_ruby.sql.query.partial

require 'pg'
begin
    conn =PG.connect( host: "127.0.0.1", port: 8812, dbname: 'qdb',
                      user: 'admin', password: 'quest' )
    rows = conn.exec 'SELECT x FROM long_sequence(5);'
    rows.each do |row|
        puts row
    end
rescue PG::Error => e
     puts e.message
ensure
    conn.close if conn
end