Database Error

What This Error Means

This error occurs when you attempt to use a Statement object to scroll through a result set after it has been set to be closed. This is a common mistake that can happen when using JDBC to interact with a database.

Why It Happens

This error happens when you call the close() method on a Statement object, which marks it as closed, and then try to use it to scroll through a result set. JDBC does not allow this because once a Statement object is closed, it can no longer be used to execute queries or access a result set.

How to Fix It

1. 1To fix this error, you need to create a new Statement object after calling close() on the old one. Alternatively, you can use a Prepared Statement or a Connection's executeQuery() method, which will not close the result set. Here is an example of how to fix the code:
2. 2// Before (broken code)
3. 3Statement stmt = conn.createStatement();
4. 4stmt.execute("SELECT * FROM table");
5. 5stmt.close();
6. 6while (stmt.getResultSet().next()) {
7. 7 // Code here
8. 8}
9. 9// After (fixed code)
10. 10Statement stmt = conn.createStatement();
11. 11ResultSet rs = stmt.execute("SELECT * FROM table");
12. 12while (rs.next()) {
13. 13 // Code here
14. 14}
15. 15rs.close();
16. 16stmt.close();

Example Code Solution

Statement stmt = conn.createStatement();
stmt.execute("SELECT * FROM table");
stmt.close();
while (stmt.getResultSet().next()) {
    // Code here
}

Statement stmt = conn.createStatement();
ResultSet rs = stmt.execute("SELECT * FROM table");
while (rs.next()) {
    // Code here
}
rs.close();
stmt.close();