Generic Reports accessing Multiple Database Servers

Hi,I have a report which is accessing a table present within SQL Server. This is done by creating a system DSN which points to SQL Server at report design time through the database expert from the Crystal Reports Developer. The same table is also present in another database server ie ORACLE. The requirement is that I should be able to execute the report against ORACLE database at runtime. I have seen a lot of examples to do this using ODBC and OLEDB ie changing datasources at runtime but all of these have to specify the database username and password at runtime. Is there any way for me to achieve this without passing the username and password at runtime? If so it would be great if i could get all possible approaches to achieve this. Thanks in advanceJoseph Samuel

I am doing the samething.
I found that if the report is created under OS Auth mode of Oracle, then it is OK in integrated security mode in runtime, you don't need to set any logon information in runtime, but sure, please follow the OS Auth requirement of Oracle.
But if the report is created using stand security mode and wish it to be run under integrated security mode in runtime, then a logon error would occurs, but if the crystal report view control set to enable the database logon promot, then we can still enter something in username textbox and check the "use integrated security" checkbox, then the report is still OK.
I wish to have the database logon prompt disable and override the logon information in program in runtime and let the report shown without any problem, but up to now, i still have no any idea. I will come back after I got any solution for this.

Similar Messages

Using Single Datasource to Access Multiple Databases

Hi,
We would like to know the pros and cons of accessing multiple
databases through a single datasource, versus accessing each
database through its own datasource. Our environment includes
multiple web servers w/ the latest version of ColdFusion MX 7,
clustered through a load balancer. Each web server has 800+ dsns
pointing to different SQL databases on the same SQL server. We have
noticed that the ColdFusion administrator is taking a long time to
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Another problem is that sometimes the neo-query file gets corrupted
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Because of the issues above we are researching the
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In the example above, obviously #dbname# would be a variable
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Here is my opinion, because I work with both schemas. The
main advantage to use one datasource for all DBs in a SQL Server is
the simplicity of administration.
But the main disadvantage is security, because you are using
a single user to access all DB in a server, you don't have
isolation, and a user that knows your schema can access data of
other DBs that he sould not be authorized.
Another issue is is a user must access 2 differents DB with
different permissions (a DB only read and the other read/write),
you'll have to create another datasource, user, etc for it.
But the decision depends in the enviroment. If you are a
hosting company, I would use 1 datasource for user or DB. If the
servers and DBs are of the same company, I could use one datasource
for each SQL server.
Best regards

Multiple Database Servers Question

Hi,
Please forgive this ignorant question, but can someone tell
me how one would go about using multiple database servers?
Just as there comes a time where one would need more than
one web server and would need to use a load balancing
solution, what happens when one would need more than one
Database Server?
How does one go about implementing that solution?
Is there some way to have two database servers carrying the
same information with some kind of load balancing solution
in front of it(?) or does one place some tables on one
Database
server, and other tables on the other database server?
(I have no clue as to how things would work.)
Thanks in advance,
Joe

Microsoft SQL allows for clustering of SQL databases, so for
instance two servers connected to a fileshare and a virtual address
shared across the two physical boxes. Database connections are made
to the virtual addres which will then be handled by the active
node. Becuase a database is ultimately a file(s) on a disk it can
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How to generate a single report using multiple Databases

Hi All
Is it possible to create a single report using multiple databases
I am working on Database A to generate reports usually,, but now i have a second database for which the data is coming from flat files now i have to use few tables from
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Hi,
i didn't see this properly in your post:
but now i have a second database for which the data is coming from flat files if you have ETL then make flat files as source then create target tables in db:B itself.. .Now, import them in the rpd..
If not, import both those tables into rpd with different connections..
Create physical joins by selecting those tables and perform joins operations over db's in physical layer..

