I would like to use prepared statements, for many reasons.
But, I would like to create a method that looks like this:
/* This opens a connection, executes the query, and closes ...
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Few questions on JDBC coding:
- For a single client application, do we need a Connection pool?
- Is it a good idea to create a Connection at beginning and keep it alive without close ...
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We are running a websphere commerce site with an oracle DB and facing an issue where we are running out of db connections.
We are using a JDBCHelper singleton for getting the ... |
When using a PreparedStatement in JDBC, should I close the PreparedStatement first or the Connection first? I just saw a code sample in which the Connection is closed first, but it ... |
I have been developing a web application for almost a year which I had started in college. After finishing, I made some changes to the database code that I had written ... |
I have a question regarding general use of Prepared Statement along with connection pooling.
Prepared Statements are generally tied to one connection only.In our application, a PreparedStatement is created at the start ... |
Okay, I've realized that I really have asked way too many questions without contributing back to the community, but I want your opinions on this. Say if I have
private void closeAll(ResultSet ...
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Hello, I'm experiencing OutOfMemoryError in my application, and it's almost always caused by calling one query too many times. For some reason, the statements executed by that query do not get garbage collected. Note: it is not one instance of this query that causes OutOfMemoryError, it is a memory leak that builds up until the application runs out of memory. Here's ... |
If a code is using connection pooling will the benefit of using Prepared Statement is valid. Say, if i take a connection from a pool, prepare a statement using that connection, execute the querry and release the connection to pool. Now for the second time when i take a connection from the pool, i do not get the same connection as ... |
I have read a little about this on the internet on previous posts, but I have seen different things, so I want to make sure that I am understanding this correctly. I have an web app server (tomcat). It maintains a persistent conncetion to the database (mypool) that I store in the servlet context. Each time my code needs to access ... |
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Hi Everyone, I would like to know that for executing different PreparedStatement do we need different Connection object? I am using one single connection object and trying to execute three SQL Queries. When i run the fragment of code below, its not going into the while loop. I thought the SQL queries where incorrect. But when i executed them on SQL ... |
Hello, I am having a scenario where I will have to open a connection in Serializable level, so that I want to lock the entire table that my code works on. Now I have three statments to execute, and I am using prepared statements. I have a few questions regarding the connection api and prepared statments api say my code looks ... |
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is it possible to create a preparedstatement without using a connection? i want to create a method that will accept a query string that should be executed and return a resultset. but i think passing a query without using preparedstatement is not a good idea so i will use preparedstatement as a parameter instead of a query string. is there any ... |
public void displayDbProperties(){ java.sql.DatabaseMetaData dm = null; java.sql.ResultSet rs = null; try{ con= this.Connect(); if(con!=null){ dm = con.getMetaData(); System.out.println("Driver Information"); System.out.println("\tDriver Name: "+ dm.getDriverName()); System.out.println("\tDriver Version: "+ dm.getDriverVersion ()); System.out.println("\nDatabase Information "); System.out.println("\tDatabase Name: "+ dm.getDatabaseProductName()); System.out.println("\tDatabase Version: "+ dm.getDatabaseProductVersion()); System.out.println("Avalilable Catalogs "); rs = dm.getCatalogs(); while(rs.next()){ System.out.println("\tcatalog: "+ rs.getString(1)); } rs.close(); rs = null; closeConnection(); }else System.out.println("Error: No active Connection"); ... |