I'm getting a weird SQLException on a function I run against a database using JDBC. SQLException: Column 'Message' not found.
I have this in my function:
st = con.prepareStatement("SELECT NotificationID,UserIDFrom,UserIDTo,Message,Timestamp,isNotified FROM notification WHERE UserIDTo=? AND isNotified=?");
st.setInt(1, _UserID);
st.setBoolean(2, false);
System.out.println("st is: " + st);
rs = st.executeQuery();
And I got that error, so I added this after the st.executeQuery()
:
ResultSetMetaData meta = rs.getMetaData();
for (int index = 1; index <= meta.getColumnCount(); index++) {
System.out.println("Column " + index + " is named " + meta.getColumnName(index));
}
And when I run my code again this is what I get as a result:
Column 1 is named NotificationID
Column 2 is named UserIDFrom
Column 3 is named UserIDTo
Column 4 is named Message
Column 5 is named TimeStamp
Exception in thread "main" java.sql.SQLException: Column 'Message' not found.
Column 6 is named isNotified
And here is a screenshot of my table's design, from MySQL Workbench
And the data in the table
I really can't figure out what's going one here.... Anyone can help out?
EDIT
I've replaced the *
in the SELECT
statement just to add something to the question that I just noticed.
If I remove the Message
column from the select then I get the same error for the TimeStamp
column. And if I remove both columns I get no errors then.
EDIT2
OK,this is the part i get the errors, i get both on Message and Timestamp:
while (rs.next()) {
NotificationID = rs.getInt("NotificationID");
System.out.println("NotificationID: " + NotificationID);
SenderID = rs.getInt("UserIDFrom");
System.out.println("SenderID: " + SenderID);
From = findUserName(SenderID);
try {
body = rs.getString("Message");
System.out.println("body: " + body);
} catch (Exception e) {
System.out.println("Message error: " + e);
e.printStackTrace();
}
try {
time = rs.getString("Timestamp");
System.out.println("time: " + time);
} catch (Exception e) {
System.out.println("Timestamp error: " + e);
e.printStackTrace();
}
}
I get the error on the getString()
methods for each column
StackTrace for TimeStamp
(the same for Message
):
java.sql.SQLException: Column 'TimeStamp' not found.
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1078)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:989)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:975)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:920)
at com.mysql.jdbc.ResultSetImpl.findColumn(ResultSetImpl.java:1167)
at com.mysql.jdbc.ResultSetImpl.getString(ResultSetImpl.java:5733)
at NotifyMe_Server.Database.getUnNotified(Database.java:444)
at tests.Tests.main(Tests.java:39)
If you observe your code
try {
time = rs.getString("Timestamp");
System.out.println("time: " + time);
} catch (Exception e) {
System.out.println("Timestamp error: " + e);
e.printStackTrace();
}
}
you have used "Timestamp" in this format but if you changed it to "TimeStamp" as specified in your database, hopefully it will work.