1 user license access multiple database

Hi all...
I have a question :
In SAP B1 8.8, can 1 user license (for 1 physical user) access multiple databases?
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Hi Ingrid,
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<ultra - said it once>

Accessing Multiple Databases

I have a requirement in which I will need to use the same classes to
access different databases. In other words, let's say I have a Person
class. I'd like to use the enhanced Person class to pull people from a
SQL Server database, and an Oracle database.
The documentation mentions that you can access multiple databases by using
different kodo.properties files with different names. However, it doesn't
mention using different mappings, that I can see.
What I'm thinking I could do is extend kodo.jdbc.meta.FileMappingFactory.
Then I could have a .mapping file for each different database. My
extension would just need to know to access *.sqlserver.mapping or
*.oracle.mapping for instance.
Is this plausible? If so, any hints on extending FileMappingFactory? How
is that guy determining the name of the mapping file? Can I simply
override a method?
I'm hoping this will work, so that I don't have to create a
SQLServerPerson and an OraclePerson. Any ideas appreciated.
Thanks,
Steve

Ok, in answer to my own question, I'm providing the following which I hope
Abe or Stephen will look at, and tell me this won't break everything.
It seems that jdbc-class-ind is only read at the base level, and thus I
couldn't add an "indicator" for each of my subclasses. So, as I wrote
previously, I needed a way to read my jdbc-class-ind-value in my .mapping
file for each class. Here is the code I came up with:
<code>
public class MyFileMappingFactory extends FileMappingFactory {
JDBCConfiguration myConfiguration = null;
static Logger log = Logger.getLogger(MyFileMappingFactory.class);
public synchronized void readMapping(ClassMetaData type,
MappingInfoRepository repos) {
super.readMapping(type,repos);
try {
String[] persistentClasses =
myConfiguration.getPersistentClassesList();
MappingRepository mappingRepos =
myConfiguration.getMappingRepository ();
for (int i=0;i<persistentClasses.length;i++) {
String className = persistentClasses;
try {
Class clazz = Class.forName(className);
ClassMapping mapping = mappingRepos.getMapping(
clazz, clazz.getClassLoader(), true);
mapping.addExtension(
"jdbc-class-ind-value",
mapping.getMappingInfo().getAttribute("jdbc-class-ind-value"));
catch (Exception e) {
log.error("Could not set jdbc-class-ind-value for class '" +
className + "'.");
catch (Exception ex) {
public void setConfiguration(Configuration conf)
myConfiguration = (JDBCConfiguration) conf;
super.setConfiguration(conf);
</code>
I did a lot of introspection using JBuilder as well as the Javadoc to
figure out what I needed to call. Basically, I need to have
kodo.PersistentClasses set in my config file, and I added an attribute to
the .mapping jdbc-class-map element. Finally, my kodo.properties has to
point to my custom MappingFactory.
It all seems to work, but I wanted to verify with the experts I'm not
breaking anything. I had hoped to figure out how to put an <extension> in
the .mapping file so that it stood out even more as being "custom code",
but could not figure out how to read such an element.
Steven Kouri wrote:
I think you've answered my question, but it doesn't help my problem. I
actually did both: I loaded the static classes in my code as well as used
the kodo.PersistentClasses property. Neither helped this situation.
The reason it seems is when the fromMapping() gets called. It only got
called after calling execute() on my query. Thus, the rest of my mappings
hadn't been loaded yet. I put a breakpoint in fromMapping(), and here was
my stack trace:
execute()
executeWithArray()
executeWithMap()
internalCompile()
getMetaDatas()
getMappings()
getMapping()
getMappingInternal()
getMapping()
getMappingInternal()
intialize()
fromMapping()
So, I need to figure out a way to get my code to read all the mappings
before I do an execute(). I think. :) I'll investigate further unless
you can give me a pointer in the right direction.
Thanks!
Steve
PS: 1pm? 1PM? I'm here before 7am! But then, I usually leave at 4pm. :)
Abe White wrote:
Is the .mapping file preparsed, or is it only accessed when a class is
requested from the datastore?
We only resolve mappings when the classes are actually used. Have you
listed all your persistent classes in the kodo.PersistentClasses
configuration property, as suggested by the documentation for
MetadataValueIndicator?
PS: It's 5:37pm on a Friday. I'm going home. You should too! :)
When you decide to start work at 1pm, you tend to stick around a little
later.

