SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function equals (children 1)
     ExpressionList (children 2)
      Function tuple (children 1)
       ExpressionList (children 2)
        Function materialize (children 1)
         ExpressionList (children 1)
          Function toUInt64OrNull (children 1)
           ExpressionList (children 1)
            Literal \'\'
        Function toUInt64OrNull (children 1)
         ExpressionList (children 1)
          Literal \'\'
      Function tuple (children 1)
       ExpressionList (children 2)
        Function toUInt64OrNull (children 1)
         ExpressionList (children 1)
          Literal \'\'
        Function toUInt64OrNull (children 1)
         ExpressionList (children 1)
          Literal \'\'
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function numbers (children 1)
       ExpressionList (children 1)
        Literal UInt64_1
