SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function any (children 1)
     ExpressionList (children 1)
      Literal \'x\'
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier e
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      Subquery (alias da) (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 1)
          ExpressionList (children 1)
           Literal UInt64_1 (alias joinKey)
     TableJoin (children 1)
      Function equals (children 1)
       ExpressionList (children 2)
        Identifier joinKey
        Identifier a
   Function equals (children 1)
    ExpressionList (children 2)
     Function toString (children 1)
      ExpressionList (children 1)
       Identifier a
     Literal \'x\'
