PL/SQL Stored procedures vs C# code.

Hi All
We are going to start designing a kind of transactional application with huge volume of data (150 million records per month). Our selected DB engine is Oracle 10.g while C# is selected development language.
Because of big volume of data performance is one of the most important factors for us, and the technical design should gain the best level of performance.
What i'm looking for and studing for it is to define which kind of operation shall be done by Stored Procedure which will be written by PL/SQL or by C# classes?
I don't interested in to handle complicated and complex jobs using PL/SQL stored procedures while the performance really deserve it.

Hello,
Well, my philosophy is to leverage the database as much as possible. I have worked with applications that had no "select", "insert", "update" or "delete" statements in them. Instead, stored procedures and functions inside of PL/SQL packages and bodies were used. Some people will argue strongly against that, but I belong to the "thick database" group rather than the "the database is just a persistence layer that I have to deal with" group. To me it makes sense to co-locate the code that works on the data with the data. If you are working with large volumes of data, I find the bulk operations available via PL/SQL to be very handy.
Here's an AskTom thread that deals with this general issue:
http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:12083187196917
Whilst the thread is primarily about Java, you can substitute just about any other language and the meaning will still carry over.
Regards,
Mark

Similar Messages

Unable to use the values returned by a PL/SQL stored procedure in a XSQL page

Hi,
I've been messing around with XML and XSQL in particular. I was trying to write a xsql page to display a report with account totals...I have the following .xsql which calls a PL/SQL stored procedure :
<?xml version="1.0"?>
<xsql:query connection="pfcdm" xmlns:xsql="urn:oracle-xsql">
<xsql:set-session-param name="zasset_total" value="100">
<xsql:dml connection="pfcdm">
rraman.sp_vw_id(zasset_total,zinvm_total,zmkt_val);
</xsql:dml>
</xsql:set-session-param>
select 'Asset total is {@zasset_total}' as "ASSET_TOTAL" from dual
</xsql:query>
My procedure sp_vw_id returns the values that it should. But, I am not sure how to declare variables within a page, and to output the return values. There is very scanty documentation on the usage of <xsql:dml> or <xsql:ref-cursor-function>.
Any response would be greatly appreciated.
Thanks,
Raja

Here is the example from the Oracle9i (complete rewrite) of the XSQL Chapter in our Oracle documentation.
Question
I using <xsql:dml> to call a stored procedure which has one OUT parameter, but I was not able to see any results. The executed code results in the following statement:
<xsql-status action="xsql:dml" rows="0"/>
Answer
You cannot set parameter values by binding them in the position of OUT variables in this release using <xsql:dml>. Only IN parameters are supported for binding. You can create a wrapper procedure that constructs XML elements using the HTP package and then your XSQL page can invoke the wrapper procedure using <xsql:include-owa> instead.
For an example, suppose you had the following procedure:
CREATE OR REPLACE PROCEDURE addmult(arg1 NUMBER,
arg2 NUMBER,
sumval OUT NUMBER,
prodval OUT NUMBER) IS
BEGIN
sumval := arg1 + arg2;
prodval := arg1 * arg2;
END;You could write the following procedure to "wrap" it, taking all of the IN arguments that the procedure above expects, and then "encoding" the OUT values as a little XML datagram that you print to the OWA page buffer:
CREATE OR REPLACE PROCEDURE addmultwrapper(arg1 NUMBER, arg2 NUMBER) IS
sumval NUMBER;
prodval NUMBER;
xml VARCHAR2(2000);
BEGIN
-- Call the procedure with OUT values
addmult(arg1,arg2,sumval,prodval);
-- Then produce XML that encodes the OUT values
xml := '<addmult>'| |
'<sum>'| |sumval| |'</sum>'| |
'<product>'| |prodval| |'</product>'| |
'</addmult>';
-- Print the XML result to the OWA page buffer for return
HTP.P(xml);
END;This way, you can build an XSQL page like this that calls the wrapper procedure:
<page connection="demo" xmlns:xsql="urn:oracle-xsql">
<xsql:include-owa bind-params="arg1 arg2">
BEGIN addmultwrapper(?,?); END;
</xsql:include-owa>
</page>This allows a request like:
http://yourserver.com/addmult.xsql?arg1=30&arg2=45
to return an XML datagram that reflects the OUT values like this:
<page> <addmult><sum>75</sum><product>1350</product></addmult>
</page>

