PreparedStatement and execute() method

Hi to all.
I would like to understand a thing.
Why the execute() method gives me back false also if the SQL instructions is well executed?
Is this right?
TIA
Omar

Returns:
true if the first result is a ResultSet object; false if the first result is an update count or there is no result
http://java.sun.com/j2se/1.4.2/docs/api/java/sql/PreparedStatement.html#execute()

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Edited by: Harishwar_Madhya on Sep 3, 2010 2:47 AM
Edited by: Harishwar_Madhya on Sep 3, 2010 2:49 AM

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Is there such thing as a "compile and execute statement" in Java?

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What's the difference between "PreparedStatement" and "Statement"?

What's the difference between "PreparedStatement" and "Statement"?
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Lorem ipsum dolor sit amet, barfooconsectetur adipiscing elit. Vivamus sed purus urna, ac tristique tortor. Nam auctor tellus non enim pulvinar a vestibulum neque tincidunt.
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function FindAndReplaceString(pDoc, findString, replaceVariable)
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Hi,
Not at the moment. Please post in http://forums.adobe.com/community/muse/ideas so other users can vote on the feature request.
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Working with class based exception and dynamic method calls

Hi Gurus,
we just changed out ERP from EHP6 to EHP7.
Since we did so we are facing an issue with an Z-Report we are using quite often.
This reports looks up Workitems and executes the according methods so that we can go into debugging if we were facing any problems or errors.
since the EHP Upgrade this statement has problems:
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/IDXGC/CX_PROCESS_ERROR
Process Layer Exception
CX_BO_TEMPORARY
Temporary Business Exception
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INDEX
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2
/IDXGC/CX_PROCESS_ERROR
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CX_BO_TEMPORARY
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Class-based exceptions must be caught using try/catch statement.
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I am developing a WebDynpro Application which will use a EJB for business logic. I am using a javabean as interface between EJB ane WebDynpro. I created a instance of model in webdynpro and i am trying to retrive the data from backend. But in webdynpro, while writing the execute() method, it displaying that execute() method is undefined for this type.
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Hello Pavan,
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Hi,
I have a question about PreparedStatement objects that is not so simple to explain for me. What I would like to know is: if I use a PreparedStatement following traditional and generic steps:
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I know that Java allows you to do this kind of operations with PreparedStatement, and I know that in tha Java Documentation is explained to follow this strategy to optimize the execution time because in this way the same PreparedStatement is precompiled and prepared only once. But if I do a for loop following the steps explained before, after many iterations I have the error "ORA-1000: maximum open cursors exceeded". This error is the reason of my question. Does this error means that it's mandatory to close a PreparedStatement always, otherwise if you reuse it without closing it then the corresponding database cursor will be duplicated ? If it is so, then I think this is a contradiction with official java documentation ...
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There is no need to close a prepared statement or its resultset for every iteration.
After the first iteration in a loop, all subsequent executions of it will close the previous resultset. By adding close() method, you are making one extra costly call to the DB for no reason.
Following is the sample code.I know what you are saying. In fact at the beginning I wrote my code in the same way of your sample (see the code of my first post at the begin of this page).
But doing so, after thousand iterations of the loop, I had "Oracle Error ORA-1000 : maximun open cursor exeeded" even if in my database istance the parameter "maximum open cursor" is equal to 8000.
At this moment in my code, for each iteration, I close the PreparedStatement and in this way I don't have anymore the error :-((
So it seems that only in theory we can reuse a preparedStatement without closing it. In fact if we see the oracle system table "$open_cursor" (as Konrad Pietzka suggest me) we can find that, for each interation,
at our line code "rs = pstmt.executeQuery();" correspond a new cursor in the database: this means that for each method "pstmt.executeQuery()" the database open a new cursor and do not use the previous one as it should.
I posted a question two months ago to search if someone had the same problem (it seems that Konrad Pietzka had the same situation) and was able to explain me what is the cause.
The only reason I found by myself for this problem, is that probably the Oracle JDBC Thin Driver for Windows NT/2000 has some bugs... but I'm not sure ...
Thank you very much for you time !!
bye :-))
Fidalma

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Hi Gurus
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PreparedStatement and execute() method

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