JPA and Database Views

hi ,
How can i represent my DataBase View in JPA , and since each "Entity" should have an "@Id" how can i handle this on my views since some of them does not have a convenient ID field/fields , Thanks

In this situation I created @Id for one of the columns or created @IdClass from all view fields.

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JPA and Database View.

Hi people...
I working with JPA and Hibernate and i have a View in my Database and i need to map this View. It's this possible? Some have an example to show me?.
Thanks!

I hope this link help you
http://forums.java.net/jive/message.jspa?messageID=244187
I�m having a similar problem, I�m developing using JPA and now I need to bring values from some views on database but I still don�t know how.I�m still Java jr and I didn�t understand clearly but I guess that the link can help you, and if it�s true please explain me.

View on "Transparent Table and DataBase View" ????

Hi
I have three transparent tables and four database views in R/3.
Is it possible to create the view on "Transparent Table and DataBase View". Please let me know
kumar

no it's not possible.

Business Components and Database Views - Trouble Creating

I am trying to create a business component that contains a View that I created in my database. When I get to the fnnal step of creating the business component and it begins to generate the XML and Java code, it bombs out and says that the view object does not support ROWID. I just need to select only GridControl of this view.
Any suggestions/help would be appreciated. I could not find any info in the JDeveloper help.
null

Some options:
[list]
[*]Create the entity using the Entity Wizard instead of reverse engineering it from a table. In the entity wizard you can specify the table/view name, then indicate which attribute should function as the primary key.
[*]Don't bother creating an entity object for this view. You can just create a view object with an "expert mode" query that selects against your database view. It does not need an entity object. Note, however, that without an associated entity you won't get "uniquing" of entity level values, so if another view object being used by the same use changes the data that this grid is showing, the updates won't be automatically synchronized if you go this route.
[list]

Diff between maintence and database views

pls answer now,its urgent

Hi
Database Views
Data about an application object is often distributed on several database tables. A database view provides an application-specific view on such distributed data.
Database views are defined in the ABAP Dictionary. A database view is automatically created in the underlying database when it is activated.
Application programs can access the data of a database view using the database interface. You can access the data in ABAP programs with both OPEN SQL and NATIVE SQL. However, the data is actually selected in the database. Since the join operation is executed in the database in this case, you can minimize the number of database accesses in this way. Database views implement an inner join (see Inner and Outer Join).
If the database view only contains a single table, the maintenance status can be used to determine if data records can also be inserted with the view. If the database view contains more than one table, you can only read the data.
Database views should be created if want to select logically connected data from different tables simultaneously. Selection with a database view is generally faster than access to individual tables. When selecting with views, you should also ensure that there are suitable indexes on the tables contained in the view.
Maintenance View:
Maintenance views offer easy ways to maintain complex application objects.
Data distributed on several tables often forms a logical unit, for example an application object, for the user. You want to be able to display, modify and create the data of such an application object together. Normally the user is not interested in the technical implementation of the application object, that is in the distribution of the data on several tables.
A maintenance view permits you to maintain the data of an application object together. The data is automatically distributed in the underlying database tables. The maintenance status determines which accesses to the data of the underlying tables are possible with the maintenance view.
All the tables in a maintenance view must be linked with foreign keys, that is the join conditions for maintenance views are always derived from the foreign key You cannot directly enter the join conditions as for database views.
There are some restrictions for the attributes of the foreign keys with which the tables in a maintenance view can be linked
A standardized table maintenance transaction is provided (SM30), permitting you to maintain the data from the base tables of a maintenance view together.
Maintenance mechanisms, like screens and processing programs, must be created from the view definition with the transaction Generate Table View (SE54). This makes it possible to create easy-to-use maintenance interfaces in a simple manner.
If it is helpful rewards points
Reagards
Pratap.M

JDeveloper 3.0 and Database-Views

I have started to test JDeveloper and have the first problem.
I make extensive use of database-saved views and started with the Package Wizard to create default business-objects (view objects and view links).
But when I select a database-view I get a save error: Entity creation failed no primary key attributes and does not support ROWID. oracle.jbo.dt.objects.Jbo.Exception
The connection was established with jdbc.oracle.thin, the database is NT-Version 7.3.4, JDeveloper is Version 3.0 (Build 532).
What have I done wrong or is it not possible to connect to views ???
I hope for your help.
Henry
null

Dan,
JDeveloper 3.0 provides an 'Add-In API' and 'Custom Addins' for
integration with third-party vendors. These were also in place
for 2.0.
If you go to the JDeveloper page, there are HTML documents
available under the 2.0 Technical Information section, and also
an online walkthrough available if you follow the 'Online Demo'
link.
Laura
Dan Schroeder (guest) wrote:
: Will JDeveloper 3.0 support source control integration? I am
: currently MKS Source Integerty 7.5. I haven't seen any
: references about source control within JDeveloper 3.0.482, but
: someone told me that it may be available as an add on.
null

JPA and database error handling

Can anyone point me towards any information or discussions on methods of handling database initiated exceptions with JPA? Specifically, I'm trying to handle common data exceptions, like primary/foreign key violations etc., so I don't have to duplicate that level of data integrity checking in my business logic.
It seems I can only get hold of a RollbackException if something goes wrong. Ok, I can get into the underlying cause easily enough, but then I'm straight into implementation specific stuff (in my case, Hibernate exceptions). Are there any good techniques/patterns to reduce this dependency to an absolute minimum?

