sql statement combinator parser

SQLParser.scala

package par

import scala.util.parsing.combinator._


class SqlTokenParser extends JavaTokenParsers{
	
  def ws : Parser[String] = """\s+""".r
  
  def query : Parser[Any] = selectClouse ~ fromClouse
  
  def subquerys : Parser[Any] = repsep(subquery,",")
  
  def subquery : Parser[Any] = ws ~ "("~ ws  ~ query ~ ws ~ ")"~ ws ~ opt(ident)
  
  def column : Parser[Any] =  "*" | ident | stringLiteral ~ opt(ws ~"as"~ ws ~ ident)
  
  def columns : Parser[Any] = repsep(column,",")
  
  def selectClouse : Parser[Any] = "select" ~  repsep( columns | subquerys ,",")
  
  def tableNames : Parser[Any] = repsep(tableName,",") 
  
  def tableName : Parser[Any] = ident | "dual"  ~ opt(ws ~ "as"~ ws ~ ident)
  
  def fromClouse : Parser[Any] = "from" ~ repsep(tableNames | subquerys,",")
  
}

import java.io.{File,FileReader}
object ST extends SqlTokenParser {
  def main(args: Array[String]) {
    Console println new File(".").getAbsolutePath
    val reader = new FileReader("./src/SQL")
    println(parseAll(query, reader))
  }
}