SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 2)
         SelectQuery (children 1)
          ExpressionList (children 2)
           Literal \'v1\' (alias c1)
           Literal NULL (alias c2)
         SelectQuery (children 1)
          ExpressionList (children 2)
           Literal \'v2\' (alias c1)
           Literal \'\' (alias c2)
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 1)
          ExpressionList (children 2)
           Literal \'v1\' (alias c1)
           Literal \'w1\' (alias c2)
     TableJoin (children 1)
      ExpressionList (children 2)
       Identifier c1
       Identifier c2
   ExpressionList (children 2)
    OrderByElement (children 1)
     Identifier c1
    OrderByElement (children 1)
     Identifier c2
