SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 4)
    Function cityHash64 (alias x1) (children 1)
     ExpressionList (children 3)
      Function materialize (children 1)
       ExpressionList (children 1)
        Literal UInt64_1
      Function materialize (children 1)
       ExpressionList (children 1)
        Literal UInt64_2
      Literal \'\'
    Function cityHash64 (alias x2) (children 1)
     ExpressionList (children 2)
      Function tuple (children 1)
       ExpressionList (children 2)
        Function materialize (children 1)
         ExpressionList (children 1)
          Literal UInt64_1
        Function materialize (children 1)
         ExpressionList (children 1)
          Literal UInt64_2
      Literal \'\'
    Function cityHash64 (alias x3) (children 1)
     ExpressionList (children 2)
      Function materialize (children 1)
       ExpressionList (children 1)
        Literal UInt64_1
      Function tuple (children 1)
       ExpressionList (children 2)
        Function materialize (children 1)
         ExpressionList (children 1)
          Literal UInt64_2
        Literal \'\'
    Function cityHash64 (alias x4) (children 1)
     ExpressionList (children 1)
      Function tuple (children 1)
       ExpressionList (children 3)
        Function materialize (children 1)
         ExpressionList (children 1)
          Literal UInt64_1
        Function materialize (children 1)
         ExpressionList (children 1)
          Literal UInt64_2
        Literal \'\'