Creating XML report using PL/SQL Stored Procedure

Hi Friends,
I am working on an xml report with the xml source as PL/SQL Stored Procedure.
I am referring the exercise shown in the following link to understand the process:
   http://orclapp.blogspot.com/2012/02/developing-xml-publisher-report-using.html
In the example shown in the above link I could not understand the following:
1) In the following procedure, the out parameter 'retcode' is not used at all.
   What is the importance of this parameter.
    PROCEDURE REPORT (errbuf OUT VARCHAR2, retcode OUT VARCHAR2, p_product_id   IN     NUMBER)
2) After the xml data is prepared and put to 'l_result' Clob variable, the following
    Loop is executed. I am not able to appreciate why the following loop is required.
     LOOP
         EXIT WHEN l_length = l_retrieved;
         IF (l_length - l_retrieved) < 32000
         THEN
            SELECT SUBSTR (l_result, l_retrieved + 1) INTO l_xmlstr FROM DUAL;
            l_retrieved := l_length;
            fnd_file.put_line (fnd_file.output, l_xmlstr);
         ELSE
            SELECT SUBSTR (l_result, l_retrieved + 1, l_offset)
              INTO l_xmlstr
              FROM DUAL;
            l_retrieved := l_retrieved + l_offset;
            fnd_file.put_line (fnd_file.output, l_xmlstr);
         END IF;
     END LOOP;
3) In the example it is not explained how the concurrent program gets the xml data?
   I assume it is written to a file using the following line of code:
    fnd_file.put_line (fnd_file.output, l_xmlstr);
   I would appreciate if anyone can throw some light into my above queries so that I can understand the process clearly.
Thanks & Regards
Hawker

Hi 32000 in the code is a 'safe' size smaller than the max available 32767, the loops purpose is to move through the entire thing in chunks that will be manageable in the limits of the data type.
Btw; if you are in Oracle e-business suite then you can also use Oracle reports very simply to create XML output.
If you have reports developer all you need to do is put raw sql (without any 'artifice' to create XML) in the report SQL and then set the reports output to XML in the program definition in Oracle e-business.
best regards,
Robert.

How to send a Varying Array param to a PL/SQL Stored Procedure from Java

* I am VERY new to jdbc, and even somewhat new to Java
* I'm using Java 1.5, Oracle 10g.
* I need to call the following PL/SQL Stored Procedure from Java:
procedure setEventStatus
i_deQueueStatus in deQueueStatus_type
*deQueueStatus_type is the following (an array of deQueueStatus_OBJ):
CREATE OR REPLACE TYPE deQueueStatus_OBJ as object
eventID number (20),
dequeuestatus varchar2(20)
CREATE OR REPLACE TYPE deQueueStatus_TYPE IS VARYING ARRAY(500) of deQueueStatus_obj
*I have created a Java object as follows:
public class EventQueueDeQueueStatus
     long      eventID;
     String      dequeueStatus;
     EventQueueDeQueueStatus(long eventID, String dequeueStatus)
          this.eventID = eventID;
          this.dequeueStatus = dequeueStatus;
I have an ArrayList of these.
I need to pass this list to the Stored Procedure. How do I create a java.sql.Array so I can call CallableStatement.setArray to set the parameter? Or do I use something else? I have tried setObject with both the ArrayList and also with a primitive array, but got "Invalid Column Type" both times.
Any help would be greatly appreciated. I just got this task today, and I have to make it work by Tuesday :-( !
Thanks,
Kathy

Kathy,
Search the archives of this forum and the JDBC forum for the terms STRUCT and ARRAY and you can find some sample code on the JDBC How-To Documents page and the JDBC Samples which can both be accessed from this page:
http://www.oracle.com/technology/tech/java/sqlj_jdbc/index.html
Good Luck,
Avi.

APEX - accepting OUT variable values from PL/SQL Stored Procedure

I have created a page (Form) which is accepting values text fields.
In the Page Processing section under Processing, I am passing the values to a PL/SQL Stored Procedure, which acts like an API. The procedure contains code to validate the entered data and finally insert the data into the base tables. The procedure also contains OUT variables in the parameter that would return status of processing and any error messages.
Now, my question is, how can I make the page accept these OUT variables from the procedure. What I wish to do is, to capture these messages/processing status from the procedure in the page. For example, if there is a error in the data and the procedure is sending this message in the OUT variable, I need this to be displayed on the page as an error message.
Is this possible in APEX?
Regards,
Santhosh Jose

