Calling external C code from the database

Hi,
We have an external routine written in C which we want to reuse. I have run this using external procedure call but as expected extproc processing is very slow. The routine cannot be rewritten, it is a "black box" component. We have considered wrapping the call to C in a Java procedure using JNI and installing the java inside the database to run inside the oracle jvm. Does anyone know if this will work or has any experience of using JNI inside the database? Is this supported by Oracle? Does anyone have any ideas/advice for tuning extproc calls or other alternatives to suggest for calling C from inside the database.
Thanks

Thanks for the advice. I did notice the support comment in the documentation - pretty much kills that idea then! Bulk processing might be difficult. The external procedure works on two values, one taken from the environment and one from a value embedded in each row of a table...the function is called once for each row and returns a value which i then use within a context and drives visibility, or not, of the row through Virtual Private Database configuration. So when an operator runs "Select * from a_table" the VPD adds in "and/where this_row_is_visible". Both the row value and operator environment value are updateable in real time so I cannot "process" the data first. Sounds like I need to set expectations here!
Thanks

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hi
yes i got some entries in SM50 with w at the left
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Please Mark This As Answer if it solved your issue
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Visakh
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Hi,
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Running:
CR 2008 SP2
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Failed to retrieve data from the database. Details: [Database Vendor Code: 997 ]

Post Author: aya
CA Forum: Crystal Reports
Hi I am getting following problem while launching Crystal Report
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Post Author: pvierheilig
CA Forum: Crystal Reports
Have you been able to resolve this yet? I don't have any reference to Oracle error codes but would suspect a quick Google of something like 'Oracle error code 997' should result in good information, since it is an Oracle error...
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Failed to retrieve data from the database.---- Error code:-2147482925

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Not enough info.
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Sincerely,
Ted Ueda

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Failed to retrieve data from the database. Details: [Database Vendor Code:
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Invoking external C code from Oracle

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What is the API to this C code?
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I'm also facing problem in running the example on the page http://www.oracle.com/technology/sample_code/tech/java/jsp/samples/wsclient/Readme.html
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exiting : Failures occurred during processing
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Thanks in advance for any useful help.
-

Crystal Reports - Failed to retrieve data from the database

Hi There,
I'm hoping that somebody can help me.
I've developed a crystal report from a stored procedure which I wrote. I can execute the stored procedure within SQL Server and within the Crystal Reports designer without any errors. Furthermore, I have imported the report into sap and can run it within SAP from the server without any errors. SAP version 8.81 PL5
The issue is that when it's run from a client machine, I get the following error: "Failed to retrieve data from the database. Details: Database Vendor Code: 156. Error in the File RCR10010 {tempfile location}
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- Tested other reports built from stored procedures on client machines to ensure that they work.
Any assistance in this would be GREATLY appreciated.
Thank you

After further testing, we found that the report could be run within SAP on any work station which had the CR designer installed on it.
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To work around this, I installed external runtimes which were the same version of the Crystal Report and now the report can be run within SAP from any workstation which has the external runtimes (and not just the runtimes within the SAP client).
I hope this makes sense.

Calling external C code from the database

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