Question

i’m working with java to extract values of a time column in table in mysql.

the code below show the query i do send.

String query="select id,time from table where Hour(time)<=32 ";
ResultSet res = stmt.executeQuery(query);
while (res.next()) {
  String id = res.getString(1); 
  Time tc = res.getTime("time");
  System.out.println(tc);
}

the time values can be negative (-56:00:00 meaning that we surpassed a certain delay.
the problem is that I get: java.sql.SQLException: java.sql.SQLException: Bad format for Time ‘-05:48:49’ in column 2.

thanks for your help.

Answer 1

As answered in your previous question you need to store and handle it as seconds which is stored as a signed integer.

The time type cannot be negative. You also cannot do math on a varchar/string and massaging it forth and back to a workable format as suggested by Andreas_D would only add unnecessary overhead. A signed integer is really the best datatype you can use for this. Use PreparedStatement#setInt() to store it and use ResultSet#getInt() to obtain it.