SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function equals (children 1)
     ExpressionList (children 2)
      Function xxHash64 (children 1)
       ExpressionList (children 1)
        Function toUInt8 (children 1)
         ExpressionList (children 1)
          Literal UInt64_0
      Function xxHash64 (children 1)
       ExpressionList (children 1)
        Literal \'\\0\'