Hi VC,
I just tried putting the string directly instead of the variable. Its still not giving me the expected results.
HOWEVER, I think the reason was because of the EXCEPTION block in my code. I have an EXCEPTION block to handle exceptions. I commented the WHEN OTHERS section and now the error message is coming on the page.
So what I have done now is as follows: At the point at which the error is expected, I am raising a handled exception. And within the exception handling, I am giving RAISE_APPLICATION_ERROR.
WHEN ex_main_error*
THEN*
p_status := 2;*
p_msg := 'ERROR Stage: '||lc_err_stage||' ERROR Message: '||lc_err_msg;*
RAISE_APPLICATION_ERROR (-20001, p_msg);*
This is working now! Which is very good news. Thanks once again for your help!
Regards,
Santhosh Jose

Help on writing pl/sql stored procedure to accept input in xml format

Hi All,
I need to write a pl.sql stored procedure which would be getting the input as an xml.
The requirement is that xml data recieved in below fashion needs to be inserted to 3 different tables.
The tags under the root node directly needs to be inserted into Table1
The tags under the first element of the root node needs to be inserted into Table2
Can anybody help me on how to write a stored procedure which could take up the below xml as input and insert the data received into 3 different tables.
Any sample code.pointers to achieve this could be of great help.
The structure of the xml would be as follows:
<AssemblyProduct>
<AssemblyHeader>
<Name></Name>
<AssemblyId></AssemblyId>
<ListOfHCSIFFs><HCSIFFHeader><Id></Id> </HCSIFFHeader> </ListOfHCSIFFs>
<ListOfHCSIFFs><HCSIFFHeader><Id></Id> </HCSIFFHeader> </ListOfHCSIFFs>
<ListOfHCSIFFs><HCSIFFHeader><Id></Id> </HCSIFFHeader> </ListOfHCSIFFs>
</AssemblyHeader>
<AssemblyHeader>
<Name></Name>
<AssemblyId></AssemblyId>
</AssemblyHeader>
<AssemblyHeader></AssemblyHeader>
<ApplicationId></ApplicationId>
<ApplicationName></ApplicationName>
<ApplicationValidFrom></ApplicationValidFrom>
<ApplicationValidTo></ApplicationValidTo>
</AssemblyProduct>

Well you could write your procedure to accept a parameter of XMLTYPE datatype and then use that value in a query inside the procedure to break the data up as required using something like XMLTABLE e.g.
-- Nested repeating groups example:
WITH t as (select XMLTYPE('
<RECSET>
<REC>
    <COUNTRY>1</COUNTRY>
    <POINT>1800</POINT>
    <USER_INFO>
      <USER_ID>1</USER_ID>
      <TARGET>28</TARGET>
      <STATE>6</STATE>
      <TASK>12</TASK>
    </USER_INFO>
    <USER_INFO>
      <USER_ID>5</USER_ID>
      <TARGET>19</TARGET>
      <STATE>1</STATE>
      <TASK>90</TASK>
    </USER_INFO>
</REC>
<REC>
    <COUNTRY>2</COUNTRY>
    <POINT>2400</POINT>
    <USER_INFO>
      <USER_ID>3</USER_ID>
      <TARGET>14</TARGET>
      <STATE>7</STATE>
      <TASK>5</TASK>
    </USER_INFO>
</REC>
</RECSET>') as xml from dual)
-- END OF TEST DATA
select x.country, x.point, y.user_id, y.target, y.state, y.task
from t
    ,XMLTABLE('/RECSET/REC'
              PASSING t.xml
              COLUMNS country NUMBER PATH '/REC/COUNTRY'
                     ,point   NUMBER PATH '/REC/POINT'
                     ,user_info XMLTYPE PATH '/REC/*'
             ) x
    ,XMLTABLE('/USER_INFO'
              PASSING x.user_info
              COLUMNS user_id NUMBER PATH '/USER_INFO/USER_ID'
                     ,target NUMBER PATH '/USER_INFO/TARGET'
                     ,state   NUMBER PATH '/USER_INFO/STATE'
                     ,task    NUMBER PATH '/USER_INFO/TASK'
             ) y
   COUNTRY      POINT    USER_ID     TARGET      STATE       TASK
         1       1800          1         28          6         12
         1       1800          5         19          1         90
         2       2400          3         14          7          5And then you can extract and insert whatever parts you want into whatever tables as part of the procedure.

