Can not get PK-FK in meta-Data of MySql....Help me pls.

Question

Hello Every one.
I can not to get the PK and FK from Meta-Data Database of mysql-4.1.1a-alpha. Anyway I tried to do the
followihg
1. OS windows 2000 Pro.
2. set configuration Script support InnoDB Table Type as the follow in my.ini file.
[mysqld-nt]
innodb_data_home_dir = C:\mysql\data
innodb_data_file_path =\ibdata\ibdata1:2000M // in folder \data\ i was created folder ibdata
3. I try to create data as reference in example java code and table :persons , shirt as the example in
Create innodb table Type of mysql doc.
4. the code test as following
In the test code i can get the result only from method : getPrimarykey(...); only and the other method ,getExportedKeys, getImportedKey , getCrossReference the result in ResultSet is null.
anyway, this code i can apply in the oracle db with change db driver .
I wish the answer why? and the actually the second parameter of this parameter , as refer scheme name , the scheme name is ?
Thank you
import java.sql.*;
public class testMeta {
public testMeta() {
ResultSet rs=null;
String url = "jdbc:mysql://localhost:3306/testinnodb";
Connection con = null;
try{
Class.forName("org.gjt.mm.mysql.Driver");
}catch(ClassNotFoundException ex){
System.out.println(ex.getMessage());
try{
con = DriverManager.getConnection(url,"root","rootpwd");
prtS("getConnection complete");
DatabaseMetaData metaData = con.getMetaData();
Connection con2 = metaData.getConnection();
String type[] = new String[1];
type[0] = new String();
prtS("*************** GET Schemas ***************");
rs = metaData.getSchemas();
               while(rs.next()){
System.out.println("12345");
prtS("TABLE_CAT" + " : " + rs.getString(0));
prtS("TABLE_CAT" + " : " + rs.getString("TABLE_SCHEM "));
               rs=null;
prtS("*************** GET PRIMARY KEYS ***************");
rs = metaData.getPrimaryKeys(con.getCatalog(),null,"persons");
while(rs.next()){
prtS("TABLE_CAT" + " : " + rs.getString("TABLE_CAT"));
prtS("TABLE_SCHEM" + " : " + rs.getString("TABLE_SCHEM"));
prtS("TABLE_NAME" + " : " + rs.getString("TABLE_NAME"));
prtS("COLUMN_NAME" + " : " + rs.getString("COLUMN_NAME"));
prtS("KEY_SEQ" + " : " + rs.getString("KEY_SEQ"));
prtS("PK_NAME" + " : " + rs.getString("PK_NAME"));
               rs=null;
prtS("*************** GET Exported KEYS ***************");
rs = metaData.getExportedKeys(con.getCatalog(),null,"shirt");
while(rs.next()){
prtS("FKCOLUMN_NAME" + " : " + rs.getString("FKCOLUMN_NAME"));
               rs=null;
prtS("*************** GET Imported KEYS ***************");
rs = metaData.getImportedKeys(con.getCatalog(),null,"persons");
while(rs.next()){
prtS("PKTABLE_CAT" + " : " + rs.getString("PKTABLE_CAT"));
rs=null;
prtS("*************** GET CrossReference ***************");
rs = metaData.getCrossReference(con.getCatalog(),null,"persons",con.getCatalog(),null,"shirts");
while(rs.next()){
prtS("PKTABLE_CAT" + " : " + rs.getString("PKTABLE_CAT"));
}catch(SQLException ex){
prtS(ex.getMessage());

Answer 1

How i know the jdbc driver not compatible to this
mechanismBy reading the documentation tthat comes with your driver. Recent versions of the MySQL JDBC driver do support the getExportedKeys/ImportegKeys methods but the table needs to be crated as InnoDB.
So run the SQL command
show table statusWhats under the Type column for your table? If it isn't InnoDB then this isn't going to work.
If it is InnoDB but getExportedKeys/ImportegKeys still don't work then you haven't used the "foreign key" constraint in your "create table" command