SelectWithUnionQuery (children 3)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier users (alias u1)
   Function or (children 1)
    ExpressionList (children 2)
     Function equals (children 1)
      ExpressionList (children 2)
       Identifier age
       Literal UInt64_50
     Function exists (children 1)
      ExpressionList (children 1)
       Subquery (children 1)
        SelectWithUnionQuery (children 1)
         ExpressionList (children 2)
          SelectQuery (children 3)
           ExpressionList (children 1)
            Asterisk
           TablesInSelectQuery (children 1)
            TablesInSelectQueryElement (children 1)
             TableExpression (children 1)
              TableIdentifier users2 (alias u2)
           Function equals (children 1)
            ExpressionList (children 2)
             Identifier u1.age
             Identifier u2.age
          SelectQuery (children 3)
           ExpressionList (children 1)
            Asterisk
           TablesInSelectQuery (children 1)
            TablesInSelectQueryElement (children 1)
             TableExpression (children 1)
              TableIdentifier users2 (alias u2)
           Function notEquals (children 1)
            ExpressionList (children 2)
             Identifier u1.age
             Identifier u2.age
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier ALL
 Identifier Null
 Set
