SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 1)
    Function toUInt64 (alias x) (children 1)
     ExpressionList (children 1)
      Literal UInt64_1
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 1)
          ExpressionList (children 1)
           Literal UInt64_1
   ExpressionList (children 1)
    Literal UInt64_1
   Function in (children 1)
    ExpressionList (children 2)
     Identifier x
     Subquery (children 1)
      SelectWithUnionQuery (children 1)
       ExpressionList (children 1)
        SelectQuery (children 2)
         ExpressionList (children 1)
          Function countIf (children 1)
           ExpressionList (children 2)
            Identifier y
            Function equals (children 1)
             ExpressionList (children 2)
              Identifier z
              Literal UInt64_1
         TablesInSelectQuery (children 1)
          TablesInSelectQueryElement (children 1)
           TableExpression (children 1)
            Subquery (children 1)
             SelectWithUnionQuery (children 1)
              ExpressionList (children 1)
               SelectQuery (children 1)
                ExpressionList (children 2)
                 Literal UInt64_1 (alias y)
                 Literal UInt64_1 (alias z)