Java Database Connectivity (JDBC)

Hi,
I'm developing a program that requires to read the column type of some tables.
This is my sample code:

ResultSet r = connection.getMetaData().getColumns(null, "USER", "TABLE", "TS_COL");
while (r.next()) {
	int n = r.getMetaData().getColumnCount();
	for (int i=1;i<=n;i++) {
		System.out.print(r.getMetaData().getColumnName(i));
		System.out.print("=");
		System.out.println(r.getString(i));
	}
}

If I run that code using DataDirect driver, I get the following response:

TABLE_SCHEM=USER
TABLE_NAME=TABLE
COLUMN_NAME=TS_COL
DATA_TYPE=93
TYPE_NAME=TIMESTAMP
COLUMN_SIZE =11
....

But, if I run the same code with oracle thin jdbc driver, I get the following result:
TABLE_SCHEM=USER
TABLE_NAME=TABLE
COLUMN_NAME=TS_COL
DATA_TYPE=93
TYPE_NAME=TIMESTAMP(6)
COLUMN_SIZE =11
DECIMAL_DIGITS=6
....


I want to know if the "*(6)*" belongs to the data type or if it is just a bug.

I really appreciate your help,
Ariel A.