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 toUInt8 (children 1)
         ExpressionList (children 1)
          Literal UInt64_0
      Function xxHash32 (children 1)
       ExpressionList (children 1)
        Literal \'\\0\'