ResultSet « Statement « Java Database Q&A





1. How often should Statement and ResultSet objects be closed in JDBC?    stackoverflow.com

Do they need to be closed after each query and initialized at the beginning of each query?

2. JDBC ResultSet closed statement    stackoverflow.com

I'm trying to write a function that updates 2 tables in my database. I'm getting an error which i think is caused by calling next() on a resultset that has no ...

3. Resultset Mapping Returns null, SQL statement doesn't    stackoverflow.com

I have an SQL statement like this:

SELECT generatedresult,sum(size) as count  FROM table1_detail AS w WHERE date > '2011.06.01' AND w.l_date < '2011.06.02'  GROUP BY category ORDER BY count  ...

4. Closing Resultset and statement    stackoverflow.com

Can any one help on the issue encountered in the following piece of code. It seems that DB connection is lost when trying to execute the query in section 2.

 String ...

5. How to close the statement object in the method that returns a resultset    coderanch.com

hi, i have a database class which does all my database operations. I am using connection pooling. One of my function is executequery which takes in the SQL query as a parameter and retuns the Resultset. Now the problem is that i am able to release the connection but i am not able to close the statment object. If I close ...

6. When to close Statement & ResultSet?    coderanch.com

Hallo, is it a general solution to always close the Statement- and ResultSetobjects after you get what you want(executing the statement and iterating through the resultset)? What would happen if I "fail" to close either of them? In my webapp I execute a number of statements and I just discovered I never close them or the resultsets. BUT, it works fine ...

7. Statement, ResultSet    coderanch.com

8. Closing ResultSet and Statement    coderanch.com

I am cleaning up/debugging the following code: stmt = conn.createStatement(); stmt.execute(some_select_query1); rs = stmt.getResultSet(); // ..... some code that uses rs .... stmt.execute(some_select_query2); rs = stmt.getResultSet(); // ..... some code that uses rs .... My question is: does the code leave hanging resultset objects? Does it need rs.close() before each 'rs = stmt.getResultSet();' What is your opinion/experience on that? Thank you. ...

9. problem : callable statement / COBOL services How to get ResultSet(s)    coderanch.com

LO For a professionnal project i have to work with DB2 data returned by COBOL services. These COBOL services take several blocs in input and several blocs in outpout. I call one callable statement calling the needed COBOL services. like this : st = con.prepareCall("{call TI01.PCPSTK01 (?,?,?,?,?,?)}"); st.setString(1,service+new String(new char[32])); st.setString(3,inputString); st.registerOutParameter(2,Types.VARCHAR); st.registerOutParameter(4,Types.VARCHAR); st.registerOutParameter(5,Types.VARCHAR); st.registerOutParameter(6,Types.VARCHAR); st.execute(); /* ResultSet rs = st.getResultSet(); ...





10. JDBC Callable Statement JConnect2 Returning null resultset    coderanch.com

Stored Procedure for implementing pagination Transact-SQL CREATE PROCEDURE dbo.pr__Get_Employees @endindex Int, @pagesize Int AS BEGIN Create table #temp_cws(id numeric(5) identity, name varchar(100)) Insert into #temp_cws Select name From EMPLOYEE Select e.name, e.* from #temp_cws t, EMPLOYEE e WHERE (t.id > @endindex - @pagesize And t.id <= @endindex) AND e.name = t.name END When I call this procedure from Java program I ...

11. Closing ResultSet and Statement    coderanch.com

Alec, If you are using the same SQL each time you create a "PreparedStatement", then I agree with everything Sonny said. I think he has given you good advice. However, if you are using many, different SQL statements in your "for" loop, then you probably need to create separate "PreparedStatement"s for each SQL statement. Good Luck, Avi.

13. Bug in JDBC ? Simple Select statement not returning a resultSet    coderanch.com

Hey guys! Background info: The database is a Microsoft SQL Server 2008 The java program is running on a Windows 2003 Server 64 bit I'm using the latest verison of java off of oracles site My problem is that I'm not getting a resultset when executing a SQL-statement, I really just can't figure out why. Executing this string in the Microsoft ...

14. Callable Statement Resultset    coderanch.com

Thanks Phil and Grdihar That's what I realized that executeQuery won't work. Following on number 2 from Philip. My problem is that I have to return a ResultSet object to a client software and it blows up when it receives a null value. I want to make sure that I return a non null resultset value. Apparently from your reply, I ...

15. Strange behaviour of If statement inside an Array derived from ResultSet    java-forums.org

First of all I say Hello to everyone; I'm new here ! My problem: I can't understant why if-else-statemnt does not work inside an array derived from a database ResultSet. I can connect to the database (Ms Access). I can retrieve the data from the database and populate the arrays. I can print all the record and every field is correct. ...

16. ResultSet and Statement objects - are they REALLY closed???    forums.oracle.com

These database objects are associated with resources other than heap memory. A ResultSet, for example, is associated with a database cursor, which uses resources inside the database server. The point of the close call is to release these resources, not the ResultSet object itself. Once closed the object still exists until it becomes unreachable and is eligible for garbage collection in ...





17. One ResultSet per Statement?    forums.oracle.com

18. Method for repeated ResultSet statement    forums.oracle.com

19. Does If-statement work correctly in arrays retrieved by database ResultSet?    forums.oracle.com

I can't understand why in the second code it works .. but i dont care !!! The second code is working because you define the values at declaration time. So compiler takes/consider it as constants. You can re-test the code by defining the values in below way, now '==' will not work: String[] isGeoLocalized = {new String("ok"),new String("no"),new String("ok"),new String("no")};// after ...