SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function arrayMap (children 1)
     ExpressionList (children 2)
      Function lambda (children 1)
       ExpressionList (children 2)
        Function tuple (children 1)
         ExpressionList (children 1)
          Identifier x
        Function plus (children 1)
         ExpressionList (children 2)
          Identifier x
          Function arrayElement (children 1)
           ExpressionList (children 2)
            Function arrayMap (children 1)
             ExpressionList (children 2)
              Function lambda (children 1)
               ExpressionList (children 2)
                Function tuple (children 1)
                 ExpressionList (children 1)
                  Identifier y
                Function plus (children 1)
                 ExpressionList (children 2)
                  Function plus (children 1)
                   ExpressionList (children 2)
                    Identifier x
                    Identifier y
                  Function toLowCardinality (children 1)
                   ExpressionList (children 1)
                    Literal UInt64_1
              Function array (children 1)
               ExpressionList
            Literal UInt64_1
      Function array (children 1)
       ExpressionList
