getCatalogs()
Syntax:
ResultSet getCatalogs()
                      throws SQLException
                                        Description:
Retrieves the catalog names available in this database. The results are ordered by catalog name.
The catalog column is:
| TABLE_CAT | String | catalog name | 
Returns:
a ResultSet object in which each row has a single String column that is a catalog name
Throws:
SQLException - if a database access error occurs or the database metadata object is closed