Showing posts with label IT. Show all posts
Showing posts with label IT. Show all posts

Saturday, August 18, 2007

counting rows in ResultSet

hey you,

if you find difficulty to count number of rows in ResultSet, hope my experience I write below helps.

The problem usually comes up because you try these lines of code:

rs.last();
int i = rs.getRow();
rs.first();

*rs = ResultSet

rs.first() trigger SQLException that caused by a database access error occurs OR the result set type is TYPE_FORWARD_ONLY

the easiest way I figured out is by changing the type of ResultSet like this:

Statement st = conn.createStatement( ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);


the 2 parameters of createStatement() method are resultSetType & resultSetConcurrency.
type of ResultSet are:
1. ResultSet.TYPE_FORWARD_ONLY
2. ResultSet.TYPE_SCROLL_INSENSITIVE
3. ResultSet.TYPE_SCROLL_SENSITIVE

type of Concurrency are:
1. ResultSet.CONCUR_READ_ONLY
2. ResultSet.CONCUR_UPDATABLE


That's all from now. Please indicate whether this information useful or not OR maybe you have better solution than this one. I am a leaner as well ^_^