SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function equals (alias x) (children 1)
     ExpressionList (children 2)
      Literal \'1\'
      Function replaceRegexpOne (children 1)
       ExpressionList (children 3)
        Literal \',,1\'
        Literal \'^[,]*|[,]*$\'
        Literal \'\'
