1. JDBC unwanted statement close stackoverflow.comI have a Java JDBC application that uses multiple threads to retrieve information from an Oracle data base. Each thread si supposed to periodically execute a statement that executes a select ... |
2. Where to close statements in JDBC stackoverflow.comI am using JDBC to retrieve data from a database. I understand that a Statement needs to be closed after it is used. However, I keep run into the same error ... |
3. Closing DB Statement stackoverflow.com |
4. When to close Statement when using jdbc stackoverflow.comI am using odbc to connect mysql database in Java I write a function "ExecuteQuery", it takes a string parameter as sql statement and returns its resultset. However, when should I close ... |
5. Would this cause problems closing statements ? coderanch.compublic class Transaction { private List statements; private Connection conn; public Transaction(Connection conn) { this.statements = new ArrayList(); this.conn = conn; this.conn.setAutoCommit(false); } public PrepareStatement prepareStatement(String query) throws SQLException { PrepareStatement stmt = this.conn.prepareStatement(query); this.statements.add(stmt); return stmt; } public void execute() throws SQLException { int count = 0; for (int i =0; i < statements.size(); ++i) { PrepareStatement stmt = (PrepareStatement)statements.get(i); ... |
6. Cascading object close() statements coderanch.com |
7. Statement is closed? coderanch.comI have numerous statement objects and result sets that are defined in different methods in one class. I am closing each statement object in a finally block at the end of each method. Now I keep getting "Statement is closed" error when I try to run my app. What is going on? If I am creating a new Statement object whenever ... |
8. Closing Statement object prior to committing coderanch.comI believe that this will be fine as closing a Statement makes it available for garbage collection and releases any JDBC resources which had been acquired. This is why the closure of JDBC objects is recommended as soon as possible. The Connection does not rely on a Statement for ending a transaction. The Connection encapsulates database connection functionality, the Statement encapsulates ... |
9. garbage collection and statement closing question coderanch.comFirst question: When the garbage collector cleans up a JDBC Connection, does it release the resources? I know that you're always supposed to explicitly close Connections, but in some code that I'm maintaining I found what appears to be a Connection leak, and I just wanted to know how serious it is. If the GC releases the resources, than it's not ... |
10. ObjectClosedException: DSRA9110E: Statement is closed coderanch.comGaurav, on execution of cs = conn.prepareCall(sql) , it returns callablestatement cs which is bad. so whereever I use cs in the code after above exeuction. It throws errors "Statement is closed" so Problem starts happening before it executes cs.execute() and thus data is not an issue. Jan, I had set up parameter preTestSqlString for preTesting but still it's throwing the ... |
11. Statement.close() - when to use it? coderanch.comJeanne and Scotty, Thanks for your responses.. it has been a while that I did jdbc, need a bit of reading... So what you are saying is, the below code as the optimum (with regards to Statement usage): try { s = conn.createStatement(); s.executeQuery(selectString1); s.close(); } catch (SQLException e) { String theError=e.getSQLState(); //table not found if (theError.equals("X0X05") || theError.equals("42X05")) { s ... |
12. Need to close statement object? coderanch.comYou should also close result set, statements, and connections (in that order) as soon as your are done with them since this allows the garbage collector to make optimum use of memory and connections. In fact, most people will tell you that such things should be closed inside a finally block (connections in particular) to make absolutely sure your application does ... |
13. Closing cursor in a stored procedure when invoked from a callable statement coderanch.comOriginally posted by A Kumar: when i return datacursor is it not a opened ??? And is it fine if i close the resultset in java code...for the cursor to be closed..since it is object that i get from the result of the query... It isn't opened until you fetch your cursor... which occurs in your program (the part after the ... |
14. closing a statement vs a result set coderanch.comWe have an application that has been in use for about five years with no problems. The application processes an ever growing table. Today we seemed to have hit a scalability limit The app failed with an ORA-01000 "exceeded maximum open cursors". After a bit of experimentation I determined that this usage was causing the problem: ResultSet rs = conn.createStatement().execute("... query ... |
15. No operations allowed after statement closed. coderanch.comHi, I am using C3p0 as my JDBC connection pool with MySql. I get the following exception after I don't hit the server for a while. While other times, it works. Can you please tell me what may be the root cause of the problem and how can I fix it? Thank you. String getProc = "{ call " + Constants.DB_NAME ... |
16. DSRA9110E: Statement is closed coderanch.com |
17. Closing Statement. coderanch.comHi Costa, Closing a statement will not close the connection because a connection is a higher level concept. Closing a connection will sometimes close a statement but you should not rely on this. Creating a connection is usually relatively costly. This is why people use connection pools. Creating a statement is not costly and a frequent operation. |
19. Invalid state, the Statement object is closed. coderanch.comIn one our production servers the execution of a batch fails consistently and the following stack trace snippet is observed. The problem does not occur on other servers with similar configuration. java.sql.SQLException: Invalid state, the Statement object is closed. at net.sourceforge.jtds.jdbc.JtdsStatement.checkOpen(JtdsStatement.java:219) at net.sourceforge.jtds.jdbc.JtdsStatement.clearBatch(JtdsStatement.java:766) at net.sourceforge.jtds.jdbc.JtdsStatement.executeBatch(JtdsStatement.java:926) ... The application is single-threaded and does not use connection pooling of any sort. The chance ... |
20. Closed Statement issue coderanch.comprivate Connection connection; public ArrayList |
21. closing Statement vs re-using it coderanch.comhi all, was wondering if i dont close a Statement and re-use it to do another select from db would it hold the previous records as well as the current one ?? e.g private Statement Stmt = null; private ResultSet rs =null; try{ Stmt = dbConn.createStatement(); rs = Stmt.executeQuery("Select * from table 1"); while (rs.next()){ //do some logic } }catch (SQLException ... |
22. Closed Statement coderanch.comHi, We have Application running on JBoss with Oracle DB, We use connection pool for DB connection from our APP. I am getting "Closed Statement" Exception atleast 5 to 6 times in the whole day. I am closing the ResultSet,Prepared Statement, Statement, And Connection properly. Please Help Me how to solve this kind of Issue. Here is the Complete jboss trace: ... |
23. Closing a statement you left open, please do your own housekeeping coderanch.comHello, I am getting SQL Exception : "Closing a statement you left open, please do your own housekeeping" . I am properly closing Result Set, Statement, Prepared Statement and Connection in my code. I am confused where the connection is left open :( . Exception Stack Trace : 2011-10-13 10:19:31,484 WARN [org.jboss.resource.adapter.jdbc.WrappedConnection] Closing a statement you left open, please do your ... |