In this situation I created @Id for one of the columns or created @IdClass from all view fields.

DB Connect and Database Views

Hello,
I am writing a function module to access an external Oracle database that has been defined in our ABAP system using DBConnect.
I would like to use Open SQL instead of Native SQL to access the data in the remote table. Is this possible? I believe that in order to do this, a view of the remote table would have to be defined in the ABAP data dictionary via SE11, but I am unable to do this.
Does anyone know if this is possible, or am I required to use Native SQL when accessing an external database?
Regards,
-Matt Schababerle

Hi,
Chek out these two links.
It would be helpful:
Access external Oracle database with ABAP
external oracle database connection
Regards,
Anjali

Hi, difference between database view and elementary search help

hi
pl. can any one tell me the difference between
database view and elementary search help,
and help view and elementary search help,
and database view and help view.
in the output i do not see any difference.
thanx.
rocky robo

HI
An entire table can be included in a database view. In this case all the fields of the included table will become fields of the view (whereby you can explicitly exclude certain fields). If new fields are included in the table or existing fields are deleted, the view is automatically adjusted to this change.
Database view:
<a href="http://help.sap.com/saphelp_nw04/helpdata/en/36/74c0358373003ee10000009b38f839/frameset.htm">http://help.sap.com/saphelp_nw04/helpdata/en/36/74c0358373003ee10000009b38f839/frameset.htm</a>
Elementary search help:
<a href="http://help.sap.com/saphelp_nw04/helpdata/en/cf/21ee38446011d189700000e8322d00/frameset.htm">http://help.sap.com/saphelp_nw04/helpdata/en/cf/21ee38446011d189700000e8322d00/frameset.htm</a>
<a href="http://help.sap.com/saphelp_nw04/helpdata/en/8b/415d363640933fe10000009b38f839/frameset.htm">http://help.sap.com/saphelp_nw04/helpdata/en/8b/415d363640933fe10000009b38f839/frameset.htm</a>
Help view:
Help views are used if a view with an outer join is needed as selection method in a search help.
<a href="http://help.sap.com/saphelp_nw04/helpdata/en/42/81c1351181b73fe10000009b38f839/frameset.htm">http://help.sap.com/saphelp_nw04/helpdata/en/42/81c1351181b73fe10000009b38f839/frameset.htm</a>
Regards,
Gunasree

Difference between Database view and Table

Hi there,
Can anyone tell me the difference between Database view and Table.
Will the Database view query be more faster than a database table?

Tables and database views can be defined in the ABAP Dictionary.
These objects are created in the underlying database with this definition. Changes in the definition of a table or database view are also automatically made in the database.
Data from several tables can be combined in a meaningful way using a view (join).
You can also hide information that is of no interest to you (projection) or only display
those data records that satisfy certain conditions (selection).
Database views implement an inner join. You only get those records which have an
entry in all the tables included in the view.
in views db modifications are not possible
views only contain data at run time
when they consult the database
in case of views the join definitions are already sstored in the database itself
whereas join as open sql is a query to oracle database as similar select statements
Views are optimized by SAP and stored in the repository while Joins
are in reports that needs to be compiled at every execution
Reward if helps
Regards,
Senthil
Message was edited by: senthil kumar

Z Database view is not showing all the entries?

Hello
Last year I have created a Z table, say, its name is Z_TABL_1, its working fine, say, there is around 1000 entries in PRD, well
Last week I have created another 2nd Z table, its name is Z_TABLE_2, now it has 50 entries in PRD
In both tables the key field os the same (VISITOR_NUMBER) and there is only one key field in both tables, its the same
When creating the 2nd table I forgot to specify the CHECK table relationship in 2nd table refering 1st table, I mean, dependent table is 2nd whereas reference is 1st table
Now, I created a database view, say, my_db_view on these 2 tables.
When I opened this my_db_view in SE16, I expected 1000 (this 1st table count) entries, but am seeing just 50 (the 2nd table has only 50 entries) entries!!
Pls. let me know how can I view all the 1000 entries in SE16 for my_db_view?
Thank you