How to write a PL/SQL stored procedure in Oracle to call Webservice

Can any one pelase send me a code on how to write a PL/SQL stored procedure in Oracle database to call the Webservice ?
Thanks,
Rajesh

Were you able to solve this problem

How to call PL/SQL stored procedure using ODBC?

Could anyone tell me how can I call PL/SQL stored procedure using
ODBC? Are there any sample codes?
Thanx!
null

You are correct on all counts, they all should work.
Oracle Product Development Team wrote:
: Hi,
: I don't know the exact syntax in ODBC, but reasoning by analogy
: with other API's, I'd bet one of the following works
: (for a call to: procedure my_proc(n1 number, n2 number);):
: "{ my_proc(1,2); }"
: "{ call my_proc(1,2); }"
: "{ begin my_proc(1,2); end }"
: "begin my_proc(1,2); end;"
: "begin my_proc(1,2); end"
: Hope this helps. - Pierre
: jiangbuf (guest) wrote:
: : Could anyone tell me how can I call PL/SQL stored procedure
: using
: : ODBC? Are there any sample codes?
: : Thanx!
: Oracle Technology Network
: http://technet.oracle.com
null

How to call PL-SQL/stored procedure in Creator

Anybody can tell how to call PL-SQL/Stored procedures inside creator...

Hi!!!
You can see this topic http://forum.sun.com/jive/thread.jspa?threadID=106046
There is how to call oracle stored procedures. Also I put a lot of links in these topic doing reference stored procedures. I have one that it tells specially how to call oracle stored procedures from java, is in spanish but you can understand the code.;-)
http://yoprogramador.vampisol.com/index.php?title=pl_sql_oracle_desde_java&more=1&c=1&tb=1&pb=1
Byeee

PL/SQL stored procedure?

Hi,
Is any body could help me to execute
an PL/SQL stored procedure via JDev3.1
(using Oracle conection, No JDBC).
Please provide sample code if possible?
Thanks in Advance.
Reza

Hi
you could use JPublisher Wizard in JDeveloper to generate Java Wrapper classes for pl/sql stored procedures.
check out the online demos http://technet.oracle.com/products/jdev/info/jdev/jpublisher/s000.html
Also there is information in the online doc.
Check the release notes for supported database versions.
raghu

Error calling PL/SQL stored procedure

Hi,
I'm pretty new to JDeveloper having used NetBeans for the last few years.
I'm getting an error when trying to call a PL/SQL stored procedure. When I click on any of the oracle errors I get an "unable to find source file" message. The errors occurs in call.execute(). The error message and Java code are listed below. Any help is much appreciated.
Cheers,
Stevie
Errors:
Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String index out of range: 33
     at java.lang.String.charAt(String.java:558)
     at oracle.jdbc.driver.OracleSql.handleODBC(OracleSql.java:877)
     at oracle.jdbc.driver.OracleSql.parse(OracleSql.java:811)
     at oracle.jdbc.driver.OracleSql.getSql(OracleSql.java:284)
     at oracle.jdbc.driver.OracleSql.getSqlBytes(OracleSql.java:538)
     at oracle.jdbc.driver.T4CCallableStatement.doOall8(T4CCallableStatement.java:169)
     at oracle.jdbc.driver.T4CCallableStatement.execute_for_rows(T4CCallableStatement.java:873)
     at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1161)
     at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3001)
     at oracle.jdbc.driver.OraclePreparedStatement.execute(OraclePreparedStatement.java:3093)
     at oracle.jdbc.driver.OracleCallableStatement.execute(OracleCallableStatement.java:4286)
     at oracle.CallPLSQL.callLMO(CallPLSQL.java:118)
     at oracle.TestHarness.main(TestHarness.java:18)
Jave Code:
package oracle;
import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Types;
public class CallPLSQL {
private Connection conn;
public CallPLSQL() {
*Constructor.
try {
//Register Oracle Database Drive
DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
//set connection
String connectionString="jdbc:oracle:thin:TSD/TSD@DEV:1526:DEVELOP";
this.setConn(DriverManager.getConnection(connectionString,"TSD", "TSD"));
} catch (SQLException ex) {
public int callproc () throws SQLException {
CallableStatement call;
String callString = "{call proc" +
call = conn.prepareCall(callString);
call.setInt(1, 120289);
call.setInt(2, 2008);
call.registerOutParameter(3, Types.INTEGER);
call.registerOutParameter(4, Types.INTEGER);
call.registerOutParameter(5, Types.INTEGER);
call.registerOutParameter(6, Types.DATE);
call.registerOutParameter(7, Types.VARCHAR);
call.registerOutParameter(8, Types.INTEGER);
call.registerOutParameter(9, Types.INTEGER);
call.execute();
int i = call.getInt("app_id");
return i;
public void setConn(Connection conn) {
this.conn = conn;
public Connection getConn() {
return conn;
}

I've fixed it now. I'd missed a } in prepareCall. What a doughball.

