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)
        Literal \'\'
      Function toUInt64 (children 1)
       ExpressionList (children 1)
        Literal UInt64_17241709254077376921