SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function arrayShingles (children 1)
     ExpressionList (children 2)
      Function array (children 1)
       ExpressionList (children 2)
        Function toNullable (children 1)
         ExpressionList (children 1)
          Literal UInt64_2
        Function toNullable (children 1)
         ExpressionList (children 1)
          Literal UInt64_1
      Literal UInt64_1
