Bad performance with PreparedStatement

Question

Hi,
I have a query that returns about 10.000 results on which I have to iterate.
The query is something like that :
SELECT col1,col2 FROM myTable INNER JOIN myTable2 using(id) WHERE time > TO_DATE('15/06/2009 16:28:00','DD/MM/YY HH24:MI:SS') AND time < TO_DATE('16/06/2009 2:35:00','DD/MM/YY HH24:MI:SS');
This query is ultra fast using a basic Statement, It iterate over all line of the cursor in less than 100ms.
The date parts of the query are generated using string concatenation.
Since it's a bad practice I have decided to use a PreparedStatement and so to change the query like that :
SELECT col1,col2 FROM myTable INNER JOIN myTable2 using(id) WHERE time > ? AND time < ?;
I bind the dates and I get exactly the same result, except the performance... Now it doesn't take 100ms... It take about 120000ms (2min)!!!?
The execution of the query is not the problem, the problem comes from the ResulSet.next() method that is much longer than before.
I precise that the exactly same values are used, the result is exactly the same.
I have tried different value for the fetch size but no big differences.
An idea?

Answer 1

Sorry I have answer too fast. I have still performance issue when using the query :
SELECT col1,col2
FROM myTable
INNER JOIN myTable2 using(id)
WHERE time > TO_TIMESTAMP(?,'DD/MM/YY HH24:MI:SS.FF')
AND time < TO_TIMESTAMP(?,'DD/MM/YY HH24:MI:SS.FF')
PreparedStatement stmt = connection.prepareStatement(
SimpleDateFormat sf = new SimpleDateFormat("dd/MM/yy HH:mm:ss.SSS");
stmt.setString(1, sf.format(fromDate));
stmt.setString(2, sf.format(toDate));while the following query perfectly work :
SimpleDateFormat sf = new SimpleDateFormat("dd/MM/yy HH:mm:ss.SSS");
SELECT col1,col2
FROM myTable
INNER JOIN myTable2 using(id)
WHERE time > TO_TIMESTAMP('" + sf.format(fromDate) + "','DD/MM/YY HH24:MI:SS.FF')
AND time < TO_TIMESTAMP(('" + sf.format(toDate) + "','DD/MM/YY HH24:MI:SS.FF')Really bored of oracle products...