JDBC: complains about invalid sign but seems fine

Question

I have to use JDBC to write to a database (hibernate/ibatis is not an option) and my database is Oracle 11g.

I create the following query: insert into user(user_id

Answer 1

TO_TIMESTAMP('14/12/2010 15/09/46', 'DD/MM/RR HH24/MI/SS')

You send a 4-digit year but the format string defines a 2-digit year (no century)

Give this a try:

insertQuery.append("', 'DD/MM/RRRR HH24/MI/SS'));");

Answer 2

As I put in a comment above, the issue could be due to the extra Semicolon at the end of your SQL statement. see this article

You may also want to look at PreparedStatments to make your life easier. Here would be a rough translation of your above code. I have left some parts, and there are most likely errors.

String query = "insert into user(user_id, username, age, creation_ts) values(?,?,?,?)";
PreparedStatement pstmt = conn.prepareStatement(query);
... //fill in all your parameters
pstmt.setTimestamp(4, new Timestamp(System.currentTimeMillis()) );
... //execute here

Answer 3

Are you sure the value of the username variable is 'Jack' and not Jack? (the ORA-00911 error doesn't look like a typical date format error).

Also you should learn about PreparedStatement. They are more efficient, easier to read and debug and not susceptible to SQL injection.

My java is a bit rusty, but this would look something like this with a PreparedStatement:

String query = "insert into user(user_id, username, age, creation_ts) values "
              + "(seq_userid.NEXTVAL, ?, ?, ?)";

Statement st = conn.prepareStatement(query);

st.setString(1, username);
st.setInt(2, age);
st.setTimestamp(3, new java.sql.Timestamp(
                          Calendar.getInstance(
                             TimeZone.getDefault()).getTimeMillis()));

st.executeUpdate(insertQuery.toString());

This way you don't need to convert a date to a string to get it converted back by the DB. Also you may find the statement easier to read and you will never have to worry about user's naming their account with a ' (single-quote) :)