1. Java, ResultSet.close(), PreparedStatement.close() -- what for? stackoverflow.comIn my web-application, i make extensive use of a database. I have an abstract servlet, from which all the servlets that need a database connection, inherit. That abstract servlet creates a ... |
2. When should a java PreparedStatement be closed? stackoverflow.comIn the tutorial "Using Prepared Statements" it states that they should always be closed. Suppose I have a function |
3. Closing PreparedStatements stackoverflow.comDoes use of PreparedStatements and ResultSets creates a "new database instance" everytime they are used? Or, whith other words, if I use a PreparedStatement and a ResultSet, should I close them after ... |
4. When to close static PreparedStatements coderanch.comAs I understand PreparedStatements (and I'd be happy for someone to correct me) they are a mechanism to allow the query to be built and cached at the database side, so there is little advantage in trying to increase the performance at the application. You'll probably even run into resource handling and threading problems. Personally I think you should just keep ... |
5. Q: repeatedly execute() on PreparedStatement without close() coderanch.com |
6. When do you close PreparedStatements? coderanch.com |
7. Problem closing PreparedStatement coderanch.com |
8. IllegalArgumentException when closing PreparedStatement coderanch.compublic String processLogin() throws SQLException { String redirect = "login"; Connection con = null; PreparedStatement stmt = null; String query = null; ResultSet qRes = null; try { con = General.dataSource.getConnection(); //validate the user query = "select username from User where username=? and password=?"; stmt = con.prepareStatement(query); stmt.setString(1, username); stmt.setString(2, password); qRes = stmt.executeQuery(); if(qRes.first()) //valid { redirect = "home"; } ... |
9. Closing PreparedStatement coderanch.com |
10. How to understand not closed PreparedStatement and ResultSet. coderanch.comI have a stand alone java program which loops across all tables present in the database, and does not close the prepared statements and result sets created during the code execution, which finally leaves as many un used prepared statements and result sets open as the number of tables. Now the question is, will this hurt the machine that is executing ... |
11. Prepared Statement not closing cursor coderanch.comHi, I have a method which returns a resultset. The problem is that the cursor remains open and it exceeds the total number of cursors allowed and errors out. What is wrong with the following code? private ResultSet createRecordSet(long entityID, String tableName, String linkType, long runID, String extraSQL) throws Exception { ResultSet rs = null; String sqlString = " SELECT runID, ... |