MS SQL Stored Procedure problem

Hi,
I am using BO XI R2, Crystal Report XI and MS SQL Database.
I found a strange error when generating the report using my java application if the crystal report is using MS SQL stored procedure. The error encountered :
com.crystaldecisions.sdk.occa.managedreports.ras.internal.a: Cannot open report document. --- Custom table prefix specified in the InfoStore does not exist. This is a configuration problem. Please contact your system administrator.
cause:com.crystaldecisions.sdk.occa.report.lib.ReportSDKServerException: Custom table prefix specified in the InfoStore does not exist. This is a configuration problem. Please contact your system administrator.---- Error code:-2147467259 Error code name:failed
detail:Cannot open report document. --- Custom table prefix specified in the InfoStore does not exist. This is a configuration problem. Please contact your system administrator.
This is when the code executed is:
reportClientDocument = reportAppFactory.openDocument(report, 0, Locale.ENGLISH);
If the report does not use the stored procedure, it's ok.
If i run the report (with stored procedure) from CMC using the default table prefix (in database config tab), it's able to generate the report.
If i select custom table prefix and specify the custom table prefix value with the same value as in the default table prefix, it could not generate the report and error stated that the table could not be found.
Please enlighten me if you have use MS SQL database for reporting with BO XI R2.
Thanks.

That means it's not a SDK-specific error.
Once it's resolved in InfoView, it'll likely be resolved with your app.
You might want to open a support case with SAP.
Sincerely,
Ted Ueda

Very Odd PL/SQL Stored Procedure Behavior

I'm writing a jsp/struts front-end for a legacy app that makes extensive use of stored procedures. I've sucessfully created a login page, a search page, and a master record detail/edit page. On the master record detail there are a series of subordinate data grids, each with links to individual pages for record editing.
If I edit the master record and click my save button (a commit action), the appropriate stored proc is called and everything works as it should.
BUT, if I click on the edit link to a subordinate table, I am taken to the screen, I can make changes, and when I click save (another commmit event) the stored procedure for that table is not called. No errors, the struts action takes me back to the previous screen (correctly), but nothing is saved.
The weird part is, once I've returned to the master record page, if I edit the master record and click the same save button as before, the stored procedure for the subordinate table that I had just looked at is fired.
I know my struts actions are correct, since the pages navigate correctly (at least, I 'think' I know that). I used the same code in the EO Impl to set up my call to the stored procs.
Does anybody have ANY idea what might be causing this? I'm lost and confused at this point.
(EO Impl Code below)
/*doesn't print dodml until I click save on the master record...this is the code for the child. */
protected void doDML(int operation, TransactionEvent e)
System.out.println("dodml");
switch (operation) {
case DML_INSERT: {
callInsertExternalNumber("I");
break;
case DML_UPDATE: {
callInsertExternalNumber("U");
break;
void callInsertExternalNumber(String function) {
CallableStatement st = null;
try {
System.out.println("calling stored proc");
String stmt = "BEGIN mySchema.InsertNumber(?,?,?,?,?,?,?); END;";
DBTransaction tr = getDBTransaction();
st = tr.createCallableStatement(stmt,1);
if (getExternalKey() != null) {
st.setLong(1,getExternalKey().longValue());
...etc. etc. The calling stored proc doesn't get printed until I click save on the master record.

Hi
you could use JPublisher Wizard in JDeveloper to generate Java Wrapper classes for pl/sql stored procedures.
check out the online demos http://technet.oracle.com/products/jdev/info/jdev/jpublisher/s000.html
Also there is information in the online doc.
Check the release notes for supported database versions.
raghu

Actuate 7 PL/SQL Stored Procedure Call Before the Report Run.

