SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function equals (children 1)
     ExpressionList (children 2)
      Function xxHash32 (children 1)
       ExpressionList (children 1)
        Function toUInt16 (children 1)
         ExpressionList (children 1)
          Literal UInt64_0
      Function xxHash32 (children 1)
       ExpressionList (children 1)
        Literal \'\\0\\0\'