How to access multiple database present in single instance

Hi Team,
In oracle 11.2, can there be multiple databases in an instance??? In one of our environment, I could see multiple databases in an instance. Could you please help me in giving the data dictionary or query to access those databases?
Actually, querying v$database, I could see only one database which is same as instance name. But in inventory, there are multiple database in an instance?
I am still not exactly clear about this. Can someone help me with this?
Thanks!
Vidhya

In Oracle one instance manages one (1) database. A database consists of multiple *schemas*.
Other vendors erroneously call a schema 'database'.
So, no, you didn't see multiple databases.
There is also one datadictionary, consisting of a set of views.
All views beginning with dba_ list the entire database, all schemas.
All views beginning with all_ list the objects you have access to.
All views beginning with user_ list your own objects.
The view DICT show you the contents of the datadictionary.
Oracle also has online documentation at http://docs.oracle.com
From your question it is clear you should read the document called the 'Oracle Concepts Manual'.
You can find all documentation for 11gR2 here Oracle Database Online Documentation 11g Release 2 (11.2)
Too many people here don't make any effort to read it. This is probably the reason why you got no response.
Sybrand Bakker
Senior Oracle DBA

Installing one APEX for multiple databases servers.

Hello, everyone.
I'm new on this world of Oracle solutions, and I would like
very much your help.
Here in my company I have five database servers, and I want to install
the Oracle Apex in a way that I only need access one webpage and have
the possibility to edit all the database.
For instance:
Imagine that I have five machines and each one has a instance of one database.
I would instal the Apex on each machine. But I would like to open the Apex on
my browser only once, and have the capability to work with all databases.
It would be like the Apex had a scrollbar and I could choose wich database to work.
Is that possible? If it is, could be done with XML DB server? What is the best HTTP server to use in this case?
Thanks for your attention.
Sorry if I wasn't clear, I'm new and I'm learning.
Regards, Leandro R. de Freitas.

Hi,
as you describe this, it is not possible. An Apex instance is installed in an Oracle instance and is as a result is tied very closely to that instance.
That being said, it is still possible to access data in different database instances from a seperate database by the use of database links, though this is can be a little complicated and not always desirable from a performance point of view. Whether this is desirable in your instance depends on the architecture of your applications.
For example, if your 5 different instances are part of one distributed application, it may be desirable to install Apex in one instance that may be termed the master instance and have it access data from the other instances via database links, which should already exist in a distributed application.
On the other hand, if your applications are quite distinct, then I would see it as desirable to have seperate installations of Apex in each instance. This would enable different release cycles and versioning if required, lead towards better performance and avoid single point of failure. If you need a united front end to these applications then you could maybe create a gateway application on one of the Apex instances, though how you deal with sign on would depend on your architecture eg Single Sign on vs LDAP etc. You could simply create an HTML page somewhere on your intranet that points to these applications and then let each application deal with sign on.
I hope this helps.
Andre

How to Connect crystal report with multiple databases?