Hi,
in your DB view tables are joined and database views implement an inner join (you can check here: http://help.sap.com/saphelp_nw04s/helpdata/en/cf/21ecab446011d189700000e8322d00/content.htm), that's why the system extracts only 50 records.
It's not possible to have all the 1000 records using a database view.
Marco

Universes versus database views

why would we use universes versus database views to store sql/formulas/calculations (other than the fact WEBI has to use it)? this is assuming crystal reports only

Kevin,
I am a big supporter of using Crystal Reports. I've been using Crystal for a while.
However, there is a difference between using universes and database views. I tend to use stored procedures more than I would a database view just because it is using the compiled code. However, if you use a database view and need to add a command, you will get a plain dialog box asking for SQL and parameters.
If you are using a universe and add a command, you are going to get the Business Objects query panel. With this query panel, you can add a combined query, add a sub query, look at the SQL, add fields, set whether you want to see unique values and designate how many rows are returned.
All this can be done using SQL. However, the difference is for those that can't access the database when they want. They would have to have permissions (and the know how) to modify the database view as they want or create a new one. If a universe has been set up for them, they can manipulate the universe as they want.
If order to use a database view and add a command, you would have to know the SQL pretty well to do the same things. Not a pretty GUI to use.
Hope that helps.
Glenn

HR transactions and functionality and creation of Database view

Hi Guys
    I am new to HR module . can anybody send me the list of transaction codes with HR functionalities.
I also have to made a database view from hrp1001 and hrp1010 table to list all chief positions who are head of business group , Business unit , Site etc .
Could you help me in creating this databse view.

Hi,
These are HR Infotypes
0000    Events
0001    Org assignment
0002    Personal info
0003    Payroll data
0007    Work time
0008    Basic pay
0014    Reoccurring pay
0015   1 X pay
0027   Cost Center
0041   Event Dates
0057   Membership dues
0165   Over ride to limits on deductions
0167   Health
0168   Insurance
0169   Savings
0170   Spending
0194   Garnishment reduction
0195   Garnishment order
0207   Residence Tax
0208   Work Tax
0209   Unemployment Tax
0210   Withholding
0216   Garnishment adjustment
0221   Adjustment
0267   Off cycle
2005   OT
2010   Catts direct to cluster
1000   Infotypes 1000 1999 are PD Relationship infotypes
Logical Database (PNP) ·
Programming with Infotypes ·
Processing Time infotypes/Cluster ·
Processing Payroll infotypes/Cluster
In OM level hrp 1001 and 1010 will be there.
If u want total transactions goto SE11->TSTC Table.
****POINTS TO BE CONSIDERD
Thanks
P.SRIKANTH

Developing database views between Oracle and SQL Server tables

I am on Oracle 10.2, my organization has many SQL Server databases as well and has now made
SQL server as company standard so many new databases will be developed in SQL Server. It is of course
not possible to convert all Oracle databases to SQL Server, so a mix environment will exist. Two questions:
1. Is it possible to develop database views in Oracle (10g in my case) which join Oracle tables with tables in SQL Server 2008? If yes, how. I have seen some heterogeneous connectivity setup to connect SQL Server to Oracle, but not sure whether it is possible to develop a database view across two databases.
2. I know it is not a SQL Server forum, but many DBA’s know both Oracle and SQL Server. Is it possible to develop views in SQL Server (SQL Server 2008 R2 in my case) which join Oracle 10g and SQL Server 2008 tables? I know in SQL Server, there is way to set up linked servers, but do not know whether it is possible to develop views.
Thanks a lot for your insight.

You can create views that join local Oracle tables and remote SQL Server tables. I'm pretty sure you can do the reverse as well but I haven't personally done it.
However, I would be very concerned about the performance you'd get if you created that sort of view. You'd very frequently end up in a situation where Oracle has to pull all the data in the remote table across the database link in order to apply predicates and join the data locally. That could be disastrous from a performance standpoint.
Justin

Database Views and Master-Detail using ADF

How would I create a master-detail form using a database view for the search-able master table and a database view as the detail table?
The detail-view will need to be update-able (adf-table) using an instead-of trigger to perform the updates to the database table.
Thanks in advance...

There are several sections in the ADF Developer's Guide about using views (http://www.oracle.com/technology/documentation/jdev/b25947_01/index.html):
- 26.4 Basing an Entity Object on a PL/SQL Package API
- 6.2.4 Creating an Entity Object for a Synonym or View
You can also try Steve Muench's web log: http://radio.weblogs.com/0118231/stories/2004/09/23/notYetDocumentedAdfSampleApplications.html
There are at least two (old) items there that involve view with instead-off triggers:
- Composite Entity Using Stored Procedure API to Create/Modify/Remove Master and Children
- Entity Object Based on View With Instead Of Triggers Avoiding Returning Into Clause
Jan Kettenis

JPA and Database Views

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