData.setAge(age);
         emplData.setLocation(location);
         entityManager.persist(emplData);
         entityManager.find(TmpEmplData.class, emplData.get_emplId_());
         return emplData;
During execution, i am getting an error as below.
Caused by: javax.persistence.PersistenceException: The generated SQL statement is not valid for the underlying database platform (platform no. 99). For more details see attached exception. SQL statement is SELECT NEXT VALUE FOR "EMPID_SEQ" FROM ( VALUES (1) )
at com.sap.engine.services.orpersistence.sqlmapper.mapping.JPASQLMapperImpl.createSequenceIDGeneratorSelectText(JPASQLMapperImpl.java:1239)
at com.sap.engine.services.orpersistence.entitymanager.CachedJPASQLMapper.createSequenceIDGeneratorSelectText(CachedJPASQLMapper.java:259)
at com.sap.engine.services.orpersistence.generator.GeneratorFactory.<init>(GeneratorFactory.java:156)
at com.sap.engine.services.orpersistence.entitymanager.EntityManagerFactoryImpl$MetaDataImpl.<init>(EntityManagerFactoryImpl.java:323)
at com.sap.engine.services.orpersistence.entitymanager.EntityManagerFactoryImpl.<init>(EntityManagerFactoryImpl.java:137)
at com.sap.engine.services.orpersistence.entitymanager.JtaEntityManagerFactoryImpl.<init>(JtaEntityManagerFactoryImpl.java:39)
at com.sap.engine.services.orpersistence.provider.PersistenceProviderImpl.createJtaEntityManagerFactory(PersistenceProviderImpl.java:251)
at com.sap.engine.services.orpersistence.provider.PersistenceProviderImpl.createContainerEntityManagerFactory(PersistenceProviderImpl.java:236)
at com.sap.engine.services.orpersistence.container.EMFInstanceCreator.getEntityManagerFactory(EMFInstanceCreator.java:134)
at com.sap.engine.services.orpersistence.container.ORPersistenceObjectFactory.getEMF(ORPersistenceObjectFactory.java:300)
at com.sap.engine.services.orpersistence.container.ORPersistenceObjectFactory.getObjectInstance(ORPersistenceObjectFactory.java:73)
at com.sap.engine.lib.injection.ReferenceObjectFactory.getObject(ReferenceObjectFactory.java:96)
at com.sap.engine.lib.injection.FieldInjector.inject(FieldInjector.java:113)
... 122 more
Caused by: com.sap.engine.services.orpersistence.sqlmapper.generate.SQLMappingException: SQL statement is not valid for underlying database platform.
at com.sap.engine.services.orpersistence.sqlmapper.common.CommonSQLMappingResult.getStatementString(CommonSQLMappingResult.java:237)
at com.sap.engine.services.orpersistence.sqlmapper.mapping.JPASQLMapperImpl.createSequenceIDGeneratorSelectText(JPASQLMapperImpl.java:1237)
... 134 more
Caused by: com.sap.sql.tree.StringRepresentationFailureException: Cannot represent next value expression as string.
at com.sap.sql.tree.impl.OpenSqlTextExpert.nextValueExpressionToText(OpenSqlTextExpert.java:185)
at com.sap.sql.tree.impl.NextValueExpressionBuilderImpl$NextValueExpressionImpl.toSqlTxt(NextValueExpressionBuilderImpl.java:140)
at com.sap.sql.tree.impl.AbstractSqlTextExpert.selectSublistToText(AbstractSqlTextExpert.java:130)
at com.sap.sql.tree.impl.SelectSublistImpl.toSqlTxt(SelectSublistImpl.java:150)
at com.sap.sql.tree.impl.QuerySpecificationImpl.toSqlTxt(QuerySpecificationImpl.java:361)
at com.sap.sql.tree.impl.SelectStatementImpl.toSqlTxt(SelectStatementImpl.java:139)
at com.sap.sql.tree.impl.SQLStatementImpl.toSqlString(SQLStatementImpl.java:75)
at com.sap.engine.services.orpersistence.sqlmapper.common.CommonSQLMappingResult.getStatementString(CommonSQLMappingResult.java:233)
... 135 more

Hi,
does the sequence exist? SAP JPA does not support creation of sequences, you have to create it manually.
Maybe SAP JPA also does not support DB2 sequences with "Open SQL" correctly.
- Tryp to set your data source to "native" or "vendor".
- Try to turn on oracle compatibility:
db2set DB2_COMPATIBILITY_VECTOR=ORA
Regards
Rolf

Auto Increment of primary key value in jdeveloper.

hi all,
i have one table with one primary key.
i want to increment that primary key when ever i go for CreateInsert or create operation in JSF page.
i have tried with db sequence value type, but i was not able to achieve my condition. in DB Sequence i got error like cannot convert java.class.string to java.class.dbsequence.
can any one suggest me in this to achieve my condition.
regards,
M vijayalakshmi.

hi all,
from this i found the simple method to achive the auto increment of primary key.
http://www.techartifact.com/blogs/2012/10/adding-number-for-primary-key-in-oracle-adf-using-groovy-by-sequence.html#ixzz2EeU9CWo6
in this am facing an one small issue.
intial value of the primary key is 1.
for this value i have entered the row of data.
again i have clicked on the create button.
then the value of the primary key has increased to 2.
for this value i didnt entered the row of data to databse.
just i closed the browser.
if i run the run page again, the value of primary key is 3.
my requirment is i shd get the value of primary key is "2".
the increment shd happen the maxi value present in the primary key of the table.
can any one help me in this how to achive this.
thanks in advance.
regards,
M vijayalakshmi.

