Explain EXPLAIN SYNTAX (children 1)
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 2)
    ExpressionList (children 1)
     Function plus (children 1)
      ExpressionList (children 2)
       Function plus (children 1)
        ExpressionList (children 2)
         Function plus (children 1)
          ExpressionList (children 2)
           Function sum (children 1)
            ExpressionList (children 1)
             Function plus (children 1)
              ExpressionList (children 2)
               Identifier n
               Literal UInt64_1
           Function sum (children 1)
            ExpressionList (children 1)
             Function plus (children 1)
              ExpressionList (children 2)
               Literal UInt64_1
               Identifier n
         Function sum (children 1)
          ExpressionList (children 1)
           Function minus (children 1)
            ExpressionList (children 2)
             Identifier n
             Literal UInt64_1
       Function sum (children 1)
        ExpressionList (children 1)
         Function minus (children 1)
          ExpressionList (children 2)
           Literal UInt64_1
           Identifier n
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       Subquery (children 1)
        SelectWithUnionQuery (children 1)
         ExpressionList (children 1)
          SelectQuery (children 2)
           ExpressionList (children 1)
            Identifier number (alias n)
           TablesInSelectQuery (children 1)
            TablesInSelectQueryElement (children 1)
             TableExpression (children 1)
              Function numbers (children 1)
               ExpressionList (children 1)
                Literal UInt64_10
