Get email attachment and save into oracle table in google app script
function testMail() {
var threads = GmailApp.getInboxThreads();
for (var i = 0; i < 10; i++) {
  var mess=threads[i].getMessages()[0];
  if (mess.getAttachments().length>0)
  {
    //var filename=mess.getAttachments()[0].
    Logger.log(mess.getSubject());
    Logger.log(mess.getAttachments()[0].getName());
    var conn = Jdbc.getConnection("jdbc:oracle:thin:@xxx.xxx.xxx.xxx/xxx.xxx.xxx", "xxx","xxxxxxx");
    conn.setAutoCommit(false);
    var stmt = conn.prepareStatement("insert into blob_table (filnname,blob_field) values (?,?)");
    stmt.setString(1, mess.getAttachments()[0].getName());

    stmt.setBlob(2, mess.getAttachments()[0]);
    var res = stmt.execute();
    conn.commit();
    conn.close();

    break;
  }
}
}

conn.createBlob().setBytes(0, myOriginalBlob)