How to create Application Workspace with Jdeveloper 10g 1.3.2?

Following the instructions in "Developing and Using ADF Faces Skins", I am trying to create an Application Workspace.
The instruction says: "In JDeveloper, create a new Application workspace and name it - ADFFaces_skin_sample"
I can not find the way to create Application workspace with Jdeveloper 10g 1.3.2.
Because when I click FILE==>New I got "New Gallery--Application" in left, in right only got "Application, Empty project, File, Java Class, Java Interface". There is no "workspace" item.
I try to use Jdeveloper 10g 1.3.1, got same result.
I found other ADF Skin training samples. All of them asked to create Application Workspace. But the Jdeveloper version used by all those samples were earlier than 10g 10.1.3.2
Please let know how to create "Application Workspace"?

What used to be "Application Workspace" in 10.1.2 is "Application" in 10.1.3.2

Is this good approach for generating Primary Keys ?

Hi,
All our EJBs are state less Session Beans.
We have created a state less Session(name SequenceEJB) for getting Primary Key.
Thre is a method,
int getSequenceNumber(String tableName,String fieldName) in SequenceEJB. And the following query is used in the above said method.
SELECT MAX("+fieldName+") ID FROM "+tableName
Each EJB will lookup SequenceEJB, and call the above said method for getting sequence number.
Is this approach sclable ?
Can we proceed by this approach ?
Thanks in advance
Srinivas

As long as you are in EJB, synchronization won't help you because it is not permitted by the EJB spec.
If you can go with JDBC 3.0 / Java 1.4, the statement interface supportes generated keys. See http://java.sun.com/j2se/1.4/docs/api/java/sql/Statement.html.
If you cannot go with JDBC 3.0 / Java 1.4, you can implement the key-generation db-specific (e.g. using oracle sequences for oracle tables, and whatever exists for DB2, SQL Server etc.) That of course requires special support for all databases, but at least you can run your app with different databases.
Or you can try to do it the following way, using a separate table for the keys.
ResultSet rs = statement.executeQuery("select id from mySequences");
oldId = rs.getInt(1);
newId = oldId + 1
int updatedRows = statement.executeQuery("update mySequences set id = newId where id = oldId");
if(updatedRows == 1) {
// succesful
} else {
// not sucessful, somebody else has already retrieve this id; do something like Thread.sleep() and retry
}This way, the database does the actual synchronization between the processes (each process sees the same data in the tables), and you implement the retry logic.

Master-detail with auto-generated primary key(master)

Hello,
I have the following master-detail setup:
Master - block A primary key is: codeA
Detail - block B
codeA is genrated only at commit time and is obtained from a sequence.
User needs to add detail records. This is easy to do since he has to click on the insert icon on the toolbar. At commit time, use commit_form.
Prob: the requirements as asked by the client is to add a button (which we will label INSERT DETAIL). When the user click on the button, it opens a window where he can enter the detail info then click on save. This should bring him back to the master-detail form and the record in the detail block is inserted.
What is the problem here ? since the detail block has the foreign key tied to the master primary key, the window-form (with the call_form) that we opened for the detail entry won't be able to save since at this point we still have not assigned a value for the primary key (and hence a value for the foreign key).
Possible Suggestions:
-Use a temp database table to hold the detail record from the second form and use it to transfer values to the detail record in the master-detail
-Use a global record group
-We can't use parameter list to pass back these values.
So my question is:
What would be the most efficient way to have an insert button on the detail block that would allow the user to have a pop up where he can insert his values and then be brought back to the master-detail.
Thanks.

Hello again,
May be I was not clear enough.
Scenario 1: We use the master-detail form as is with the default oolbar. In this case, the user can insert the detail records one by one without needing the primary-foreign key value since this is handled by default.
Once we save the form (commit_form), I use the pre-insert trigger to get the master block primary key generated from the sequence and since the detail block key is copied from this value, both are saved correctly and it is the end of the story.
Scenario 2: As explained in the initial post, the user will populate the detail records one by one by clicking on the -INSERT DETAIL- button and hence has a window where he can insert the detail info and then be brought back to the master-detail form every time he enters a new detail record.
The problem here is that I can't generate the primary key for the master block since the client has the following requirement:
The user can always change his mind and not complete, meaning save the form, his process
As such, the key should be generated in the last step before Commit.

How generate primary key atumatically in jdeveloper 10g

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