I Think my question is really clear
I ask this because i think i already used every way logic in my head
ConnectionInfo
IConnectionInfo
PropertyBag
DataDefModel
Etc
i found Ludek's post about "Ras Connection Info Code" i think this will solve my case but still no luck
Dear Ludek i try your suggestion from here Until the "Ras Connection Info Code" give an Error
See the end of this message for details on invoking
just-in-time (JIT) debugging instead of this dialog box.
************** Exception Text **************
System.IndexOutOfRangeException: Index was outside the bounds of the array.
 at CodeBuilder_RasConnectionInfo.frmRasConnectionInfo.VBConnectionCode(ReportDocument boReportDocument) in C:\Reza\Development\CodeBuilder-RasConnectionInfo\Form1.vb:line 183
 at CodeBuilder_RasConnectionInfo.frmRasConnectionInfo.btnLoadReport_Click(Object sender, EventArgs e) in C:\Reza\Development\CodeBuilder-RasConnectionInfo\Form1.vb:line 16
 at System.Windows.Forms.Control.OnClick(EventArgs e)
 at System.Windows.Forms.Button.OnClick(EventArgs e)
 at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
 at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
 at System.Windows.Forms.Control.WndProc(Message& m)
 at System.Windows.Forms.ButtonBase.WndProc(Message& m)
 at System.Windows.Forms.Button.WndProc(Message& m)
 at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
 at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
 at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
************** Loaded Assemblies **************
mscorlib
 Assembly Version: 2.0.0.0
 Win32 Version: 2.0.50727.4927 (NetFXspW7.050727-4900)
 CodeBase: file:///C:/Windows/Microsoft.NET/Framework/v2.0.50727/mscorlib.dll
CodeBuilder-RasConnectionInfo
 Assembly Version: 1.0.0.0
 Win32 Version: 1.0.0.0
 CodeBase: file:///C:/Reza/Development/CodeBuilder-RasConnectionInfo/bin/Debug/CodeBuilder-RasConnectionInfo.exe
Microsoft.VisualBasic
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System
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System.Windows.Forms
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System.Drawing
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System.Configuration
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CrystalDecisions.CrystalReports.Engine
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CrystalDecisions.Shared
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************** JIT Debugging **************
To enable just-in-time (JIT) debugging, the .config file for this
application or computer (machine.config) must have the
jitDebugging value set in the system.windows.forms section.
The application must also be compiled with debugging
enabled.
For example:
<configuration>
 <system.windows.forms jitDebugging="true" />
</configuration>
When JIT debugging is enabled, any unhandled exception
will be sent to the JIT debugger registered on the computer
rather than be handled by this dialog box.
i don't know what happen
is there any way to solve my case??
actually i only need 3 databases connected in my report
in each databases i insert about 3 - 8 command
i'm using VS2010 Ultimate
CR Version=13.0.2000.0 (ASP.Net)
SQL Server Standard Edition 10.50.2500.0
and
SQL Server Standard Edition 10.50.1600.1 to test move the datasources
can someone give me an enlightment about my case
every suggestion would be great
Thanks
Zeal

Just as an FYI. there is a utility that will actually write the code out for you. See KBA 1553921 - Is there a utility that would help in writing database logon code?
- Ludek
Senior Support Engineer AGS Product Support, Global Support Center Canada
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Determine connection status of multiple database servers

We have mutliple database servers that MAY/MAY NOT be connected to the network at any time. I need to determine which DB servers are available to connect to. I have a stored procedure that does a HOST TNSPING command and checking the results through the FORM_SUCCESS function. That works but the response time is too slow, due to taking too long to timeout. What we attempted to do was to issue a HOST PING command, but because of the 16 bit factor, the FORM_SUCCESS did not recognize the results of the PING. I tried to capture the results of a PING into a variable, but had no success. Bottom line, we don't care how it gets done, we just need to be able to determine, as quickly as possible, what database servers are connected.

Microsoft SQL allows for clustering of SQL databases, so for
instance two servers connected to a fileshare and a virtual address
shared across the two physical boxes. Database connections are made
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node. Becuase a database is ultimately a file(s) on a disk it can
only be attached to one node at a time so you end up with an
active/inactive cluster.

ADF app, single deployment - possible to access multiple databases?

