SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier a
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      TableIdentifier j
     TableJoin (children 1)
      ExpressionList (children 1)
       Identifier id
   ExpressionList (children 2)
    OrderByElement (children 1)
     Identifier a.id
    OrderByElement (children 1)
     Identifier a.val
   Set
