Re: Java class for data type mapper?

=?ISO-8859-1?Q?Arne_Vajh=F8j?= <>
Thu, 28 Jan 2010 20:51:51 -0500
On 28-01-2010 15:12, New Java 456 wrote:

I'm sure someone has this. Need to map data types from all the various
dbs. I can reverse it out of the Postgresql doc but does anyone at
least have a better doc; for I'd have to look up each sqltype
definition from the vendor jdbc classes.
We need Java code, not a tool. Maybe this mapping exists inside some
ETL open source tool already?

If you have the database running then you can so like this:

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;

public class GetDBTypes {
     public static void test(String driver, String conurl, String un,
String pw) throws ClassNotFoundException, SQLException {
         Connection con = DriverManager.getConnection(conurl, un, pw);
         ResultSet rs = con.getMetaData().getTypeInfo();
         while( {
             System.out.println(rs.getString("TYPE_NAME") + " -> " +
     public static void main(String[] args) throws Exception {
         test("com.mysql.jdbc.Driver", "jdbc:mysql://localhost/Test",
"root", "");


PS: The integer written out is java.sql.Types !

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