Hi,
I am writing an ADF app that I'd like to connect to multiple different databases. In other words the app will be deployed once on a Weblogic server and will use a parameter to connect to the appropriate database for each user session. Ideally there will be no hard coded connection details embedded within the app before it is deployed, the different potential connections should be able to be administered on the app server.
I have been looking at Dynamic JDBC Credentials and understand it is used to connect to different database users - can it also be used to connect to different databases?
Alternately, is there a way to switch between different JDBC Datasources at runtime?
ADF/Jdeveloper 11.1.1.3, WLS 10.3.3.
Cheers,
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Here is my opinion, because I work with both schemas. The
main advantage to use one datasource for all DBs in a SQL Server is
the simplicity of administration.
But the main disadvantage is security, because you are using
a single user to access all DB in a server, you don't have
isolation, and a user that knows your schema can access data of
other DBs that he sould not be authorized.
Another issue is is a user must access 2 differents DB with
different permissions (a DB only read and the other read/write),
you'll have to create another datasource, user, etc for it.
But the decision depends in the enviroment. If you are a
hosting company, I would use 1 datasource for user or DB. If the
servers and DBs are of the same company, I could use one datasource
for each SQL server.
Best regards

How to access variuus database servers at the same time.

Hi All,
Here, i've to access more than one databse servers at the same time.
i've to fetch some data from AS400, and some from MS-Access and SQL-server. The problem is this should be done at the same time.
What should i do. Plz. help.
Thx. in advance.

what is exactly "at the same time"
what could prevent you from opening multiple connections?

Oracle dblink to sql server, accessing multiple database on same sql server under one dblink

Hi, we have successfully managed to set up an Oracle dblink over to sql server and retrieve data.
The sql server user were using via the dblink has access to more than one database on the same sql server
But the question is how in oracle (if at all possible) do you prefix the sql statement to access this ?
Eg:
Sqlserver_prod has user sqlserver_user which appears to be set up as default database on sqlserver_db1
But we have select access to sqlserver_db2
all work fine as sqlserver_user
select * from table_fromdb1
select * from dbo.table_fromdb1
select * from sqlserver_db1.dbo.table_fromdb1
as does
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over in Oracle
Oracle_db has dblink sqlserver_prod.world connecting as sqlserver_user
all working fine
select * from "table_fromdb1"@sqlserver_prod
select * from "dbo"."table_fromdb1"@sqlserver_prod
but how (if at all possible) do I access from oracle
sqlserver_db2.dbo.table_fromdb2
without having to create a new sqlserver_db2_user referenced in a new dblink
if oracle to oracle would be
select * from remote_oracle_schema.table@remote_oracle_db

Hi, ok cheers, I see, original gateway was connecting purely at host_name level
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Planning to amend this to be
HS_FDS_CONNECT_INFO=sqlserver_host//sqlserver_db1
With exisiting dblink
And to create new gateway
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With new exisitng dblink,will see how we get on
Cheers again

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Hi List;
We have an environment where we have needs to provide cross database visibility between Oracle, Sql Server and PostgreSQL. So we need the capability for Oracle to query PostgreSQL and Sql Server tables, PostgreSQL must be able to query Oracle and Sql Server tables and Sql Server must be able to query Oracle and PostgreSQL tables.
I'm thinking that we can implement stored procs which are either written in java or call a java process . The java code in turn should be able to connect to any DBMS desired via JDBC query the tables in question and return the result set to the calling database.
Any thoughts on how feasable this is would be appreciated. Does this seem like a solid solution? Any initial concerns or red flags? what about performance via JDBC?
Thanks in advance for your help.

John,
from your description I understand that you essentially program the VO yourself. So I suggest that you read chapter 35.9 of the 'Fusion Developer’s Guide for Oracle Application Development Framework' (I guess you know where to find it). Since you still call the actual SQL not all of the chapter apply, but you get the idea how it works.
And yes you analyzed the behavior correct. executeQueryForCollection() is allways called bevore getQueryHitCount().
Timo

Designer 6i accessing multiple database

Hi
I have just installed Des6i and a repository in a particular Oracle 8i DataBase on Windows 2000. I would like to acess other Database (on Linux) with the same Designer and Repository. Is it possible?
It seems that I have to install one repository per Database. Am I wrong somewhere?

It's like client-server. Client is your Designer and repository is a server part.
And granted users can use your repository and you can use several repositories(with diferent conectstring).
null

Generic Reports accessing Multiple Database Servers

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