Hi,
I need a small help to call a pl sql stored procedure in actuate 7.
I wrote a code a on component content
Function runProc(procName as String, connection As AcDBConnection )
' Insert your code here
Dim statement As AcDBStatement
Dim results as string
' Prepare statement
Set statement = connection.Prepare("BEGIN " & procName & "; END;" )
If statement Is Nothing Then
results = "Failed to prepare statement."
results = results & " " & connection.GetSpecificErrorText( )
results = results & " " & connection.GetGeneralErrorText( )
Exit sub
End If
' Execute sprocoutparam
If statement.Execute() = 0 Then
results = "Stored procedure " & procName & "execution failed."
results = results & " " & connection.GetSpecificErrorText( )
results = results & " " & connection.GetGeneralErrorText( )
Else
results = "Stored procedure " & procName & " execution success."
End if
ShowFactoryStatus(results)
End FunctionNow this Code I am calling on the Chart Start Method
Sub Start( )
    Super::Start( )
    ' Insert your code here
    Dim ProcName as String
    Dim connectionObject As AcDBConnection
    ProcName="DELETECUSTOMER(1234)"
    runProc(ProcName, connectionObject )
End SubNow when i Run the Report i get this Error !
NewReportApp::Frame::Chart%Start(9): Invalid procedure reference. - (runProc)
1 Semantic Error(s) found
Thanks,
Asif

hi,
Finally Figured Out Here....
Steps to Call the Stored Procedure In Actuate 7
1 – Right Click on Content – Frame and go to properties and method Tab.
     1 – Click on New Button to you create own custom method.
     2 – Write the following code :
Sub runProc(procName as String, connection As AcDBConnection )
     Dim statement As AcDBStatement
     Dim results as string
     Set connection = GetConnection()
     'Prepare statement
     Set statement = connection.Prepare("BEGIN " & procName & "; END;" )
          If statement Is Nothing Then
               results = "Failed to prepare statement."
               results = results & " " & connection.GetSpecificErrorText( )
               results = results & " " & connection.GetGeneralErrorText( )
               MsgBox "Procedure Not Called....Badddddd"
               Exit sub
          End If
     ' Execute sprocoutparam
          If statement.Execute() = 0 Then
               results = "Stored procedure " & procName & "execution failed."
               results = results & " " & connection.GetSpecificErrorText( )
               results = results & " " & connection.GetGeneralErrorText( )
               MsgBox "Procedure Not Called....Badddddd" & results
          Else
               results = "Stored procedure " & procName & " execution success."
               MsgBox "Procedure Called....Wowwww"
          End if
          ShowFactoryStatus(results)
End Sub2 – Now let call the stored procedure before our actual report query runs.
     1 - Right Click on Content – Frame and go to properties and method Tab.
     2 - Select the Start Method and Click on Override button.
     3 - Write the following code:
Sub Start( )
     Dim ProcName as String
     Dim connectionObject As AcDBConnection
     Set connectionObject = GetConnection()
     ProcName="XXTEST ()"
     runProc( ProcName, connectionObject )
    Super::Start ( )
End Sub3 – Now design your report as usual using the Textual Query window.

PL\SQL Stored Procedure failing.

Hi,
I have a collection of stored PL\SQL procedures in an Oracle 8i database. I call these stored procedures from Java code through OracleCallableStatement.
I am experiencing a very strange problem. The system will run fine for a number of hours/days, during which time there will be many hundreds of successful calls to the stored procedures through the JDBC.
Then, seemingly at random a call will fail. The error originates in the stored procedure and is reported as TABLE OR VIEW DOES NOT EXIST. I must stress here that a procedure that has run successfully many times before, will suddenly fail with this error.
To my knowledge the stored procedures and schema have not been altered at all. Recompiling the PL\SQL procedure solves the problem.
Could someone please help me to understand this strange behaviour.
Thanks in advance,
Max
Oracle 8.1.7
Java 1.3.1
Classes12.zip

Hi Max,
If the error you are receiving is "TABLE OR VIEW DOES NOT EXIST", then you are indeed trying to access a non-existent table. Either the table has been "dropped" or you are using the wrong name to access it. Is the table a temporary table? Are you dynamically generating the name of the table in your java (or PL/SQL) code? When the error occurs, are you verifying whether the table does exist (or not)? Are there any background processes running (like backups, or statistics gathering) that may interfere with your stored procedures? Are these stored procedures in (PL/SQL) packages (that rely on "global" variables that suddenly have their values changed)?
Solving the problem is easy. Finding the cause of the problem is hard. The error message can sometimes be misleading.
Good Luck,
Avi.

PL/SQL Stored procedures vs C# code.

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