java - The "route_id" not found -

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i trying id of inserted raw in routes table. getting error column 'route_id' not found route , direction being inserted in table before why getting error?

code:

databasemetadata dbm = con.getmetadata();          resultset routestables = dbm.gettables(null, null, "routes",                 null);         int route_id;         if (routestables.next()) {              preparedstatement preproutesinsert = con.preparestatement(                     "insert routes(direction, route)"                             + "values( ?, ?)",                     statement.return_generated_keys);              preproutesinsert.setstring(1, direction);             preproutesinsert.setint(2, route);              preproutesinsert.executeupdate();              try (resultset generatedkeys = preproutesinsert                     .getgeneratedkeys()) {                 if (generatedkeys.next()) {                     int id = generatedkeys.getint("route_id");                     system.out.println("the id is: " + id);                 }              }

routes table structure:

   stt.execute("create table if not exists routes ("                 + "route_id int(11) not null auto_increment primary key,"                 + "direction varchar(30) not null, "                 + "route int(11) not null )");

screenshot of geratedkeys variable:

enter image description here

edit: when query getting route_id of raws in routes table:

             preparedstatement preproutesinsert2 =              con.preparestatement(              "select route_id routes",              statement.return_generated_keys);              resultset rs = preproutesinsert2.executequery();              while(rs.next()){              int route_id2 = rs.getint("route_id");              system.out.println(route_id2);              }

use

int id = generatedkeys.getint(1);

instead.

the comment posted in response this mysql bug says that:

you shouldn't retrieve these columns name. index, since there can ever 1 column mysql , auto_increments returns value(s) can exposed statement.getgeneratedkeys().

if want to, can use 

int id = generatedkeys.getint("generated_key");

instead, , work, wouldn't recommend it. a similar question asks why name generated_key used, , answer quotes same bug linked above.


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