split last keyword in parboiled2 avoid greedy match

[cjue...@gmail.com]

hi ，I have a regex like this:

```scala

private final val queryPattern = Pattern.compile("(?s)(.*)\\s+as\\s+(\\w+)\\s*”)

def getQueryDataConfig(sql: String) = {

  val matchSql = queryPattern.matcher(sql)

  if (matchSql.matches()) {

   (matchSql.group(1), matchSql.group(2))

  } else {

    throw new IllegalArgumentException(s"query sql error :$sql,we need select * from xxx as tempTableName")

  }

}

```

my input is :"select uid as id ,name ,age from a left join b on a.uid = b.uid as my_test" , i want result is tuple: ("select uid as id ,name ,age from a left join b on a.uid = b.uid","my_test")

I want to split my input string using last `as` ,how can i do in parboiled2 ,thanks

best regards