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 toUInt16 (children 1)
         ExpressionList (children 1)
          Literal UInt64_0
      Function xxHash64 (children 1)
       ExpressionList (children 1)
        Literal \'\\0\\0\'