How can i insert timestamp with timezone in postgresql with prepared statement?

Question

I am trying to insert to a timestamp with timezone field of my DB a string which includes date, time and timezone using prepared statement.

The problem is that Timestamp

Answer 1

I believe that you could use one more field in your database, which would include the time zone. And calculate the time manually after you get these two fields

Answer 2

The basic problem is that a java.sql.Timestamp does not contain timezone information. I think it is always assumed to be "local timezone".

On solution I can think of is to not use a parameter in a PreparedStatement, but a timezone literal in SQL:

update foo
  set ts_col = timestamp with time zone '2012-08-24 14:00:00 +02:00'`;

Another possible solution could be to pass a properly formatted String to a PrepareStatement that uses to_timestamp():

String sql = "update foo set ts_col = to_timestamp(?, 'yyyy-mm-dd hh24:mi:ss')"; 
PreparedStatement pstmt = connection.prepareStatement(sql);
pstmt.setString(1, "2012-08-24 14:00:00 +02:00");